:root {
  /* Primitive Color Tokens */
  --color-white: rgba(255, 255, 255, 1);
  --color-black: rgba(0, 0, 0, 1);
  --color-cream-50: rgba(252, 252, 249, 1);
  --color-cream-100: rgba(255, 255, 253, 1);
  --color-gray-200: rgba(245, 245, 245, 1);
  --color-gray-300: rgba(167, 169, 169, 1);
  --color-gray-400: rgba(119, 124, 124, 1);
  --color-slate-500: rgba(98, 108, 113, 1);
  --color-brown-600: rgba(94, 82, 64, 1);
  --color-charcoal-700: rgba(31, 33, 33, 1);
  --color-charcoal-800: rgba(38, 40, 40, 1);
  --color-slate-900: rgba(19, 52, 59, 1);
  --color-teal-300: rgba(50, 184, 198, 1);
  --color-teal-400: rgba(45, 166, 178, 1);
  --color-teal-500: rgba(33, 128, 141, 1);
  --color-teal-600: rgba(29, 116, 128, 1);
  --color-teal-700: rgba(26, 104, 115, 1);
  --color-teal-800: rgba(41, 150, 161, 1);
  --color-red-400: rgba(255, 84, 89, 1);
  --color-red-500: rgba(192, 21, 47, 1);
  --color-orange-400: rgba(230, 129, 97, 1);
  --color-orange-500: rgba(168, 75, 47, 1);

  /* RGB versions for opacity control */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;
  --color-slate-500-rgb: 98, 108, 113;
  --color-red-500-rgb: 192, 21, 47;
  --color-red-400-rgb: 255, 84, 89;
  --color-orange-500-rgb: 168, 75, 47;
  --color-orange-400-rgb: 230, 129, 97;

  /* Background color tokens (Light Mode) */
  --color-bg-1: rgba(59, 130, 246, 0.08); /* Light blue */
  --color-bg-2: rgba(245, 158, 11, 0.08); /* Light yellow */
  --color-bg-3: rgba(34, 197, 94, 0.08); /* Light green */
  --color-bg-4: rgba(239, 68, 68, 0.08); /* Light red */
  --color-bg-5: rgba(147, 51, 234, 0.08); /* Light purple */
  --color-bg-6: rgba(249, 115, 22, 0.08); /* Light orange */
  --color-bg-7: rgba(236, 72, 153, 0.08); /* Light pink */
  --color-bg-8: rgba(6, 182, 212, 0.08); /* Light cyan */

  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);
  --color-select-caret: rgba(var(--color-slate-900-rgb), 0.8);

  /* Common style patterns */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for opacity control */
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;

  /* Typography */
  --font-family-base: "FKGroteskNeue", "Geist", "Inter", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo,
    Monaco, Consolas, monospace;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;

  /* Spacing */
  --space-0: 0;
  --space-1: 1px;
  --space-2: 2px;
  --space-4: 4px;
  --space-6: 6px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04),
    0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04),
    0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);

  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root {
    /* RGB versions for opacity control (Dark Mode) */
    --color-gray-400-rgb: 119, 124, 124;
    --color-teal-300-rgb: 50, 184, 198;
    --color-gray-300-rgb: 167, 169, 169;
    --color-gray-200-rgb: 245, 245, 245;

    /* Background color tokens (Dark Mode) */
    --color-bg-1: rgba(29, 78, 216, 0.15); /* Dark blue */
    --color-bg-2: rgba(180, 83, 9, 0.15); /* Dark yellow */
    --color-bg-3: rgba(21, 128, 61, 0.15); /* Dark green */
    --color-bg-4: rgba(185, 28, 28, 0.15); /* Dark red */
    --color-bg-5: rgba(107, 33, 168, 0.15); /* Dark purple */
    --color-bg-6: rgba(194, 65, 12, 0.15); /* Dark orange */
    --color-bg-7: rgba(190, 24, 93, 0.15); /* Dark pink */
    --color-bg-8: rgba(8, 145, 178, 0.15); /* Dark cyan */

    /* Semantic Color Tokens (Dark Mode) */
    --color-background: var(--color-charcoal-700);
    --color-surface: var(--color-charcoal-800);
    --color-text: var(--color-gray-200);
    --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
    --color-primary: var(--color-teal-300);
    --color-primary-hover: var(--color-teal-400);
    --color-primary-active: var(--color-teal-800);
    --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
    --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
    --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
    --color-border: rgba(var(--color-gray-400-rgb), 0.3);
    --color-error: var(--color-red-400);
    --color-success: var(--color-teal-300);
    --color-warning: var(--color-orange-400);
    --color-info: var(--color-gray-300);
    --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
    --color-btn-primary-text: var(--color-slate-900);
    --color-card-border: rgba(var(--color-gray-400-rgb), 0.2);
    --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
    --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
      inset 0 -1px 0 rgba(0, 0, 0, 0.15);
    --button-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
    --color-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
    --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

    /* Common style patterns - updated for dark mode */
    --focus-ring: 0 0 0 3px var(--color-focus-ring);
    --focus-outline: 2px solid var(--color-primary);
    --status-bg-opacity: 0.15;
    --status-border-opacity: 0.25;
    --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

    /* RGB versions for dark mode */
    --color-success-rgb: var(--color-teal-300-rgb);
    --color-error-rgb: var(--color-red-400-rgb);
    --color-warning-rgb: var(--color-orange-400-rgb);
    --color-info-rgb: var(--color-gray-300-rgb);
  }
}

/* Data attribute for manual theme switching */
[data-color-scheme="dark"] {
  /* RGB versions for opacity control (dark mode) */
  --color-gray-400-rgb: 119, 124, 124;
  --color-teal-300-rgb: 50, 184, 198;
  --color-gray-300-rgb: 167, 169, 169;
  --color-gray-200-rgb: 245, 245, 245;

  /* Colorful background palette - Dark Mode */
  --color-bg-1: rgba(29, 78, 216, 0.15); /* Dark blue */
  --color-bg-2: rgba(180, 83, 9, 0.15); /* Dark yellow */
  --color-bg-3: rgba(21, 128, 61, 0.15); /* Dark green */
  --color-bg-4: rgba(185, 28, 28, 0.15); /* Dark red */
  --color-bg-5: rgba(107, 33, 168, 0.15); /* Dark purple */
  --color-bg-6: rgba(194, 65, 12, 0.15); /* Dark orange */
  --color-bg-7: rgba(190, 24, 93, 0.15); /* Dark pink */
  --color-bg-8: rgba(8, 145, 178, 0.15); /* Dark cyan */

  /* Semantic Color Tokens (Dark Mode) */
  --color-background: var(--color-charcoal-700);
  --color-surface: var(--color-charcoal-800);
  --color-text: var(--color-gray-200);
  --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
  --color-primary: var(--color-teal-300);
  --color-primary-hover: var(--color-teal-400);
  --color-primary-active: var(--color-teal-800);
  --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
  --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
  --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
  --color-border: rgba(var(--color-gray-400-rgb), 0.3);
  --color-error: var(--color-red-400);
  --color-success: var(--color-teal-300);
  --color-warning: var(--color-orange-400);
  --color-info: var(--color-gray-300);
  --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
  --color-btn-primary-text: var(--color-slate-900);
  --color-card-border: rgba(var(--color-gray-400-rgb), 0.15);
  --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.15);
  --color-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
  --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

  /* Common style patterns - updated for dark mode */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for dark mode */
  --color-success-rgb: var(--color-teal-300-rgb);
  --color-error-rgb: var(--color-red-400-rgb);
  --color-warning-rgb: var(--color-orange-400-rgb);
  --color-info-rgb: var(--color-gray-300-rgb);
}

[data-color-scheme="light"] {
  /* RGB versions for opacity control (light mode) */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;

  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);

  /* RGB versions for light mode */
  --color-success-rgb: var(--color-teal-500-rgb);
  --color-error-rgb: var(--color-red-500-rgb);
  --color-warning-rgb: var(--color-orange-500-rgb);
  --color-info-rgb: var(--color-slate-500-rgb);
}

/* Base styles */
html {
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-4xl);
}
h2 {
  font-size: var(--font-size-3xl);
}
h3 {
  font-size: var(--font-size-2xl);
}
h4 {
  font-size: var(--font-size-xl);
}
h5 {
  font-size: var(--font-size-lg);
}
h6 {
  font-size: var(--font-size-md);
}

p {
  margin: 0 0 var(--space-16) 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

a:hover {
  color: var(--color-primary-hover);
}

code,
pre {
  font-family: var(--font-family-mono);
  font-size: calc(var(--font-size-base) * 0.95);
  background-color: var(--color-secondary);
  border-radius: var(--radius-sm);
}

code {
  padding: var(--space-1) var(--space-4);
}

pre {
  padding: var(--space-16);
  margin: var(--space-16) 0;
  overflow: auto;
  border: 1px solid var(--color-border);
}

pre code {
  background: none;
  padding: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  border: none;
  text-decoration: none;
  position: relative;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
}

.btn--primary:active {
  background: var(--color-primary-active);
}

.btn--secondary {
  background: var(--color-secondary);
  color: var(--color-text);
}

.btn--secondary:hover {
  background: var(--color-secondary-hover);
}

.btn--secondary:active {
  background: var(--color-secondary-active);
}

.btn--outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn--outline:hover {
  background: var(--color-secondary);
}

.btn--sm {
  padding: var(--space-4) var(--space-12);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn--lg {
  padding: var(--space-10) var(--space-20);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
}

.btn--full-width {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Form elements */
.form-control {
  display: block;
  width: 100%;
  padding: var(--space-8) var(--space-12);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  transition: border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

textarea.form-control {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
}

select.form-control {
  padding: var(--space-8) var(--space-12);
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: var(--select-caret-light);
  background-repeat: no-repeat;
  background-position: right var(--space-12) center;
  background-size: 16px;
  padding-right: var(--space-32);
}

/* Add a dark mode specific caret */
@media (prefers-color-scheme: dark) {
  select.form-control {
    background-image: var(--select-caret-dark);
  }
}

/* Also handle data-color-scheme */
[data-color-scheme="dark"] select.form-control {
  background-image: var(--select-caret-dark);
}

[data-color-scheme="light"] select.form-control {
  background-image: var(--select-caret-light);
}

.form-control:focus {
  border-color: var(--color-primary);
  outline: var(--focus-outline);
}

.form-label {
  display: block;
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.form-group {
  margin-bottom: var(--space-16);
}

/* Card component */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--duration-normal) var(--ease-standard);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card__body {
  padding: var(--space-16);
}

.card__header,
.card__footer {
  padding: var(--space-16);
  border-bottom: 1px solid var(--color-card-border-inner);
}

/* Status indicators - simplified with CSS variables */
.status {
  display: inline-flex;
  align-items: center;
  padding: var(--space-6) var(--space-12);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.status--success {
  background-color: rgba(
    var(--color-success-rgb, 33, 128, 141),
    var(--status-bg-opacity)
  );
  color: var(--color-success);
  border: 1px solid
    rgba(var(--color-success-rgb, 33, 128, 141), var(--status-border-opacity));
}

.status--error {
  background-color: rgba(
    var(--color-error-rgb, 192, 21, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-error);
  border: 1px solid
    rgba(var(--color-error-rgb, 192, 21, 47), var(--status-border-opacity));
}

.status--warning {
  background-color: rgba(
    var(--color-warning-rgb, 168, 75, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-warning);
  border: 1px solid
    rgba(var(--color-warning-rgb, 168, 75, 47), var(--status-border-opacity));
}

.status--info {
  background-color: rgba(
    var(--color-info-rgb, 98, 108, 113),
    var(--status-bg-opacity)
  );
  color: var(--color-info);
  border: 1px solid
    rgba(var(--color-info-rgb, 98, 108, 113), var(--status-border-opacity));
}

/* Container layout */
.container {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
  padding-right: var(--space-16);
  padding-left: var(--space-16);
}

@media (min-width: 640px) {
  .container {
    max-width: var(--container-sm);
  }
}
@media (min-width: 768px) {
  .container {
    max-width: var(--container-md);
  }
}
@media (min-width: 1024px) {
  .container {
    max-width: var(--container-lg);
  }
}
@media (min-width: 1280px) {
  .container {
    max-width: var(--container-xl);
  }
}

/* Utility classes */
.flex {
  display: flex;
}
.flex-col {
  flex-direction: column;
}
.items-center {
  align-items: center;
}
.justify-center {
  justify-content: center;
}
.justify-between {
  justify-content: space-between;
}
.gap-4 {
  gap: var(--space-4);
}
.gap-8 {
  gap: var(--space-8);
}
.gap-16 {
  gap: var(--space-16);
}

.m-0 {
  margin: 0;
}
.mt-8 {
  margin-top: var(--space-8);
}
.mb-8 {
  margin-bottom: var(--space-8);
}
.mx-8 {
  margin-left: var(--space-8);
  margin-right: var(--space-8);
}
.my-8 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.p-0 {
  padding: 0;
}
.py-8 {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}
.px-8 {
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}
.py-16 {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}
.px-16 {
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

.block {
  display: block;
}
.hidden {
  display: none;
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

/* Dark mode specifics */
[data-color-scheme="dark"] .btn--outline {
  border: 1px solid var(--color-border-secondary);
}

@font-face {
  font-family: 'FKGroteskNeue';
  src: url('https://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2')
    format('woff2');
}

/* END PERPLEXITY DESIGN SYSTEM */
/* Enhanced Portfolio Website Styles */

/* Import design system variables first */
:root {
  /* Additional custom variables for enhanced features */
  --animation-duration: 0.6s;
  --card-hover-transform: translateY(-8px);
  --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-teal-400));
  --gradient-secondary: linear-gradient(135deg, var(--color-bg-1), var(--color-bg-2));
  --particle-color: rgba(var(--color-teal-500-rgb), 0.1);
}

/* Reset and base styles */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-background);
    overflow-x: hidden;
}

/* Enhanced Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 253, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: all var(--duration-normal) var(--ease-standard);
}

@media (prefers-color-scheme: dark) { .navbar { background-color: rgba(38,40,40,0.95); } }
[data-color-scheme="dark"] .navbar {
    background-color: rgba(38, 40, 40, 0.95);
}

.nav-container {
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-16);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo .logo-text {
    font-size: var(--font-size-xl);
    white-space: nowrap;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-search {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    width: 250px;
    padding: var(--space-8) var(--space-12);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    background: var(--color-surface);
    color: var(--color-text);
    transition: all var(--duration-fast) var(--ease-standard);
}

.search-input:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: var(--focus-ring);
}

.nav-search i {
    position: absolute;
    right: var(--space-12);
    color: var(--color-text-secondary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    padding: 6px 8px;
    border-radius: var(--radius-base);
    transition: all var(--duration-fast) var(--ease-standard);
    font-size: 12px;
    white-space: nowrap;
    /* Explicit colors — prevents cascade issues when toggling themes */
    color: rgba(19, 52, 59, 1); /* light mode: slate-900 */
}
/* Dark mode nav-link text */
[data-color-scheme="dark"] .nav-link {
    color: rgba(245, 245, 245, 1); /* gray-200 */
}
/* Light mode nav-link text (explicit override) */
[data-color-scheme="light"] .nav-link {
    color: rgba(19, 52, 59, 1); /* slate-900 */
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background-color: var(--color-secondary);
}

.breadcrumb {
    padding: var(--space-8) var(--space-16);
    background: var(--color-secondary);
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.visitor-counter {
    position: fixed;
    top: 90px;
    right: var(--space-20);
    background: var(--color-surface);
    padding: var(--space-8) var(--space-12);
    border-radius: var(--radius-base);
    border: 1px solid var(--color-border);
    font-size: var(--font-size-xs);
    z-index: 100;
    display: flex;
    align-items: center;
    gap: var(--space-4);
    box-shadow: var(--shadow-sm);
}

.visitor-counter i {
    color: var(--color-primary);
}

/* Enhanced Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-secondary);
    padding: 100px 0 var(--space-32);
    position: relative;
    overflow: hidden;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background: radial-gradient(circle at 20% 20%, var(--particle-color) 1px, transparent 1px),
                radial-gradient(circle at 80% 80%, var(--particle-color) 1px, transparent 1px);
    background-size: 50px 50px, 80px 80px;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-20px) rotate(2deg); }
    66% { transform: translateY(10px) rotate(-1deg); }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-32);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-text {
    max-width: 600px;
}

.greeting {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-normal);
    display: block;
    margin-bottom: var(--space-8);
}

.name-highlight {
    color: var(--color-primary);
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    display: block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    color: var(--color-text-secondary);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--space-16);
}

.hero-tagline {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin-bottom: var(--space-20);
    min-height: 30px;
    font-weight: var(--font-weight-medium);
}

.cursor {
    animation: blink 1s infinite;
    color: var(--color-primary);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-summary {
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-24);
}

.hero-stats {
    display: flex;
    gap: var(--space-32);
    margin-bottom: var(--space-24);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-4);
}

.hero-buttons {
    display: flex;
    gap: var(--space-16);
    margin-bottom: var(--space-24);
    flex-wrap: wrap;
}

.social-links {
    display: flex;
    gap: var(--space-16);
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: var(--color-secondary);
    color: var(--color-text);
    font-size: var(--font-size-lg);
    transition: all var(--duration-normal) var(--ease-standard);
    text-decoration: none;
}

.social-link:hover {
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.avatar-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar-placeholder {
    width: 300px;
    height: 300px;
    border-radius: var(--radius-full);
    background: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 120px;
    color: var(--color-primary);
    border: 4px solid var(--color-primary);
    position: relative;
    z-index: 2;
}

.avatar-ring {
    position: absolute;
    width: 320px;
    height: 320px;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-full);
    border-top-color: transparent;
    animation: rotate 3s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Container */
.container {
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-16);
}

/* Section Styles */
section {
    padding: var(--space-32) 0;
    display: block;
    visibility: visible;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-32);
}

.section-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-12);
    color: var(--color-text);
    font-weight: var(--font-weight-bold);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-16);
}

/* Filter Buttons */
.skill-filters,
.project-filters {
    display: flex;
    justify-content: center;
    gap: var(--space-12);
    margin-top: var(--space-20);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--space-8) var(--space-16);
    background: var(--color-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-standard);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    border-color: var(--color-primary);
}

/* About Section */
.about {
    background: var(--color-surface);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--space-32);
    align-items: start;
}

.about-text h3 {
    margin-bottom: var(--space-16);
    color: var(--color-primary);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

.about-text p {
    margin-bottom: var(--space-16);
    line-height: var(--line-height-normal);
    color: var(--color-text);
}

.expertise-areas {
    margin-top: var(--space-24);
}

.expertise-areas h4 {
    margin-bottom: var(--space-16);
    color: var(--color-text);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-16);
}

.expertise-item {
    display: flex;
    align-items: center;
    gap: var(--space-12);
    padding: var(--space-12);
    background: var(--color-bg-2);
    border-radius: var(--radius-base);
    font-weight: var(--font-weight-medium);
    transition: all var(--duration-fast) var(--ease-standard);
}

.expertise-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.expertise-item i {
    color: var(--color-primary);
    font-size: var(--font-size-lg);
}

.education-timeline {
    margin-top: var(--space-24);
}

.education-timeline h3 {
    margin-bottom: var(--space-20);
    color: var(--color-primary);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

.timeline {
    position: relative;
    padding-left: var(--space-24);
}

.timeline::before {
    content: '';
    position: absolute;
    left: var(--space-12);
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-primary);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-24);
}

.timeline-dot {
    position: absolute;
    left: -30px;
    top: var(--space-8);
    width: 16px;
    height: 16px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    border: 3px solid var(--color-surface);
}

.timeline-content h4 {
    margin-bottom: var(--space-4);
    color: var(--color-text);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.timeline-content p {
    margin-bottom: var(--space-4);
    color: var(--color-text-secondary);
}

.timeline-date {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
}

.coursework {
    margin-top: var(--space-8);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-6);
}

.course-tag {
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    padding: var(--space-2) var(--space-6);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

.skills-radar h3 {
    text-align: center;
    margin-bottom: var(--space-20);
    color: var(--color-primary);
}

.chart-container {
    position: relative;
    height: 400px;
    width: 100%;
}

/* Enhanced Skills Section */
.skills {
    background: var(--color-background);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-24);
}

.skill-category {
    background: var(--color-surface);
    padding: var(--space-24);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-normal) var(--ease-standard);
}

.skill-category:hover {
    transform: var(--card-hover-transform);
    box-shadow: var(--shadow-lg);
}

.skill-category h3 {
    margin-bottom: var(--space-20);
    color: var(--color-primary);
    text-align: center;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
}

.skill-item {
    margin-bottom: 0;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-8);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    font-size: var(--font-size-base);
}

.skill-years {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.skill-bar {
    height: 8px;
    background: var(--color-secondary);
    border-radius: var(--radius-base);
    overflow: hidden;
    margin-bottom: var(--space-4);
}

.skill-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-base);
    transition: width 1s ease-in-out;
    opacity: 1;
}

.skill-details {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

/* Enhanced Projects Section */
.projects {
    background: var(--color-surface);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--space-24);
}

.project-card {
    background: var(--color-background);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-card-border);
    transition: all var(--duration-normal) var(--ease-standard);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.project-card:hover {
    transform: var(--card-hover-transform);
    box-shadow: var(--shadow-lg);
}

.project-image {
    height: 200px;
    background: var(--color-bg-1);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.project-placeholder {
    font-size: 60px;
    color: var(--color-primary);
}

.project-status {
    position: absolute;
    top: var(--space-12);
    right: var(--space-12);
    background: var(--color-success);
    color: var(--color-btn-primary-text);
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

.project-content {
    padding: var(--space-20);
}

.project-content h3 {
    margin-bottom: var(--space-12);
    color: var(--color-text);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

.project-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-16);
    line-height: var(--line-height-normal);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-8);
    margin-bottom: var(--space-16);
}

.tech-tag {
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

.project-stats {
    display: flex;
    gap: var(--space-16);
    margin-bottom: var(--space-16);
}

.stat {
    text-align: center;
    flex: 1;
}

.stat-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

.stat-value {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
}

.project-actions {
    display: flex;
    gap: var(--space-8);
}

.project-actions .btn {
    flex: 1;
}

/* Experience Section */
.experience {
    background: var(--color-background);
}

.experience-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.experience-timeline .timeline-item {
    margin-bottom: var(--space-32);
    background: var(--color-surface);
    padding: var(--space-24);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-normal) var(--ease-standard);
}

.experience-timeline .timeline-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.experience-header {
    margin-bottom: var(--space-12);
}

.experience-header h3 {
    color: var(--color-text);
    margin-bottom: var(--space-8);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

.company-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-12);
}

.company {
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    font-size: var(--font-size-lg);
}

.duration {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.achievements {
    list-style: none;
    padding: 0;
    margin-bottom: var(--space-16);
}

.achievements li {
    position: relative;
    padding-left: var(--space-20);
    margin-bottom: var(--space-8);
    line-height: var(--line-height-normal);
}

.achievements li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-size: var(--font-size-sm);
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-8);
    margin-bottom: var(--space-12);
}

.impact-metrics {
    display: flex;
    gap: var(--space-16);
    flex-wrap: wrap;
}

.metric {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.metric i {
    color: var(--color-primary);
}

/* Certificates Section */
.certificates {
    background: var(--color-surface);
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-20);
}

.certificate-item {
    display: flex;
    align-items: center;
    gap: var(--space-16);
    background: var(--color-background);
    padding: var(--space-20);
    border-radius: var(--radius-base);
    border: 1px solid var(--color-card-border);
    transition: all var(--duration-fast) var(--ease-standard);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}

.certificate-item:hover {
    transform: translateX(4px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.certificate-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--color-bg-3);
    border-radius: var(--radius-base);
    color: var(--color-primary);
    font-size: var(--font-size-xl);
    flex-shrink: 0;
}

.certificate-info {
    flex: 1;
}

.certificate-info h4 {
    margin-bottom: var(--space-4);
    color: var(--color-text);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.certificate-info p {
    margin-bottom: var(--space-4);
    color: var(--color-text-secondary);
}

.certificate-date {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
}

.certificate-meta {
    display: flex;
    gap: var(--space-12);
    margin-top: var(--space-8);
}

.grade,
.duration,
.internship {
    font-size: var(--font-size-xs);
    padding: var(--space-2) var(--space-6);
    background: var(--color-secondary);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
}

.cert-details-btn {
    flex-shrink: 0;
}

/* Achievements Section */
.achievements {
    background: var(--color-background);
}

.achievements-grid {
    display: grid;
    gap: var(--space-24);
}

.achievement-card {
    display: flex;
    gap: var(--space-20);
    background: var(--color-surface);
    padding: var(--space-24);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-normal) var(--ease-standard);
}

.achievement-card:hover {
    transform: var(--card-hover-transform);
    box-shadow: var(--shadow-lg);
}

.achievement-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--color-bg-7);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
    font-size: var(--font-size-3xl);
    flex-shrink: 0;
}

.achievement-content h3 {
    margin-bottom: var(--space-8);
    color: var(--color-text);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

.achievement-organizer {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--space-4);
}

.achievement-date {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-16);
}

.achievement-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-16);
    margin-bottom: var(--space-16);
}

.detail-item {
    text-align: center;
}

.detail-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

.detail-value {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
}

.achievement-description {
    margin-bottom: var(--space-16);
    line-height: var(--line-height-normal);
}

.achievement-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-8);
}

/* Research Section */
.research {
    background: var(--color-surface);
}

.research-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-32);
}

.research-interests h3,
.current-research h3 {
    margin-bottom: var(--space-20);
    color: var(--color-primary);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

.interests-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-12);
}

.interest-item {
    display: flex;
    align-items: center;
    gap: var(--space-12);
    padding: var(--space-12);
    background: var(--color-background);
    border-radius: var(--radius-base);
    border: 1px solid var(--color-card-border);
    transition: all var(--duration-fast) var(--ease-standard);
}

.interest-item:hover {
    transform: translateX(4px);
    border-color: var(--color-primary);
}

.interest-item i {
    color: var(--color-primary);
    font-size: var(--font-size-lg);
}

.research-project {
    background: var(--color-background);
    padding: var(--space-20);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
}

.research-project h4 {
    margin-bottom: var(--space-12);
    color: var(--color-text);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.research-status {
    display: flex;
    gap: var(--space-12);
    margin: var(--space-16) 0;
    align-items: center;
}

.status-badge {
    background: var(--color-warning);
    color: var(--color-btn-primary-text);
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

.timeline-info {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.research-methodology h5 {
    margin: var(--space-16) 0 var(--space-8);
    color: var(--color-primary);
}

.research-methodology ul {
    padding-left: var(--space-20);
}

/* Blog Section */
.blog {
    background: var(--color-background);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-24);
}

.blog-article {
    background: var(--color-surface);
    padding: var(--space-20);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-normal) var(--ease-standard);
}

.blog-article:hover {
    transform: var(--card-hover-transform);
    box-shadow: var(--shadow-lg);
}

.article-meta {
    display: flex;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
    font-size: var(--font-size-xs);
}

.article-date {
    color: var(--color-text-secondary);
}

.article-category {
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    padding: var(--space-2) var(--space-6);
    border-radius: var(--radius-sm);
}

.read-time {
    color: var(--color-text-secondary);
}

.blog-article h3 {
    margin-bottom: var(--space-12);
    color: var(--color-text);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

.article-excerpt {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-16);
    line-height: var(--line-height-normal);
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-6);
    margin-bottom: var(--space-16);
}

.article-tag {
    background: var(--color-secondary);
    color: var(--color-text-secondary);
    padding: var(--space-2) var(--space-6);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
}

/* Testimonials Section */
.testimonials {
    background: var(--color-surface);
}

.testimonials-carousel {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
}

.testimonial-item {
    background: var(--color-background);
    padding: var(--space-24);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-sm);
    display: none;
    opacity: 0;
    transition: all var(--duration-normal) var(--ease-standard);
}

.testimonial-item.active {
    display: block;
    opacity: 1;
}

.testimonial-content p {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    margin-bottom: var(--space-20);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-16);
}

.author-avatar {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    color: var(--color-primary);
}

.author-info h4 {
    margin-bottom: var(--space-4);
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
}

.author-info p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.testimonial-navigation {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-16);
    margin-top: var(--space-24);
}

.nav-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--color-secondary);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-standard);
}

.nav-btn:hover {
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
}

.testimonial-dots {
    display: flex;
    gap: var(--space-8);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
    background: var(--color-secondary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-standard);
}

.dot.active {
    background: var(--color-primary);
}

/* Resources Section */
.resources {
    background: var(--color-background);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-20);
}

.resource-item {
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
    padding: var(--space-20);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-normal) var(--ease-standard);
}

.resource-item:hover {
    transform: var(--card-hover-transform);
    box-shadow: var(--shadow-lg);
}

.resource-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--color-bg-4);
    border-radius: var(--radius-base);
    color: var(--color-primary);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-16);
}

.resource-info {
    flex: 1;
    margin-bottom: var(--space-16);
}

.resource-info h4 {
    margin-bottom: var(--space-8);
    color: var(--color-text);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.resource-info p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-12);
    line-height: var(--line-height-normal);
}

.resource-meta {
    display: flex;
    gap: var(--space-12);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.file-size,
.download-count {
    padding: var(--space-2) var(--space-6);
    background: var(--color-secondary);
    border-radius: var(--radius-sm);
}

.download-btn {
    margin-top: auto;
}

/* Enhanced Contact Section */
.contact {
    background: var(--color-surface);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-32);
}

.contact-info {
    background: var(--color-background);
    padding: var(--space-24);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-sm);
}

.contact-info h3 {
    margin-bottom: var(--space-20);
    color: var(--color-primary);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-12);
    margin-bottom: var(--space-16);
}

.contact-item i {
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    width: 20px;
    flex-shrink: 0;
}

.response-time,
.collaboration-types {
    margin-top: var(--space-24);
    padding: var(--space-16);
    background: var(--color-bg-3);
    border-radius: var(--radius-base);
}

.response-time h4,
.collaboration-types h4 {
    margin-bottom: var(--space-8);
    color: var(--color-text);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.preferred-methods {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin: 0;
}

.collab-item {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

.collab-item i {
    color: var(--color-primary);
    width: 16px;
}

.contact-form-container {
    background: var(--color-background);
    padding: var(--space-24);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-sm);
}

.contact-form-container h3 {
    margin-bottom: var(--space-20);
    color: var(--color-primary);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

/* Enhanced Footer */
.footer {
    background: var(--color-background);
    border-top: 1px solid var(--color-border);
    padding: var(--space-24) 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin: var(--space-4) 0 0;
}

.footer-links {
    display: flex;
    gap: var(--space-16);
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-standard);
}

.footer-links a:hover {
    color: var(--color-primary);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: var(--space-20);
    right: var(--space-20);
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--duration-normal) var(--ease-standard);
    z-index: 100;
    font-size: var(--font-size-lg);
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Enhanced Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 1;
    visibility: visible;
    transition: all var(--duration-normal) var(--ease-standard);
}

.modal.hidden {
    opacity: 0;
    visibility: hidden;
}

.modal-content {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    max-width: 700px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-lg);
}

.demo-modal .modal-content {
    max-width: 900px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-20);
    border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
    margin: 0;
    color: var(--color-text);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: var(--space-4);
    border-radius: var(--radius-sm);
    transition: color var(--duration-fast) var(--ease-standard);
}

.modal-close:hover {
    color: var(--color-text);
}

.modal-body {
    padding: var(--space-20);
}

.modal-section {
    margin-bottom: var(--space-20);
}

.modal-section h4 {
    margin-bottom: var(--space-12);
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.modal-section p {
    margin-bottom: var(--space-12);
    line-height: var(--line-height-normal);
}

.modal-section ul {
    padding-left: var(--space-20);
    margin-bottom: var(--space-12);
}

.modal-section li {
    margin-bottom: var(--space-8);
    line-height: var(--line-height-normal);
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--animation-duration) var(--ease-standard);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: var(--space-4);
    padding: var(--space-4);
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--color-text);
    transition: 0.3s;
    border-radius: var(--space-2);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Responsive Design */
/* hamburger kept only for mobile ≤768px */


/* ── Desktop nav: compact at medium screen widths ─────────────────── */
/* Hides search bar but keeps ALL nav links visible inline (no hamburger) */
@media (max-width: 1400px) {
    .nav-search {
        display: none;
    }
    .nav-menu {
        gap: 0px;
    }
    .nav-link {
        padding: 6px 6px;
        font-size: 11px;
    }
}

/* Extra tight at 1100px — still no hamburger, just smaller */
@media (max-width: 1100px) {
    .nav-link {
        padding: 5px 5px;
        font-size: 10px;
    }
    .nav-logo .logo-text {
        font-size: 15px;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-search {
        display: none;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: rgba(255, 255, 253, 0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 24px;
        padding-bottom: 40px;
        transform: translateX(-100%);
        transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
        border-top: 1px solid var(--color-border);
        gap: 4px;
        overflow-y: auto;
        z-index: 999;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .visitor-counter {
        top: 80px;
        right: var(--space-12);
        font-size: var(--font-size-xs);
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-20);
    }
    
    .avatar-placeholder {
        width: 200px;
        height: 200px;
        font-size: 80px;
    }
    
    .avatar-ring {
        width: 220px;
        height: 220px;
    }
    
    .hero-stats {
        gap: var(--space-20);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .about-content,
    .research-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--space-20);
    }
    
    .expertise-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid,
    .projects-grid,
    .blog-grid,
    .resources-grid {
        grid-template-columns: 1fr;
    }
    
    .achievement-card {
        flex-direction: column;
        text-align: center;
    }
    
    .achievement-details {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-12);
        text-align: center;
    }
    
    .company-info {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-4);
    }
    
    .project-stats {
        flex-direction: column;
        gap: var(--space-8);
    }
    
    .stat {
        text-align: left;
    }
    
    .project-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero {
        padding-top: 90px;
    }
    
    .name-highlight {
        font-size: var(--font-size-3xl);
    }
    
    .hero-title {
        font-size: var(--font-size-xl);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }
    
    .certificates-grid {
        grid-template-columns: 1fr;
    }
    
    .certificate-item {
        flex-direction: column;
        text-align: center;
        gap: var(--space-12);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-16);
    }
    
    .filter-btn {
        font-size: var(--font-size-xs);
        padding: var(--space-6) var(--space-12);
    }
}

/* Print Styles */
@media print {
    .navbar,
    .visitor-counter,
    .back-to-top,
    .modal {
        display: none;
    }
    
    .hero-particles {
        display: none;
    }
    
    section {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}
/* ── Profile photo in hero ──────────────────────────────────────────── */
.avatar-placeholder.avatar-photo {
    background: transparent;
    overflow: hidden;
    padding: 0;
    font-size: 0;
}

.avatar-placeholder.avatar-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    border-radius: 50%;
    display: block;
}

/* ── Hide breadcrumb bar completely ─────────────────────────────────── */
.breadcrumb {
    display: none !important;
}

/* ═══════════════════════════════════════════════════════════
   SECTION BACKGROUND ENHANCEMENTS
   Each section gets a subtle unique tint/gradient so transitions
   between sections are visually distinct but cohesive
   ═══════════════════════════════════════════════════════════ */

/* section divider line removed */

/* About — warm surface with blue micro-tint */
.about {
    background: linear-gradient(
        180deg,
        var(--color-surface) 0%,
        color-mix(in srgb, var(--color-surface) 97%, var(--color-bg-1) 3%) 100%
    );
}

/* Skills — primary background, subtle teal glow top-right */
.skills {
    background: var(--color-background);
    position: relative;
}
.skills::after {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(var(--color-teal-500-rgb), 0.04) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}
.skills .container { position: relative; z-index: 1; }

/* Projects — surface with warm orange micro-tint */
.projects {
    background: linear-gradient(
        135deg,
        var(--color-surface) 0%,
        color-mix(in srgb, var(--color-surface) 96%, var(--color-bg-6) 4%) 100%
    );
}

/* Experience — background with subtle green micro-tint */
.experience {
    background: linear-gradient(
        180deg,
        var(--color-background) 0%,
        color-mix(in srgb, var(--color-background) 97%, var(--color-bg-3) 3%) 100%
    );
}

/* Certificates — surface with purple micro-tint */
.certificates {
    background: linear-gradient(
        135deg,
        var(--color-surface) 0%,
        color-mix(in srgb, var(--color-surface) 96%, var(--color-bg-5) 4%) 100%
    );
}

/* Achievements — warm accent background */
.achievements {
    background: linear-gradient(
        180deg,
        var(--color-background) 0%,
        color-mix(in srgb, var(--color-background) 95%, var(--color-bg-2) 5%) 100%
    );
}

/* Research — surface with cyan micro-tint */
.research {
    background: linear-gradient(
        135deg,
        var(--color-surface) 0%,
        color-mix(in srgb, var(--color-surface) 96%, var(--color-bg-8) 4%) 100%
    );
}

/* Blog — background with pink micro-tint */
.blog {
    background: linear-gradient(
        180deg,
        var(--color-background) 0%,
        color-mix(in srgb, var(--color-background) 97%, var(--color-bg-7) 3%) 100%
    );
}

/* Testimonials — surface with blue micro-tint */
.testimonials {
    background: linear-gradient(
        135deg,
        var(--color-surface) 0%,
        color-mix(in srgb, var(--color-surface) 96%, var(--color-bg-1) 4%) 100%
    );
}

/* Resources — background with green micro-tint */
.resources {
    background: linear-gradient(
        180deg,
        var(--color-background) 0%,
        color-mix(in srgb, var(--color-background) 96%, var(--color-bg-3) 4%) 100%
    );
}

/* Contact — warm surface */
.contact {
    background: linear-gradient(
        135deg,
        var(--color-surface) 0%,
        color-mix(in srgb, var(--color-surface) 95%, var(--color-bg-4) 5%) 100%
    );
}

/* ── Full inline nav on very large screens (> 1800px) ─────────────────
   Space links evenly so they don't cluster on the right             */
@media (min-width: 1801px) {
    .nav-menu {
        gap: 2px;
    }
    .nav-link {
        font-size: 13px;
        padding: 6px 10px;
    }
    .nav-container {
        gap: 24px;
    }
}

/* Dark mode nav drawer explicit background */
[data-color-scheme="dark"] .nav-menu {
    background-color: rgba(38, 40, 40, 0.98) !important;
}
[data-color-scheme="light"] .nav-menu {
    background-color: rgba(255, 255, 253, 0.98) !important;
}

/* ── Hamburger icon color — visible in both themes ──────────────────── */
[data-color-scheme="light"] .hamburger span {
    background: rgba(19, 52, 59, 1);  /* dark slate — visible on light navbar */
}
[data-color-scheme="dark"] .hamburger span {
    background: rgba(245, 245, 245, 1); /* light — visible on dark navbar */
}

/* ══════════════════════════════════════════════════════════════════
   THEME TOGGLE BUTTON — clean icon button, no browser default box
   ══════════════════════════════════════════════════════════════════ */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1.5px solid var(--color-border);
    background: transparent;
    cursor: pointer;
    padding: 0;
    margin-left: 4px;
    transition: background 150ms ease, border-color 150ms ease, color 150ms ease;
    flex-shrink: 0;
}

.theme-toggle i {
    font-size: 14px;
    pointer-events: none;
}

/* Light mode toggle: dark icon, subtle border */
[data-color-scheme="light"] .theme-toggle {
    color: rgba(19, 52, 59, 1);
    border-color: rgba(94, 82, 64, 0.3);
    background: transparent;
}
[data-color-scheme="light"] .theme-toggle:hover {
    background: rgba(94, 82, 64, 0.08);
}

/* Dark mode toggle: light icon, subtle border */
[data-color-scheme="dark"] .theme-toggle {
    color: rgba(245, 245, 245, 1);
    border-color: rgba(119, 124, 124, 0.3);
    background: transparent;
}
[data-color-scheme="dark"] .theme-toggle:hover {
    background: rgba(119, 124, 124, 0.15);
}

/* ══════════════════════════════════════════════════════════════════
   NAV LINKS — guaranteed visibility in light mode
   Extra specificity to beat any inheritance issues
   ══════════════════════════════════════════════════════════════════ */
html[data-color-scheme="light"] .navbar .nav-link {
    color: rgba(19, 52, 59, 1) !important;
}
html[data-color-scheme="dark"] .navbar .nav-link {
    color: rgba(245, 245, 245, 1) !important;
}

/* Active / hover state — consistent teal across themes */
html[data-color-scheme="light"] .navbar .nav-link:hover,
html[data-color-scheme="light"] .navbar .nav-link.active {
    color: rgba(33, 128, 141, 1) !important;
    background-color: rgba(33, 128, 141, 0.08);
}
html[data-color-scheme="dark"] .navbar .nav-link:hover,
html[data-color-scheme="dark"] .navbar .nav-link.active {
    color: rgba(50, 184, 198, 1) !important;
    background-color: rgba(50, 184, 198, 0.1);
}