:root {
  --navbar-bg-rgb: 252, 252, 249;
  --navbar-border-rgb: 94, 82, 64;
  /* 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 {
    --navbar-bg-rgb: 26, 26, 26;
    --navbar-border-rgb: 255, 255, 255;
    /* 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"] {
  --navbar-bg-rgb: 26, 26, 26;
  --navbar-border-rgb: 255, 255, 255;
  /* 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"] {
  --navbar-bg-rgb: 252, 252, 249;
  --navbar-border-rgb: 94, 82, 64;
  /* 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 */
/* Portfolio-specific styles */

/* Custom color variables for the portfolio */
:root {
  --portfolio-primary: #00d4ff;
  --portfolio-primary-hover: #00b8e6;
  --portfolio-dark: #1a1a1a;
  --portfolio-dark-secondary: #2a2a2a;
  --portfolio-light: #f8f9fa;
  --portfolio-text-light: rgba(248, 249, 250, 0.9);
  --portfolio-text-secondary: rgba(248, 249, 250, 0.7);
  --portfolio-border: rgba(255, 255, 255, 0.1);
}

/* Override design system for dark theme */
[data-color-scheme="dark"] {
  --color-background: var(--portfolio-dark);
  --color-surface: var(--portfolio-dark-secondary);
  --color-text: var(--portfolio-text-light);
  --color-text-secondary: var(--portfolio-text-secondary);
  --color-primary: var(--portfolio-primary);
  --color-primary-hover: var(--portfolio-primary-hover);
  --color-border: var(--portfolio-border);
  --color-btn-primary-text: var(--portfolio-dark);
}

/* Global styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Utility classes */
.text-primary {
  color: var(--color-primary);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-20);
}

.section-title {
  font-size: var(--font-size-4xl);
  text-align: center;
  margin-bottom: var(--space-32);
  position: relative;
}

.section-title::after {
  content: '';
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), transparent);
  display: block;
  margin: var(--space-16) auto 0;
}

/* Loading spinner */
.loading-spinner {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-background);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  transition: opacity 0.5s ease;
}

.loading-spinner.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top: 3px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(var(--navbar-bg-rgb), var(--navbar-opacity, 0));
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  transition: background 0.3s ease, border-bottom 0.3s ease, color 0.3s ease;
  border-bottom: 1px solid rgba(var(--navbar-border-rgb), var(--navbar-opacity, 0));
  padding-top: env(safe-area-inset-top, 0px);
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-20);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-brand {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-32);
}

.nav-link {
  color: var(--color-text);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: color 0.3s ease;
  position: relative;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
}

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

.theme-toggle {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: var(--space-8);
  border-radius: var(--radius-base);
  cursor: pointer;
  font-size: var(--font-size-lg);
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  background: var(--color-secondary);
  border-color: var(--color-primary);
}

.hamburger {
  display: none;
  flex-direction: column;
  background: transparent;
  border: none;
  cursor: pointer;
  gap: 4px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--color-text);
  transition: all 0.3s ease;
}

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

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

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: calc(70px + env(safe-area-inset-top, 0px));
  background: linear-gradient(135deg, var(--color-background) 0%, var(--color-surface) 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-32);
  align-items: center;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-16);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: var(--font-size-2xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-24);
  min-height: 40px;
  display: flex;
  align-items: center;
}

.typing-text {
  color: var(--color-primary);
  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-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-32);
  max-width: 500px;
}

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

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


.hero-avatar {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  border: 4px solid #00d4ff;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  background: #222;
  animation: float 3s ease-in-out infinite;
}

.avatar-img {
  width: 100%;
  /* Make image fit frame width */
  height: 100%;
  /* Make image fit frame height */
  object-fit: cover;
  /* Crop the image to fill the frame */
  border-radius: 50%;
  /* Makes the image itself a circle */
  display: block;
}


.avatar-placeholder {
  font-size: 4rem;
  font-weight: var(--font-weight-bold);
  color: var(--portfolio-dark);
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0px);
  }

  50% {
    transform: translateY(-20px);
  }
}


/* About Section */
.about {
  padding: 100px 0;
  background: var(--color-surface);
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-text p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-32);
  line-height: 1.8;
}

.skills-section h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-24);
  color: var(--color-text);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-16);
  max-width: 600px;
  margin: 0 auto;
}

.skill-item {
  background: var(--color-background);
  padding: var(--space-16);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: all 0.3s ease;
  cursor: default;
}

.skill-item:hover {
  transform: translateY(-5px);
  border-color: var(--color-primary);
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.1);
}

/* Projects Section */
.projects {
  padding: 100px 0;
  background: var(--color-background);
}

.projects-category-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-top: var(--space-32);
  margin-bottom: var(--space-24);
  position: relative;
  padding-left: var(--space-16);
}

.projects-category-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 20px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-32);
}

.project-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 40px rgba(0, 212, 255, 0.15);
  border-color: var(--color-primary);
}

.project-image-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-16);
  transition: border-color 0.3s ease;
}

.project-card:hover .project-image-wrapper {
  border-color: var(--color-primary);
}

.project-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.project-card:hover .project-image {
  transform: scale(1.03);
}

.project-content {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-12);
}

.project-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  line-height: 1.3;
}

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

.project-description {
  color: var(--color-text-secondary);
  line-height: 1.6;
  font-size: var(--font-size-base);
  margin-bottom: var(--space-20);
  flex-grow: 1;
}

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

.tech-tag {
  background: rgba(0, 212, 255, 0.1);
  color: var(--color-primary);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.project-links {
  display: flex;
  gap: var(--space-12);
  align-items: center;
}

.project-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  transition: opacity 0.3s ease;
}

.project-link:hover {
  opacity: 0.8;
}

.project-link-placeholder {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-style: italic;
  opacity: 0.8;
}

/* Experience Section */
.experience {
  padding: 100px 0;
  background: var(--color-background);
}

.timeline {
  max-width: 850px;
  margin: 0 auto;
  position: relative;
  padding: var(--space-20) 0;
}

/* Animated Neon Center Line */
.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(to bottom, rgba(0, 212, 255, 0.1), var(--color-primary), rgba(0, 212, 255, 0.1));
  transform: translateX(-50%);
  border-radius: var(--radius-full);
}

/* Glowing Flowing Data Packet */
.timeline::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  width: 4px;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--color-primary), transparent);
  transform: translateX(-50%);
  animation: timeline-packet-flow 6s cubic-bezier(0.25, 1, 0.5, 1) infinite;
  pointer-events: none;
  z-index: 1;
}

@keyframes timeline-packet-flow {
  0% {
    top: 0%;
  }
  100% {
    top: 100%;
  }
}

.timeline-item {
  margin-bottom: var(--space-32);
  position: relative;
  width: 100%;
}

.timeline-item.odd .timeline-content {
  margin-left: calc(50% + 35px);
}

.timeline-item.even .timeline-content {
  margin-right: calc(50% + 35px);
}

.timeline-marker {
  position: absolute;
  left: 50%;
  top: 24px;
  width: 20px;
  height: 20px;
  background: var(--color-background);
  border: 3px solid var(--color-primary);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 10px rgba(0, 212, 255, 0.4);
  z-index: 2;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.timeline-item:hover .timeline-marker {
  background: var(--color-primary);
  box-shadow: 0 0 20px var(--color-primary);
  transform: translateX(-50%) scale(1.25);
}

.timeline-content {
  background: var(--color-surface);
  padding: var(--space-24);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-primary);
  box-shadow: var(--shadow-sm);
  transition: all 0.4s var(--ease-standard);
  position: relative;
  overflow: hidden;
}

.timeline-content::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.03) 0%, transparent 100%);
  pointer-events: none;
}

.timeline-content:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 45px rgba(0, 212, 255, 0.12);
  border-color: rgba(0, 212, 255, 0.4);
  border-top-color: var(--color-primary);
}

/* Header layout block with logo and title info */
.timeline-header-block {
  display: flex;
  align-items: center;
  gap: var(--space-16);
  margin-bottom: var(--space-16);
}

.company-logo {
  flex-shrink: 0;
  width: 70px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  padding: var(--space-4);
}

.timeline-content:hover .company-logo {
  border-color: var(--color-primary);
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.2);
}

.logo-img {
  max-width: 90%;
  max-height: 80%;
  object-fit: contain;
}

.timeline-title-info {
  display: flex;
  flex-direction: column;
}

.timeline-company {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  line-height: 1.2;
}

.timeline-position {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-top: var(--space-2);
}

.timeline-department {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-style: italic;
  margin-top: var(--space-2);
}

.timeline-duration-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-12);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-16);
  width: fit-content;
}

.timeline-description {
  color: var(--color-text-secondary);
}

.timeline-description-list {
  list-style: none;
  padding-left: 0;
  margin-top: var(--space-8);
}

.timeline-description-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
  line-height: 1.6;
}

.list-bullet {
  color: var(--color-primary);
  font-family: var(--font-family-mono);
  font-weight: var(--font-weight-bold);
  user-select: none;
  font-size: var(--font-size-sm);
}

.list-text {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
}

/* Certifications Section */
.certifications {
  padding: 100px 0;
  background: var(--color-background);
}

.certifications-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-12);
  margin-bottom: var(--space-32);
}

.tab-btn {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  padding: var(--space-8) var(--space-20);
  border-radius: var(--radius-full);
  cursor: pointer;
  font-family: var(--font-family-base);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all 0.3s ease;
}

.tab-btn:hover {
  background: var(--color-secondary);
  color: var(--color-text);
  border-color: var(--color-primary);
}

.tab-btn.active {
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
  border-color: var(--color-primary);
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.3);
}

.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-24);
}

.certification-card {
  background: var(--color-surface);
  padding: var(--space-20);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-16);
  text-align: left;
  transition: all 0.3s ease;
}

.certification-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 212, 255, 0.1);
  border-color: var(--color-primary);
}

.certification-card-content {
  display: flex;
  align-items: center;
  gap: var(--space-16);
  width: 100%;
}

.certification-logo-wrapper {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  padding: var(--space-6);
  transition: all 0.3s ease;
}

.certification-card:hover .certification-logo-wrapper {
  background: rgba(0, 212, 255, 0.05);
  border-color: rgba(0, 212, 255, 0.3);
}

.cert-logo-svg {
  width: 100%;
  height: 100%;
  max-width: 32px;
  max-height: 32px;
  object-fit: contain;
}

.certification-info {
  display: flex;
  flex-direction: column;
}

.certification-name {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  line-height: 1.3;
}

.certification-issuer {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-2);
}

.certification-date {
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
}

/* Activities Section */
.activities {
  padding: 100px 0;
  background: var(--color-surface);
}

.activities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-24);
}

.activity-card {
  background: var(--color-background);
  padding: var(--space-24);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  transition: all 0.3s ease;
}

.activity-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 212, 255, 0.1);
  border-color: var(--color-primary);
}

.activity-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-8);
}

.activity-org {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-md);
  margin-bottom: var(--space-4);
}

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

.activity-desc {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Contact Section */
.contact {
  padding: 100px 0;
  background: var(--color-surface);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-32);
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-24);
  color: var(--color-text);
}

.contact-item {
  margin-bottom: var(--space-16);
  color: var(--color-text-secondary);
}

.contact-item strong {
  color: var(--color-text);
  display: block;
  margin-bottom: var(--space-4);
}

.contact-item a {
  color: var(--color-primary);
  text-decoration: none;
}

.contact-item a:hover {
  opacity: 0.8;
}

.social-links {
  margin-top: var(--space-32);
  display: flex;
  gap: var(--space-16);
}

.social-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: opacity 0.3s ease;
}

.social-link:hover {
  opacity: 0.8;
}

.contact-form {
  background: var(--color-background);
  padding: var(--space-32);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

/* Footer */
.footer {
  background: var(--portfolio-dark);
  padding: var(--space-32) 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.footer-content {
  color: var(--color-text-secondary);
}

.footer-content p:first-child {
  margin-bottom: var(--space-8);
}

/* Scroll to top button */
.scroll-top {
  position: fixed;
  bottom: calc(30px + env(safe-area-inset-bottom, 0px));
  right: calc(30px + env(safe-area-inset-right, 0px));
  width: 50px;
  height: 50px;
  background: var(--color-primary);
  color: var(--portfolio-dark);
  border: none;
  border-radius: 50%;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 1000;
}

.scroll-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 212, 255, 0.3);
}

.scroll-top.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: calc(70px + env(safe-area-inset-top, 0px));
    left: -100%;
    width: 100%;
    height: calc(100vh - (70px + env(safe-area-inset-top, 0px)));
    height: calc(100dvh - (70px + env(safe-area-inset-top, 0px)));
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: var(--space-32);
    padding-bottom: env(safe-area-inset-bottom, var(--space-32));
    padding-left: env(safe-area-inset-left, var(--space-16));
    padding-right: env(safe-area-inset-right, var(--space-16));
    transition: left 0.3s ease;
  }

  .nav-menu.active {
    left: 0;
  }

  .hamburger {
    display: flex;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-visual {
    order: -1;
  }

  .hero-avatar {
    width: 200px;
    height: 200px;
  }

  .avatar-placeholder {
    font-size: 3rem;
  }

  .timeline::before,
  .timeline::after {
    left: 20px;
    transform: none;
  }

  .timeline-item.odd .timeline-content,
  .timeline-item.even .timeline-content {
    margin-left: 45px;
    margin-right: 0;
    text-align: left;
  }

  .timeline-marker {
    left: 20px;
    transform: translateX(-50%);
  }

  .timeline-item:hover .timeline-marker {
    transform: translateX(-50%) scale(1.2);
  }

  .contact-content {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 var(--space-16);
  }

  .hero-buttons {
    justify-content: center;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .activities-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: var(--font-size-lg);
  }

  .section-title {
    font-size: var(--font-size-3xl);
  }
}


/* =========================================
   Project Details Modal Component (Universal Resolution)
   ========================================= */
.project-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: max(1.25rem, env(safe-area-inset-top)) max(1.25rem, env(safe-area-inset-right)) max(1.25rem, env(safe-area-inset-bottom)) max(1.25rem, env(safe-area-inset-left));
  opacity: 1;
  visibility: visible;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.project-modal-backdrop.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.project-modal-dialog {
  position: relative;
  background: var(--color-surface, #1e1e1e);
  color: var(--color-text, #f5f5f5);
  width: 100%;
  max-width: 920px;
  max-height: 88vh;
  max-height: 88dvh;
  border-radius: 16px;
  border: 1px solid var(--color-border, rgba(255, 255, 255, 0.15));
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6), 0 0 35px rgba(0, 212, 255, 0.15);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalSlideUp 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalSlideUp {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.project-modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 40px;
  height: 40px;
  min-width: 40px;
  min-height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--color-border, rgba(255, 255, 255, 0.15));
  color: var(--color-text, #fff);
  font-size: 1.5rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all 0.2s ease;
  touch-action: manipulation;
}

.project-modal-close:hover,
.project-modal-close:focus-visible {
  background: rgba(0, 212, 255, 0.2);
  color: var(--portfolio-primary, #00d4ff);
  transform: rotate(90deg);
  outline: none;
}

.project-modal-header {
  position: relative;
  padding: 1.75rem 3.5rem 1.25rem 1.75rem;
  border-bottom: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
  background: linear-gradient(180deg, rgba(0, 212, 255, 0.06) 0%, rgba(0, 0, 0, 0) 100%);
}

.project-modal-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--portfolio-primary, #00d4ff);
  background: rgba(0, 212, 255, 0.12);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 20px;
  margin-bottom: 0.65rem;
}

.project-modal-title {
  font-size: 1.65rem;
  font-weight: 700;
  margin: 0 0 0.4rem 0;
  color: var(--color-text, #fff);
  line-height: 1.25;
  padding-right: 0.5rem;
  word-break: break-word;
}

.project-modal-subtitle {
  font-size: 0.92rem;
  color: var(--color-text-secondary, #a1a1aa);
  margin: 0;
  line-height: 1.5;
}

.project-modal-body {
  padding: 1.75rem;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 212, 255, 0.3) transparent;
}

.project-modal-body::-webkit-scrollbar {
  width: 6px;
}

.project-modal-body::-webkit-scrollbar-thumb {
  background: rgba(0, 212, 255, 0.3);
  border-radius: 3px;
}

.modal-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.modal-section-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--portfolio-primary, #00d4ff);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid rgba(0, 212, 255, 0.15);
}

.modal-text-content {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--color-text, #e4e4e7);
  margin: 0;
}

.modal-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 10px;
  border: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
  background: rgba(0, 0, 0, 0.15);
  position: relative;
}

.modal-table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}

.modal-table th {
  background: rgba(0, 212, 255, 0.1);
  color: var(--portfolio-primary, #00d4ff);
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border, rgba(255, 255, 255, 0.12));
  white-space: nowrap;
}

.modal-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border, rgba(255, 255, 255, 0.05));
  color: var(--color-text, #e4e4e7);
  vertical-align: top;
  line-height: 1.5;
}

.modal-table tr:last-child td {
  border-bottom: none;
}

.modal-table tr:hover td {
  background: rgba(255, 255, 255, 0.03);
}

.modal-highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.modal-highlight-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border, rgba(255, 255, 255, 0.08));
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.modal-highlight-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text, #fff);
  margin: 0;
}

.modal-highlight-list {
  margin: 0;
  padding-left: 1.2rem;
  font-size: 0.88rem;
  color: var(--color-text-secondary, #a1a1aa);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  line-height: 1.5;
}

.modal-tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.modal-tag {
  background: rgba(0, 212, 255, 0.08);
  color: var(--portfolio-primary, #00d4ff);
  border: 1px solid rgba(0, 212, 255, 0.2);
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
}

.project-modal-footer {
  padding: 1.1rem 1.75rem;
  border-top: 1px solid var(--color-border, rgba(255, 255, 255, 0.1));
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.85rem;
  background: rgba(0, 0, 0, 0.2);
}

.btn-details {
  background: transparent;
  color: var(--portfolio-primary, #00d4ff);
  border: 1px solid rgba(0, 212, 255, 0.4);
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  touch-action: manipulation;
}

.btn-details:hover,
.btn-details:focus-visible {
  background: rgba(0, 212, 255, 0.15);
  border-color: var(--portfolio-primary, #00d4ff);
  transform: translateY(-1px);
}

/* Tablet Resolution (Tabs, iPad Mini / Pro, Surface) */
@media (max-width: 1023px) and (min-width: 768px) {
  .project-modal-dialog {
    max-height: 90vh;
    max-height: 90dvh;
    width: 94%;
  }
  .modal-highlights-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Smartphone Resolution (iPhone & Android Phones - Portrait & Landscape) */
@media (max-width: 767px) {
  .project-modal-backdrop {
    padding: max(0.65rem, env(safe-area-inset-top)) max(0.65rem, env(safe-area-inset-right)) max(0.65rem, env(safe-area-inset-bottom)) max(0.65rem, env(safe-area-inset-left));
  }

  .project-modal-dialog {
    max-height: 92vh;
    max-height: 92dvh;
    border-radius: 14px;
  }

  .project-modal-close {
    top: 0.85rem;
    right: 0.85rem;
    width: 38px;
    height: 38px;
    min-width: 38px;
    min-height: 38px;
  }

  .project-modal-header {
    padding: 1.25rem 3.25rem 1rem 1.25rem;
  }

  .project-modal-title {
    font-size: 1.35rem;
  }

  .project-modal-subtitle {
    font-size: 0.85rem;
  }

  .project-modal-body {
    padding: 1.25rem;
    gap: 1.35rem;
  }

  .modal-section-title {
    font-size: 1rem;
  }

  .modal-text-content {
    font-size: 0.88rem;
  }

  .modal-highlights-grid {
    grid-template-columns: 1fr;
  }

  .modal-highlight-card {
    padding: 0.9rem 1rem;
  }

  .modal-table {
    min-width: 480px;
    font-size: 0.82rem;
  }

  .modal-table th,
  .modal-table td {
    padding: 0.6rem 0.75rem;
  }

  .project-modal-footer {
    padding: 1rem 1.25rem;
    flex-direction: column-reverse;
    gap: 0.65rem;
  }

  .project-modal-footer .btn {
    width: 100%;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 0.9rem;
  }
}

/* Extra Small Smartphone Resolution (iPhone SE, Small Androids < 380px) */
@media (max-width: 380px) {
  .project-modal-title {
    font-size: 1.2rem;
  }

  .project-modal-header {
    padding: 1rem 3rem 0.85rem 1rem;
  }

  .project-modal-body {
    padding: 1rem;
  }

  .modal-table {
    min-width: 420px;
    font-size: 0.78rem;
  }
}