:root {
  /* Colors - Light Mode (Default) */
  --color-background: rgba(252, 252, 249, 1);
  --color-surface: rgba(255, 255, 253, 1);
  --color-text: rgba(19, 52, 59, 1);
  --color-text-secondary: rgba(98, 108, 113, 1);
  --color-primary: rgba(33, 128, 141, 1);
  --color-primary-hover: rgba(29, 116, 128, 1);
  --color-primary-active: rgba(26, 104, 115, 1);
  --color-secondary: rgba(94, 82, 64, 0.12);
  --color-secondary-hover: rgba(94, 82, 64, 0.2);
  --color-secondary-active: rgba(94, 82, 64, 0.25);
  --color-border: rgba(94, 82, 64, 0.2);
  --color-btn-primary-text: rgba(252, 252, 249, 1);
  --color-card-border: rgba(94, 82, 64, 0.12);
  --color-card-border-inner: rgba(94, 82, 64, 0.12);
  --color-error: rgba(192, 21, 47, 1);
  --color-success: rgba(33, 128, 141, 1);
  --color-warning: rgba(168, 75, 47, 1);
  --color-info: rgba(98, 108, 113, 1);
  --color-focus-ring: rgba(33, 128, 141, 0.4);
  --color-select-caret: rgba(19, 52, 59, 0.8);

  /* 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;

  /* 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");

  /* 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;

  /* TextileLearn Extended Variables */
  --tl-bg-primary: #FFFFFF;
  --tl-bg-secondary: #F8FAFC;
  --tl-color-primary: #00487A;
  --tl-color-primary-shadow: rgba(0,72,122,0.4);
  --tl-color-primary-hover: #0064AA;
  --tl-color-secondary: #F6A91A;
  --tl-color-secondary-shadow: rgba(246,169,26,0.2);
  --tl-color-accent: #8EDFFF;
  --tl-color-text: #1A2A3A;
  --tl-color-text-light: #626C71;
  --tl-glass-bg: rgba(255, 255, 255, 0.25);
  --tl-glass-border: rgba(255, 255, 255, 0.2);
  --tl-backdrop-blur: blur(15px);
  --tl-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Consolidated Dark Mode - only variables that actually change */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: rgba(31, 33, 33, 1);
    --color-surface: rgba(38, 40, 40, 1);
    --color-text: rgba(245, 245, 245, 1);
    --color-text-secondary: rgba(167, 169, 169, 0.7);
    --color-primary: rgba(50, 184, 198, 1);
    --color-primary-hover: rgba(45, 166, 178, 1);
    --color-primary-active: rgba(41, 150, 161, 1);
    --color-secondary: rgba(119, 124, 124, 0.15);
    --color-secondary-hover: rgba(119, 124, 124, 0.25);
    --color-secondary-active: rgba(119, 124, 124, 0.3);
    --color-border: rgba(119, 124, 124, 0.3);
    --color-error: rgba(255, 84, 89, 1);
    --color-success: rgba(50, 184, 198, 1);
    --color-warning: rgba(230, 129, 97, 1);
    --color-info: rgba(167, 169, 169, 1);
    --color-focus-ring: rgba(50, 184, 198, 0.4);
    --color-btn-primary-text: rgba(19, 52, 59, 1);
    --color-card-border: rgba(119, 124, 124, 0.2);
    --color-card-border-inner: rgba(119, 124, 124, 0.15);
    --color-select-caret: rgba(245, 245, 245, 0.8);
    --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(119, 124, 124, 0.2);
    
    /* RGB versions for dark mode */
    --color-success-rgb: 50, 184, 198;
    --color-error-rgb: 255, 84, 89;
    --color-warning-rgb: 230, 129, 97;
    --color-info-rgb: 167, 169, 169;

    /* TextileLearn Dark Mode */
    --tl-color-primary: #007ACC;
    --tl-bg-primary: #121E2A;
    --tl-bg-secondary: #1A2A3A;
    --tl-color-text: #FFFFFF;
    --tl-color-text-light: #A7A9A9;
    --tl-glass-bg: rgba(18, 30, 42, 0.45);
    --tl-glass-border: rgba(125, 179, 232, 0.3);
  }
  .hero__pattern {
    filter: brightness(40%);
  }
}

[data-color-scheme="dark"] {
  --color-background: rgba(31, 33, 33, 1);
  --color-surface: rgba(38, 40, 40, 1);
  --color-text: rgba(245, 245, 245, 1);
  --color-text-secondary: rgba(167, 169, 169, 0.7);
  --color-primary: rgba(50, 184, 198, 1);
  --color-primary-hover: rgba(45, 166, 178, 1);
  --color-primary-active: rgba(41, 150, 161, 1);
  --color-secondary: rgba(119, 124, 124, 0.15);
  --color-secondary-hover: rgba(119, 124, 124, 0.25);
  --color-secondary-active: rgba(119, 124, 124, 0.3);
  --color-border: rgba(119, 124, 124, 0.3);
  --color-error: rgba(255, 84, 89, 1);
  --color-success: rgba(50, 184, 198, 1);
  --color-warning: rgba(230, 129, 97, 1);
  --color-info: rgba(167, 169, 169, 1);
  --color-focus-ring: rgba(50, 184, 198, 0.4);
  --color-btn-primary-text: rgba(19, 52, 59, 1);
  --color-card-border: rgba(119, 124, 124, 0.2);
  --color-card-border-inner: rgba(119, 124, 124, 0.15);
  --color-select-caret: rgba(245, 245, 245, 0.8);
  --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(119, 124, 124, 0.2);
  
  /* RGB versions for dark mode */
  --color-success-rgb: 50, 184, 198;
  --color-error-rgb: 255, 84, 89;
  --color-warning-rgb: 230, 129, 97;
  --color-info-rgb: 167, 169, 169;

  /* TextileLearn Dark Mode */
  --tl-color-primary: #007ACC;
  --tl-bg-primary: #121E2A;
  --tl-bg-secondary: #1A2A3A;
  --tl-color-text: #FFFFFF;
  --tl-color-text-light: #A7A9A9;
  --tl-glass-bg: rgba(18, 30, 42, 0.45);
  --tl-glass-border: rgba(125, 179, 232, 0.3);
}

[data-color-scheme="dark"] .hero__pattern {
  filter: brightness(40%);
}

/* Explicit light mode override for data-attribute */
[data-color-scheme="light"] {
  --color-background: rgba(252, 252, 249, 1);
  --color-surface: rgba(255, 255, 253, 1);
  --color-text: rgba(19, 52, 59, 1);
  --color-text-secondary: rgba(98, 108, 113, 1);
  --color-primary: rgba(33, 128, 141, 1);
  --color-btn-primary-text: rgba(252, 252, 249, 1);
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;
}

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

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--tl-font-family);
  background-color: var(--tl-bg-primary);
  color: var(--tl-color-text);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

*,
*::before,
*::after {
  box-sizing: inherit;
  margin: 0;
  padding: 0;
}

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

/* Unified Button Component */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-weight: 600;
  line-height: 1.5;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

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

.btn--primary {
  background: var(--tl-color-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(0, 72, 122, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--tl-color-primary-shadow);
}

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

.btn--secondary {
  background: var(--tl-bg-secondary);
  color: var(--tl-color-primary);
  border: 2px solid var(--tl-color-secondary);
  box-shadow: 0 4px 15px var(--tl-color-secondary-shadow);
}

.btn--secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--tl-color-secondary-shadow);
}

.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;
}

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

/* Form elements */
.form-control {
  display: block;
  width: 100%;
  padding: 0.75rem var(--space-12);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--tl-color-text);
  background-color: var(--tl-bg-secondary);
  border: 2px solid var(--tl-color-accent);
  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(--tl-font-family);
  font-size: var(--font-size-base);
}

select.form-control {
  -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);
}

@media (prefers-color-scheme: dark) {
  select.form-control { background-image: var(--select-caret-dark); }
}

[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(--tl-color-primary);
  outline: var(--focus-outline);
  box-shadow: 0 0 0 3px rgba(0, 72, 122, 0.1);
}

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

.form-group { margin-bottom: 1.5rem; }

.form-error {
  color: #dc3545;
  font-size: 0.9rem;
  margin-top: 0.25rem;
  display: block;
}

.form-success {
  display: none;
  background: var(--tl-color-accent);
  color: var(--tl-color-primary);
  padding: 1rem;
  border-radius: 8px;
  margin-top: 1rem;
}

.form-success.show { display: block; }

.form-failed {
  display: none;
  color: var(--color-error);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--color-error);
  margin-top: 1rem;
}

.form-failed.show { display: block; }

.checkbox-wrapper {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.checkbox-wrapper input[type="checkbox"] {
    margin-top: 3px;
    min-width: 16px;
}

.checkbox-label {
    font-size: 0.9em;
    line-height: 1.4;
    cursor: pointer;
}

.checkbox-label:hover {
    color: var(--tl-color-primary-hover);
}

/* 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 */
.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), var(--status-bg-opacity));
  color: var(--color-success);
  border: 1px solid rgba(var(--color-success-rgb), var(--status-border-opacity));
}

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

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

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

/* Container layout - simplified responsive */
.container {
  width: 100%;
  margin: 0 auto;
  padding: 0 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; }

/* Header Styles */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  backdrop-filter: var(--tl-backdrop-blur);
  background: var(--tl-glass-bg);
  border-bottom: 1px solid var(--tl-glass-border);
  transition: all 0.3s ease;
}

.header__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: transform 0.3s ease;
}

.logo:hover {
  transform: scale(1.05);
}

.logo__image {
  height: 2.5rem;
  width: auto;
  border-radius: 4px;
  transition: transform 0.3s ease;
  margin: 0 0.75em;
}

.logo__text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--tl-color-primary);
  margin: 0;
}

.nav__list {
  display: flex;
  list-style: none;
  gap: 2rem;
  margin: 0;
  padding: 0;
}

.nav__link {
  color: var(--tl-color-text);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav__link:hover { color: var(--tl-color-primary); }

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--tl-color-secondary);
  transition: width 0.3s ease;
}

.nav__link:hover::after { width: 100%; }

.header__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: background-color 0.3s ease;
}

.theme-toggle:hover { background-color: var(--tl-color-accent); }

.hamburger {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  gap: 0.25rem;
  position: relative;
  z-index: 1001;
}

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

.hamburger.active .hamburger__line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active .hamburger__line:nth-child(2) { opacity: 0; }
.hamburger.active .hamburger__line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero__header {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__logo {
  height: 200px;
  width: auto;
  margin-bottom: 1.5em;
}

.hero__pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url(hero_background_v2.png);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  z-index: 1;
}

.hero__content { 
  flex: 1;
  padding-right: 2rem;
  position: relative;
  z-index: 2;
  padding: 30px;
  background: var(--tl-glass-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--tl-glass-border);
  backdrop-filter: var(--tl-backdrop-blur);
}

.hero__title {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--tl-color-primary);
  width: 100%;
  text-align: left;
}

.hero__subtitle {
  font-size: 1.25rem;
  color: var(--tl-color-text);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero__visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__ai-visual {
  position: relative;
  width: 300px;
  height: 300px;
}

.ai-brain {
  position: relative;
  width: 100%;
  height: 100%;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.ai-brain__node {
  position: absolute;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--tl-color-primary) 0%, var(--tl-color-secondary) 100%);
  animation: pulse 2s ease-in-out infinite;
}

.ai-brain__node:nth-child(1) { top: 20%; left: 20%; animation-delay: 0s; }
.ai-brain__node:nth-child(2) { top: 20%; right: 20%; animation-delay: 0.7s; }
.ai-brain__node:nth-child(3) {
  bottom: 20%;
  left: 50%;
  transform: translateX(-50%);
  animation-delay: 1.4s;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.ai-brain__connection {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, var(--tl-color-accent), transparent);
  animation: connection-flow 3s ease-in-out infinite;
}

.ai-brain__connection:nth-child(4) {
  top: 35%;
  left: 35%;
  width: 80px;
  transform: rotate(45deg);
}

.ai-brain__connection:nth-child(5) {
  bottom: 35%;
  left: 25%;
  width: 100px;
  transform: rotate(-30deg);
}

@keyframes connection-flow {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* Section Styles */
section { padding: 5rem 0; }

.section__header {
  text-align: center;
  margin-bottom: 3rem;
}

.section__title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--tl-color-primary);
}

.section__subtitle {
  font-size: 1.2rem;
  color: var(--tl-color-text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* About Section */
.about { background: var(--tl-bg-secondary); }

.about p, .about ul {
  color: var(--tl-color-text-light);
}

.about__content { display: grid; gap: 3rem; }

.about__mission, .about__profile { text-align: center; }

.about__mission h3, .about__profile h3 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  color: var(--tl-color-primary);
}

.about__mission p {
  font-size: 1.1rem;
  line-height: 1.8;
  max-width: 800px;
  margin: 0 auto;
}

.facts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.fact-card {
  background: var(--tl-bg-primary);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.fact-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.fact-card h4 {
  color: var(--tl-color-primary);
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.fact-card ul {
  list-style: none;
  padding: 0;
}

.fact-card li {
  padding: 0.3rem 0;
  position: relative;
  padding-left: 1.5rem;
}

.fact-card li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--tl-color-secondary);
  font-weight: bold;
}

.fact-card img {
  display: block;
  margin: 0 auto;
  width: 70%;
  height: auto;
}

/* Team Section */
.team__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.team-card {
  background: var(--tl-bg-secondary);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.team-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.team-card__avatar { margin-bottom: 1.5rem; }

.avatar-placeholder, .avatar {
  width: 100px;
  height: 100px;
  object-fit: cover;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--tl-color-primary) 0%, var(--tl-color-secondary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: white;
  font-size: 1.5rem;
  margin: 0 auto;
}

.team-card__name {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: var(--tl-color-primary);
}

.team-card__position {
  color: var(--tl-color-secondary);
  font-weight: 600;
  margin-bottom: 1rem;
}

.team-card__bio {
  color: var(--tl-color-text-light);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.team-card__contacts {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--tl-color-accent);
  text-decoration: none;
  font-size: 1.2rem;
  transition: all 0.3s ease;
}

.contact-icon:hover {
  background: var(--tl-color-secondary);
  transform: scale(1.1);
}

/* News Section */
.news { background: var(--tl-bg-secondary); }

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

.accordion__item {
  background: var(--tl-bg-primary);
  border-radius: 12px;
  margin-bottom: 1rem;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.accordion__header {
  width: 100%;
  padding: 1.5rem;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background-color 0.3s ease;
}

.accordion__header:hover { background: var(--tl-bg-secondary); }

.accordion__title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--tl-color-primary);
  flex: 1;
}

.accordion__date {
  color: var(--tl-color-text-light);
  font-size: 0.9rem;
  margin-right: 1rem;
}

.accordion__icon {
  font-size: 1.5rem;
  color: var(--tl-color-secondary);
  transition: transform 0.3s ease;
}

.accordion__item.active .accordion__icon { transform: rotate(45deg); }

.accordion__content {
  padding: 0 1.5rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.accordion__item.active .accordion__content {
  max-height: 200px;
  padding: 0 1.5rem 1.5rem 1.5rem;
}

.accordion__content p {
  color: var(--tl-color-text-light);
  line-height: 1.6;
  margin: 0;
}

/* Contact Section */
.contact__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 1000px;
  margin: 0 auto;
}

.contact__form {
  background: var(--tl-bg-secondary);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.contact__addresses h3 {
  color: var(--tl-color-primary);
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.address-card {
  display: block;
  background: var(--tl-bg-secondary);
  padding: 1.5rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.address-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.address-card h4 {
  color: var(--tl-color-primary);
  margin-bottom: 0.5rem;
}

.address-card p {
  color: var(--tl-color-text-light);
  margin: 0;
}

/* Funded Section */
.funded {
  background: var(--tl-bg-secondary);
}

.funded .address-card {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background: var(--tl-bg-primary);
}

.funded__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 1000px;
  margin: 0 auto;
}

.funded__logo {
  max-width: 100%;
  height: auto;
}

/* Footer */
.footer {
  background: rgb(0,72,122);
  color: white;
  padding: 3rem 0 1rem;
}

.footer__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.footer__brand h3 {
  color: white;
  margin-bottom: 0.5rem;
}

.footer__brand p {
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
}

.footer__links {
  display: flex;
  gap: 2rem;
}

.footer__links a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer__links a:hover { color: var(--tl-color-secondary); }

.footer__bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer__bottom p {
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
}

/* 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,
*:focus-visible {
  outline: 3px solid var(--tl-color-secondary);
  outline-offset: 2px;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in { animation: fadeIn 0.8s ease-out; }

/* Responsive Design */
@media (max-width: 768px) {

  .nav {
    position: fixed;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--tl-glass-bg);
    backdrop-filter: var(--tl-backdrop-blur);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    padding: 2rem 0;
    z-index: 999;
  }

.nav::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--tl-glass-bg);
  backdrop-filter: var(--tl-backdrop-blur);
  z-index: -1;
}

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

  .nav__list {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }

  .hamburger { display: flex; }

  .hero__title { font-size: 2.5rem; }
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero__visual { display: none; }

  .contact__content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer__content {
    flex-direction: column;
    gap: 2rem;
    text-align: center;
  }

  .footer__links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .hero__title { font-size: 2rem; }
  .section__title { font-size: 2rem; }
  .facts-grid { grid-template-columns: 1fr; }
  .team__grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}