/* ============================================
   Academy Lab — Design System v3
   Unified. Consistent. Minimal.
   Tokens: Sapphire / Electric / Sunset
   ============================================ */

/* ==========================================
   1. DESIGN TOKENS
   ========================================== */
:root {
  --color-primary:        #1e3a8a;
  --color-primary-light:  #3b82f6;
  --color-primary-dark:   #1e293b;
  --color-secondary:      #06b6d4;
  --color-secondary-light:#22d3ee;
  --color-secondary-dark: #0891b2;
  --color-accent:         #f97316;
  --color-accent-light:   #fb923c;
  --color-accent-dark:    #ea580c;

  --color-bg:             #fafafa;
  --color-bg-alt:         #f8fafc;
  --color-surface:        #ffffff;
  --color-surface-hover:  #f1f5f9;
  --color-border:         #e2e8f0;
  --color-border-light:   #f1f5f9;

  --color-text:           #121212;
  --color-text-secondary: #475569;
  --color-text-muted:     #94a3b8;
  --color-text-inverse:   #ffffff;

  --font-body:    'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Poppins', system-ui, -apple-system, sans-serif;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  --weight-regular:   400;
  --weight-medium:    500;
  --weight-semibold:  600;
  --weight-bold:      700;
  --weight-extrabold: 800;

  --leading-tight:   1.1;
  --leading-normal:  1.5;
  --leading-relaxed: 1.7;

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --section-padding-y: 5rem;

  --shadow-sm:   0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md:   0 4px 6px rgba(15, 23, 42, 0.05), 0 1px 3px rgba(15, 23, 42, 0.04);
  --shadow-lg:   0 10px 15px rgba(15, 23, 42, 0.06), 0 4px 6px rgba(15, 23, 42, 0.04);
  --shadow-xl:   0 20px 25px rgba(15, 23, 42, 0.08), 0 8px 10px rgba(15, 23, 42, 0.04);
  --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-card-hover: 0 20px 40px rgba(15, 23, 42, 0.08), 0 4px 12px rgba(15, 23, 42, 0.04);

  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-2xl:  1.25rem;
  --radius-full: 9999px;

  --ease-default: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring:  0.3s cubic-bezier(0.4, 0, 0.2, 1);

  --glass-bg:     rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.25);
  --glass-blur:   12px;
}

html.dark {
  --color-bg:             #0f172a;
  --color-bg-alt:         #1a2332;
  --color-surface:        #1e293b;
  --color-surface-hover:  #334155;
  --color-border:         #334155;
  --color-border-light:   #1e293b;
  --color-text:           #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-muted:     #64748b;
  --shadow-sm:   0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md:   0 4px 6px rgba(0, 0, 0, 0.25);
  --shadow-lg:   0 10px 15px rgba(0, 0, 0, 0.3);
  --shadow-xl:   0 20px 25px rgba(0, 0, 0, 0.35);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-card-hover: 0 20px 40px rgba(0, 0, 0, 0.3);
  --glass-bg:     rgba(15, 23, 42, 0.72);
  --glass-border: rgba(255, 255, 255, 0.08);
}

html.dark .section-tag {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text-secondary);
}

html.dark .badge-primary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-secondary);
}

html.dark .mobile-nav-link.is-active,
html.dark .mobile-nav-link.is-active i:first-child {
  color: var(--color-text);
}

html.dark .mobile-nav-sub-link.is-active {
  color: var(--color-text);
}

html.dark .stat-number {
  background-image: linear-gradient(135deg, var(--color-secondary-light), var(--color-secondary));
}

@media (min-width: 768px) {
  :root { --section-padding-y: 7rem; }
}

/* ==========================================
   2. BASE & RESET
   ========================================== */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
  border-radius: 0.25rem;
}

::selection {
  background: rgba(6, 182, 212, 0.2);
  color: var(--color-text);
}

/* ==========================================
   3. LAYOUT
   ========================================== */
.container-main {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 640px) { .container-main { padding: 0 var(--space-6); } }
@media (min-width: 1024px) { .container-main { padding: 0 var(--space-8); } }

.section { padding: var(--section-padding-y) 0; }
.section-alt { background-color: var(--color-bg-alt); }

/* ==========================================
   4. TYPOGRAPHY
   ========================================== */
.font-display { font-family: var(--font-display); letter-spacing: -0.02em; }

h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); color: var(--color-text); }

.heading-1 {
  font-weight: var(--weight-extrabold);
  font-size: var(--text-4xl);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.heading-2 {
  font-weight: var(--weight-bold);
  font-size: var(--text-2xl);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.heading-3 {
  font-weight: var(--weight-semibold);
  font-size: var(--text-xl);
  line-height: 1.2;
}

.heading-4 {
  font-weight: var(--weight-semibold);
  font-size: var(--text-lg);
  line-height: 1.25;
}

@media (min-width: 768px) {
  .heading-1 { font-size: var(--text-5xl); }
  .heading-2 { font-size: var(--text-3xl); }
  .heading-3 { font-size: var(--text-2xl); }
}

.text-body {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
}

.text-body-lg {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
}

.text-muted { color: var(--color-text-muted); }

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.375rem 1rem;
  background: rgba(30, 58, 138, 0.1);
  color: var(--color-primary);
  font-size: 0.6875rem;
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ==========================================
   5. NAVBAR
   ========================================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  transition: background var(--ease-default), box-shadow var(--ease-default);
}

.navbar.is-transparent { background: transparent; box-shadow: none; }

/* All pages: white text on transparent navbar (header has dark gradient bg) */
.navbar.is-transparent #brand-text,
.navbar.is-transparent #brand-subtext,
.navbar.is-transparent .mobile-menu-btn {
  color: white;
}
.navbar.is-transparent .theme-toggle {
  color: white;
  background: rgba(255,255,255,0.15);
}

/* Homepage specific: links white on transparent */
.navbar-home.is-transparent .nav-link,
.navbar-home.is-transparent .nav-link.is-active,
.navbar-home.is-transparent .nav-link:hover { color: white; }
.navbar-home.is-transparent .nav-link { color: rgba(255,255,255,0.9); }
.navbar-home.is-transparent .nav-link.is-active,
.navbar-home.is-transparent .nav-link:hover { color: var(--color-accent); }

/* Inner pages: orange hover on transparent navbar (overrides inline hover:text-electric) */
.navbar.is-transparent .nav-link:hover { color: var(--color-accent); }

.navbar.is-scrolled {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
}

/* Scrolled navbar: dark text in light mode */
.navbar.is-scrolled .nav-link,
.navbar.is-scrolled #brand-text,
.navbar.is-scrolled #brand-subtext,
.navbar.is-scrolled .mobile-menu-btn {
  color: var(--color-text);
}
.navbar.is-scrolled .nav-link,
.navbar.is-scrolled .nav-link.is-active,
.navbar.is-scrolled .nav-link:hover { color: var(--color-text); }
.navbar.is-scrolled .theme-toggle {
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
}

html.dark .navbar.is-scrolled .nav-link,
html.dark .navbar.is-scrolled #brand-text,
html.dark .navbar.is-scrolled #brand-subtext,
html.dark .navbar.is-scrolled .mobile-menu-btn {
  color: white;
}
html.dark .navbar.is-scrolled .nav-link { color: rgba(255,255,255,0.9); }
html.dark .navbar.is-scrolled .nav-link.is-active,
html.dark .navbar.is-scrolled .nav-link:hover { color: var(--color-accent); }
html.dark .navbar.is-scrolled .theme-toggle {
  color: white;
  background: rgba(255,255,255,0.15);
}

.navbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4.5rem;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.navbar-logo {
  width: 2.75rem;
  height: 2.75rem;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  font-size: var(--text-lg);
  color: white;
  transition: transform var(--ease-default);
  box-shadow: var(--shadow-lg);
}

.navbar-brand:hover .navbar-logo { transform: scale(1.02); }

.navbar-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  position: relative;
  font-weight: var(--weight-medium);
  font-size: var(--text-sm);
  padding: var(--space-2) 0;
  transition: color var(--ease-default);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--color-accent);
  transition: width var(--ease-default);
}

.nav-link:hover::after,
.nav-link.is-active::after { width: 100%; }

.nav-link.is-active { color: var(--color-accent); }

.theme-toggle {
  width: 2.5rem; height: 2.5rem;
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, 0.15);
  border: none; cursor: pointer;
  color: white;
  transition: background var(--ease-default);
}

.theme-toggle:hover { background: rgba(255, 255, 255, 0.25); }

html.dark .theme-toggle { background: rgba(255, 255, 255, 0.1); }

.admin-login-btn {
  width: 2.5rem; height: 2.5rem;
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, 0.15);
  color: white;
  text-decoration: none;
  transition: background var(--ease-default);
}
.admin-login-btn:hover { background: rgba(255, 255, 255, 0.25); }
html.dark .admin-login-btn { background: rgba(255, 255, 255, 0.1); }
html.dark .admin-login-btn:hover { background: rgba(255, 255, 255, 0.2); }
.navbar.is-scrolled .admin-login-btn {
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
}
.navbar.is-scrolled .admin-login-btn:hover { color: var(--color-primary); }

.lang-switch-btn {
  width: 2.5rem; height: 2.5rem;
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, 0.15);
  color: white;
  text-decoration: none;
  transition: background var(--ease-default);
}
.lang-switch-btn:hover { background: rgba(255, 255, 255, 0.25); }
html.dark .lang-switch-btn { background: rgba(255, 255, 255, 0.1); }
html.dark .lang-switch-btn:hover { background: rgba(255, 255, 255, 0.2); }
.navbar.is-scrolled .lang-switch-btn {
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
}
.navbar.is-scrolled .lang-switch-btn:hover { color: var(--color-primary); }

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
html.dark .theme-toggle .icon-sun { display: block; }
html.dark .theme-toggle .icon-moon { display: none; }

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.625rem 1.5rem;
  background: var(--color-accent);
  color: white;
  font-weight: var(--weight-semibold);
  font-size: var(--text-sm);
  border-radius: var(--radius-full);
  transition: all var(--ease-default);
  border: none; cursor: pointer;
  text-decoration: none;
}

.btn-cta:hover {
  background: var(--color-accent-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem; height: 2.5rem;
  background: transparent;
  border: none; cursor: pointer;
  color: white;
  transition: color var(--ease-default);
}

.mobile-menu-btn:hover { color: var(--color-accent); }

@media (min-width: 768px) {
  .mobile-menu-btn { display: none; }
  .mobile-menu { display: none; }
}

/* Mobile menu — slide-in drawer from left */
.mobile-menu {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 51;
  width: min(320px, 85vw);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  box-shadow: var(--shadow-xl);
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}

.mobile-menu.is-open { transform: translateX(0); }

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 1.5rem 1rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.mobile-menu-header a { text-decoration: none; color: var(--color-text); }

.mobile-menu-close {
  width: 2.5rem; height: 2.5rem;
  display: flex; align-items: center; justify-content: center;
  background: transparent; border: none; cursor: pointer;
  border-radius: var(--radius-full);
  color: var(--color-text);
  transition: background var(--ease-default);
}

.mobile-menu-close:hover { background: var(--color-bg-alt); }

.mobile-menu-nav {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-nav-section-title {
  display: block;
  padding: 1.25rem 0.75rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-lg);
  font-weight: var(--weight-medium);
  font-size: var(--text-sm);
  color: var(--color-text);
  text-decoration: none;
  transition: background var(--ease-default), color var(--ease-default);
}

.mobile-nav-link i:first-child {
  width: 1.25rem;
  text-align: center;
  font-size: 1rem;
  color: var(--color-text-secondary);
  transition: color var(--ease-default);
}

.mobile-nav-link:hover {
  background: rgba(30, 58, 138, 0.06);
  color: var(--color-primary);
}

.mobile-nav-link:hover i:first-child { color: var(--color-primary); }

.mobile-nav-link.is-active {
  background: rgba(30, 58, 138, 0.08);
  color: var(--color-primary);
  font-weight: 600;
}

.mobile-nav-link.is-active i:first-child { color: var(--color-primary); }

.mobile-nav-sub-link {
  display: block;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: background var(--ease-default), color var(--ease-default);
}

.mobile-nav-sub-link:hover {
  background: rgba(30, 58, 138, 0.06);
  color: var(--color-primary);
}

.mobile-nav-sub-link.is-active { color: var(--color-primary); font-weight: 600; }

.mobile-nav-details summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 0.75rem; }
.mobile-nav-details summary::-webkit-details-marker { display: none; }
.mobile-nav-details summary .fa-chevron-down { margin-left: auto; transition: transform 0.2s; }
.mobile-nav-details[open] summary .fa-chevron-down { transform: rotate(180deg); }

.mobile-menu-footer {
  padding: 1.25rem 1.5rem 2.5rem;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}

.mobile-menu-footer .btn-cta {
  width: 100%;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
}

html.dark .mobile-nav-link:hover { background: rgba(59, 130, 246, 0.1); color: var(--color-primary-light); }
html.dark .mobile-nav-link:hover i:first-child { color: var(--color-primary-light); }
html.dark .mobile-nav-link.is-active { background: rgba(59, 130, 246, 0.12); color: var(--color-primary-light); }
html.dark .mobile-nav-link.is-active i:first-child { color: var(--color-primary-light); }
html.dark .mobile-nav-sub-link:hover { background: rgba(59, 130, 246, 0.1); color: var(--color-primary-light); }
html.dark .mobile-nav-sub-link.is-active { color: var(--color-primary-light); }

/* Mobile menu overlay */
.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 49;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-overlay.is-open { opacity: 1; pointer-events: auto; }

/* ==========================================
   6. FOOTER
   ========================================== */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.footer-inner { padding: var(--space-16) 0 var(--space-10); }

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-16);
}

@media (min-width: 768px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-12); }
}

@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-16); }
}

.footer-heading {
  font-family: var(--font-display);
  font-weight: var(--weight-semibold);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-5);
  color: var(--color-text);
}

.footer-text {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.footer-link {
  color: var(--color-text-secondary);
  transition: color var(--ease-default);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-base);
}

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

.footer-link-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  color: var(--color-text-secondary);
}

.footer-contact-icon {
  width: 2rem; height: 2rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary);
}

html.dark .footer-contact-icon {
  color: var(--color-secondary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-8);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .footer-bottom { flex-direction: row; justify-content: space-between; }
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-5);
  font-size: var(--text-sm);
}

.footer-bottom-links a {
  color: var(--color-text-secondary);
  transition: color var(--ease-default);
}

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

.social-link {
  width: 2.25rem; height: 2.25rem;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  transition: all var(--ease-default);
}

.social-link:hover {
  transform: scale(1.1);
  color: white;
}

.social-link:hover[data-social="facebook"] { background: #1877f2; }
.social-link:hover[data-social="twitter"] { background: #1da1f2; }
.social-link:hover[data-social="instagram"] { background: var(--color-accent); }
.social-link:hover[data-social="linkedin"] { background: #0a66c2; }

/* ==========================================
   7. CARDS
   ========================================== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  transition: all var(--ease-spring);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(6, 182, 212, 0.15);
}

.card-glass {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  transition: all var(--ease-default);
}

.card-glass:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.card-media {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  transition: all var(--ease-default);
}

.card-media:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.card-media img {
  display: block;
  width: 100%;
  transition: transform 0.4s ease;
}

.card-media:hover img { transform: scale(1.03); }

.card-body { padding: var(--space-6); }
.card-body-wide { padding: var(--space-8); }

/* ==========================================
   8. BUTTONS
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  font-weight: var(--weight-semibold);
  font-size: var(--text-sm);
  border-radius: var(--radius-lg);
  transition: all var(--ease-default);
  border: none;
  cursor: pointer;
  text-align: center;
  line-height: 1.2;
  text-decoration: none;
}

/* Remove focus outline on click for all button classes */
.btn:focus,
.btn:focus-visible,
.btn-primary:focus,
.btn-primary:focus-visible,
.btn-secondary:focus,
.btn-secondary:focus-visible,
.btn-accent:focus,
.btn-accent:focus-visible,
.btn-outline:focus,
.btn-outline:focus-visible,
.btn-cta:focus,
.btn-cta:focus-visible { outline: none; }

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 4px 14px rgba(30, 58, 138, 0.2);
}

.btn-primary:hover {
  background: var(--color-primary-light);
  box-shadow: 0 6px 20px rgba(30, 58, 138, 0.25);
  transform: translateY(-1px);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--color-secondary-dark), var(--color-secondary));
  color: white;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.25);
}

.btn-secondary:hover {
  background: var(--color-secondary-light);
  transform: translateY(-1px);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: white;
  box-shadow: 0 4px 14px rgba(249, 115, 22, 0.25);
}

.btn-accent:hover {
  background: var(--color-accent-light);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

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

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: var(--text-xs);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: var(--text-base);
}

.btn-block { width: 100%; justify-content: center; }

/* ==========================================
   9. FORMS
   ========================================== */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .form-row { grid-template-columns: 1fr 1fr; }
}

.form-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-secondary);
}

.input-field,
.textarea-field,
.select-field {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  font-size: var(--text-base);
  font-family: var(--font-body);
  transition: all var(--ease-default);
  outline: none;
}

.input-field:focus,
.textarea-field:focus,
.select-field:focus {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.12);
}

html.dark .input-field,
html.dark .textarea-field,
html.dark .select-field {
  background: var(--color-bg-alt);
  border-color: var(--color-border);
}

.input-field::placeholder,
.textarea-field::placeholder,
.select-field::placeholder {
  color: var(--color-text-muted);
}

.textarea-field {
  resize: vertical;
  min-height: 8rem;
}

.select-field {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-error {
  padding: var(--space-3) var(--space-4);
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-lg);
  color: #dc2626;
  font-size: var(--text-sm);
}

.form-success {
  padding: var(--space-3) var(--space-4);
  background: rgba(34, 197, 94, 0.08);
  border: 1px solid rgba(34, 197, 94, 0.2);
  border-radius: var(--radius-lg);
  color: #16a34a;
  font-size: var(--text-sm);
}

/* ==========================================
   10. PAGE HEADER
   ========================================== */
.page-header {
  padding: 7rem 0 4rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  position: relative;
  overflow: hidden;
}

.page-header-inner {
  text-align: center;
  max-width: 48rem;
  margin: 0 auto;
}

.page-header-tag {
  display: inline-block;
  padding: 0.25rem 1rem;
  background: rgba(6, 182, 212, 0.15);
  color: var(--color-secondary-light);
  font-weight: var(--weight-semibold);
  font-size: 0.6875rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.page-header-title {
  font-family: var(--font-display);
  font-weight: var(--weight-extrabold);
  font-size: var(--text-4xl);
  color: white;
  margin-bottom: var(--space-4);
}

.page-header-description {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.8);
  max-width: 36rem;
  margin: 0 auto;
  line-height: 1.65;
}

@media (min-width: 768px) {
  .page-header { padding: 8rem 0 5rem; }
  .page-header-title { font-size: var(--text-5xl); }
}

/* ==========================================
   11. HERO
   ========================================== */
.hero-gradient-text {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-pattern {
  background-image:
    radial-gradient(circle at 20% 50%, rgba(6, 182, 212, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(249, 115, 22, 0.06) 0%, transparent 50%);
}

.stat-number {
  font-family: var(--font-display);
  font-weight: var(--weight-extrabold);
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  line-height: 1;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ==========================================
    12. HERO CAROUSEL
    ========================================== */
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.hero-slide.is-active {
  opacity: 1;
  pointer-events: auto;
  position: relative;
}

.hero-dot { cursor: pointer; }
.hero-dot:focus,
.hero-dot:focus-visible { outline: none !important; box-shadow: none !important; }
.hero-prev:focus,
.hero-prev:focus-visible,
.hero-next:focus,
.hero-next:focus-visible { outline: none !important; box-shadow: none !important; border-color: transparent !important; }
.hero-btn-secondary:focus,
.hero-btn-secondary:focus-visible { outline: none !important; box-shadow: none !important; }
.newsletter-submit-btn:focus,
.newsletter-submit-btn:focus-visible { outline: none !important; box-shadow: none !important; }
.teacher-name-link:focus,
.teacher-name-link:focus-visible,
.news-title-link:focus,
.news-title-link:focus-visible { outline: none !important; }

.hero-prev:hover,
.hero-next:hover { background: rgba(255, 255, 255, 0.3); }
.hero-dot:not(.bg-white):hover { background: rgba(255, 255, 255, 0.7); }
.hero-btn-secondary:hover {
  background: #fff;
  color: #1e3a8a;
  border-color: #fff;
}
.teacher-name-link:hover {
  color: #1e3a8a;
}
html.dark .teacher-name-link:hover {
  color: #06b6d4;
}
.news-title-link:hover {
  color: #1e3a8a;
}
html.dark .news-title-link:hover {
  color: #06b6d4;
}
.newsletter-submit-btn:hover {
  background: #fff;
  color: #1e3a8a;
  border-color: #fff;
}

@media (prefers-reduced-motion: reduce) {
  .hero-slide { transition: none; }
}

/* ==========================================
    13. ANIMATIONS
   ========================================== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible { opacity: 1; transform: translateY(0); }

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

.fade-in {
  opacity: 0;
  animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

.float-animation { animation: float 6s ease-in-out infinite; }

@media (prefers-reduced-motion: reduce) {
  .reveal, .fade-in, .float-animation { animation: none; opacity: 1; transform: none; }
}

/* ==========================================
   13. GALLERY
   ========================================== */
.masonry-grid {
  column-count: 1;
  column-gap: var(--space-6);
}

.masonry-grid .masonry-item {
  break-inside: avoid;
  margin-bottom: var(--space-6);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.masonry-grid .masonry-item img {
  display: block;
  width: 100%;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.masonry-grid .masonry-item:hover img { transform: scale(1.05); }

@media (min-width: 768px) { .masonry-grid { column-count: 2; } }
@media (min-width: 1024px) { .masonry-grid { column-count: 3; } }

/* ==========================================
   14. BADGES
   ========================================== */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-primary {
  background: rgba(30, 58, 138, 0.1);
  color: var(--color-primary);
}

.badge-accent {
  background: rgba(249, 115, 22, 0.12);
  color: var(--color-accent);
}

/* ==========================================
   15. TABLES
   ========================================== */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table thead { background: var(--color-bg-alt); }

.table th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: var(--weight-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: var(--text-xs);
  border-bottom: 1px solid var(--color-border);
}

.table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.table tbody tr { transition: background var(--ease-default); }
.table tbody tr:hover { background: var(--color-surface-hover); }
.table tbody tr:last-child td { border-bottom: none; }

/* ==========================================
   16. SCROLLBAR
   ========================================== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg-alt); }
::-webkit-scrollbar-thumb { background: var(--color-text-muted); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-secondary); }

/* ==========================================
   17. PAGINATION
   ========================================== */
.pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 0.75rem;
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid var(--color-border);
  transition: all var(--ease-default);
}

.pagination a:hover {
  background: var(--color-surface-hover);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.pagination a.active {
  background: var(--color-secondary);
  color: white;
  border-color: var(--color-secondary);
}

/* ==========================================
   18. GLASS UTILITY
   ========================================== */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
}

/* ==========================================
    19. Z-INDEX SYSTEM
    ========================================== */
:root {
  --z-dropdown:  100;
  --z-sticky:    200;
  --z-navbar:    500;
  --z-overlay:   600;
  --z-modal:     700;
  --z-toast:     800;
  --z-tooltip:   900;
}

/* ==========================================
    20. CONTENT VISIBILITY
    ========================================== */
.section.content-below { content-visibility: auto; contain-intrinsic-size: 600px; }

/* ==========================================
    21. FORM LOADING STATE
    ========================================== */
.btn-loading {
  position: relative;
  pointer-events: none;
  color: transparent !important;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ==========================================
    22. BREADCRUMBS
    ========================================== */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

.breadcrumbs a {
  color: var(--color-text-secondary);
  transition: color var(--ease-default);
}

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

.breadcrumbs .separator { color: var(--color-text-secondary); font-size: 0.625rem; }

.breadcrumbs .current { color: var(--color-text-secondary); font-weight: var(--weight-medium); }

/* ==========================================
    23. UTILITIES
    ========================================== */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 100;
  padding: 0.75rem 1.5rem;
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 600;
  transition: top 0.2s;
}

.skip-link:focus { top: 1rem; }

.bg-surface { background: var(--color-surface); }
.shadow-card { box-shadow: var(--shadow-card); }

#debugbar, .debug-bar { display: none !important; }

/* ==========================================
    22. LIGHTBOX
    ========================================== */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.lightbox:target {
  display: flex;
}

.lightbox .lightbox-bg {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  cursor: zoom-out;
}

.lightbox img {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  pointer-events: none;
  user-select: none;
}

.lightbox .lightbox-close {
  position: absolute;
  z-index: 2;
  top: var(--space-6);
  right: var(--space-6);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  color: white;
  font-size: 1.5rem;
  transition: background var(--ease-default);
}

.lightbox .lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.lightbox .lightbox-info {
  position: absolute;
  z-index: 2;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  max-width: 32rem;
  width: 100%;
  padding: var(--space-4) var(--space-6);
  background: rgba(0, 0, 0, 0.5);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

@media (max-width: 640px) {
  .lightbox .lightbox-info {
    bottom: var(--space-4);
    left: var(--space-4);
    right: var(--space-4);
    transform: none;
    max-width: none;
  }
}

/* ==========================================
    23. TOUCH TARGETS
   ========================================== */
@media (pointer: coarse) {
  .nav-link, .footer-link, .mobile-nav-link, .filter-btn,
  .btn, .btn-sm, .btn-lg, .btn-block,
  button, .theme-toggle, .mobile-menu-btn,
  .social-link, .pagination a {
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .nav-link, .footer-link, .mobile-nav-link {
    padding: 0.5rem 0.75rem;
  }
  .footer-contact-item a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
}

/* ==========================================
   21. PRINT STYLES
   ========================================== */
@media print {
  .navbar, .footer, .mobile-menu, .btn-cta,
  #scrollToTop, .skip-link { display: none !important; }
  .page-header, .section { padding: 1rem 0; }
  body { color: #000; background: #fff; }
  a { text-decoration: underline; }
}