/* ===========================================
   SchoolUp — Main Stylesheet
   SchoolUp by Tesseract Dynamics
   =========================================== */

/* ---------- CSS Variables ---------- */
:root {
  /* Colors */
  --color-primary: #0f766e;
  --color-primary-hover: #0d5d56;
  --color-primary-light: #ccfbf1;
  --color-primary-muted: rgba(15, 118, 110, 0.12);
  --color-text: #111827;
  --color-text-muted: #4b5563;
  --color-text-light: #9ca3af;
  --color-bg: #ffffff;
  --color-bg-soft: #fafafa;
  --color-bg-subtle: #f4f4f5;
  --color-border: #e4e4e7;
  --color-border-light: #f4f4f5;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.75rem;
  --font-size-5xl: 3.25rem;
  --line-height-tight: 1.2;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --container-max: 1120px;
  --container-padding: 1.5rem;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.06);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.08);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 220ms ease;
  --transition-slow: 320ms ease;

  /* Navbar */
  --navbar-height: 68px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

/* Improve tap targets on touch devices */
@media (hover: none) {
  .btn {
    min-height: 44px;
  }
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-md);
  z-index: 10000;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary);
  color: white;
  font-weight: 600;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: var(--space-md);
}

/* ---------- Layout ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--navbar-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

.logo {
  font-weight: 700;
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  flex-shrink: 0;
  letter-spacing: -0.02em;
}

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

.nav-links a {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.navbar-cta {
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: var(--space-md);
  min-width: 44px;
  min-height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.nav-toggle:hover {
  background: var(--color-bg-soft);
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: var(--transition-fast);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  border: none;
  box-shadow: 0 1px 2px rgba(15, 118, 110, 0.2);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(15, 118, 110, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
  color: var(--color-text);
}

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

.btn-full {
  width: 100%;
  padding: 0.875rem 1.5rem;
}

/* ---------- Hero Section ---------- */
.hero {
  padding-top: calc(var(--navbar-height) + var(--space-5xl));
  padding-bottom: var(--space-5xl);
  background: var(--color-bg);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-4xl);
  align-items: center;
}

.hero-badge {
  margin: 0 0 var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-muted);
  border-radius: 100px;
}

.hero-label {
  margin: 0 0 var(--space-md);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.hero-content h1 {
  margin: 0 0 var(--space-xl);
  font-size: clamp(2rem, 5vw, var(--font-size-5xl));
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: -0.03em;
}

.hero-subtitle {
  margin: 0 0 var(--space-2xl);
  font-size: var(--font-size-lg);
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 480px;
}

.hero-ctas {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.hero-trust {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-weight: 500;
}

/* Hero Dual Mockup (Phone + Desktop) */
.hero-dual-mockup {
  display: flex;
  align-items: flex-end;
  gap: var(--space-lg);
  justify-content: flex-end;
}

.hero-phone-mockup {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.hero-phone-frame {
  width: 140px;
  background: var(--color-text);
  border-radius: 28px;
  padding: 8px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.hero-phone-screen {
  background: var(--color-bg);
  border-radius: 20px;
  padding: var(--space-md);
  min-height: 200px;
}

.hero-phone-notch {
  width: 40px;
  height: 14px;
  margin: 0 auto var(--space-sm);
  background: var(--color-text);
  border-radius: 0 0 7px 7px;
}

.hero-phone-app-bar {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.hero-phone-row {
  height: 20px;
  background: var(--color-border-light);
  border-radius: 4px;
  margin-bottom: var(--space-xs);
}

.hero-phone-row.short {
  width: 70%;
}

.hero-phone-label {
  margin: 0;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-primary);
}

.hero-desktop-mockup {
  max-width: 280px;
}

/* Dashboard Mockup (CSS-only) */
.hero-visual {
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

.dashboard-mockup {
  width: 100%;
  max-width: 380px;
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border-light);
  overflow: hidden;
}

.mockup-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-subtle);
  border-bottom: 1px solid var(--color-border-light);
}

.mockup-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
}

.mockup-title {
  margin-left: auto;
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-light);
}

.mockup-content {
  display: flex;
  min-height: 220px;
}

.mockup-sidebar {
  width: 56px;
  padding: var(--space-md);
  background: var(--color-bg-subtle);
  border-right: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.mockup-menu-item {
  height: 20px;
  background: var(--color-border);
  border-radius: 4px;
  opacity: 0.6;
}

.mockup-menu-item.short {
  width: 55%;
}

.mockup-main {
  flex: 1;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.mockup-card {
  height: 56px;
  background: linear-gradient(135deg, var(--color-primary-muted) 0%, var(--color-bg-soft) 100%);
  border-radius: var(--radius-md);
}

.mockup-cards-row {
  display: flex;
  gap: var(--space-md);
}

.mockup-card.small {
  flex: 1;
  height: 48px;
  background: var(--color-bg-subtle);
}

/* ---------- Section Common ---------- */
.section {
  padding: var(--space-5xl) 0;
}

.section-label {
  margin: 0 0 var(--space-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  text-align: center;
}

.section-title {
  margin: 0 0 var(--space-md);
  font-size: clamp(1.625rem, 3.5vw, var(--font-size-3xl));
  font-weight: 700;
  text-align: center;
  color: var(--color-text);
  letter-spacing: -0.025em;
  line-height: var(--line-height-snug);
}

.section-subtitle {
  margin: 0 0 var(--space-2xl);
  font-size: var(--font-size-base);
  line-height: 1.6;
  text-align: center;
  color: var(--color-text-muted);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Dark + Light Bulb (all sections from Features onward) ---------- */
.section-dark-lit {
  --dim-in: 0.35s ease;
  --dim-out: 2s ease;
  background: #0a0e12 !important;
  position: relative;
  overflow: hidden;
  transition: background var(--dim-out);
}

.section-dark-lit:hover,
.section-dark-lit:target {
  background: #0d1117 !important;
  transition: background var(--dim-in);
}

.section-dark-content {
  position: relative;
  z-index: 4;
}

.section-bulb {
  position: absolute;
  top: var(--space-2xl);
  left: var(--space-2xl);
  width: 80px;
  height: 100px;
  z-index: 10;
  pointer-events: none;
  transition: filter var(--dim-out);
}

.section-dark-lit:hover .section-bulb,
.section-dark-lit:target .section-bulb {
  filter: drop-shadow(0 0 40px rgba(255, 220, 140, 0.9)) drop-shadow(0 0 80px rgba(255, 200, 80, 0.5));
  transition: filter var(--dim-in);
}

.section-bulb-base {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 18px;
  background: linear-gradient(180deg, #4a4a4a 0%, #2a2a2a 100%);
  border-radius: 0 0 4px 4px;
  clip-path: polygon(15% 0, 85% 0, 100% 100%, 0 100%);
  transition: background var(--dim-out);
}

.section-dark-lit:hover .section-bulb-base,
.section-dark-lit:target .section-bulb-base {
  background: linear-gradient(180deg, #5a5a5a 0%, #3a3a3a 100%);
  transition: background var(--dim-in);
}

.section-bulb-glass {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 44px;
  background: rgba(255, 255, 255, 0.03);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 50% 50% 45% 45%;
  transition: border-color var(--dim-out), box-shadow var(--dim-out);
}

.section-dark-lit:hover .section-bulb-glass,
.section-dark-lit:target .section-bulb-glass {
  border-color: rgba(255, 240, 180, 0.4);
  box-shadow: inset 0 0 20px rgba(255, 220, 120, 0.15);
  transition: border-color var(--dim-in), box-shadow var(--dim-in);
}

.section-bulb-filament {
  position: absolute;
  bottom: 36px;
  left: 50%;
  width: 4px;
  height: 20px;
  margin-left: -2px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  transition: background var(--dim-out), box-shadow var(--dim-out);
}

.section-dark-lit:hover .section-bulb-filament,
.section-dark-lit:target .section-bulb-filament {
  background: linear-gradient(180deg, #fff8e0 0%, #ffd54f 50%, #ffb300 100%);
  box-shadow: 0 0 20px rgba(255, 220, 120, 0.8);
  transition: background var(--dim-in), box-shadow var(--dim-in);
}

.section-beam {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 120% 100% at 8% 12%,
    rgba(255, 240, 200, 0.25) 0%,
    rgba(255, 220, 150, 0.08) 25%,
    transparent 55%
  );
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dim-out);
  z-index: 2;
}

.section-dark-lit:hover .section-beam,
.section-dark-lit:target .section-beam {
  opacity: 1;
  transition: opacity var(--dim-in);
}

.section-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  pointer-events: none;
  transition: opacity var(--dim-out);
  z-index: 3;
}

.section-dark-lit:hover .section-overlay,
.section-dark-lit:target .section-overlay {
  opacity: 0;
  transition: opacity var(--dim-in);
}

/* Dark section content - dim until hover */
.section-dark-lit .section-label {
  color: rgba(255, 255, 255, 0.4);
  transition: color var(--dim-out);
}

.section-dark-lit:hover .section-label,
.section-dark-lit:target .section-label {
  color: rgba(15, 118, 110, 0.9);
  transition: color var(--dim-in);
}

.section-dark-lit .section-title {
  color: rgba(255, 255, 255, 0.25);
  transition: color var(--dim-out);
}

.section-dark-lit:hover .section-title,
.section-dark-lit:target .section-title {
  color: #ffffff;
  transition: color var(--dim-in);
}

.section-dark-lit .section-subtitle {
  color: rgba(255, 255, 255, 0.2);
  transition: color var(--dim-out);
}

.section-dark-lit:hover .section-subtitle,
.section-dark-lit:target .section-subtitle {
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--dim-in);
}

/* Features cards */
.section-dark-lit .feature-card {
  background: rgba(255, 255, 255, 0.02);
  border-color: rgba(255, 255, 255, 0.06);
  transition: background var(--dim-out), border-color var(--dim-out);
}

.section-dark-lit .feature-card h3,
.section-dark-lit .feature-card p {
  color: rgba(255, 255, 255, 0.3);
  transition: color var(--dim-out);
}

.section-dark-lit:hover .feature-card,
.section-dark-lit:target .feature-card {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  transition: background var(--dim-in), border-color var(--dim-in);
}

.section-dark-lit:hover .feature-card h3,
.section-dark-lit:hover .feature-card p,
.section-dark-lit:target .feature-card h3,
.section-dark-lit:target .feature-card p {
  color: rgba(255, 255, 255, 0.9);
  transition: color var(--dim-in);
}

.section-dark-lit .feature-card .icon-shape {
  background: rgba(255, 255, 255, 0.3);
  transition: background var(--dim-out);
}

.section-dark-lit:hover .feature-card .icon-shape,
.section-dark-lit:target .feature-card .icon-shape {
  background: var(--color-primary);
  transition: background var(--dim-in);
}

/* Mobile showcase */
.section-dark-lit .mobile-showcase-badge,
.section-dark-lit .mobile-showcase-heading,
.section-dark-lit .mobile-showcase-text,
.section-dark-lit .mobile-showcase-list li {
  color: rgba(255, 255, 255, 0.3);
  transition: color var(--dim-out);
}

.section-dark-lit:hover .mobile-showcase-badge,
.section-dark-lit:target .mobile-showcase-badge {
  color: rgba(15, 118, 110, 0.9);
  transition: color var(--dim-in);
}

.section-dark-lit:hover .mobile-showcase-heading,
.section-dark-lit:hover .mobile-showcase-text,
.section-dark-lit:hover .mobile-showcase-list li,
.section-dark-lit:target .mobile-showcase-heading,
.section-dark-lit:target .mobile-showcase-text,
.section-dark-lit:target .mobile-showcase-list li {
  color: rgba(255, 255, 255, 0.9);
  transition: color var(--dim-in);
}

.section-dark-lit .mobile-screen-card {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.08);
  transition: background var(--dim-out), border-color var(--dim-out);
}

.section-dark-lit:hover .mobile-screen-card,
.section-dark-lit:target .mobile-screen-card {
  background: rgba(255, 255, 255, 0.08);
  transition: background var(--dim-in), border-color var(--dim-in);
}

/* Role cards (For Schools) */
.section-dark-lit .role-card {
  background: rgba(255, 255, 255, 0.02);
  border-color: rgba(255, 255, 255, 0.06);
  transition: background var(--dim-out), border-color var(--dim-out);
}

.section-dark-lit .role-card h3,
.section-dark-lit .role-card p {
  color: rgba(255, 255, 255, 0.3);
  transition: color var(--dim-out);
}

.section-dark-lit:hover .role-card,
.section-dark-lit:target .role-card {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  transition: background var(--dim-in), border-color var(--dim-in);
}

.section-dark-lit:hover .role-card h3,
.section-dark-lit:hover .role-card p,
.section-dark-lit:target .role-card h3,
.section-dark-lit:target .role-card p {
  color: rgba(255, 255, 255, 0.9);
  transition: color var(--dim-in);
}

/* Why cards */
.section-dark-lit .why-card {
  background: rgba(255, 255, 255, 0.02);
  border-color: rgba(255, 255, 255, 0.06);
  transition: background var(--dim-out), border-color var(--dim-out);
}

.section-dark-lit .why-card h3,
.section-dark-lit .why-card p,
.section-dark-lit .why-card .why-number {
  color: rgba(255, 255, 255, 0.3);
  transition: color var(--dim-out);
}

.section-dark-lit:hover .why-card,
.section-dark-lit:target .why-card {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  transition: background var(--dim-in), border-color var(--dim-in);
}

.section-dark-lit:hover .why-card h3,
.section-dark-lit:hover .why-card p,
.section-dark-lit:target .why-card h3,
.section-dark-lit:target .why-card p {
  color: rgba(255, 255, 255, 0.9);
  transition: color var(--dim-in);
}

.section-dark-lit:hover .why-card .why-number,
.section-dark-lit:target .why-card .why-number {
  color: rgba(15, 118, 110, 0.9);
  transition: color var(--dim-in);
}

/* About */
.section-dark-lit .about-content p {
  color: rgba(255, 255, 255, 0.3);
  transition: color var(--dim-out);
}

.section-dark-lit:hover .about-content p,
.section-dark-lit:target .about-content p {
  color: rgba(255, 255, 255, 0.85);
  transition: color var(--dim-in);
}

/* Contact */
.section-dark-lit .contact-info p,
.section-dark-lit .contact-info a {
  color: rgba(255, 255, 255, 0.3);
  transition: color var(--dim-out);
}

.section-dark-lit:hover .contact-info p,
.section-dark-lit:hover .contact-info a,
.section-dark-lit:target .contact-info p,
.section-dark-lit:target .contact-info a {
  color: rgba(255, 255, 255, 0.85);
  transition: color var(--dim-in);
}

.section-dark-lit .form-group label {
  color: rgba(255, 255, 255, 0.4);
  transition: color var(--dim-out);
}

.section-dark-lit:hover .form-group label {
  color: rgba(255, 255, 255, 0.9);
  transition: color var(--dim-in);
}

.section-dark-lit .form-group input,
.section-dark-lit .form-group textarea {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.9);
  transition: background var(--dim-out), border-color var(--dim-out);
}

.section-dark-lit:hover .form-group input,
.section-dark-lit:hover .form-group textarea,
.section-dark-lit:target .form-group input,
.section-dark-lit:target .form-group textarea {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  transition: background var(--dim-in), border-color var(--dim-in);
}

.section-dark-lit .form-group input::placeholder,
.section-dark-lit .form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.section-dark-lit .form-note {
  color: rgba(255, 255, 255, 0.35);
  transition: color var(--dim-out);
}

.section-dark-lit:hover .form-note,
.section-dark-lit:target .form-note {
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--dim-in);
}

/* Contact section: always lit */
#contact.section-dark-lit {
  background: #0d1117 !important;
}
#contact.section-dark-lit .section-bulb {
  filter: drop-shadow(0 0 40px rgba(255, 220, 140, 0.9)) drop-shadow(0 0 80px rgba(255, 200, 80, 0.5));
}
#contact.section-dark-lit .section-bulb-base {
  background: linear-gradient(180deg, #5a5a5a 0%, #3a3a3a 100%);
}
#contact.section-dark-lit .section-bulb-glass {
  border-color: rgba(255, 240, 180, 0.4);
  box-shadow: inset 0 0 20px rgba(255, 220, 120, 0.15);
}
#contact.section-dark-lit .section-bulb-filament {
  background: linear-gradient(180deg, #fff8e0 0%, #ffd54f 50%, #ffb300 100%);
  box-shadow: 0 0 20px rgba(255, 220, 120, 0.8);
}
#contact.section-dark-lit .section-beam {
  opacity: 1;
}
#contact.section-dark-lit .section-overlay {
  opacity: 0;
}
#contact.section-dark-lit .section-label {
  color: rgba(15, 118, 110, 0.9);
}
#contact.section-dark-lit .section-title {
  color: #ffffff;
}
#contact.section-dark-lit .section-subtitle {
  color: rgba(255, 255, 255, 0.75);
}
#contact.section-dark-lit .contact-info p,
#contact.section-dark-lit .contact-info a {
  color: rgba(255, 255, 255, 0.85);
}
#contact.section-dark-lit .form-group label {
  color: rgba(255, 255, 255, 0.9);
}
#contact.section-dark-lit .form-group input,
#contact.section-dark-lit .form-group textarea {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}
#contact.section-dark-lit .form-note {
  color: rgba(255, 255, 255, 0.6);
}

#contact.section-dark-lit .contact-response {
  color: rgba(255, 255, 255, 0.55) !important;
}

/* Digital Labs intro & cards */
.section-dark-lit .digital-labs-intro {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.06);
  transition: background var(--dim-out), border-color var(--dim-out);
}

.section-dark-lit .digital-labs-intro p {
  color: rgba(255, 255, 255, 0.35);
  transition: color var(--dim-out);
}

.section-dark-lit:hover .digital-labs-intro,
.section-dark-lit:target .digital-labs-intro {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  transition: background var(--dim-in), border-color var(--dim-in);
}

.section-dark-lit:hover .digital-labs-intro p,
.section-dark-lit:target .digital-labs-intro p {
  color: rgba(255, 255, 255, 0.85);
  transition: color var(--dim-in);
}

.section-dark-lit .labs-card h3,
.section-dark-lit .labs-card p {
  color: rgba(255, 255, 255, 0.25);
  transition: color var(--dim-out);
}

.section-dark-lit .labs-card.visible {
  transition: background var(--dim-out), border-color var(--dim-out);
}

.section-dark-lit:hover .labs-card h3,
.section-dark-lit:hover .labs-card p,
.section-dark-lit:target .labs-card h3,
.section-dark-lit:target .labs-card p {
  color: rgba(255, 255, 255, 0.95);
  transition: color var(--dim-in);
}

.section-dark-lit:hover .labs-card.visible,
.section-dark-lit:target .labs-card.visible {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  transition: background var(--dim-in), border-color var(--dim-in);
}

/* Touch: show lit by default */
@media (hover: none) {
  .section-dark-lit { background: #0d1117 !important; }
  .section-dark-lit .section-beam { opacity: 1; }
  .section-dark-lit .section-overlay { opacity: 0; }
  .section-dark-lit .section-label { color: rgba(15, 118, 110, 0.9); }
  .section-dark-lit .section-title { color: #ffffff; }
  .section-dark-lit .section-subtitle { color: rgba(255, 255, 255, 0.75); }
  .section-dark-lit .section-bulb { filter: drop-shadow(0 0 40px rgba(255, 220, 140, 0.9)); }
  .section-dark-lit .section-bulb-glass { border-color: rgba(255, 240, 180, 0.4); }
  .section-dark-lit .section-bulb-filament { background: linear-gradient(180deg, #fff8e0 0%, #ffd54f 50%, #ffb300 100%); }
  .section-dark-lit .feature-card,
  .section-dark-lit .role-card,
  .section-dark-lit .why-card { background: rgba(255, 255, 255, 0.06); border-color: rgba(255, 255, 255, 0.12); }
  .section-dark-lit .feature-card h3, .section-dark-lit .feature-card p,
  .section-dark-lit .role-card h3, .section-dark-lit .role-card p,
  .section-dark-lit .why-card h3, .section-dark-lit .why-card p { color: rgba(255, 255, 255, 0.9); }
  .section-dark-lit .why-card .why-number { color: rgba(15, 118, 110, 0.9); }
  .section-dark-lit .mobile-showcase-badge, .section-dark-lit .mobile-showcase-heading,
  .section-dark-lit .mobile-showcase-text, .section-dark-lit .mobile-showcase-list li { color: rgba(255, 255, 255, 0.9); }
  .section-dark-lit .mobile-showcase-badge { color: rgba(15, 118, 110, 0.9); }
  .section-dark-lit .about-content p,
  .section-dark-lit .contact-info p, .section-dark-lit .contact-info a { color: rgba(255, 255, 255, 0.85); }
  .section-dark-lit .form-group label { color: rgba(255, 255, 255, 0.9); }
  .section-dark-lit .form-group input, .section-dark-lit .form-group textarea { background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.2); }
  .section-dark-lit .form-note { color: rgba(255, 255, 255, 0.6); }
  .section-dark-lit .digital-labs-intro { background: rgba(255, 255, 255, 0.06); border-color: rgba(255, 255, 255, 0.12); }
  .section-dark-lit .digital-labs-intro p { color: rgba(255, 255, 255, 0.85); }
  .section-dark-lit .labs-card.visible,
  .section-dark-lit:hover .labs-card.visible { background: rgba(255, 255, 255, 0.06); border-color: rgba(255, 255, 255, 0.12); }
  .section-dark-lit .labs-card h3, .section-dark-lit .labs-card p { color: rgba(255, 255, 255, 0.95); }
}

/* ---------- Features Section ---------- */
.features {
  background: var(--color-bg-soft);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  background: var(--color-bg);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.feature-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--color-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.feature-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  margin-bottom: var(--space-lg);
}

.icon-shape {
  display: inline-block;
  width: 32px;
  height: 4px;
  border-radius: 2px;
  background: var(--color-primary);
  opacity: 0.9;
}

.feature-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.feature-card p {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: 1.6;
  color: var(--color-text-muted);
}

/* ---------- Mobile Access Section (Showcase) ---------- */
.mobile-access {
  background: var(--color-bg);
}

.mobile-showcase {
  background: linear-gradient(180deg, var(--color-bg-soft) 0%, var(--color-bg) 50%);
}

.mobile-showcase-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.mobile-screens {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: var(--space-md);
  padding: var(--space-xl) 0;
}

.mobile-screen-card {
  background: var(--color-bg);
  padding: var(--space-lg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-light);
}

.mobile-screen-card.mobile-screen-1 { transform: translateY(0); }
.mobile-screen-card.mobile-screen-2 { transform: translateY(24px); }
.mobile-screen-card.mobile-screen-3 { transform: translateY(48px); }

.mobile-screen-phone {
  width: 120px;
  background: var(--color-text);
  border-radius: 20px;
  padding: 6px;
  margin: 0 auto;
}

.mobile-screen-inner {
  background: var(--color-bg);
  border-radius: 14px;
  overflow: hidden;
}

.mobile-screen-notch {
  width: 36px;
  height: 12px;
  margin: 0 auto 6px;
  background: var(--color-text);
  border-radius: 0 0 6px 6px;
}

.mobile-screen-header {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--color-primary);
  text-align: center;
  margin: 0 0 8px;
  padding: 0 8px;
}

.mobile-screen-content {
  padding: var(--space-sm);
  min-height: 100px;
}

.mobile-screen-item {
  height: 16px;
  background: var(--color-border-light);
  border-radius: 4px;
  margin-bottom: 6px;
}

.mobile-screen-item.short { width: 65%; }
.mobile-screen-item.wide { height: 24px; margin-bottom: 8px; }

.mobile-showcase-content {
  padding: var(--space-lg) 0;
}

.mobile-showcase-badge {
  margin: 0 0 var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
}

.mobile-showcase-heading {
  margin: 0 0 var(--space-md);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.mobile-showcase-text {
  margin: 0 0 var(--space-lg);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-muted);
}

.mobile-showcase-list {
  margin: 0;
  padding: 0 0 0 var(--space-xl);
  list-style: none;
}

.mobile-showcase-list li {
  position: relative;
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.mobile-showcase-list li::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-xl));
  top: 0.5em;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
}

/* ---------- Digital Labs Section ---------- */
.digital-labs-intro {
  max-width: 640px;
  margin: 0 auto var(--space-2xl);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  transition: all 0.5s ease;
}

.digital-labs-intro p {
  margin: 0;
  font-size: var(--font-size-base);
  line-height: 1.7;
}

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

.labs-card {
  padding: var(--space-2xl);
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  transform: translateY(24px);
  position: relative;
  overflow: hidden;
}

.labs-card.visible {
  animation: labsCardReveal 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.labs-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 118, 110, 0.03) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.labs-card:hover {
  border-color: rgba(15, 118, 110, 0.3);
  box-shadow: 0 8px 32px rgba(15, 118, 110, 0.12), 0 0 0 1px rgba(15, 118, 110, 0.08);
  transform: translateY(-4px);
}

.labs-card:hover::before {
  opacity: 1;
}

.labs-card-1.visible { animation-delay: 0.1s; }
.labs-card-2.visible { animation-delay: 0.2s; }
.labs-card-3.visible { animation-delay: 0.3s; }
.labs-card-4.visible { animation-delay: 0.4s; }

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

.labs-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.labs-card p {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* ---------- For Schools Section ---------- */
.for-schools {
  background: var(--color-bg-soft);
}

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

.role-card {
  padding: var(--space-2xl);
  background: var(--color-bg-soft);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

.role-card:hover {
  background: var(--color-bg);
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
}

.role-icon {
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
  opacity: 0.9;
}

.role-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.role-card p {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: 1.6;
  color: var(--color-text-muted);
}

/* ---------- Why SchoolUp Section ---------- */
.why-schoolup {
  background: var(--color-bg-subtle);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
}

.why-card {
  padding: var(--space-2xl);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

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

/* Scroll reveal (subtle) */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

.why-number {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.why-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.why-card p {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: 1.6;
  color: var(--color-text-muted);
}

/* ---------- About Section ---------- */
.about {
  padding: var(--space-4xl) 0;
  background: var(--color-bg);
}

.about-content {
  max-width: 580px;
  margin: 0 auto;
  text-align: center;
}

.about-content .section-title {
  margin-bottom: var(--space-xl);
}

.about-content p {
  margin: 0;
  font-size: var(--font-size-lg);
  line-height: 1.7;
  color: var(--color-text-muted);
}

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

.contact-inner {
  max-width: 560px;
  margin: 0 auto;
  display: grid;
  gap: var(--space-2xl);
}

.contact-info {
  text-align: center;
  padding-bottom: var(--space-md);
}

.contact-info p {
  margin: 0 0 var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.contact-info a {
  color: var(--color-primary);
  font-weight: 600;
}

.contact-info a:hover {
  text-decoration: underline;
}

.contact-response {
  margin-top: var(--space-sm) !important;
  font-size: var(--font-size-xs) !important;
  color: var(--color-text-light) !important;
  font-weight: 500;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  padding: 0.875rem 1.25rem;
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-light);
}

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

.form-note {
  margin: calc(-1 * var(--space-sm)) 0 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

/* ---------- Footer ---------- */
.footer {
  padding: var(--space-3xl) 0;
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.8);
}

.footer-inner {
  text-align: center;
}

.footer-brand {
  margin-bottom: var(--space-lg);
}

.footer-logo {
  display: block;
  font-weight: 600;
  color: white;
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-base);
  letter-spacing: -0.01em;
}

.footer-brand a {
  display: block;
  color: rgba(255, 255, 255, 0.75);
  font-size: var(--font-size-sm);
}

.footer-brand a:hover {
  color: white;
}

.footer-domain {
  margin-top: var(--space-sm);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.65);
}

.footer-links a:hover {
  color: white;
}

.footer-copy {
  margin: 0;
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.45);
}

/* ---------- Legal Pages (shared) ---------- */
.legal-page {
  padding-top: calc(var(--navbar-height) + var(--space-3xl));
  padding-bottom: var(--space-4xl);
  min-height: 100vh;
}

.legal-page .container {
  max-width: 720px;
}

.legal-page h1 {
  margin: 0 0 var(--space-xl);
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-text);
}

.legal-page h2 {
  margin: var(--space-2xl) 0 var(--space-md);
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
}

.legal-page p, .legal-page li {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-md);
}

.legal-page ul {
  padding-left: var(--space-xl);
  margin: 0 0 var(--space-md);
}

.legal-page .back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 500;
}

.legal-page .back-link:hover {
  text-decoration: underline;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--space-3xl);
    text-align: center;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

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

  .hero-trust {
    text-align: center;
  }

  .hero-visual {
    order: -1;
    justify-content: center;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .mobile-showcase-inner {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .mobile-screens {
    order: -1;
    padding: var(--space-lg) 0;
  }

  .mobile-screen-card.mobile-screen-2,
  .mobile-screen-card.mobile-screen-3 {
    transform: translateY(0);
  }

  .hero-dual-mockup {
    flex-direction: column;
    align-items: center;
  }

  .hero-phone-mockup {
    order: -1;
  }

  .hero-desktop-mockup {
    max-width: 320px;
  }

  .digital-labs-grid {
    grid-template-columns: 1fr;
  }


  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --navbar-height: 64px;
  }

  .nav-links,
  .navbar-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .navbar.open {
    height: auto;
  }

  .navbar.open .navbar-inner {
    flex-wrap: wrap;
    padding-bottom: 0;
  }

  .navbar.open .nav-links {
    display: flex;
    flex-direction: column;
    order: 10;
    width: 100%;
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-border-light);
    gap: var(--space-sm);
  }

  .navbar.open .navbar-cta {
    display: inline-flex;
    order: 11;
    width: 100%;
    margin-bottom: var(--space-lg);
    justify-content: center;
    padding: 0.875rem 1.5rem;
  }

  .hero {
    padding-top: calc(var(--navbar-height) + var(--space-4xl));
    padding-bottom: var(--space-4xl);
  }

  .hero-content h1 {
    font-size: clamp(1.75rem, 8vw, 2.25rem);
  }

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

  .hero-ctas {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .hero-ctas .btn {
    width: 100%;
    padding: 0.875rem 1.5rem;
    min-height: 48px;
  }

  .section {
    padding: var(--space-4xl) 0;
  }

  .section-title {
    font-size: clamp(1.5rem, 5vw, 1.75rem);
  }

  .section-subtitle {
    font-size: var(--font-size-sm);
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .mobile-screens {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
  }

  .mobile-screen-card {
    padding: var(--space-md);
  }

  .mobile-screen-phone {
    width: 100px;
  }

  .mobile-showcase-heading {
    font-size: var(--font-size-xl);
  }

  .labs-card {
    padding: var(--space-xl);
  }

  .feature-card {
    padding: var(--space-xl);
  }

  .for-schools-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .role-card {
    padding: var(--space-xl);
  }

  .why-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .why-card {
    padding: var(--space-xl);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .form-group input,
  .form-group textarea {
    padding: 0.875rem 1rem;
    min-height: 48px;
  }

  .contact-form button[type="submit"] {
    min-height: 48px;
  }

  .footer {
    padding: var(--space-2xl) 0;
  }

  .footer-links {
    flex-direction: column;
    gap: var(--space-md);
  }
}

@media (max-width: 480px) {
  :root {
    --container-padding: 1.25rem;
  }

  .section {
    padding: var(--space-3xl) 0;
  }

  .feature-card,
  .role-card,
  .why-card,
  .labs-card {
    padding: var(--space-lg);
  }

  .hero-label {
    font-size: 0.7rem;
    letter-spacing: 0.1em;
  }
}