/* ============================================================
   SAM Boachie Senior High School — Landing Page
   Design System & Styles
   ============================================================ */

/* --- Design Tokens --- */
:root {
  /* Colors — Primary */
  --color-primary: #0F172A;
  --color-secondary: #334155;
  --color-cta: #0369A1;
  --color-cta-hover: #0284C7;
  --color-accent-gold: #D4A017;
  --color-accent-gold-bg: rgba(212, 160, 23, 0.1);

  /* Colors — Neutral */
  --color-white: #FFFFFF;
  --color-bg: #F8FAFC;
  --color-bg-alt: #F1F5F9;
  --color-text: #020617;
  --color-text-muted: #475569;
  --color-text-light: #64748B;
  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;

  /* Footer */
  --color-footer-bg: #0F172A;
  --color-footer-text: #94A3B8;
  --color-footer-heading: #F1F5F9;

  /* Typography */
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Open Sans', sans-serif;

  /* Spacing */
  --section-py: 5rem;
  --container-max: 80rem;
  --container-px: 1.5rem;

  /* Borders & Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.06);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12);

  /* Transitions */
  --transition-fast: 200ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Z-index layers */
  --z-base: 1;
  --z-dropdown: 30;
  --z-nav: 50;
  --z-overlay: 60;
  --z-modal: 70;
  --z-tooltip: 80;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 6rem;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input,
select,
textarea,
button {
  font-family: inherit;
  font-size: inherit;
}

ul {
  list-style: none;
}

/* --- Focus Styles (Keyboard Navigation) --- */
:focus-visible {
  outline: 2px solid var(--color-cta);
  outline-offset: 2px;
  border-radius: 4px;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-px);
  padding-right: var(--container-px);
}

/* --- Section Base --- */
.section {
  padding-top: var(--section-py);
  padding-bottom: var(--section-py);
}

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

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 36rem;
  margin: 0 auto;
  line-height: 1.6;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  white-space: nowrap;
  line-height: 1.4;
  border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--color-cta);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(3, 105, 161, 0.35);
}

.btn-primary:hover {
  background-color: var(--color-cta-hover);
  box-shadow: 0 6px 20px rgba(3, 105, 161, 0.45);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline-light {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.7);
}

.btn-outline-light:hover {
  background-color: var(--color-white);
  color: var(--color-text);
  border-color: var(--color-white);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: 1.05rem;
}

.btn svg {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

.btn-lg svg {
  width: 1.375rem;
  height: 1.375rem;
}

/* ============================================================
   HEADER & NAVIGATION
   ============================================================ */
.header {
  position: fixed;
  top: 0.75rem;
  left: 1rem;
  right: 1rem;
  max-width: calc(var(--container-max) + 2rem);
  margin: 0 auto;
  z-index: var(--z-nav);
  transition: all var(--transition-base);
}

.header-scrolled {
  top: 0.5rem;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.625rem 1.5rem;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(226, 232, 240, 0.6);
  transition: padding var(--transition-base);
}

.header-scrolled .header-inner {
  padding-top: 0.45rem;
  padding-bottom: 0.45rem;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-shrink: 0;
}

.header-logo-img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.header-logo-text {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
}

.header-logo-text span {
  color: var(--color-cta);
}

/* --- Desktop Nav Menu --- */
.nav {
  display: flex;
  align-items: center;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.5rem 0.875rem;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--color-cta);
  background-color: rgba(3, 105, 161, 0.06);
}

.nav-link.active {
  color: var(--color-cta);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0.15rem;
  left: 50%;
  transform: translateX(-50%);
  width: 1.25rem;
  height: 2px;
  background-color: var(--color-cta);
  border-radius: 1px;
}

.nav-cta {
  margin-left: 0.75rem;
}

/* --- Mobile Menu Toggle --- */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  gap: 5px;
  transition: background var(--transition-fast);
}

.mobile-toggle:hover {
  background-color: rgba(3, 105, 161, 0.06);
}

.mobile-toggle-bar {
  display: block;
  width: 1.375rem;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.mobile-toggle[aria-expanded="true"] .mobile-toggle-bar:nth-child(1) {
  transform: rotate(45deg) translate(4px, 6px);
}

.mobile-toggle[aria-expanded="true"] .mobile-toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.mobile-toggle[aria-expanded="true"] .mobile-toggle-bar:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -6px);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: url('../images/banner.jpg') center / cover no-repeat;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(15, 23, 42, 0.7) 100%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: var(--z-base);
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 6rem;
  padding-bottom: 4rem;
}

.hero-content {
  color: var(--color-white);
  text-align: center;
  max-width: 48rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1.125rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--color-accent-gold);
  border-radius: 9999px;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent-gold);
  margin-bottom: 1.5rem;
  backdrop-filter: blur(4px);
}

.hero-badge svg {
  width: 1rem;
  height: 1rem;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.12;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2.25rem;
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about-intro {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: 52rem;
  margin: 0 auto 3rem;
  text-align: center;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.about-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.about-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-border);
}

.about-card-icon {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--radius-md);
  background: rgba(3, 105, 161, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--color-cta);
}

.about-card-icon svg {
  width: 1.65rem;
  height: 1.65rem;
}

.about-card-icon--gold {
  background: var(--color-accent-gold-bg);
  color: var(--color-accent-gold);
}

.about-card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.about-card-text {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.about-values {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.about-values li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.about-values li svg {
  width: 1rem;
  height: 1rem;
  color: var(--color-accent-gold);
  flex-shrink: 0;
}

/* ============================================================
   ACADEMIC PROGRAMS
   ============================================================ */
.programs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.program-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.program-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-border);
}

.program-icon {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--color-white);
}

.program-icon svg {
  width: 1.65rem;
  height: 1.65rem;
}

.program-icon--arts {
  background: linear-gradient(135deg, #0369A1, #0284C7);
}

.program-icon--science {
  background: linear-gradient(135deg, #0F172A, #334155);
}

.program-icon--business {
  background: linear-gradient(135deg, #D4A017, #B8860B);
}

.program-icon--tech {
  background: linear-gradient(135deg, #334155, #475569);
}

.program-icon--home {
  background: linear-gradient(135deg, #0369A1, #0EA5E9);
}

.program-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.program-desc {
  font-size: 0.925rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================================
   WHY CHOOSE / BENEFITS
   ============================================================ */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.benefit-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.benefit-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.benefit-card-icon {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto 1.25rem;
  border-radius: var(--radius-md);
  background: rgba(3, 105, 161, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-cta);
  transition: all var(--transition-base);
}

.benefit-card:hover .benefit-card-icon {
  background: var(--color-cta);
  color: var(--color-white);
}

.benefit-card-icon svg {
  width: 1.75rem;
  height: 1.75rem;
}

.benefit-card-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.benefit-card-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   ADMISSIONS
   ============================================================ */
.admissions-content {
  max-width: 48rem;
  margin: 0 auto;
  text-align: center;
}

.admissions-text p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.admissions-cta {
  margin-top: 2.5rem;
}

/* ============================================================
   STUDENT LIFE
   ============================================================ */
.student-life-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.student-life-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.student-life-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.student-life-icon {
  width: 3.25rem;
  height: 3.25rem;
  margin: 0 auto 1.25rem;
  border-radius: 50%;
  background: rgba(3, 105, 161, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-cta);
  transition: all var(--transition-base);
}

.student-life-card:hover .student-life-icon {
  background: var(--color-cta);
  color: var(--color-white);
}

.student-life-icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.student-life-card-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.student-life-card-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   GALLERY
   ============================================================ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.gallery-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover img {
  transform: scale(1.08);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-base);
}

.gallery-item:hover .gallery-overlay {
  background: rgba(15, 23, 42, 0.4);
}

.gallery-overlay svg {
  width: 2rem;
  height: 2rem;
  color: var(--color-white);
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition-base);
}

.gallery-item:hover .gallery-overlay svg {
  opacity: 1;
  transform: scale(1);
}

/* ============================================================
   LIGHTBOX
   ============================================================ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: rgba(15, 23, 42, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  padding: 2rem;
  cursor: pointer;
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-image {
  max-width: min(90vw, 56rem);
  max-height: min(85vh, 48rem);
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  cursor: default;
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
  cursor: pointer;
  border: none;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.25);
}

.lightbox-close svg {
  width: 1.5rem;
  height: 1.5rem;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
  max-width: 56rem;
  margin: 0 auto;
}

.contact-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.contact-detail:last-child {
  margin-bottom: 0;
}

.contact-detail svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-cta);
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.contact-detail strong {
  color: var(--color-text);
  font-family: var(--font-heading);
  font-weight: 600;
}

.contact-detail a {
  color: var(--color-cta);
  transition: color var(--transition-fast);
}

.contact-detail a:hover {
  color: var(--color-cta-hover);
}

.contact-whatsapp-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.contact-whatsapp-card > svg {
  width: 3rem;
  height: 3rem;
  color: #25D366;
  margin-bottom: 1rem;
}

.contact-whatsapp-card h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.contact-whatsapp-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.contact-whatsapp-card .btn {
  width: 100%;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding-top: 4rem;
  padding-bottom: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.footer-logo-img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.footer-logo-text {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-footer-heading);
}

.footer-logo-text span {
  color: var(--color-cta);
}

.footer-description {
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 24rem;
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-footer-heading);
  margin-bottom: 1.25rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--color-footer-text);
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

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

.footer-link svg {
  width: 0.875rem;
  height: 0.875rem;
  flex-shrink: 0;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-contact-item:last-child {
  margin-bottom: 0;
}

.footer-contact-item svg {
  width: 1.125rem;
  height: 1.125rem;
  color: var(--color-cta);
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0;
  font-size: 0.85rem;
  color: rgba(148, 163, 184, 0.6);
}

.footer-bottom-links {
  display: flex;
  gap: 1.5rem;
}

.footer-bottom-links a {
  transition: color var(--transition-fast);
}

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

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: var(--z-tooltip);
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--color-cta);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  opacity: 0;
  visibility: hidden;
  transform: translateY(1rem);
  cursor: pointer;
  border: none;
}

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

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

.back-to-top:active {
  transform: translateY(0);
}

.back-to-top svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* ============================================================
   SCROLL REVEAL ANIMATION
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(2rem);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ============================================================
   PREFERS REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================
   RESPONSIVE: TABLET (768px - 1023px)
   ============================================================ */
@media (max-width: 1023px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

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

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

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

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

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

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

/* ============================================================
   RESPONSIVE: MOBILE (< 768px)
   ============================================================ */
@media (max-width: 767px) {
  :root {
    --container-px: 1.25rem;
    --section-py: 3.5rem;
  }

  .header {
    left: 0.75rem;
    right: 0.75rem;
    top: 0.5rem;
  }

  .header-inner {
    padding: 0.5rem 1rem;
  }

  .header-logo-text {
    font-size: 1.05rem;
  }

  .header-logo-img {
    width: 34px;
    height: 34px;
  }

  /* Mobile nav: hidden by default */
  .mobile-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
    flex-direction: column;
    padding: 0.75rem;
    gap: 0.25rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.5rem);
    transition: all var(--transition-base);
  }

  .nav-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-link {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
  }

  .nav-cta {
    width: 100%;
    margin-left: 0;
    margin-top: 0.25rem;
  }

  .nav-cta .btn {
    width: 100%;
  }

  .nav-link.active::after {
    display: none;
  }

  /* Hero */
  .hero-title {
    font-size: clamp(1.75rem, 8vw, 2.25rem);
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

  /* Grids to single column */
  .programs-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .student-life-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

  .footer-bottom-links {
    gap: 1rem;
  }

  /* Contact */
  .contact-card,
  .contact-whatsapp-card {
    padding: 1.5rem;
  }

  /* Back to top */
  .back-to-top {
    bottom: 1.25rem;
    right: 1.25rem;
    width: 2.75rem;
    height: 2.75rem;
  }

  /* Lightbox */
  .lightbox {
    padding: 1rem;
  }

  .lightbox-close {
    top: 1rem;
    right: 1rem;
    width: 2.5rem;
    height: 2.5rem;
  }
}

/* ============================================================
   RESPONSIVE: SMALL MOBILE (< 375px)
   ============================================================ */
@media (max-width: 374px) {
  .header-logo-text {
    font-size: 0.95rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .about-card,
  .program-card,
  .benefit-card,
  .student-life-card {
    padding: 1.5rem;
  }
}

/* ============================================================
   RESPONSIVE: LARGE DESKTOP (1440px+)
   ============================================================ */
@media (min-width: 1440px) {
  .hero-title {
    font-size: 4rem;
  }

  .hero-content {
    max-width: 56rem;
  }
}