/* ============================================================
   Lucton Chongqing — New Site Design System
   Based on framework mind map (重庆莱克顿网站框架.jpg)
   Color palette extracted from original design reference
   ============================================================ */

/* ---------- CSS Custom Properties (Design Tokens) ---------- */
:root {
  /* === Backgrounds === */
  --bg-page:        #efe8dc;  /* warm cream/beige — main page bg */
  --bg-topbar:      #f5f0e6;  /* slightly lighter — top info bar */
  --bg-card:        #ffffff;  /* white content cards */
  --bg-sidebar:     #162036;  /* deep navy — left sidebar & footer */
  --bg-footer:      #0d1826;  /* very dark navy — footer base */
  --bg-hero-overlay: rgba(22,32,54,0.72);  /* hero image overlay */

  /* === Section Accent Colors (from mind map) === */
  --accent-about:       #2a5558;  /* teal — 学校概况 / About Us */
  --accent-academic:    #485838;  /* olive green — 学术课程 / Academic */
  --accent-boarding:    #8c7850;  /* gold brown — 寄宿与校园生活 */
  --accent-living:      #703842;  /* burgundy/wine — 生活在重庆 */
  --accent-admissions:  #2c3a58;  /* navy blue — 招生 */
  --accent-news:        #8c7850;  /* gold brown — 新闻与故事 */

  /* === CTA Buttons === */
  --cta-primary-bg:     #9b7d52;   /* gold brown filled */
  --cta-primary-hover:  #8a6d44;
  --cta-secondary-bg:   transparent;
  --cta-secondary-border:#ffffff;
  --cta-secondary-text:  #ffffff;

  /* === Text Colors === */
  --text-primary:   #1a1a1a;
  --text-secondary: #555555;
  --text-light:     #888888;
  --text-on-dark:   #e8e4df;
  --text-on-accent: #ffffff;
  --text-muted:     #a09888;

  /* === Brand (legacy Lucton red, used sparingly) === */
  --brand:          #b12c39;

  /* === Borders & Dividers === */
  --border-light:   #ddd5c7;
  --border-subtle:  #e5dfd3;

  /* === Typography === */
  --font-base: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: "Noto Serif SC", "Playfair Display", Georgia, "Times New Roman", serif;
  --font-en: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* === Spacing Scale === */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  40px;
  --space-xxl: 64px;

  /* === Layout === */
  --sidebar-width: 300px;
  --max-width:     1280px;
  --nav-height:    72px;
  --topbar-height: 36px;

  /* === Radius === */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* === Shadows === */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.10);
  --shadow-lg:  0 8px 24px rgba(0,0,0,0.12);

  /* === Transitions === */
  --transition: 0.25s ease;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-base);
  color: var(--text-primary);
  background-color: var(--bg-page);
  line-height: 1.7;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
a:hover { opacity: 0.82; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }

/* ---------- Top Info Bar ---------- */
.top-bar {
  background: var(--bg-topbar);
  height: var(--topbar-height);
  font-size: 12px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
  z-index: 1000;
}
.top-bar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.top-bar-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.top-bar-left .school-name {
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}
.top-bar-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.top-bar a:hover { color: var(--accent-about); }
.lang-switch-top {
  display: flex;
  gap: 4px;
  font-weight: 600;
}
.lang-switch-top a {
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}
.lang-switch-top a.active {
  background: var(--accent-about);
  color: #fff;
}

/* ---------- Main Navigation Bar ---------- */
.site-nav {
  background: var(--bg-page);
  height: var(--nav-height);
  position: sticky;
  top: 0;
  z-index: 999;
  border-bottom: 1px solid var(--border-subtle);
  transition: box-shadow var(--transition), background var(--transition);
}
.site-nav.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(239,232,220,0.97);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
}
.brand img {
  height: 56px;
  width: auto;
  object-fit: contain;
  transition: height var(--transition);
}
.site-nav.scrolled .brand img { height: 44px; }

/* Nav Menu Items */
.nav-menu {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
}
.nav-menu > ul,
.nav-inner > ul {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
}
.nav-menu > ul > li,
.nav-inner > ul > li {
  position: relative;
}
.nav-menu > ul > li > a,
.nav-inner > ul > li > a {
  display: block;
  padding: 0 14px;
  line-height: var(--nav-height);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  position: relative;
  transition: color var(--transition);
}
.nav-menu > ul > li > a::after,
.nav-inner > ul > li > a::after {
  content: '';
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent-about);
  transition: width var(--transition);
}
.nav-menu > ul > li:hover > a::after,
.nav-inner > ul > li:hover > a::after,
.nav-menu > ul > li > a.current::after,
.nav-inner > ul > li > a.current::after {
  width: calc(100% - 28px);
}
.nav-menu > ul > li:hover > a,
.nav-inner > ul > li:hover > a { color: var(--accent-about); }
.nav-menu > ul > li > a.current,
.nav-inner > ul > li > a.current { color: var(--accent-about); font-weight: 700; }

/* Dropdown Menus */
.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--bg-sidebar);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 0.28s ease;
  z-index: 100;
  padding: var(--space-sm) 0;
}
.nav-menu > ul > li:hover > .dropdown,
.nav-inner > ul > li:hover > .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown li a {
  display: block;
  padding: 8px 20px;
  font-size: 13px;
  color: var(--text-on-dark);
  transition: background var(--transition), padding-left var(--transition);
}
.dropdown li a:hover {
  background: rgba(255,255,255,0.10);
  padding-left: 24px;
  color: #fff;
}
.dropdown li a.current {
  color: #fff;
  font-weight: 600;
}

/* CTA Buttons in Nav */
.nav-cta {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 20px;
  font-size: 13px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  font-family: var(--font-base);
  letter-spacing: 0.03em;
}
.btn-enquire {
  background: var(--cta-primary-bg);
  color: #fff;
  border: 2px solid var(--cta-primary-bg);
}
.btn-enquire:hover {
  background: var(--cta-primary-hover);
  border-color: var(--cta-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  opacity: 1;
}
.btn-apply {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--text-primary);
}
.btn-apply:hover {
  background: var(--text-primary);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  opacity: 1;
}

/* Language Switch in Nav */
.lang-switch {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
}
.lang-switch a { color: var(--text-secondary); padding: 4px 6px; }
.lang-switch a.active { color: var(--accent-about); border-bottom: 2px solid var(--accent-about); }
.lang-switch .sep { color: var(--border-light); }

/* Hamburger Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 6px;
  z-index: 1001;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  height: 520px;
  overflow: hidden;
  background: var(--bg-sidebar);
}
.hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(22,32,54,0.75) 0%, rgba(22,32,54,0.45) 60%, rgba(112,56,66,0.30) 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 0 8%;
}
.hero-content {
  max-width: 680px;
}
.hero-content h1 {
  font-family: var(--font-heading);
  font-size: 42px;
  color: #fff;
  margin-bottom: var(--space-md);
  letter-spacing: 0.01em;
  line-height: 1.25;
}
.hero-content p {
  font-size: 17px;
  color: rgba(255,255,255,0.88);
  margin-bottom: var(--space-xl);
  line-height: 1.65;
  max-width: 540px;
}
.hero-cta {
  display: flex;
  gap: var(--space-md);
}
.hero-cta .btn {
  padding: 12px 28px;
  font-size: 14px;
}

/* ---------- Main Layout (Sidebar + Content) ---------- */
.main-body {
  display: flex;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
  gap: var(--space-xl);
  align-items: flex-start;
}

/* Left Sidebar Navigation */
.page-sidebar {
  flex: 0 0 var(--sidebar-width);
  background: var(--bg-sidebar);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: sticky;
  top: calc(var(--nav-height) + var(--topbar-height) + 24px);
}
.sidebar-header {
  padding: var(--space-lg);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-header h3 {
  font-size: 15px;
  color: var(--text-on-dark);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.sidebar-header p {
  font-size: 12px;
  color: rgba(255,255,255,0.50);
  margin-top: 4px;
}
.sidebar-nav {
  padding: var(--space-sm) 0;
}
.sidebar-nav li a {
  display: flex;
  align-items: center;
  padding: 12px var(--space-lg);
  font-size: 14px;
  color: rgba(255,255,255,0.72);
  transition: all var(--transition);
  border-left: 3px solid transparent;
  gap: var(--space-sm);
}
.sidebar-nav li a:hover {
  background: rgba(255,255,255,0.06);
  color: #fff;
  border-left-color: var(--accent-about);
  padding-left: calc(var(--space-lg) + 4px);
  opacity: 1;
}
.sidebar-nav li a.active {
  background: rgba(255,255,255,0.10);
  color: #fff;
  font-weight: 600;
  border-left-color: var(--accent-about);
}
.sidebar-nav li .num {
  font-size: 11px;
  font-weight: 700;
  color: rgba(255,255,255,0.35);
  min-width: 24px;
  text-align: center;
  font-family: var(--font-en);
}

/* Content Area */
.page-content {
  flex: 1 1 0;
  min-width: 0;
}

/* Section Cards */
.section-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-xl);
  transition: box-shadow var(--transition);
}
.section-card:hover { box-shadow: var(--shadow-md); }
.card-header {
  padding: var(--space-md) var(--space-lg);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-header h2 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.card-header .card-icon {
  font-size: 20px;
  opacity: 0.80;
}
/* Each section's accent color */
.card-header.about       { background: var(--accent-about); }
.card-header.academic    { background: var(--accent-academic); }
.card-header.boarding    { background: var(--accent-boarding); }
.card-header.living      { background: var(--accent-living); }
.card-header.admissions  { background: var(--accent-admissions); }
.card-header.news        { background: var(--accent-news); }

.card-body {
  padding: var(--space-lg);
}
.card-body ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-sm);
}
.card-body ul li a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.card-body ul li a:hover {
  background: var(--bg-topbar);
  color: var(--text-primary);
  padding-left: 18px;
  opacity: 1;
}
.card-body ul li a::before {
  content: '›';
  font-weight: 700;
  color: var(--text-light);
  font-size: 16px;
  transition: color var(--transition);
}
.card-body ul li a:hover::before { color: var(--accent-about); }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
  padding: var(--space-sm) 0;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent-about); }
.breadcrumb span { margin: 0 6px; color: var(--border-light); }

/* ---------- Page Header (for sub-pages) ---------- */
.page-header {
  margin-bottom: var(--space-xl);
}
.page-header h1 {
  font-family: var(--font-heading);
  font-size: 32px;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}
.page-header .subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 640px;
}
.page-header.accent-bar {
  padding-bottom: var(--space-md);
  border-bottom: 3px solid;
  margin-bottom: var(--space-xl);
}
.page-header.accent-bar.about      { border-color: var(--accent-about); }
.page-header.accent-bar.academic   { border-color: var(--accent-academic); }
.page-header.accent-bar.boarding   { border-color: var(--accent-boarding); }
.page-header.accent-bar.living     { border-color: var(--accent-living); }
.page-header.accent-bar.admissions{ border-color: var(--accent-admissions); }
.page-header.accent-bar.news       { border-color: var(--accent-news); }

/* ---------- Content Blocks ---------- */
.content-block {
  margin-bottom: var(--space-xl);
}
.content-block h2 {
  font-size: 24px;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  position: relative;
  padding-left: 16px;
}
.content-block h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  border-radius: 2px;
}
.content-block h2.about-accent::before      { background: var(--accent-about); }
.content-block h2.academic-accent::before   { background: var(--accent-academic); }
.content-block h2.boarding-accent::before   { background: var(--accent-boarding); }
.content-block h2.living-accent::before     { background: var(--accent-living); }
.content-block h2.admissions-accent::before { background: var(--accent-admissions); }
.content-block h2.news-accent::before       { background: var(--accent-news); }

.content-block p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}
.content-block p:last-child { margin-bottom: 0; }

/* Image + Text Grid */
.img-text-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
  margin-bottom: var(--space-xl);
}
.img-text-grid.reverse { direction: rtl; }
.img-text-grid.reverse > * { direction: ltr; }
.img-text-grid figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.img-text-grid figure img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

/* Feature Cards Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.feature-card figure {
  height: 180px;
  overflow: hidden;
}
.feature-card figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.feature-card:hover figure img { transform: scale(1.05); }
.feature-card .fc-body {
  padding: var(--space-lg);
}
.feature-card .fc-body h3 {
  font-size: 17px;
  margin-bottom: var(--space-sm);
}
.feature-card .fc-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Stats Row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin: var(--space-xl) 0;
}
.stat-item {
  text-align: center;
  padding: var(--space-lg);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.stat-item .stat-num {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 800;
  color: var(--accent-about);
  line-height: 1.1;
}
.stat-item .stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

/* CTA Banner */
.cta-banner {
  background: var(--bg-sidebar);
  border-radius: var(--radius-lg);
  padding: var(--space-xxl) var(--space-xl);
  text-align: center;
  margin: var(--space-xl) 0;
  color: #fff;
}
.cta-banner h2 {
  font-family: var(--font-heading);
  font-size: 28px;
  margin-bottom: var(--space-md);
}
.cta-banner p {
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  margin-bottom: var(--space-lg);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.cta-banner .hero-cta { justify-content: center; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-footer);
  color: var(--text-on-dark);
  padding: var(--space-xxl) 0 var(--space-xl);
  margin-top: var(--space-xxl);
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-md);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: 13px;
  color: rgba(255,255,255,0.60);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: #fff; opacity: 1; }
.footer-col p {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  line-height: 1.7;
}
.footer-bottom {
  max-width: var(--max-width);
  margin: var(--space-xl) auto 0;
  padding: var(--space-lg) var(--space-lg) 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: rgba(255,255,255,0.35);
}

/* ---------- Mobile Menu Overlay ---------- */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--bg-sidebar);
  z-index: 2000;
  padding: var(--space-xxl) var(--space-xl);
  overflow-y: auto;
}
.mobile-menu .close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  color: #fff;
  font-size: 36px;
  cursor: pointer;
  line-height: 1;
}
.mobile-menu ul { margin-top: var(--space-xl); }
.mobile-menu ul li {
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.mobile-menu ul li > a {
  display: block;
  padding: var(--space-md) 0;
  font-size: 18px;
  font-weight: 600;
  color: #fff;
}
.mobile-menu ul li > a.active { color: var(--cta-primary-bg); }
.mobile-menu .sub {
  padding: var(--space-sm) 0 var(--space-md) var(--space-md);
  display: none;
}
.mobile-menu li.open .sub { display: block; }
.mobile-menu .sub a {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: rgba(255,255,255,0.65);
}
.mobile-menu .sub a:hover { color: #fff; }
.mobile-menu .lang {
  margin-top: var(--space-xl);
  display: flex;
  gap: var(--space-md);
}
.mobile-menu .lang a {
  padding: 8px 20px;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: rgba(255,255,255,0.70);
}
.mobile-menu .lang a.active {
  background: #fff;
  color: var(--bg-sidebar);
  border-color: #fff;
}

/* ---------- Responsive Breakpoints ---------- */

/* Tablet: 1024px and below */
@media (max-width: 1024px) {
  :root { --sidebar-width: 260px; }
  .footer-inner { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .img-text-grid { grid-template-columns: 1fr; }
  .hero-content h1 { font-size: 34px; }
  .hero { height: 420px; }
}

/* Small tablet / large phone: 900px */
@media (max-width: 900px) {
  .main-body { flex-direction: column; }
  .page-sidebar {
    position: static;
    width: 100%;
  }
  .sidebar-nav {
    display: flex;
    overflow-x: auto;
    padding: var(--space-sm);
    gap: 4px;
  }
  .sidebar-nav li a {
    white-space: nowrap;
    border-left: none;
    border-bottom: 3px solid transparent;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
  }
  .sidebar-nav li a.active {
    border-bottom-color: var(--accent-about);
    border-left-color: transparent;
  }
  .sidebar-nav li a:hover {
    border-left-color: transparent;
    background: rgba(255,255,255,0.06);
  }
  .sidebar-header { display: none; }
  .nav-cta { display: none; }
}

/* ---------- Header responsive shrink (prevent nav overflow) ---------- */
@media (max-width: 1280px) {
  .nav-inner { gap: 18px; padding: 0 20px; }
  .brand img { height: 50px; }
  .nav-menu > ul > li > a { padding: 0 11px; font-size: 13.5px; }
  .btn { padding: 8px 16px; font-size: 12.5px; }
}
@media (max-width: 1200px) {
  .nav-inner { gap: 14px; }
  .brand img { height: 46px; }
  .nav-menu > ul > li > a { padding: 0 9px; font-size: 13px; }
  .btn { padding: 7px 13px; font-size: 12px; }
  .lang-switch { font-size: 12px; }
  .lang-switch a { padding: 3px 5px; }
}
/* Narrow top bar: trim long text to avoid overlap */
@media (max-width: 768px) {
  .top-bar { font-size: 10px; }
  .top-bar-left span:not(.school-name) { display: none; }
  .top-bar-right span:not(.lang-switch-top) { display: none; }
  .top-bar-left .school-name { font-size: 11px; }
}

/* Mobile hamburger: 1100px */
@media (max-width: 1100px) {
  .nav-inner > ul,
  .nav-menu,
  .nav-menu > ul,
  .lang-switch { display: none; }
  .nav-toggle { display: flex; }
  .mobile-menu { display: block; }
  .mobile-menu.open { display: block; }
}

/* Phone: 600px */
@media (max-width: 600px) {
  :root { --nav-height: 60px; }
  .top-bar { display: none; }
  .hero { height: 360px; }
  .hero-content h1 { font-size: 26px; }
  .hero-content p { font-size: 14px; }
  .footer-inner { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .card-body ul { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .hero-cta { flex-direction: column; }
  .cta-banner { padding: var(--space-xl) var(--space-lg); }
  .cta-banner h2 { font-size: 22px; }
  .page-header h1 { font-size: 26px; }
  .nav-inner { padding: 0 var(--space-md); gap: var(--space-md); }
  .brand img { height: 44px; }
}

/* Utility classes */
.text-center { text-align: center; }
.mt-xl { margin-top: var(--space-xl); }
.mb-xl { margin-bottom: var(--space-xl); }
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}