/* ============================================================
   Alfa Learning — style.css
   Design system: Modern Trust & Future Tech
   Colors: Sapphire #0F172A | Cyan #06B6D4 | Orange #F97316
   Type: Plus Jakarta Sans / Inter
   ============================================================ */

:root {
  --sapphire: #0F172A;
  --sapphire-2: #111c33;
  --sapphire-3: #1e293b;
  --cyan: #06B6D4;
  --cyan-soft: #22d3ee;
  --orange: #F97316;
  --orange-soft: #fb923c;
  --ink: #e2e8f0;
  --ink-dim: #94a3b8;
  --ink-faint: #64748b;
  --white: #f8fafc;
  --glass: rgba(15, 23, 42, 0.55);
  --glass-border: rgba(34, 211, 238, 0.18);
  --glass-light: rgba(255, 255, 255, 0.06);
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 22px 60px -20px rgba(2, 6, 23, 0.75);
  --shadow-cyan: 0 0 0 1px rgba(6, 182, 212, 0.35), 0 16px 50px -16px rgba(6, 182, 212, 0.45);
  --maxw: 1180px;
  --font: 'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--sapphire);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* Abstract tech background that lives behind everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 600px at 85% -10%, rgba(6, 182, 212, 0.18), transparent 60%),
    radial-gradient(700px 500px at 0% 20%, rgba(249, 115, 22, 0.10), transparent 55%),
    radial-gradient(1000px 800px at 50% 120%, rgba(6, 182, 212, 0.10), transparent 60%),
    linear-gradient(180deg, #0b1222 0%, #0F172A 40%, #0b1222 100%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(34, 211, 238, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 211, 238, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 30%, #000, transparent 80%);
  opacity: 0.5;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 { line-height: 1.15; font-weight: 800; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.4rem, 5.2vw, 4.2rem); }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
p { color: var(--ink-dim); }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.25rem); }
.section { padding: 96px 0; }
.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-head .eyebrow { margin-bottom: 14px; }

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.text-cyan { color: var(--cyan); }
.text-orange { color: var(--orange); }
.text-gradient {
  background: linear-gradient(100deg, var(--cyan) 0%, var(--cyan-soft) 45%, var(--orange) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.98rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(100deg, var(--orange), var(--orange-soft));
  color: #1a1206;
  box-shadow: 0 14px 34px -12px rgba(249, 115, 22, 0.6);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 22px 48px -14px rgba(249, 115, 22, 0.7); }
.btn-cyan {
  background: linear-gradient(100deg, var(--cyan), var(--cyan-soft));
  color: #04222a;
  box-shadow: 0 14px 34px -12px rgba(6, 182, 212, 0.55);
}
.btn-cyan:hover { transform: translateY(-3px); box-shadow: 0 22px 48px -14px rgba(6, 182, 212, 0.7); }
.btn-ghost {
  background: var(--glass-light);
  border: 1px solid var(--glass-border);
  color: var(--ink);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { transform: translateY(-3px); border-color: var(--cyan); color: var(--cyan); }
.btn-lg { padding: 16px 32px; font-size: 1.05rem; }

/* ---------- Glassmorphism ---------- */
.glass {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  box-shadow: var(--shadow);
}

/* ============================================================
   NAVBAR
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(8, 13, 26, 0.72);
  border-bottom: 1px solid rgba(34, 211, 238, 0.12);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 1.18rem; letter-spacing: -0.02em; }
.brand-logo {
  width: 56px; height: 56px; border-radius: 12px; object-fit: cover; object-position: center;
  flex-shrink: 0; box-shadow: 0 0 0 1px rgba(34,211,238,.25), 0 6px 18px -8px rgba(6,182,212,.5);
}
.brand { gap: 14px; font-size: 1.25rem; }
.brand small { letter-spacing: 0.22em; }
.risk-badge {
  display: inline-block; margin: -6px 0 14px; padding: 5px 12px;
  border-radius: 999px; font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.04em; text-transform: uppercase;
}
.risk-badge.high { background: rgba(248, 113, 113, 0.12); color: #f87171; border: 1px solid rgba(248, 113, 113, 0.35); }
.risk-badge.low { background: rgba(52, 211, 153, 0.10); color: #34d399; border: 1px solid rgba(52, 211, 153, 0.35); }
.card h3 small { display: block; font-size: 0.72rem; font-weight: 600; color: var(--ink-faint); letter-spacing: 0.02em; margin-top: 2px; }
.brand small { display: block; font-size: 0.6rem; font-weight: 600; color: var(--ink-faint); letter-spacing: 0.18em; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 9px 16px; border-radius: 999px; font-weight: 600; font-size: 0.95rem; color: var(--ink-dim);
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--ink); background: var(--glass-light); }
.nav-links a.active { color: var(--cyan); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.hamburger { display: none; background: none; border: 1px solid var(--glass-border); border-radius: 10px; padding: 9px 11px; cursor: pointer; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 4px 0; transition: .3s; }
.hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 12px 16px 22px;
  background: rgba(8, 13, 26, 0.96);
  border-bottom: 1px solid rgba(34, 211, 238, 0.12);
}
.mobile-menu.open { display: flex; }
.mobile-menu a { padding: 14px 12px; border-radius: 10px; color: var(--ink-dim); font-weight: 600; }
.mobile-menu a:hover { background: var(--glass-light); color: var(--ink); }
.mobile-menu .btn { justify-content: center; margin-top: 8px; }

/* ============================================================
   HERO
   ============================================================ */
.hero { position: relative; min-height: 92vh; display: flex; align-items: center; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background-size: cover; background-position: center;
  transform: scale(1.05);
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(8,13,26,0.92) 0%, rgba(8,13,26,0.74) 45%, rgba(8,13,26,0.45) 100%),
              radial-gradient(700px 500px at 80% 20%, rgba(6,182,212,0.18), transparent 60%);
}
.hero .container { position: relative; z-index: 2; padding-top: 60px; padding-bottom: 60px; }
.hero-content { max-width: 760px; }
.hero h1 { margin-bottom: 22px; }
.hero .lead { font-size: clamp(1.1rem, 1.8vw, 1.4rem); max-width: 640px; margin-bottom: 34px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 40px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 34px; }
.hero-stats .stat .num { font-size: 1.9rem; font-weight: 800; color: var(--cyan); }
.hero-stats .stat .lbl { font-size: 0.85rem; color: var(--ink-faint); }

/* Marquee ribbon under hero */
.ribbon { border-block: 1px solid rgba(34,211,238,0.12); background: rgba(8,13,26,0.5); overflow: hidden; }
.ribbon-track { display: flex; gap: 48px; padding: 14px 0; white-space: nowrap; animation: scrollx 28s linear infinite; }
.ribbon-track span { color: var(--ink-faint); font-weight: 600; letter-spacing: 0.04em; }
@keyframes scrollx { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ============================================================
   PILLARS / CARDS
   ============================================================ */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card { padding: 30px; transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease; position: relative; overflow: hidden; }
.card:hover { transform: translateY(-6px); border-color: var(--cyan); box-shadow: var(--shadow-cyan); }
.card .icon {
  width: 52px; height: 52px; border-radius: 13px; display: grid; place-items: center;
  background: linear-gradient(140deg, rgba(6,182,212,0.18), rgba(249,115,22,0.14));
  border: 1px solid var(--glass-border); margin-bottom: 18px;
}
.icon svg { width: 26px; height: 26px; color: var(--cyan); }
.card h3 { margin-bottom: 10px; }
.card p { font-size: 0.97rem; }
.card .more { margin-top: 16px; display: inline-flex; align-items: center; gap: 8px; color: var(--cyan); font-weight: 700; font-size: 0.92rem; }
.card .more:hover { gap: 12px; }

/* Image card (campus / careers) */
.img-card { padding: 0; overflow: hidden; }
.img-card .media { height: 220px; background-size: cover; background-position: center; }
.img-card .body { padding: 24px; }
.img-card .body h3 { margin-bottom: 8px; }
.img-card .tag { position: absolute; top: 16px; left: 16px; z-index: 2; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 6px 12px; border-radius: 999px; background: rgba(8,13,26,0.7); border: 1px solid var(--glass-border); color: var(--cyan); }

/* ============================================================
   COMPARISON TABLE (fast-track)
   ============================================================ */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--glass-border); }
table.compare { width: 100%; border-collapse: collapse; min-width: 640px; background: var(--glass); backdrop-filter: blur(10px); }
table.compare th, table.compare td { padding: 16px 20px; text-align: left; border-bottom: 1px solid rgba(34,211,238,0.10); }
table.compare thead th { background: linear-gradient(100deg, rgba(6,182,212,0.18), rgba(249,115,22,0.10)); font-size: 0.95rem; color: var(--white); }
table.compare tbody th { color: var(--ink); font-weight: 700; }
table.compare td { color: var(--ink-dim); font-size: 0.95rem; }
table.compare tbody tr:hover { background: rgba(34,211,238,0.05); }
.badge { display: inline-block; padding: 4px 10px; border-radius: 999px; font-size: 0.78rem; font-weight: 700; }
.badge-fast { background: rgba(6,182,212,0.18); color: var(--cyan); }
.badge-focus { background: rgba(249,115,22,0.16); color: var(--orange); }

/* ============================================================
   SPLIT FEATURE
   ============================================================ */
.split { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
.split.reversed .media { order: 2; }
.split .media { height: 420px; border-radius: var(--radius); background-size: cover; background-position: center; border: 1px solid var(--glass-border); box-shadow: var(--shadow); }
.split ul.checklist { margin-top: 18px; display: grid; gap: 12px; }
.split ul.checklist li { display: flex; gap: 12px; align-items: flex-start; color: var(--ink); }
.split ul.checklist li::before { content: "✓"; color: var(--cyan); font-weight: 900; }

/* ============================================================
   TESTIMONIALS
   ============================================================ */
.quote { padding: 30px; display: flex; flex-direction: column; gap: 16px; }
.quote .stars { color: var(--orange); letter-spacing: 2px; }
.quote p { color: var(--ink); font-style: italic; }
.quote .who { display: flex; align-items: center; gap: 12px; margin-top: auto; }
.quote .who .av { width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(140deg, var(--cyan), var(--orange)); display: grid; place-items: center; font-weight: 800; color: #04222a; }
.quote .who .meta b { display: block; color: var(--white); font-size: 0.95rem; }
.quote .who .meta span { font-size: 0.82rem; color: var(--ink-faint); }

/* ============================================================
   CONTACT FORM
   ============================================================ */
.form-card { padding: 36px; max-width: 720px; margin: 0 auto; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 0.88rem; font-weight: 600; margin-bottom: 7px; color: var(--ink); }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 15px; border-radius: var(--radius-sm);
  background: rgba(8,13,26,0.6); border: 1px solid var(--glass-border); color: var(--ink);
  font-family: inherit; font-size: 0.98rem; transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(6,182,212,0.18); }
.field .err { color: var(--orange); font-size: 0.8rem; margin-top: 6px; display: none; }
.field.invalid .err { display: block; }
.field.invalid input, .field.invalid select { border-color: var(--orange); }
.form-success { display: none; padding: 16px 20px; border-radius: var(--radius-sm); background: rgba(6,182,212,0.14); border: 1px solid rgba(6,182,212,0.4); color: var(--cyan-soft); font-weight: 600; margin-bottom: 18px; }
.form-success.show { display: block; }

/* ============================================================
   CTA + FOOTER
   ============================================================ */
.cta-band { text-align: center; padding: 64px 32px; border-radius: var(--radius); position: relative; overflow: hidden; }
.cta-band::before { content: ""; position: absolute; inset: 0; background: radial-gradient(600px 300px at 50% 0%, rgba(6,182,212,0.22), transparent 70%); }
.cta-band > * { position: relative; }
.cta-band h2 { margin-bottom: 14px; }
.cta-band p { max-width: 560px; margin: 0 auto 26px; }

footer { border-top: 1px solid rgba(34,211,238,0.12); padding: 56px 0 28px; margin-top: 40px; background: rgba(8,13,26,0.6); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 36px; }
.footer-grid h4 { font-size: 0.95rem; margin-bottom: 14px; color: var(--white); }
.footer-grid a { display: block; color: var(--ink-faint); font-size: 0.92rem; padding: 5px 0; transition: color .2s; }
.footer-grid a:hover { color: var(--cyan); }
.footer-about p { font-size: 0.92rem; }
.legal { border-top: 1px solid rgba(34,211,238,0.10); padding-top: 22px; font-size: 0.8rem; color: var(--ink-faint); line-height: 1.6; }
.legal b { color: var(--ink-dim); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; margin-top: 18px; font-size: 0.82rem; color: var(--ink-faint); }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ============================================================
   RESPONSIVE — mobile-first fixes
   ============================================================ */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 28px; }
  .split.reversed .media { order: 0; }
  .split .media { height: 320px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  /* Nav */
  .nav-links, .nav-actions .desktop-only { display: none; }
  .hamburger { display: block; padding: 11px 13px; }
  .nav-inner { height: 72px; }
  .brand { font-size: 1.08rem; gap: 10px; }
  .brand-logo { width: 46px; height: 46px; border-radius: 10px; }

  /* Layout */
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .section-head { margin-bottom: 40px; }
  .container { padding: 0 18px; }

  /* Hero */
  .hero { min-height: auto; padding-top: 32px; align-items: flex-start; }
  .hero .container { padding-top: 24px; padding-bottom: 48px; }
  .hero-stats { gap: 20px 28px; }
  .hero-stats .stat .num { font-size: 1.5rem; }

  /* Ribbon */
  .ribbon-track { gap: 28px; animation-duration: 20s; }

  /* Cards */
  .card { padding: 22px; }
  .card p { font-size: 0.95rem; }
  .risk-badge { display: block; text-align: left; margin-bottom: 12px; white-space: normal; line-height: 1.4; }
  .quote { padding: 22px; }

  /* Split media */
  .split .media { height: 240px; }
  .img-card .media { height: 180px; }

  /* Comparison table scrolls horizontally with hint */
  .table-wrap { -webkit-overflow-scrolling: touch; }
  table.compare th, table.compare td { padding: 12px 14px; font-size: 0.9rem; }

  /* Form */
  .form-card { padding: 24px 18px; }
  .field input, .field select, .field textarea { font-size: 16px; } /* stops iOS zoom-on-focus */

  /* CTA + footer */
  .cta-band { padding: 44px 20px; }
  footer { padding: 44px 0 22px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .footer-grid a { font-size: 0.95rem; padding: 7px 0; }
  .footer-bottom { flex-direction: column; text-align: center; align-items: center; }
  .legal { font-size: 0.78rem; }
}

@media (max-width: 480px) {
  .hero-cta .btn, .btn-lg { width: 100%; justify-content: center; }
  .hero-cta { gap: 12px; margin-bottom: 30px; }
  h1 { font-size: clamp(2rem, 8.5vw, 2.4rem); }
  h2 { font-size: clamp(1.55rem, 6.5vw, 1.9rem); }
  .hero-stats { gap: 16px 22px; }
  .brand-logo { width: 42px; height: 42px; }
  .card .icon { width: 46px; height: 46px; border-radius: 11px; margin-bottom: 14px; }
  .icon svg { width: 23px; height: 23px; }
  .quote .who .av { width: 38px; height: 38px; }
}

/* ---------- Language switcher ---------- */
.lang-switch{display:flex;gap:6px;align-items:center;margin-right:18px}
.lang-btn{background:transparent;border:1px solid rgba(148,163,184,.35);color:var(--ink-faint,#94a3b8);
  font-size:.72rem;font-weight:600;letter-spacing:.04em;padding:5px 10px;border-radius:999px;cursor:pointer;
  transition:all .2s ease;font-family:inherit}
.lang-btn:hover{color:var(--cyan,#06B6D4);border-color:var(--cyan,#06B6D4)}
.lang-btn.active{background:rgba(6,182,212,.12);color:var(--cyan,#06B6D4);border-color:var(--cyan,#06B6D4)}

@media(max-width:980px){
  .lang-switch{margin-right:0}
}
@media(max-width:980px){
  header nav ~ .lang-switch{margin-right:0}
}
@media(max-width:760px){
  header > .container > .lang-switch,
  .nav-actions .lang-switch{display:none}
  .mobile-menu .lang-switch{display:flex;margin-top:14px;justify-content:center;width:100%}
}
@media(max-width:480px){
  .mobile-menu .lang-switch{flex-wrap:wrap}
}