/* bacstudents.com landing — same tokens as the app (lib/utils/app_style.dart). */
:root {
  --brand: #4c8dff;
  --accent: #9b7bff;
  --canvas: #0f1117;
  --surface: #171a22;
  --alt: #1f2430;
  --border: #2a303d;
  --text: #f2f4f8;
  --text2: #a2abbf;
  --text3: #6c7689;
  --gold: #fbbf24;
  --green: #34d399;
  --radius: 20px;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --brand: #0d6efd;
    --accent: #7c3aed;
    --canvas: #f6f7fb;
    --surface: #ffffff;
    --alt: #e6eaf2;
    --border: #cad1dd;
    --text: #11141d;
    --text2: #434b5c;
    --text3: #677086;
    --gold: #d97706;
    --green: #059669;
  }
}
:root[data-theme="light"] {
  --brand: #0d6efd;
  --accent: #7c3aed;
  --canvas: #f6f7fb;
  --surface: #ffffff;
  --alt: #e6eaf2;
  --border: #cad1dd;
  --text: #11141d;
  --text2: #434b5c;
  --text3: #677086;
  --gold: #d97706;
  --green: #059669;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--text);
  font: 17px/1.6 Rubik, system-ui, -apple-system, "Segoe UI", Tahoma, Arial, sans-serif;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

/* Header */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--canvas) 85%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav .wrap { display: flex; align-items: center; gap: 20px; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.logo img { width: 36px; height: 36px; border-radius: 10px; }
.links { display: flex; gap: 22px; color: var(--text2); font-size: 15px; margin-inline-start: auto; }
.links a:hover { color: var(--text); }
.lang { display: flex; gap: 4px; background: var(--alt); border-radius: 999px; padding: 3px; font-size: 13px; }
.lang a { padding: 4px 10px; border-radius: 999px; color: var(--text2); }
.lang a[aria-current="page"] { background: var(--surface); color: var(--text); font-weight: 600; }
@media (max-width: 860px) { .links { display: none; } .lang { margin-inline-start: auto; } }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  border-radius: 999px; padding: 12px 22px; font-weight: 600; border: 0; cursor: pointer;
  background: var(--brand); color: #fff; font: inherit; font-weight: 600; white-space: nowrap;
}
.btn.ghost { background: var(--alt); color: var(--text); }
.btn svg { width: 22px; height: 22px; flex: none; }
.btn.sm { padding: 8px 16px; font-size: 15px; }

/* Hero */
.hero { position: relative; padding: 72px 0 56px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -40% -20% auto; height: 720px; z-index: -1;
  background:
    radial-gradient(closest-side, color-mix(in srgb, var(--brand) 35%, transparent), transparent),
    radial-gradient(closest-side at 70% 60%, color-mix(in srgb, var(--accent) 30%, transparent), transparent);
  opacity: .55;
}
.hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.pill {
  display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--border);
  background: var(--surface); padding: 6px 14px; border-radius: 999px; color: var(--text2); font-size: 14px;
}
.pill b { color: var(--green); }
h1 { font-size: clamp(34px, 5.4vw, 58px); line-height: 1.12; margin: 18px 0 16px; letter-spacing: -.01em; }
h1 .grad {
  background: linear-gradient(90deg, var(--brand), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { color: var(--text2); font-size: 19px; max-width: 560px; margin: 0 0 28px; }
.ctas { display: flex; flex-wrap: wrap; gap: 12px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 40px; max-width: 600px; }
.stats div { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 14px; }
.stats b { display: block; font-size: 24px; }
.stats span { color: var(--text3); font-size: 14px; }
@media (max-width: 860px) {
  .hero { padding-top: 40px; }
  .hero .wrap { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}

/* Phone mockup (pure CSS, no screenshots to keep up to date) */
.phone {
  width: min(330px, 100%); margin: 0 auto; aspect-ratio: 9 / 18.5;
  border-radius: 44px; padding: 12px; background: #05060a;
  box-shadow: 0 40px 80px rgba(0,0,0,.45), inset 0 0 0 2px #2a303d;
}
.screen {
  height: 100%; border-radius: 34px; overflow: hidden; background: #0f1117; color: #f2f4f8;
  display: flex; flex-direction: column; gap: 10px; padding: 18px 12px; font-size: 13px;
}
.screen .bar { display: flex; justify-content: space-between; align-items: center; font-weight: 700; font-size: 15px; padding: 0 4px; }
.screen .tabs { display: flex; gap: 6px; }
.screen .tabs span { background: #1f2430; color: #a2abbf; border-radius: 999px; padding: 4px 10px; font-size: 11px; }
.screen .tabs span.on { background: #4c8dff; color: #fff; }
.mpost { background: #171a22; border: 1px solid #2a303d; border-radius: 16px; padding: 10px; }
.mpost .who { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.mpost .av { width: 28px; height: 28px; border-radius: 50%; background: linear-gradient(135deg, #4c8dff, #9b7bff); }
.mpost .line { height: 8px; border-radius: 4px; background: #2a303d; margin-top: 8px; }
.mpost .img { height: 92px; border-radius: 10px; margin-top: 8px; background: linear-gradient(135deg, #1e3a8a, #6d28d9); display: flex; align-items: center; justify-content: center; font-size: 28px; }
.mpost .acts { display: flex; justify-content: space-around; color: #a2abbf; margin-top: 8px; font-size: 12px; }
.mcard { background: linear-gradient(135deg, #4c8dff, #9b7bff); border-radius: 16px; padding: 14px; text-align: center; font-weight: 600; }
.mcard small { display: block; opacity: .8; font-weight: 400; margin-top: 4px; }

/* Sections */
section.block { padding: 72px 0; }
.kicker { color: var(--brand); font-weight: 600; font-size: 15px; letter-spacing: .02em; }
h2 { font-size: clamp(28px, 3.6vw, 40px); line-height: 1.2; margin: 8px 0 12px; }
.sub { color: var(--text2); max-width: 640px; margin: 0 0 36px; }
.center { text-align: center; }
.center .sub { margin-inline: auto; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 900px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid { grid-template-columns: 1fr; } }
.feat {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; transition: transform .2s, border-color .2s;
}
.feat:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--brand) 50%, var(--border)); }
.feat .ic {
  width: 48px; height: 48px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  background: color-mix(in srgb, var(--brand) 16%, transparent); color: var(--brand); margin-bottom: 14px;
}
.feat .ic svg { width: 26px; height: 26px; }
.feat h3 { margin: 0 0 6px; font-size: 19px; }
.feat p { margin: 0; color: var(--text2); font-size: 16px; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.panel {
  border-radius: 28px; padding: 36px; border: 1px solid var(--border);
  background: linear-gradient(160deg, color-mix(in srgb, var(--brand) 14%, var(--surface)), var(--surface));
}
.panel.alt { background: linear-gradient(160deg, color-mix(in srgb, var(--accent) 16%, var(--surface)), var(--surface)); }
.panel h3 { font-size: 26px; margin: 6px 0 10px; }
.panel ul { list-style: none; padding: 0; margin: 18px 0 26px; display: grid; gap: 10px; }
.panel li { display: flex; gap: 10px; color: var(--text2); }
.panel li::before { content: "✓"; color: var(--green); font-weight: 700; }

.share {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 8px;
}
@media (max-width: 760px) { .share { grid-template-columns: repeat(2, 1fr); } }
.share div { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 18px; min-width: 0; }
.share code { display: block; color: var(--brand); font-size: 14px; margin-top: 6px; direction: ltr; text-align: start; overflow-wrap: anywhere; }

.final {
  border-radius: 32px; padding: 56px 24px; text-align: center; color: #fff;
  background: linear-gradient(135deg, #0d6efd, #7c3aed);
}
.final h2 { color: #fff; }
.final p { opacity: .9; max-width: 560px; margin: 0 auto 28px; }
.final .ctas { justify-content: center; }
.final .btn { background: #fff; color: #11141d; }
.final .btn.ghost { background: rgba(255,255,255,.16); color: #fff; }

footer { border-top: 1px solid var(--border); padding: 40px 0; color: var(--text3); font-size: 15px; margin-top: 72px; }
footer .wrap { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 24px; }
footer h4 { color: var(--text); margin: 0 0 10px; font-size: 15px; }
footer a { display: block; padding: 3px 0; color: var(--text2); }
footer a:hover { color: var(--text); }
.socials { display: flex; gap: 10px; margin-top: 14px; }
.socials a { width: 40px; height: 40px; border-radius: 12px; background: var(--alt); display: flex; align-items: center; justify-content: center; }
.socials svg { width: 20px; height: 20px; }
@media (max-width: 700px) { footer .wrap { grid-template-columns: 1fr; } }

[dir="rtl"] .lead, [dir="rtl"] .sub { line-height: 1.8; }
@media (max-width: 440px) {
  .nav .wrap { gap: 10px; }
  .nav .logo span { display: none; }
}