:root {
  --brand: #1565C0;
  --teal: #14BA9B;
  --text: #1F2933;
  --muted: #5B6470;
  --bg: #F4F6FA;
  --card: #FFFFFF;
  --line: #E3E7ED;
  --scan: #1E88E5; --official: #F4511E; --photo: #8E24AA; --pdf: #E53935;
  --share: #00897B; --util: #43A047; --files: #3949AB;
  --radius: 18px;
}
@media (prefers-color-scheme: dark) {
  :root { --text: #E6E9EE; --muted: #A9B1BC; --bg: #10141A; --card: #1A2029; --line: #2A313B; --brand: #7FB3F5; }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Noto Sans Devanagari", sans-serif;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* Header */
header.top { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; gap: 12px; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--text); text-decoration: none; }
.logo img { width: 36px; height: 36px; border-radius: 10px; }
nav.links { margin-left: auto; display: flex; gap: 20px; }
nav.links a { color: var(--muted); text-decoration: none; font-weight: 600; font-size: 15px; }
nav.links a:hover { color: var(--text); }
@media (max-width: 720px) { nav.links { display: none; } }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 12px; font-weight: 700; text-decoration: none; }
.btn.primary { background: var(--brand); color: #fff; }
@media (prefers-color-scheme: dark) { .btn.primary { background: #1565C0; } }
.btn.ghost { border: 1.5px solid var(--line); color: var(--text); }
header.top .btn { padding: 8px 14px; font-size: 14px; }

/* Hero */
.hero { padding: 56px 0 40px; }
.hero .wrap { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 40px; align-items: center; }
.hero h1 { font-size: clamp(32px, 5vw, 50px); line-height: 1.1; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero h1 span { background: linear-gradient(90deg, var(--brand), var(--teal)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: 19px; color: var(--muted); margin: 0 0 24px; max-width: 34em; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero .note { color: var(--muted); font-size: 14px; margin-top: 14px; }
@media (max-width: 820px) { .hero .wrap { grid-template-columns: 1fr; } .hero { padding-top: 32px; } }

.phone { border-radius: 28px; overflow: hidden; border: 6px solid #1F2933; box-shadow: 0 24px 50px rgba(15, 30, 60, 0.18); background: #fff; max-width: 300px; margin: 0 auto; }
.phone.small { max-width: 240px; border-width: 5px; border-radius: 24px; }

/* Sections */
section { padding: 48px 0; }
section h2 { font-size: clamp(26px, 3.6vw, 34px); margin: 0 0 8px; letter-spacing: -0.01em; }
section p.sub { color: var(--muted); margin: 0 0 28px; max-width: 46em; }

.groups { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.group { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.group h3 { margin: 0 0 10px; display: flex; align-items: center; gap: 10px; font-size: 18px; }
.group h3 i { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }
.group ul { margin: 0; padding-left: 18px; color: var(--muted); }
.group li { margin: 3px 0; }
.group li b { color: var(--text); font-weight: 600; }

/* Showcase rows */
.showcase { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
.show { text-align: center; }
.show h3 { font-size: 17px; margin: 14px 0 4px; }
.show p { color: var(--muted); font-size: 15px; margin: 0; }

/* CSC band */
.band { background: linear-gradient(135deg, #1565C0, #14BA9B); color: #fff; border-radius: 24px; padding: 32px; }
.band h2 { color: #fff; }
.band .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 20px; }
.band .item { background: rgba(255, 255, 255, 0.14); border-radius: 14px; padding: 16px; }
.band .item b { display: block; font-size: 17px; margin-bottom: 4px; }

.langs { display: flex; flex-wrap: wrap; gap: 10px; }
.langs span { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 8px 16px; font-weight: 600; }

details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 14px 18px; margin-bottom: 10px; }
details summary { font-weight: 700; cursor: pointer; }
details p { color: var(--muted); margin: 8px 0 0; }

footer { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--muted); font-size: 14px; }
footer .wrap { display: grid; gap: 12px; }
footer nav { display: flex; flex-wrap: wrap; gap: 18px; }
footer a { color: var(--muted); }

/* Plain text pages (source, 404) */
.page { max-width: 760px; margin: 0 auto; padding: 32px 16px 48px; }
.page h1 { font-size: 30px; margin: 0 0 8px; }
.page table { width: 100%; border-collapse: collapse; margin: 12px 0 24px; font-size: 15px; }
.page th, .page td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }

/* Phones: two screenshots per row instead of one. */
@media (max-width: 560px) {
  .showcase { grid-template-columns: 1fr 1fr; gap: 16px; }
  .phone.small { border-width: 4px; border-radius: 18px; }
  .show h3 { font-size: 15px; }
  .show p { font-size: 13px; }
}