/* ============================================================================
   Cambridge Student Blogs — shared design system
   Used by the hub (/student-blog/), the Studio and every student page.
   Themes are plain CSS variables on .sb-theme-<name>; a student's own accent
   colour overrides --accent.
   ============================================================================ */
:root {
  --font-ui: "Outfit", "Noto Sans Tamil", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-read: "Fraunces", "Noto Serif Tamil", Georgia, "Times New Roman", serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --navy: #0b1b36; --navy-2: #12294c; --gold: #d6a23a; --gold-2: #f3cf72;
  --radius: 22px; --radius-sm: 14px;
  --ease: cubic-bezier(.2, .8, .2, 1);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font-ui); line-height: 1.55; overflow-x: hidden; }
html { overflow-x: hidden; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; }
a { color: inherit; }
.sb-sr { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ── themes ───────────────────────────────────────────────────────────── */
.sb-theme, .sb-theme-aurora {
  --bg: #070d1f; --bg2: #0e1b3a; --fg: #eef2ff; --muted: #a5b0d6; --card: rgba(255,255,255,.06); --card-solid: #111c3a;
  --line: rgba(255,255,255,.12); --accent: #8b7bff; --accent2: #2de2c6; --glow: rgba(139,123,255,.45); --on-accent: #0a0f22;
  --aurora: radial-gradient(60% 50% at 15% 10%, rgba(139,123,255,.45), transparent 70%), radial-gradient(50% 45% at 85% 0%, rgba(45,226,198,.35), transparent 70%), radial-gradient(60% 60% at 60% 100%, rgba(255,110,196,.22), transparent 70%);
  color-scheme: dark;
}
.sb-theme-paper {
  --bg: #f7f3ea; --bg2: #efe8d8; --fg: #1d1a16; --muted: #6d655a; --card: #fffdf8; --card-solid: #fffdf8;
  --line: rgba(29,26,22,.12); --accent: #b4462b; --accent2: #1d1a16; --glow: rgba(180,70,43,.18); --on-accent: #fff;
  --aurora: radial-gradient(70% 50% at 10% 0%, rgba(180,70,43,.10), transparent 70%);
  color-scheme: light;
}
.sb-theme-neon {
  --bg: #050507; --bg2: #0d0d14; --fg: #f4f4f6; --muted: #9a9aab; --card: rgba(255,255,255,.04); --card-solid: #101018;
  --line: rgba(196,255,61,.18); --accent: #c4ff3d; --accent2: #22d3ee; --glow: rgba(196,255,61,.35); --on-accent: #050507;
  --aurora: radial-gradient(40% 40% at 80% 10%, rgba(34,211,238,.25), transparent 70%), radial-gradient(50% 50% at 10% 90%, rgba(196,255,61,.18), transparent 70%);
  color-scheme: dark;
}
.sb-theme-garden {
  --bg: #f1f5ec; --bg2: #e2ead8; --fg: #1f2d1c; --muted: #5d6b58; --card: #fbfdf8; --card-solid: #fbfdf8;
  --line: rgba(31,45,28,.12); --accent: #2f7d4f; --accent2: #e3a83b; --glow: rgba(47,125,79,.22); --on-accent: #fff;
  --aurora: radial-gradient(60% 50% at 90% 0%, rgba(227,168,59,.18), transparent 70%), radial-gradient(60% 50% at 0% 20%, rgba(47,125,79,.16), transparent 70%);
  color-scheme: light;
}
.sb-theme-ocean {
  --bg: #04192b; --bg2: #072a45; --fg: #e6f6ff; --muted: #8fb4cc; --card: rgba(255,255,255,.06); --card-solid: #0a2e4a;
  --line: rgba(125,211,252,.18); --accent: #38bdf8; --accent2: #5eead4; --glow: rgba(56,189,248,.4); --on-accent: #04192b;
  --aurora: radial-gradient(60% 50% at 20% 0%, rgba(56,189,248,.35), transparent 70%), radial-gradient(60% 50% at 100% 60%, rgba(94,234,212,.22), transparent 70%);
  color-scheme: dark;
}
.sb-theme-sunset {
  --bg: #fff4ec; --bg2: #ffe4d2; --fg: #3a1c14; --muted: #8a5a4a; --card: #fffaf6; --card-solid: #fffaf6;
  --line: rgba(58,28,20,.12); --accent: #f0562f; --accent2: #e8327c; --glow: rgba(240,86,47,.25); --on-accent: #fff;
  --aurora: radial-gradient(60% 50% at 0% 0%, rgba(240,86,47,.22), transparent 70%), radial-gradient(60% 50% at 100% 10%, rgba(232,50,124,.18), transparent 70%);
  color-scheme: light;
}
.sb-theme-mono {
  --bg: #ffffff; --bg2: #f3f3f3; --fg: #0a0a0a; --muted: #6b6b6b; --card: #ffffff; --card-solid: #fff;
  --line: rgba(0,0,0,.14); --accent: #0a0a0a; --accent2: #0a0a0a; --glow: rgba(0,0,0,.08); --on-accent: #fff;
  --aurora: none;
  color-scheme: light;
}
.sb-theme-candy {
  --bg: #fdf2fb; --bg2: #f5e6ff; --fg: #3b1846; --muted: #8b6596; --card: #fffaff; --card-solid: #fffaff;
  --line: rgba(59,24,70,.12); --accent: #d946ef; --accent2: #6366f1; --glow: rgba(217,70,239,.25); --on-accent: #fff;
  --aurora: radial-gradient(50% 50% at 90% 0%, rgba(99,102,241,.18), transparent 70%), radial-gradient(60% 50% at 0% 30%, rgba(217,70,239,.18), transparent 70%);
  color-scheme: light;
}
.sb-themed { background: var(--bg); color: var(--fg); }
.sb-themed ::selection { background: var(--accent); color: var(--on-accent); }

/* ── shared atoms ─────────────────────────────────────────────────────── */
.sb-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; padding: 0 22px;
  border-radius: 999px; border: 1px solid transparent; cursor: pointer; font-weight: 600; font-size: 1rem; text-decoration: none;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), opacity .2s;
  -webkit-tap-highlight-color: transparent;
}
.sb-btn:active { transform: scale(.97); }
.sb-btn:disabled { opacity: .5; cursor: not-allowed; }
.sb-btn-primary { background: var(--accent); color: var(--on-accent); box-shadow: 0 10px 30px -10px var(--glow); }
.sb-btn-primary:hover { box-shadow: 0 16px 40px -12px var(--glow); transform: translateY(-1px); }
.sb-btn-ghost { background: transparent; color: var(--fg); border-color: var(--line); }
.sb-btn-ghost:hover { background: var(--card); }
.sb-btn-sm { min-height: 38px; padding: 0 16px; font-size: .9rem; }
.sb-chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 999px; font-size: .8rem; font-weight: 600; background: var(--card); border: 1px solid var(--line); color: var(--fg); }
.sb-glass { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); backdrop-filter: blur(18px) saturate(1.2); -webkit-backdrop-filter: blur(18px) saturate(1.2); }
.sb-muted { color: var(--muted); }
.sb-toast {
  position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 30px); opacity: 0; z-index: 9999;
  background: #0b1020; color: #fff; padding: 12px 20px; border-radius: 999px; font-size: .92rem; font-weight: 500;
  box-shadow: 0 20px 50px -20px rgba(0,0,0,.6); transition: all .35s var(--ease); pointer-events: none; max-width: calc(100vw - 32px); text-align: center;
}
.sb-toast.show { opacity: 1; transform: translate(-50%, 0); }
.sb-toast.err { background: #b42318; }
.sb-toast.ok { background: #136c3a; }
.sb-reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.sb-reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .sb-reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; }
}

/* ============================================================================
   ARTICLE (rendered post) — .sbr-*
   ============================================================================ */
.sbr-article { font-family: var(--font-read); font-size: 1.16rem; line-height: 1.78; color: var(--fg); overflow-wrap: anywhere; }
.sbr-article > * + * { margin-top: 1.1em; }
.sbr-article p { margin: 0; }
.sbr-article p.center { text-align: center; }
.sbr-article h2, .sbr-article h3 { font-family: var(--font-ui); line-height: 1.2; letter-spacing: -.01em; margin: 1.6em 0 .2em; }
.sbr-article h2 { font-size: 1.7rem; }
.sbr-article h3 { font-size: 1.3rem; }
.sbr-article a { color: var(--accent); text-underline-offset: 3px; }
.sbr-article mark { background: color-mix(in srgb, var(--accent2) 35%, transparent); color: inherit; padding: 0 .15em; border-radius: 4px; }
.sbr-article ul, .sbr-article ol { padding-left: 1.4em; margin: 0; }
.sbr-article li + li { margin-top: .35em; }
.sbr-article blockquote { margin: 1.6em 0; padding: .2em 0 .2em 1.1em; border-left: 4px solid var(--accent); font-size: 1.3rem; font-style: italic; }
.sbr-article blockquote cite { display: block; margin-top: .5em; font-size: .95rem; font-style: normal; color: var(--muted); font-family: var(--font-ui); }
.sbr-callout { display: flex; gap: 14px; padding: 18px 20px; border-radius: var(--radius-sm); background: color-mix(in srgb, var(--accent) 12%, transparent); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); font-family: var(--font-ui); font-size: 1.05rem; }
.sbr-callout .e { font-size: 1.6rem; line-height: 1; }
.sbr-fig { margin: 1.6em 0; position: relative; }
.sbr-fig .ph { position: relative; border-radius: var(--radius-sm); overflow: hidden; background: var(--bg2); }
.sbr-fig img { width: 100%; height: auto; -webkit-user-drag: none; user-select: none; -webkit-touch-callout: none; }
.sbr-fig .shield { position: absolute; inset: 0; }
.sbr-fig figcaption { font-family: var(--font-ui); font-size: .88rem; color: var(--muted); margin-top: .6em; text-align: center; }
.sbr-fig.wide { margin-left: -6%; margin-right: -6%; }
.sbr-fig.center { max-width: 62%; margin-left: auto; margin-right: auto; }
.sbr-fig.left, .sbr-fig.right { width: 46%; margin-top: .3em; margin-bottom: .8em; }
.sbr-fig.left { float: left; margin-right: 1.3em; }
.sbr-fig.right { float: right; margin-left: 1.3em; }
.sbr-article::after { content: ""; display: block; clear: both; }
@media (max-width: 640px) {
  .sbr-fig.left, .sbr-fig.right, .sbr-fig.center { float: none; width: auto; max-width: none; margin-left: 0; margin-right: 0; }
  .sbr-fig.wide { margin-left: 0; margin-right: 0; }
  .sbr-article { font-size: 1.08rem; }
}
.sbr-gallery { display: grid; gap: 10px; grid-template-columns: repeat(3, 1fr); margin: 1.6em 0; }
.sbr-gallery.c2 { grid-template-columns: repeat(2, 1fr); }
.sbr-gallery .sbr-fig { margin: 0; }
.sbr-gallery .ph { aspect-ratio: 1 / 1; }
.sbr-gallery .ph img { width: 100%; height: 100%; object-fit: cover; }
@media (max-width: 520px) { .sbr-gallery { grid-template-columns: repeat(2, 1fr); } }
.sbr-embed { position: relative; aspect-ratio: 16 / 9; border-radius: var(--radius-sm); overflow: hidden; background: #000; margin: 1.6em 0; }
.sbr-embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.sbr-embed-cap { font-family: var(--font-ui); font-size: .88rem; color: var(--muted); text-align: center; margin-top: -.8em; }
.sbr-code { font-family: var(--font-mono); font-size: .9rem; line-height: 1.6; background: #0b1020; color: #e6edf7; padding: 16px 18px; border-radius: var(--radius-sm); overflow-x: auto; white-space: pre; position: relative; }
.sbr-code .lang { position: absolute; top: 8px; right: 12px; font-size: .7rem; text-transform: uppercase; letter-spacing: .1em; color: #8892a6; font-family: var(--font-ui); }
.sbr-hr { border: 0; text-align: center; margin: 2em 0 !important; }
.sbr-hr::before { content: "✦ ✦ ✦"; letter-spacing: 1em; color: var(--muted); font-size: .9rem; }
.sbr-cite { font-family: var(--font-ui); font-size: .72em; vertical-align: super; line-height: 0; }
.sbr-cite a { text-decoration: none; font-weight: 700; padding: 0 .1em; }
.sbr-refs { margin-top: 2.4em !important; padding-top: 1.2em; border-top: 1px solid var(--line); font-family: var(--font-ui); font-size: .95rem; clear: both; }
.sbr-refs h4 { margin: 0 0 .6em; font-size: .78rem; text-transform: uppercase; letter-spacing: .14em; color: var(--muted); }
.sbr-refs ol { margin: 0; padding-left: 1.5em; }
.sbr-refs li { margin: .35em 0; scroll-margin-top: 90px; }
.sbr-refs li:target { background: color-mix(in srgb, var(--accent) 18%, transparent); border-radius: 6px; }
.sbr-refs a { color: var(--accent); word-break: break-all; }
.sbr-capsule { text-align: center; padding: 48px 22px; border-radius: var(--radius); border: 1px dashed var(--line); background: var(--card); font-family: var(--font-ui); }
.sbr-capsule .lock { font-size: 3rem; }
.sbr-capsule .when { font-size: 1.3rem; font-weight: 700; margin: 6px 0; }
.sbr-capsule .count { display: flex; justify-content: center; gap: 12px; margin-top: 16px; flex-wrap: wrap; }
.sbr-capsule .count span { min-width: 74px; padding: 10px; border-radius: 14px; background: var(--bg2); }
.sbr-capsule .count b { display: block; font-size: 1.4rem; }
.sbr-capsule .count small { font-size: .7rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }

/* ── post cards (page, hub, preview) ── */
.sbr-cards { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.sbr-card { position: relative; display: flex; flex-direction: column; border-radius: var(--radius); overflow: hidden; background: var(--card); border: 1px solid var(--line); text-decoration: none; color: var(--fg); transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s; }
.sbr-card:hover { transform: translateY(-4px); box-shadow: 0 24px 50px -28px var(--glow); border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.sbr-card .cv { aspect-ratio: 16 / 10; background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 60%, var(--bg2)), color-mix(in srgb, var(--accent2) 50%, var(--bg2))); position: relative; overflow: hidden; }
.sbr-card .cv img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); -webkit-user-drag: none; }
.sbr-card:hover .cv img { transform: scale(1.04); }
.sbr-card .cv .emo { position: absolute; inset: 0; display: grid; place-items: center; font-size: 3rem; opacity: .9; }
.sbr-card .bd { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.sbr-card .cat { font-size: .72rem; text-transform: uppercase; letter-spacing: .14em; color: var(--accent); font-weight: 700; }
.sbr-card h3 { margin: 0; font-size: 1.18rem; line-height: 1.3; font-family: var(--font-ui); }
.sbr-card p { margin: 0; font-size: .92rem; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.sbr-card .meta { margin-top: auto; display: flex; gap: 12px; flex-wrap: wrap; align-items: center; font-size: .8rem; color: var(--muted); }
.sbr-card .by { display: flex; align-items: center; gap: 8px; font-weight: 600; color: var(--fg); }
.sbr-card .by img, .sbr-card .by .av { width: 26px; height: 26px; border-radius: 50%; object-fit: cover; background: var(--accent); color: var(--on-accent); display: grid; place-items: center; font-size: .7rem; }
.sbr-ribbons { position: absolute; top: 10px; left: 10px; display: flex; gap: 6px; flex-wrap: wrap; z-index: 2; }
.sbr-ribbon { font-family: var(--font-ui); font-size: .72rem; font-weight: 700; padding: 5px 10px; border-radius: 999px; background: rgba(10,14,30,.78); color: #fff; backdrop-filter: blur(8px); }
.sbr-ribbon.principals_pick { background: linear-gradient(135deg, #d6a23a, #f3cf72); color: #3a2600; }
.sbr-ribbon.students_choice { background: linear-gradient(135deg, #6366f1, #22d3ee); }
.sbr-ribbon.parents_favourite { background: linear-gradient(135deg, #f43f5e, #fb923c); }
.sbr-lock { position: absolute; top: 10px; right: 10px; z-index: 2; }
/* list layout */
.sbr-cards.list { grid-template-columns: 1fr; }
.sbr-cards.list .sbr-card { flex-direction: row; }
.sbr-cards.list .sbr-card .cv { width: 34%; min-width: 140px; aspect-ratio: auto; }
@media (max-width: 560px) { .sbr-cards.list .sbr-card { flex-direction: column; } .sbr-cards.list .sbr-card .cv { width: 100%; aspect-ratio: 16/10; } }
/* magazine layout: first card is a hero */
.sbr-cards.magazine { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.sbr-cards.magazine .sbr-card:first-child { grid-column: 1 / -1; display: grid; grid-template-columns: 1.3fr 1fr; }
.sbr-cards.magazine .sbr-card:first-child .cv { aspect-ratio: auto; min-height: 280px; }
.sbr-cards.magazine .sbr-card:first-child h3 { font-size: 1.8rem; font-family: var(--font-read); }
@media (max-width: 760px) { .sbr-cards.magazine .sbr-card:first-child { grid-template-columns: 1fr; } .sbr-cards.magazine .sbr-card:first-child .cv { min-height: 200px; } }

/* ── protection: student work on public pages ── */
.sb-protect, .sb-protect * { -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; }
.sb-protect input, .sb-protect textarea { -webkit-user-select: text; user-select: text; }
@media print {
  body.sb-noprint > * { display: none !important; }
  body.sb-noprint::after { content: "Printing is turned off to protect our students' work. Please read it online at cambridgeschoolsmadurai.com."; display: block; padding: 40px; font: 16px/1.5 sans-serif; }
}