:root {
  --brand: #0f766e;
  --brand-dark: #115e59;
  --brand-soft: #e6f4f2;
  --accent: #d97706;
  --bg: #f7f8f7;
  --card: #ffffff;
  --text: #1c2523;
  --muted: #5b6b67;
  --line: #e2e8e6;
  --ok: #15803d;
  --warn: #b45309;
  --bad: #b91c1c;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 22, .06), 0 4px 16px rgba(16, 24, 22, .05);
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand: #2dd4bf;
    --brand-dark: #5eead4;
    --brand-soft: #12302d;
    --accent: #fbbf24;
    --bg: #0f1514;
    --card: #172120;
    --text: #e7eeec;
    --muted: #9fb0ab;
    --line: #26332f;
    --ok: #4ade80;
    --warn: #fbbf24;
    --bad: #f87171;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: 'IBM Plex Sans Arabic', system-ui, -apple-system, 'Segoe UI', Tahoma, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  font-size: 17px;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 920px; margin: 0 auto; padding: 0 16px; }
h1, h2, h3 { line-height: 1.4; }
h1 { font-size: 1.75rem; margin: .4em 0 .3em; }
h2 { font-size: 1.3rem; margin-top: 1.8em; }
h3 { font-size: 1.08rem; }

/* En-tête */
.site-header { background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; flex-wrap: wrap; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.4rem; color: var(--text); letter-spacing: 0; }
.logo:hover { text-decoration: none; }
.logo-svg { display: block; flex: none; }
.main-nav { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; }
.main-nav a { color: var(--muted); padding: 6px 10px; border-radius: 8px; white-space: nowrap; font-size: .95rem; }
.main-nav a:hover { background: var(--brand-soft); color: var(--brand); text-decoration: none; }
@media (max-width: 640px) {
  .site-header { position: static; }
  .header-inner { min-height: 56px; }
  .main-nav { width: 100%; padding-bottom: 8px; }
}

/* Fil d'Ariane */
.crumbs { font-size: .85rem; color: var(--muted); margin-top: 16px; }
.crumbs a { color: var(--muted); }

/* Accueil */
.hero { text-align: center; padding: 40px 0 8px; }
.hero h1 { font-size: clamp(1.6rem, 5vw, 2.3rem); margin-bottom: .2em; }
.hero p { color: var(--muted); margin: 0 auto 22px; max-width: 520px; }
.search-box { position: relative; max-width: 560px; margin: 0 auto; }
.search-box svg { position: absolute; right: 18px; top: 50%; transform: translateY(-50%); color: var(--muted); pointer-events: none; }
.search { width: 100%; padding: 15px 50px 15px 18px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--text); font: inherit; box-shadow: var(--shadow); min-height: 54px; }
.search:focus { outline: 2px solid var(--brand); outline-offset: 2px; }
.today { display: inline-flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 6px 10px; margin: 18px auto 0; padding: 8px 18px; border-radius: 999px; background: var(--brand-soft); color: var(--text); font-size: .95rem; }
.today:hover { text-decoration: none; filter: brightness(.98); }
.today span { color: var(--muted); }
.today .sep { opacity: .5; }
.cat-title { scroll-margin-top: 80px; font-size: 1.15rem; color: var(--muted); font-weight: 700; margin: 34px 0 12px; }
.pop-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.pop-tile { display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 10px; color: var(--text); font-weight: 700; box-shadow: var(--shadow); transition: border-color .15s, transform .15s; line-height: 1.5; }
.pop-tile:hover { border-color: var(--brand); transform: translateY(-2px); text-decoration: none; }
.pop-tile .ticon { width: 52px; height: 52px; border-radius: 16px; }
@media (max-width: 640px) { .pop-grid { grid-template-columns: repeat(2, 1fr); } }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.tool-card { display: flex; gap: 14px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; color: var(--text); box-shadow: var(--shadow); transition: border-color .15s, transform .15s; }
.tool-card:hover { border-color: var(--brand); transform: translateY(-1px); text-decoration: none; }
.tool-card strong { display: block; font-size: 1.02rem; line-height: 1.5; }
.tool-card span { color: var(--muted); font-size: .88rem; line-height: 1.5; display: block; }
.ticon { flex: none; display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; color: var(--c); background: color-mix(in srgb, var(--c) 12%, transparent); }
@media (prefers-color-scheme: dark) { .ticon { color: color-mix(in srgb, var(--c) 55%, white); background: color-mix(in srgb, var(--c) 28%, transparent); } }

/* Outil */
.tool-head { display: flex; align-items: center; gap: 12px; margin-top: 6px; }
.tool-head h1 { margin: .3em 0; font-size: clamp(1.4rem, 4.6vw, 1.85rem); }
.lead { color: var(--muted); margin-top: 0; }
.tool { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); margin: 16px 0; }
.row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 12px; align-items: end; }
.row.three { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 640px) { .row.three { grid-template-columns: repeat(2, 1fr); } }
label { display: block; font-weight: 600; font-size: .95rem; margin-bottom: 4px; }
input, select { width: 100%; padding: 11px 12px; border: 1px solid var(--line); border-radius: 10px; font: inherit; background: var(--bg); color: var(--text); min-height: 46px; }
input:focus, select:focus { outline: 2px solid var(--brand); outline-offset: 1px; border-color: transparent; }
.tabs { display: flex; gap: 6px; background: var(--bg); padding: 4px; border-radius: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.tabs button { flex: 1; border: 0; background: transparent; padding: 9px 12px; border-radius: 9px; font: inherit; color: var(--muted); cursor: pointer; min-width: 110px; }
.tabs button.on { background: var(--card); color: var(--brand); font-weight: 700; box-shadow: var(--shadow); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; background: var(--brand); color: #fff; border: 0; padding: 12px 22px; border-radius: 10px; font: inherit; font-weight: 700; cursor: pointer; min-height: 48px; }
.btn:hover { background: var(--brand-dark); }
.btn.ghost { background: transparent; color: var(--brand); border: 1px solid var(--line); }
.btn.full { width: 100%; }
.hint { font-size: .85rem; color: var(--muted); }
.error { color: var(--bad); font-weight: 600; }

/* Résultat */
.result { margin-top: 18px; background: var(--brand-soft); border-radius: 14px; padding: 18px; scroll-margin-top: 80px; }
.result > p:first-child { margin-top: 0; }
.result .stat { background: var(--card); }
.result.pop { animation: pop .25s ease-out; }
@keyframes pop { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .result.pop { animation: none; } }
.big { font-size: 1.6rem; font-weight: 700; color: var(--brand); line-height: 1.5; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; margin: 14px 0; }
.stat { background: var(--brand-soft); border-radius: 12px; padding: 12px; text-align: center; }
.stat b { display: block; font-size: 1.25rem; }
.stat small { color: var(--muted); }
.badge { display: inline-block; padding: 2px 12px; border-radius: 999px; font-weight: 700; font-size: .95rem; }
.badge.ok { background: color-mix(in srgb, var(--ok) 15%, transparent); color: var(--ok); }
.badge.warn { background: color-mix(in srgb, var(--warn) 15%, transparent); color: var(--warn); }
.badge.bad { background: color-mix(in srgb, var(--bad) 15%, transparent); color: var(--bad); }
.share { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.share button, .share a { flex: 1; min-width: 110px; }
table.res { width: 100%; border-collapse: collapse; margin: 10px 0; }
table.res td, table.res th { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: right; }
table.res th { color: var(--muted); font-weight: 600; width: 45%; }

/* GPA */
.course { display: grid; grid-template-columns: 2fr 1fr 1fr auto; gap: 8px; margin-bottom: 8px; align-items: end; }
.course button { min-height: 46px; border: 1px solid var(--line); background: var(--bg); border-radius: 10px; color: var(--bad); cursor: pointer; padding: 0 12px; font: inherit; }
@media (max-width: 520px) { .course { grid-template-columns: 2fr 1fr auto; } .course .c-name { grid-column: 1 / -1; } }

/* Contenu */
.content { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 4px 22px 18px; margin: 20px 0; }
.content p, .content li { color: var(--text); }
.note { background: var(--brand-soft); border-radius: 12px; padding: 12px 16px; font-size: .95rem; }
.faq details { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq summary { cursor: pointer; font-weight: 700; }
.faq details p { margin: 8px 0 0; }
.related { margin: 24px 0; }

/* Pied de page */
.site-footer { background: var(--card); border-top: 1px solid var(--line); margin-top: 40px; padding: 26px 0 10px; }
.footer-inner { display: grid; grid-template-columns: 1.3fr 1.4fr .8fr; gap: 28px; }
.footer-inner p { color: var(--muted); max-width: 320px; font-size: .95rem; }
.footer-inner nav { display: flex; flex-direction: column; gap: 2px; font-size: .93rem; }
.footer-inner nav strong { margin-bottom: 6px; }
.footer-tools { display: grid !important; grid-template-columns: 1fr 1fr; column-gap: 16px; align-content: start; }
.footer-tools strong { grid-column: 1 / -1; }
@media (max-width: 720px) { .footer-inner { grid-template-columns: 1fr; } }
.copyright { color: var(--muted); font-size: .85rem; }
[hidden] { display: none !important; }

/* Années de naissance */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-block; padding: 6px 14px; border-radius: 999px; background: var(--card); border: 1px solid var(--line); color: var(--text); font-weight: 600; min-width: 64px; text-align: center; }
.chip:hover { border-color: var(--brand); color: var(--brand); text-decoration: none; }
.pager { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }

/* Compte à rebours */
.countdown { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 6px 0 4px; }
.countdown div { background: var(--brand-soft); border-radius: 14px; padding: 16px 6px; text-align: center; }
.countdown b { display: block; font-size: clamp(1.7rem, 7vw, 2.6rem); color: var(--brand); line-height: 1.2; font-variant-numeric: tabular-nums; }
.countdown small { color: var(--muted); }

/* Calendriers */
.chip.on { background: var(--brand); border-color: var(--brand); color: #fff; }
.months { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; margin: 16px 0; }
.month { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; box-shadow: var(--shadow); }
.month h3 { margin: 0; font-size: 1.05rem; }
.month .hint { margin: 0 0 8px; font-size: .8rem; }
.cal { width: 100%; border-collapse: collapse; table-layout: fixed; }
.cal th { font-size: .7rem; color: var(--muted); font-weight: 600; padding: 4px 0; }
.cal td { text-align: center; padding: 4px 0; border-radius: 8px; line-height: 1.15; }
.cal td b { display: block; font-size: .95rem; }
.cal td small { display: block; font-size: .62rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cal td:nth-child(6) b, .cal td:nth-child(7) b { color: var(--accent); }
.cal td.now { background: var(--brand); }
.cal td.now b, .cal td.now small { color: #fff; }