:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --surface-2: #f0f0ec;
  --text: #1c1c1a;
  --muted: #62625c;
  --border: #e2e2dc;
  --accent: #1f6f5c;
  --accent-soft: #e3f1ec;
  --accent-text: #ffffff;
  --ok: #1f7a4d;
  --ok-soft: #e2f3e9;
  --err: #b3362b;
  --err-soft: #fbe7e4;
  --warn: #8a5a00;
  --warn-soft: #fbf0d9;
  --code-bg: #1e1f22;
  --code-text: #e6e6e3;
  --code-muted: #8f918b;
  --radius: 10px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131412;
    --surface: #1b1c1a;
    --surface-2: #232521;
    --text: #ecece8;
    --muted: #a3a49d;
    --border: #30322d;
    --accent: #5fc4a6;
    --accent-soft: #19332b;
    --accent-text: #0d1f19;
    --ok: #6fd39c;
    --ok-soft: #173023;
    --err: #f08a7e;
    --err-soft: #3a1d19;
    --warn: #e7b85a;
    --warn-soft: #362a12;
    --code-bg: #0e0f0e;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }

code { font-family: var(--mono); font-size: 0.88em; background: var(--surface-2); padding: 0.1em 0.35em; border-radius: 5px; overflow-wrap: anywhere; }

/* En-tête */
.topbar {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner { max-width: 1080px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; color: var(--text); text-decoration: none; white-space: nowrap; }
.brand svg { flex: none; }
.nav { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; margin-left: auto; min-width: 0; }
.nav::-webkit-scrollbar { display: none; }
.nav a { color: var(--muted); text-decoration: none; font-size: 14px; padding: 6px 10px; border-radius: 8px; white-space: nowrap; }
.nav a:hover { background: var(--surface-2); color: var(--text); }

.status { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; padding: 4px 10px; border-radius: 999px; background: var(--surface-2); color: var(--muted); white-space: nowrap; }
.status::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.status.up { background: var(--ok-soft); color: var(--ok); }
.status.down { background: var(--err-soft); color: var(--err); }

main { max-width: 1080px; margin: 0 auto; padding: 0 16px 64px; }

/* Accroche */
.hero { padding: 48px 0 24px; display: grid; gap: 28px; }
.hero h1 { font-size: clamp(28px, 5vw, 42px); line-height: 1.15; margin: 0 0 12px; letter-spacing: -0.02em; }
.hero p { margin: 0; color: var(--muted); font-size: 18px; max-width: 60ch; }
.hero .cta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 600 15px var(--sans); padding: 10px 16px; border-radius: 9px; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface); color: var(--text); text-decoration: none;
}
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.primary:hover { filter: brightness(1.08); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

/* Sections */
section { padding: 32px 0; border-top: 1px solid var(--border); }
section > h2 { font-size: 24px; margin: 0 0 6px; letter-spacing: -0.01em; }
section > .lead { color: var(--muted); margin: 0 0 20px; max-width: 70ch; }
h3 { font-size: 17px; margin: 24px 0 8px; }

.grid-2 { display: grid; gap: 20px; }
@media (min-width: 860px) { .grid-2 { grid-template-columns: 1fr 1fr; } }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; min-width: 0; }
.card h3 { margin-top: 0; }
.card-foot { font-size: 14px; color: var(--muted); margin: 12px 0 0; }
.flush { margin: 0; }
.spaced { margin-top: 20px; }

/* Schéma */
.flow { display: grid; gap: 8px; list-style: none; padding: 0; margin: 0; counter-reset: step; }
.flow li { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; position: relative; }
.flow li strong { display: block; font-size: 15px; }
.flow li span { color: var(--muted); font-size: 14px; }
.flow li:not(:last-child)::after { content: "↓"; position: absolute; left: 50%; bottom: -17px; transform: translateX(-50%); color: var(--muted); font-size: 14px; z-index: 1; }
@media (min-width: 860px) {
  .flow { grid-template-columns: repeat(5, 1fr); gap: 22px; }
  .flow li:not(:last-child)::after { content: "→"; left: auto; right: -17px; bottom: auto; top: 50%; transform: translateY(-50%); }
}

/* Code */
.code { position: relative; background: var(--code-bg); color: var(--code-text); border-radius: var(--radius); margin: 12px 0; min-width: 0; }
.code pre { margin: 0; padding: 16px; overflow-x: auto; font: 13.5px/1.55 var(--mono); }
.code .copy {
  position: absolute; top: 8px; right: 8px; font: 12px var(--sans); color: var(--code-muted);
  background: transparent; border: 1px solid #3a3c38; border-radius: 6px; padding: 3px 8px; cursor: pointer;
}
.code .copy:hover { color: var(--code-text); }
.c-cm { color: var(--code-muted); }
.c-str { color: #9fd8a6; }
.c-kw { color: #f0b37e; }

.tabs { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; border-bottom: 1px solid var(--border); }
.tabs button { font: 600 14px var(--sans); color: var(--muted); background: none; border: none; padding: 8px 12px; cursor: pointer; border-bottom: 2px solid transparent; white-space: nowrap; }
.tabs button[aria-selected="true"] { color: var(--accent); border-bottom-color: var(--accent); }
.tabpanel[hidden] { display: none; }

/* Tableaux */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 13px; color: var(--muted); font-weight: 600; background: var(--surface-2); }
tr:last-child td { border-bottom: none; }
td:first-child { white-space: nowrap; }

.pill { display: inline-block; font: 600 12px var(--mono); padding: 2px 7px; border-radius: 6px; background: var(--surface-2); }
.pill.ok { background: var(--ok-soft); color: var(--ok); }
.pill.err { background: var(--err-soft); color: var(--err); }
.pill.warn { background: var(--warn-soft); color: var(--warn); }

.note { border-left: 3px solid var(--warn); background: var(--warn-soft); padding: 12px 14px; border-radius: 0 8px 8px 0; margin: 16px 0; font-size: 15px; }
.note.info { border-color: var(--accent); background: var(--accent-soft); }

.chars { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 0; padding: 0; list-style: none; }
.chars li { font: 15px var(--mono); padding: 2px 8px; border-radius: 6px; border: 1px solid var(--border); background: var(--surface); }
.chars.ok li { border-color: color-mix(in srgb, var(--ok) 40%, transparent); }
.chars.bad li { border-color: color-mix(in srgb, var(--err) 40%, transparent); }

/* Bac à sable */
.playground { display: grid; gap: 20px; }
@media (min-width: 860px) { .playground { grid-template-columns: 1.1fr 0.9fr; align-items: start; } }
.field { display: grid; gap: 6px; margin-bottom: 16px; }
.field label { font-weight: 600; font-size: 14px; }
.field .hint { font-size: 13px; color: var(--muted); }
input[type="text"], input[type="password"], input[type="tel"], textarea {
  width: 100%; font: 15px var(--sans); color: var(--text); background: var(--bg);
  border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px;
}
textarea { min-height: 120px; resize: vertical; line-height: 1.5; }
input:focus, textarea:focus, .btn:focus-visible, .tabs button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.check { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--muted); }

.meter { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 13.5px; color: var(--muted); margin-top: 4px; }
.meter b { color: var(--text); font-weight: 600; }
.meter .enc-ucs2 { color: var(--warn); }
.meter .over { color: var(--err); }
.bar { height: 4px; background: var(--surface-2); border-radius: 4px; overflow: hidden; margin-top: 6px; }
.bar > i { display: block; height: 100%; width: 0; background: var(--accent); transition: width 0.15s; }
.bar.ucs2 > i { background: var(--warn); }
.culprits { font-size: 13px; color: var(--warn); margin-top: 4px; min-height: 1.2em; }

.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.result { margin: 0; min-height: 120px; }
.result-head { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--muted); margin-bottom: 8px; }

footer { max-width: 1080px; margin: 0 auto; padding: 24px 16px 40px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--border); }

@media (max-width: 760px) {
  html { scroll-padding-top: 104px; }
  .topbar-inner { flex-wrap: wrap; gap: 6px 12px; padding-bottom: 6px; }
  .topbar .status { margin-left: auto; }
  .nav { order: 3; flex: 1 0 100%; margin: 0 -16px; padding: 0 12px; }
}

@media (max-width: 640px) {
  .code:not(.result) pre { padding-top: 40px; }
  .hero { padding-top: 32px; }
  .hero p { font-size: 16px; }
  section { padding: 26px 0; }
  .card { padding: 16px; }
  th, td { padding: 9px 10px; }
}