/* CalculCFE : socle design.
   Direction : corporate fintech FR, trust-first. Un seul accent (cobalt).
   Thème : clair par défaut, sombre via prefers-color-scheme. */

:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #eef0f4;
  --ink: #14213c;
  --ink-2: #46516b;
  --ink-3: #6b768f;
  --line: #dde1e9;
  --line-strong: #c6ccd8;
  --accent: #2447e0;
  --accent-ink: #ffffff;
  --accent-soft: #e8ecfc;
  --accent-deep: #1b37b4;
  --good: #0d7a4f;
  --good-soft: #e2f3ec;
  --warn: #9a5b00;
  --warn-soft: #f9efdd;
  --shadow: 0 1px 2px rgba(20, 33, 60, 0.05), 0 12px 32px -16px rgba(20, 33, 60, 0.18);
  --radius: 14px;
  --radius-s: 9px;
  --font-sans: "Outfit", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1424;
    --surface: #161d31;
    --surface-2: #1d2540;
    --ink: #eef1f8;
    --ink-2: #aab4cd;
    --ink-3: #7e89a6;
    --line: #29324e;
    --line-strong: #394363;
    --accent: #7691ff;
    --accent-ink: #0e1424;
    --accent-soft: #212c52;
    --accent-deep: #93a8ff;
    --good: #4cc492;
    --good-soft: #16303a;
    --warn: #e3a44a;
    --warn-soft: #33290f;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 32px -16px rgba(0, 0, 0, 0.55);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 20px; }

/* ---------- Nav ---------- */

.nav {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 28px; height: 64px; }
.brand { font-weight: 700; font-size: 1.14rem; color: var(--ink); letter-spacing: -0.02em; display: inline-flex; align-items: baseline; }
.brand:hover { text-decoration: none; }
.brand em { font-style: normal; color: var(--accent); }
.nav-links { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--ink-2); font-size: 0.94rem; font-weight: 500; }
.nav-links a:hover { color: var(--ink); text-decoration: none; }
.nav-cta {
  background: var(--accent); color: var(--accent-ink) !important;
  padding: 9px 16px; border-radius: 999px; font-weight: 600;
}
.nav-cta:hover { background: var(--accent-deep); }
@media (max-width: 720px) {
  .nav-links a:not(.nav-cta) { display: none; }
}

/* ---------- Boutons ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: inherit; font-size: 1rem; font-weight: 600;
  border: none; cursor: pointer; border-radius: 999px;
  padding: 13px 24px; white-space: nowrap;
  transition: background 0.18s ease, transform 0.12s ease;
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-deep); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line-strong); }
.btn-ghost:hover { border-color: var(--ink-3); text-decoration: none; }
.btn-block { width: 100%; }

/* ---------- Hero ---------- */

.hero { padding: 56px 0 72px; }
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: 56px; align-items: center;
}
.hero h1 {
  font-size: clamp(2rem, 4.4vw, 3.3rem);
  line-height: 1.06; letter-spacing: -0.03em; font-weight: 700;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero-sub { margin-top: 18px; font-size: 1.12rem; color: var(--ink-2); max-width: 34rem; }
.hero-source { margin-top: 22px; font-size: 0.86rem; color: var(--ink-3); }
.hero-source strong { color: var(--ink-2); font-weight: 600; }
@media (max-width: 900px) {
  .hero { padding: 36px 0 56px; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
}

/* ---------- Carte formulaire / simulateur ---------- */

.sim-card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 28px;
}
.sim-card h2, .sim-card .sim-title { font-size: 1.06rem; font-weight: 700; letter-spacing: -0.01em; }
.sim-note { font-size: 0.84rem; color: var(--ink-3); margin-top: 4px; }
.field { margin-top: 18px; display: flex; flex-direction: column; gap: 7px; }
.field label { font-size: 0.9rem; font-weight: 600; color: var(--ink-2); }
.field input[type="text"], .field input[type="number"], .field select {
  font-family: inherit; font-size: 1rem; color: var(--ink);
  background: var(--surface); border: 1px solid var(--line-strong);
  border-radius: var(--radius-s); padding: 12px 14px; width: 100%;
}
.field input::placeholder { color: var(--ink-3); }
.field input:focus, .field select:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
.field .hint { font-size: 0.8rem; color: var(--ink-3); }
.field .error { display: none; font-size: 0.84rem; color: #b3382c; }
.field.has-error input { border-color: #b3382c; }
.field.has-error .error { display: block; }
/* Autocomplétion communes */
.field { position: relative; }
.ac-list {
  position: absolute; top: 100%; left: 0; right: 0; z-index: 30;
  margin-top: 4px; padding: 6px; list-style: none;
  background: var(--surface); border: 1px solid var(--line-strong);
  border-radius: var(--radius-s); box-shadow: var(--shadow);
  max-height: 300px; overflow-y: auto;
}
.ac-list li {
  padding: 9px 12px; border-radius: 6px; cursor: pointer;
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
}
.ac-list li strong { font-weight: 600; font-size: 0.95rem; }
.ac-list li small { color: var(--ink-3); font-size: 0.8rem; white-space: nowrap; }
.ac-list li:hover, .ac-list li.is-active { background: var(--accent-soft); }

/* Bulles d'information (terme technique -> explication) */
.info { position: relative; display: inline-flex; vertical-align: 1px; margin-left: 5px; }
.info-btn {
  width: 16px; height: 16px; padding: 0; border-radius: 999px;
  border: 1px solid var(--line-strong); background: var(--surface-2);
  color: var(--ink-3); font-family: Georgia, serif; font-style: italic; font-weight: 700;
  font-size: 11px; line-height: 1; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.info-btn:hover, .info.open .info-btn {
  color: var(--accent-ink); background: var(--accent); border-color: var(--accent);
}
.info-pop {
  position: absolute; bottom: calc(100% + 9px); left: 50%; transform: translateX(-50%);
  width: max-content; max-width: min(300px, 82vw); z-index: 60;
  background: var(--surface); border: 1px solid var(--line-strong);
  border-radius: var(--radius-s); box-shadow: var(--shadow);
  padding: 11px 14px; font-size: 0.83rem; line-height: 1.5; color: var(--ink-2);
  font-weight: 400; font-style: normal; letter-spacing: 0; text-transform: none;
  text-align: left; white-space: normal;
  display: none;
}
.info-pop::after {
  content: ""; position: absolute; top: 100%; left: 50%; margin-left: -5px;
  border: 5px solid transparent; border-top-color: var(--line-strong);
}
.info.open .info-pop { display: block; }
@media (prefers-reduced-motion: no-preference) {
  .info.open .info-pop { animation: info-fade 0.15s ease; }
}
@keyframes info-fade {
  from { opacity: 0; }
}
.info-pop strong { color: var(--ink); }

.check { margin-top: 16px; display: flex; align-items: flex-start; gap: 10px; font-size: 0.9rem; color: var(--ink-2); }
.check input { accent-color: var(--accent); width: 17px; height: 17px; margin-top: 2px; flex: none; }
.check label { cursor: pointer; }
.sim-card .btn { margin-top: 22px; }

/* Résultat */
.sim-result { display: none; margin-top: 22px; border-top: 1px solid var(--line); padding-top: 18px; }
.sim-result.is-visible { display: block; }
.sim-result .amount { font-size: 2.1rem; font-weight: 600; letter-spacing: -0.02em; }
.sim-result .amount small { font-size: 1rem; color: var(--ink-3); font-weight: 500; }
.sim-result .detail { margin-top: 8px; font-size: 0.88rem; color: var(--ink-2); }
.sim-result .actions { margin-top: 16px; display: flex; gap: 12px; flex-wrap: wrap; }
.tag-demo {
  display: inline-block; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.04em;
  color: var(--warn); background: var(--warn-soft);
  padding: 3px 9px; border-radius: 999px; vertical-align: middle;
}
.tag-src {
  display: inline-block; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.04em;
  color: var(--accent-deep); background: var(--accent-soft);
  padding: 3px 9px; border-radius: 999px; vertical-align: middle;
}

/* ---------- Sections ---------- */

.section { padding: 72px 0; }
.section-alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); letter-spacing: -0.02em; line-height: 1.15; max-width: 40rem; }
.section .lead { margin-top: 14px; color: var(--ink-2); max-width: 40rem; font-size: 1.04rem; }
@media (max-width: 720px) { .section { padding: 52px 0; } }

/* Pédagogie : formule */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; margin-top: 8px; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; gap: 32px; } }
/* Les enfants de grille doivent pouvoir rétrécir sous la largeur de leur contenu
   (sinon un tableau min-width 560px force un scroll horizontal de la page sur mobile) */
.hero-grid > *, .split > *, .kpis > *, .best-grid > *, .city-grid > * { min-width: 0; }
.table-wrap { max-width: 100%; }
.steps { margin-top: 26px; display: flex; flex-direction: column; gap: 0; counter-reset: step; }
.step { display: flex; gap: 16px; padding: 16px 0; border-top: 1px solid var(--line); }
.step:first-child { border-top: none; }
.step .n {
  flex: none; width: 30px; height: 30px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent-deep);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.9rem;
}
.step p { color: var(--ink-2); font-size: 0.97rem; }
.step strong { color: var(--ink); }

.formula-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 30px; text-align: center;
}
.formula-line { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; }
.formula-chip {
  background: var(--surface-2); border: 1px solid var(--line);
  border-radius: var(--radius-s); padding: 12px 16px; min-width: 120px;
}
.formula-chip .k { font-size: 0.8rem; color: var(--ink-3); font-weight: 600; }
.formula-chip .v { font-size: 1.05rem; font-weight: 600; margin-top: 2px; }
.formula-op { font-size: 1.4rem; color: var(--ink-3); font-weight: 500; }
.formula-eq { margin-top: 18px; padding-top: 18px; border-top: 1px dashed var(--line-strong); }
.formula-eq .v { font-size: 1.7rem; font-weight: 600; color: var(--accent-deep); }
.formula-eq .k { font-size: 0.82rem; color: var(--ink-3); }

/* Écarts entre communes : liste classée */
.rank-list { margin-top: 34px; display: flex; flex-direction: column; }
.rank-row {
  display: grid; grid-template-columns: 2rem 1fr auto auto; gap: 18px; align-items: baseline;
  padding: 15px 4px; border-top: 1px solid var(--line);
}
.rank-row:first-child { border-top: none; }
.rank-row .pos { color: var(--ink-3); font-size: 0.9rem; }
.rank-row .city { font-weight: 600; }
.rank-row .city small { display: block; font-weight: 400; color: var(--ink-3); font-size: 0.82rem; }
.rank-row .rate { color: var(--ink-2); font-size: 0.95rem; }
.rank-row .euros { font-weight: 600; font-size: 1.02rem; }
.rank-row.is-hl { background: var(--accent-soft); border-radius: var(--radius-s); border-top-color: transparent; padding-left: 12px; padding-right: 12px; }
.rank-row.is-hl + .rank-row { border-top-color: transparent; }
@media (max-width: 620px) {
  .rank-row { grid-template-columns: 1.6rem 1fr auto; }
  .rank-row .rate { display: none; }
}

/* Grille de villes */
.city-grid { margin-top: 34px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.city-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-s);
  padding: 16px 18px; color: var(--ink); display: flex; flex-direction: column; gap: 2px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.city-card:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-2px); }
.city-card .name { font-weight: 600; }
.city-card .meta { font-size: 0.82rem; color: var(--ink-3); }
.city-card .rate { margin-top: 8px; font-size: 0.95rem; color: var(--accent-deep); font-weight: 600; }
@media (max-width: 900px) { .city-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 620px) { .city-grid { grid-template-columns: repeat(2, 1fr); } }

/* Nuage de liens (régions, départements) */
.link-cloud { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 10px; }
.link-cloud a {
  display: inline-block; padding: 8px 14px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--line);
  color: var(--ink-2); font-size: 0.88rem; font-weight: 500;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.link-cloud a:hover { border-color: var(--accent); color: var(--accent-deep); text-decoration: none; }

/* FAQ */
.faq { margin-top: 30px; max-width: 46rem; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer; list-style: none; padding: 18px 30px 18px 2px;
  font-weight: 600; position: relative; font-size: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  color: var(--ink-3); font-size: 1.3rem; font-weight: 400;
}
.faq details[open] summary::after { content: "\2212"; }
.faq .a { padding: 0 2px 20px; color: var(--ink-2); font-size: 0.97rem; max-width: 42rem; }

/* ---------- Fiche ville ---------- */

.crumbs { padding: 22px 0 0; font-size: 0.86rem; color: var(--ink-3); }
.crumbs a { color: var(--ink-3); }
.crumbs a:hover { color: var(--accent); }
.crumbs span[aria-hidden] { margin: 0 6px; }

.city-hero { padding: 26px 0 48px; }
.city-hero h1 { font-size: clamp(1.7rem, 3.6vw, 2.6rem); letter-spacing: -0.025em; line-height: 1.1; max-width: 46rem; }
.city-hero .lead { margin-top: 14px; color: var(--ink-2); max-width: 44rem; font-size: 1.05rem; }
.updated { margin-top: 14px; font-size: 0.84rem; color: var(--ink-3); }

.kpis { margin-top: 34px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.kpi {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-s);
  padding: 18px 20px;
}
.kpi .k { font-size: 0.82rem; color: var(--ink-3); font-weight: 600; }
.kpi .v { margin-top: 6px; font-size: 1.55rem; font-weight: 600; letter-spacing: -0.02em; }
.kpi .s { margin-top: 4px; font-size: 0.8rem; color: var(--ink-3); }
.kpi.kpi-accent { background: var(--accent-soft); border-color: transparent; }
.kpi.kpi-accent .v { color: var(--accent-deep); }
@media (max-width: 900px) { .kpis { grid-template-columns: repeat(2, 1fr); } }
/* Très petits écrans (<= 400px) : à 2 colonnes, une valeur mono comme « 34,63 % »
   (insécable, donc non coupable) dépasse la carte en 1.55rem : on resserre. */
@media (max-width: 400px) {
  .kpi { padding: 16px 14px; }
  .kpi .v { font-size: 1.3rem; }
}

/* Tableau tranches */
.table-wrap { margin-top: 30px; overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table.data { width: 100%; border-collapse: collapse; font-size: 0.95rem; min-width: 560px; }
table.data th, table.data td { text-align: left; padding: 13px 18px; }
table.data thead th {
  font-size: 0.8rem; color: var(--ink-3); font-weight: 600;
  border-bottom: 1px solid var(--line-strong); background: var(--surface-2);
}
table.data tbody tr + tr td { border-top: 1px solid var(--line); }
table.data td.right, table.data th.right { text-align: right; }
table.data tr.is-you td { background: var(--accent-soft); font-weight: 600; }
.table-foot { padding: 12px 18px; font-size: 0.82rem; color: var(--ink-3); border-top: 1px solid var(--line); }

/* Comparaison voisines : delta */
.delta-neg { color: var(--good); font-weight: 600; }
.delta-pos { color: var(--warn); font-weight: 600; }
.pill-best {
  display: inline-block; font-size: 0.78rem; font-weight: 700;
  background: var(--good-soft); color: var(--good);
  border-radius: 999px; padding: 3px 10px; margin-left: 8px; vertical-align: 1px;
}

/* Panneaux meilleure ville */
.best-grid { margin-top: 30px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.best-card {
  border-radius: var(--radius); padding: 26px; border: 1px solid var(--line); background: var(--surface);
  display: flex; flex-direction: column; gap: 6px;
}
.best-card.accent { background: linear-gradient(135deg, var(--accent-soft), var(--surface)); }
.best-card .scope { font-size: 0.86rem; color: var(--ink-3); font-weight: 600; }
.best-card .city { font-size: 1.35rem; font-weight: 700; letter-spacing: -0.02em; }
.best-card .figures { margin-top: 4px; color: var(--ink-2); font-size: 0.95rem; }
.best-card a.more { margin-top: 10px; font-weight: 600; font-size: 0.92rem; }
@media (max-width: 720px) { .best-grid { grid-template-columns: 1fr; } }

/* Encadré info */
.callout {
  margin-top: 30px; border-left: 3px solid var(--accent); background: var(--surface);
  border-radius: 0 var(--radius-s) var(--radius-s) 0; padding: 20px 24px;
  color: var(--ink-2); font-size: 0.97rem; max-width: 46rem;
}
.callout strong { color: var(--ink); }

/* Sources */
.sources { margin-top: 30px; font-size: 0.88rem; color: var(--ink-3); max-width: 46rem; }
.sources li { margin: 6px 0 6px 18px; }

/* ---------- Footer ---------- */

footer.site {
  border-top: 1px solid var(--line); padding: 44px 0 56px; margin-top: 40px;
  color: var(--ink-3); font-size: 0.9rem;
}
footer.site .cols { display: flex; gap: 48px; flex-wrap: wrap; justify-content: space-between; }
footer.site .brand { font-size: 1rem; }
footer.site p.small { margin-top: 12px; max-width: 34rem; font-size: 0.84rem; }
footer.site nav { display: flex; gap: 20px; flex-wrap: wrap; }
footer.site nav a { color: var(--ink-2); }

/* Apparition douce : active uniquement si JS présent (classe js sur <html>),
   et respecte prefers-reduced-motion via le bloc global */
@media (prefers-reduced-motion: no-preference) {
  html.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.5s ease, transform 0.5s ease; }
  html.js .reveal.in { opacity: 1; transform: none; }
}