/* =========================================================
   Calculatrice de Durée — feuille de style unique
   Aucune dépendance, aucune police externe : 0 requête réseau.
   ========================================================= */

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,p,ul,figure,table{margin:0}
ul{padding:0;list-style:none}
button,input,select{font:inherit;color:inherit}
img,svg{display:block;max-width:100%}

/* ---------- Jetons de design ---------- */
:root{
  --brand:#2563eb; --brand-dk:#1d4ed8; --brand-soft:#eff6ff;
  --bg:#f1f5f9; --bg-grad:radial-gradient(1200px 600px at 50% -200px,#dbeafe 0%,transparent 70%);
  --card:#ffffff; --card-2:#f8fafc;
  --text:#0f172a; --muted:#64748b; --line:#e2e8f0;
  --ok:#059669; --warn:#b45309; --err:#dc2626;
  --shadow:0 1px 2px rgba(15,23,42,.06),0 8px 24px -12px rgba(15,23,42,.18);
  --shadow-lg:0 2px 4px rgba(15,23,42,.05),0 18px 40px -20px rgba(15,23,42,.28);
  --res-a:#2563eb; --res-b:#4f46e5;
  --r:16px; --r-sm:10px;
  color-scheme:light;
}
[data-theme="dark"]{
  --brand:#60a5fa; --brand-dk:#3b82f6; --brand-soft:#132a4d;
  --bg:#080d18; --bg-grad:radial-gradient(1200px 600px at 50% -220px,#132a4d 0%,transparent 70%);
  --card:#0f172a; --card-2:#131f38;
  --text:#e8eefc; --muted:#93a4c0; --line:#22304d;
  --ok:#34d399; --warn:#fbbf24; --err:#f87171;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 28px -14px rgba(0,0,0,.7);
  --shadow-lg:0 2px 6px rgba(0,0,0,.45),0 22px 48px -22px rgba(0,0,0,.8);
  --res-a:#1e40af; --res-b:#4338ca;
  color-scheme:dark;
}

body{
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg);background-image:var(--bg-grad);background-repeat:no-repeat;
  color:var(--text);line-height:1.65;
  font-size:16px;text-rendering:optimizeLegibility;
  overflow-wrap:break-word;
}
.wrap{width:100%;max-width:1140px;margin-inline:auto;padding-inline:16px}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;border-radius:0 0 10px 0;z-index:99}
.skip-link:focus{left:0}

:where(a,button,input,summary):focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

/* ---------- En-tête ---------- */
.site-header{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:700;letter-spacing:-.02em}
.brand-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:9px;background:linear-gradient(140deg,var(--brand),#7c3aed);color:#fff;box-shadow:var(--shadow)}
.brand-text{font-size:1.02rem}
.theme-toggle{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;border:1px solid var(--line);background:var(--card);cursor:pointer;transition:transform .15s,border-color .15s}
.theme-toggle:hover{transform:translateY(-1px);border-color:var(--brand)}
.ico-moon{display:none}
[data-theme="dark"] .ico-sun{display:none}
[data-theme="dark"] .ico-moon{display:block}

/* ---------- Fil d'Ariane ---------- */
.fil{padding:14px 0 0;font-size:.82rem;color:var(--muted)}
.fil a{color:var(--brand);text-decoration:none}
.fil a:hover{text-decoration:underline}
.fil span[aria-hidden]{margin:0 6px;opacity:.6}

/* ---------- Liens vers les autres pages ---------- */
.liens-connexes{display:grid;grid-template-columns:1fr;gap:8px;margin:14px 0 6px}
@media(min-width:600px){.liens-connexes{grid-template-columns:1fr 1fr}}
.liens-connexes a{display:block;padding:12px 14px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-sm);text-decoration:none;color:var(--text);font-weight:600;font-size:.92rem;
  transition:border-color .15s,transform .15s}
.liens-connexes a:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.liens-connexes a::before{content:"→ ";color:var(--brand)}

/* ---------- Héros ---------- */
.hero{padding:22px 0 12px;max-width:900px}
h1{font-size:clamp(1.5rem,4vw,2.2rem);line-height:1.18;letter-spacing:-.025em;font-weight:800}
.lead{margin-top:10px;max-width:660px;color:var(--muted);font-size:clamp(.94rem,2.2vw,1.04rem)}
.lead strong{color:var(--text);font-weight:600}

/* ---------- Publicité (hauteurs réservées : CLS = 0) ---------- */
.ad{margin:4px 0 16px}
.ad-label{display:block;font-size:.64rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);opacity:.7;margin-bottom:3px}
.ad-slot{display:grid;place-items:center;border:1px dashed var(--line);border-radius:var(--r-sm);background:var(--card-2);color:var(--muted);overflow:hidden}
.ad-leaderboard .ad-slot{min-height:100px}
.ad-slot-rect{width:100%;max-width:300px;min-height:250px;margin-inline:auto}
.ad-ph{font-size:.78rem;text-align:center;opacity:.6}
.ad-slot:has(ins) .ad-ph,.ad-slot:has(iframe) .ad-ph{display:none}
@media(min-width:768px){.ad-leaderboard .ad-slot{min-height:90px}}

/* ---------- Mise en page (mobile d'abord) ---------- */
.layout{display:grid;grid-template-columns:minmax(0,1fr);gap:24px;align-items:start}
.col-main,.col-side{min-width:0}
@media(min-width:1024px){
  .layout{grid-template-columns:minmax(0,1fr) 300px;gap:28px}
  .col-side{position:sticky;top:80px}
}

/* ---------- Carte / calculatrice ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow-lg)}
.calc{padding:14px}
@media(min-width:640px){.calc{padding:22px}}

.tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;padding:5px;background:var(--card-2);border:1px solid var(--line);border-radius:14px;margin-bottom:18px}
.tab{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  padding:9px 4px;border:0;border-radius:10px;background:transparent;color:var(--muted);
  font-size:.76rem;font-weight:600;line-height:1.25;text-align:center;cursor:pointer;transition:background .16s,color .16s}
.tab-ico{flex:0 0 auto}
.tab:hover{color:var(--text)}
.tab.is-active{background:var(--card);color:var(--brand);box-shadow:var(--shadow)}
@media(min-width:640px){.tab{flex-direction:row;gap:8px;font-size:.9rem;padding:11px 8px}}

.panel{display:block}
.panel.is-hidden{display:none}

.field{margin-bottom:12px}
.lbl{display:block;font-size:.8rem;font-weight:600;color:var(--muted);margin-bottom:6px}
.inp{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--card-2);
  font-size:1rem;transition:border-color .15s,box-shadow .15s;min-height:44px}
.inp:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 22%,transparent);background:var(--card)}
.inp-quick{font-size:1.12rem;font-weight:600;letter-spacing:.01em}
.hint{margin-top:6px;font-size:.76rem;line-height:1.5;color:var(--muted)}
.hint code,.content code{background:var(--brand-soft);color:var(--brand-dk);padding:1px 6px;border-radius:6px;font-size:.9em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
[data-theme="dark"] .hint code,[data-theme="dark"] .content code{color:#bfdbfe}

.sep{display:flex;align-items:center;gap:12px;margin:12px 0;color:var(--muted);font-size:.74rem;text-transform:uppercase;letter-spacing:.1em}
.sep::before,.sep::after{content:"";flex:1;height:1px;background:var(--line)}

.grid-2{display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:520px){.grid-2{grid-template-columns:1fr 1fr;gap:14px}}

/* Lignes de saisie détaillée */
.rows{display:flex;flex-direction:column;gap:8px;margin-bottom:10px}
.row,.row-units{display:grid;grid-template-columns:78px 1fr 1fr 1fr 36px;gap:8px;align-items:center}
.sign-group{display:grid;grid-template-columns:1fr 1fr;height:44px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--card-2)}
.sg-btn{border:0;background:transparent;font-weight:800;font-size:1.05rem;line-height:1;color:var(--muted);cursor:pointer;transition:background .15s,color .15s}
.sg-btn:hover{background:color-mix(in srgb,var(--brand) 12%,transparent);color:var(--text)}
.sg-plus.is-on{background:var(--brand);color:#fff}
.sg-minus.is-on{background:var(--err);color:#fff}
.sg-btn:focus-visible{outline:2px solid var(--brand);outline-offset:-2px;border-radius:0}
.row .inp{padding:12px 6px;text-align:center;min-width:0}
.row-del{height:36px;width:36px;border:0;border-radius:9px;background:transparent;color:var(--muted);cursor:pointer;font-size:1.2rem;line-height:1}
.row-del:hover{color:var(--err);background:var(--card-2)}
.row-units{font-size:.68rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
@media(max-width:400px){
  .row,.row-units{grid-template-columns:66px 1fr 1fr 1fr 30px;gap:6px}
  .row-units{font-size:.62rem;letter-spacing:.02em}
  .row .inp{padding:12px 2px}
  .row-del{width:30px}
}
.row-units span{text-align:center;line-height:1.3}
.row-actions{display:flex;flex-wrap:wrap;gap:8px}
.op-plus{color:var(--brand);font-weight:800}
.op-minus{color:var(--err);font-weight:800}

.chips{display:flex;flex-wrap:wrap;gap:7px}
.chip{padding:9px 13px;border:1px solid var(--line);border-radius:999px;background:var(--card-2);font-size:.82rem;font-weight:600;color:var(--muted);cursor:pointer;transition:.15s}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.chip.is-on{background:var(--brand);border-color:var(--brand);color:#fff}

.opts{display:flex;flex-direction:column;gap:10px;margin-top:4px}
.switch{display:flex;align-items:center;gap:10px;font-size:.9rem;cursor:pointer}
.switch input{position:absolute;opacity:0;width:0;height:0}
.switch-ui{flex:0 0 auto;width:42px;height:24px;border-radius:999px;background:var(--line);position:relative;transition:background .18s}
.switch-ui::after{content:"";position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.3);transition:transform .18s}
.switch input:checked + .switch-ui{background:var(--brand)}
.switch input:checked + .switch-ui::after{transform:translateX(18px)}
.switch input:focus-visible + .switch-ui{outline:2px solid var(--brand);outline-offset:2px}

.note{margin-top:10px;padding:9px 12px;border-radius:10px;background:var(--brand-soft);color:var(--brand-dk);font-size:.84rem}
[data-theme="dark"] .note{color:#bfdbfe}
.note.is-hidden{display:none}

/* ---------- Résultat (hauteur réservée) ---------- */
.result{margin-top:14px;padding:16px;border-radius:14px;background:linear-gradient(150deg,var(--res-a) 0%,var(--res-b) 100%);color:#fff;min-height:158px;box-shadow:var(--shadow)}
.result-label{display:block;font-size:.72rem;text-transform:uppercase;letter-spacing:.14em;opacity:.82;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.result-value{display:block;font-size:clamp(1.9rem,7vw,2.7rem);font-weight:800;line-height:1.15;letter-spacing:-.02em;margin-top:2px;font-variant-numeric:tabular-nums}
.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:8px;margin-top:14px}
.res-cell{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.16);border-radius:10px;padding:9px 11px}
.res-cell b{display:block;font-size:1.02rem;font-weight:700;font-variant-numeric:tabular-nums;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.res-cell span{display:block;font-size:.7rem;opacity:.85;text-transform:uppercase;letter-spacing:.07em}
.result-note{margin-top:10px;font-size:.75rem;opacity:.82}
.result-err{margin-top:10px;font-size:.85rem;background:rgba(0,0,0,.22);padding:8px 11px;border-radius:9px}
.result-err.is-hidden,.result-note.is-hidden{display:none}

.actions{display:flex;gap:10px;margin:12px 0 18px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;border-radius:12px;border:1px solid transparent;
  font-size:.92rem;font-weight:600;cursor:pointer;transition:transform .14s,background .14s,border-color .14s;min-height:46px}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--res-a);color:#fff;flex:1 1 auto}
.btn-primary:hover{background:var(--res-b)}
.btn-ghost{background:var(--card-2);border-color:var(--line);color:var(--muted)}
.btn-ghost:hover{color:var(--text);border-color:var(--brand)}
.btn-sm{padding:8px 14px;font-size:.85rem;min-height:38px}

/* ---------- Historique ---------- */
.history{margin-top:18px;border-top:1px solid var(--line);padding-top:14px}
.history-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.history-title{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}
.link-btn{border:0;background:none;color:var(--brand);font-size:.8rem;font-weight:600;cursor:pointer;padding:6px 10px;min-height:32px}
.history-list{display:flex;flex-direction:column;gap:6px}
.history-list li{display:flex;justify-content:space-between;gap:12px;align-items:baseline;
  padding:9px 12px;background:var(--card-2);border:1px solid var(--line);border-radius:10px;font-size:.85rem}
.history-list .h-in{color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.history-list .h-out{font-weight:700;white-space:nowrap;color:var(--brand)}

/* ---------- Contenu éditorial ---------- */
.content{max-width:760px;margin:46px 0 20px}
.content h2{font-size:clamp(1.25rem,3.4vw,1.6rem);line-height:1.3;letter-spacing:-.02em;margin:38px 0 12px;scroll-margin-top:76px}
.content h2:first-child{margin-top:0}
.content h3{font-size:1.06rem;margin:24px 0 8px;color:var(--brand-dk)}
[data-theme="dark"] .content h3{color:var(--brand)}
.content p{margin-bottom:14px;color:color-mix(in srgb,var(--text) 88%,var(--muted))}
.formula{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:0 var(--r-sm) var(--r-sm) 0;padding:12px 16px;font-size:1.02rem}
.micro{font-size:.86rem;color:var(--muted)}
.uses li{position:relative;padding-left:24px;margin-bottom:9px;color:color-mix(in srgb,var(--text) 88%,var(--muted))}
.uses li::before{content:"✓";position:absolute;left:0;top:0;color:var(--ok);font-weight:800}

.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--card);margin:16px 0 18px}
table{border-collapse:collapse;width:100%;font-size:.9rem;min-width:340px}
caption{caption-side:top;text-align:left;padding:11px 14px 6px;font-size:.78rem;color:var(--muted);font-weight:600}
th,td{padding:9px 14px;text-align:left;border-bottom:1px solid var(--line)}
thead th{background:var(--card-2);font-size:.76rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted)}
tbody tr:last-child td{border-bottom:0}
tbody tr:nth-child(2n) td{background:color-mix(in srgb,var(--card-2) 55%,transparent)}
td:first-child{font-weight:600}

.faq{display:flex;flex-direction:column;gap:9px;margin-top:14px}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);overflow:hidden}
.faq summary{padding:14px 16px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:12px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--brand);font-size:1.3rem;font-weight:700;line-height:1;flex:0 0 auto}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:0 16px 15px;margin:0;color:var(--muted);font-size:.93rem}

/* ---------- Pied de page ---------- */
.site-footer{margin-top:44px;padding:26px 0 34px;border-top:1px solid var(--line);color:var(--muted);font-size:.88rem;background:var(--card)}
.site-footer p{margin-bottom:6px}
.site-footer strong{color:var(--text)}
.site-footer a,.content a{color:var(--brand);text-underline-offset:3px}

/* ---------- Toast ---------- */
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,140%);z-index:60;
  background:var(--text);color:var(--bg);padding:11px 20px;border-radius:999px;font-size:.88rem;font-weight:600;
  box-shadow:var(--shadow-lg);opacity:0;transition:transform .28s cubic-bezier(.2,.8,.3,1),opacity .28s;pointer-events:none}
.toast.is-on{transform:translate(-50%,0);opacity:1}

@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
@media print{.ad,.site-header,.actions,.history,.toast{display:none!important}}