/* =====================================================================
   NETWORK CG · Outils réseau (calculatrices)
   Mise en page volontairement simple : un titre, des onglets, un formulaire,
   un tableau de résultats. Couleurs reprises de l'Espace Formations.
   ===================================================================== */
.ot { --navy: #0b1e3f; --blue: #0066cc; --text: #333a45; --muted: #6b7487; --line: #e5e8ee; --soft: #f6f8fb; --white: #fff;
    background: var(--soft); color: var(--text); font-family: 'Inter', system-ui, -apple-system, sans-serif; line-height: 1.6; }
.ot main { padding-bottom: 4rem; }
.ot-wrap { max-width: 880px; margin: 0 auto; padding: 0 1.25rem; }
.ot a { color: var(--blue); text-decoration: none; }
.ot a:hover { text-decoration: underline; }

/* En-tête de page */
.ot-head { padding: 3rem 0 2rem; }
.ot-kicker { margin: 0 0 .4rem; font-size: .74rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--blue); }
.ot-head h1 { margin: 0; font-size: clamp(1.6rem, 3vw, 2.1rem); font-weight: 700; line-height: 1.2; color: var(--navy); }
.ot-head p { margin: .6rem 0 0; max-width: 62ch; color: var(--muted); }

/* Carte principale */
.ot-card { background: var(--white); border: 1px solid var(--line); border-radius: 10px; }
.ot-tabs { display: flex; gap: 0; border-bottom: 1px solid var(--line); overflow-x: auto; scrollbar-width: none; }
.ot-tabs::-webkit-scrollbar { display: none; }
.ot-tab { flex: none; padding: 1rem 1.25rem; border: 0; border-bottom: 2px solid transparent; margin-bottom: -1px; background: none; font: 600 .92rem 'Inter', sans-serif; color: var(--muted); cursor: pointer; }
.ot-tab:hover { color: var(--navy); }
.ot-tab[aria-selected="true"] { color: var(--navy); border-bottom-color: var(--navy); }
.ot-panel { padding: 1.5rem; }
.ot-panel[hidden] { display: none; }
.ot-intro { margin: 0 0 1.25rem; font-size: .93rem; color: var(--muted); }

/* Formulaire */
.ot-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; align-items: start; }
.ot-actions { padding-top: 1.6rem; }
.ot-field label { display: block; margin-bottom: .35rem; font-size: .82rem; font-weight: 600; color: var(--navy); }
.ot-field input, .ot-field select, .ot-field textarea { width: 100%; padding: .65rem .75rem; border: 1px solid #d6dde6; border-radius: 6px; background: #fff; font: 400 16px/1.4 'JetBrains Mono', ui-monospace, SFMono-Regular, Consolas, monospace; color: var(--navy); }
.ot-field select { font-family: 'Inter', sans-serif; font-size: .95rem; }
.ot-field textarea { min-height: 140px; resize: vertical; }
.ot-field input:focus, .ot-field select:focus, .ot-field textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(0, 102, 204, .1); }
.ot-field small { display: block; margin-top: .3rem; font-size: .8rem; color: var(--muted); }
.ot-field.wide { grid-column: 1 / -1; }
.ot-btn { padding: .7rem 1.25rem; border: 0; border-radius: 6px; background: var(--navy); color: #fff; font: 600 .82rem 'Inter', sans-serif; letter-spacing: .05em; text-transform: uppercase; cursor: pointer; }
.ot-btn:hover { background: #16305c; }
.ot-ex { margin: .9rem 0 0; font-size: .85rem; color: var(--muted); }
.ot-ex button { border: 0; background: none; padding: 0; margin: 0 .35rem; font: inherit; color: var(--blue); cursor: pointer; }
.ot-ex button:hover { text-decoration: underline; }

/* Résultats */
.ot-error { margin: 1.25rem 0 0; padding: .75rem 1rem; border: 1px solid #f1c4c4; background: #fdf4f4; border-radius: 6px; font-size: .9rem; color: #8a1f1f; }
.ot-out { margin-top: 1.5rem; }
.ot-out:empty { display: none; }
.ot-out h3 { margin: 1.75rem 0 .6rem; font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.ot-out h3:first-child { margin-top: 0; }
.ot-dl { margin: 0; border-top: 1px solid var(--line); }
.ot-dl div { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 1rem; padding: .6rem 0; border-bottom: 1px solid var(--line); }
.ot-dl dt { font-size: .9rem; color: var(--muted); }
.ot-dl dd { margin: 0; color: var(--navy); font-weight: 500; overflow-wrap: anywhere; }
.mono { font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .92rem; }
.ot-muted { color: var(--muted); font-weight: 400; }
.ot-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; }
.ot-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.ot-table th { padding: .6rem .8rem; background: var(--soft); border-bottom: 1px solid var(--line); text-align: left; font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); white-space: nowrap; }
.ot-table td { padding: .6rem .8rem; border-bottom: 1px solid var(--line); white-space: nowrap; color: var(--navy); }
.ot-table tr:last-child td { border-bottom: 0; }
.ot-calc { margin: 0; padding: 1rem 1.15rem; background: var(--soft); border: 1px solid var(--line); border-radius: 8px; overflow-x: auto; font-family: 'JetBrains Mono', ui-monospace, Consolas, monospace; font-size: .95rem; line-height: 1.8; color: var(--navy); white-space: pre; }
.ot-note { margin: .75rem 0 0; font-size: .85rem; color: var(--muted); }
.ot-foot { margin: 1.25rem 0 0; font-size: .88rem; color: var(--muted); }

@media (max-width: 600px) {
    .ot-head { padding: 2rem 0 1.25rem; }
    .ot-panel { padding: 1.15rem; }
    .ot-tab { padding: .9rem 1rem; }
    .ot-dl div { grid-template-columns: minmax(0, 1fr); gap: .1rem; }
    .ot-form { grid-template-columns: minmax(0, 1fr); }
    .ot-actions { padding-top: 0; }
    .ot-actions .ot-btn { width: 100%; }
}