/* =========================================================
   Calculateur de RTT — styles.css
   Mobile-first, responsive, sombre/clair automatique.
   Aucune dépendance externe (pas de framework CSS).
   ========================================================= */

/* --- Tokens de design (variables CSS) --- */
:root {
  --c-bg: #f4f6fa;
  --c-surface: #ffffff;
  --c-surface-2: #eef2f7;
  --c-text: #14202e;
  --c-text-muted: #5b6b7d;
  --c-border: #d8e0ea;
  --c-primary: #1e3a5f;
  --c-primary-press: #16304d;
  --c-accent: #0a8d6c;
  --c-accent-soft: #e6f4ef;
  --c-danger: #b3261e;
  --c-danger-soft: #fdecea;
  --c-focus: #1e3a5f;

  --radius: 14px;
  --radius-sm: 8px;
  --space: 16px;
  --shadow: 0 1px 2px rgba(20, 32, 46, .08), 0 6px 18px rgba(20, 32, 46, .06);
  --maxw: 640px;

  --online: #0a8d6c;
  --offline: #b3261e;
}

/* Thème sombre automatique selon la préférence système */
@media (prefers-color-scheme: dark) {
  :root {
    --c-bg: #0f1620;
    --c-surface: #18222f;
    --c-surface-2: #1f2b3a;
    --c-text: #e9eef4;
    --c-text-muted: #9aa8ba;
    --c-border: #2c3a4c;
    --c-primary: #4a78b0;
    --c-primary-press: #3a6396;
    --c-accent: #2bbd93;
    --c-accent-soft: #13352c;
    --c-danger: #ef5350;
    --c-danger-soft: #3a1d1c;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 6px 18px rgba(0, 0, 0, .35);
  }
}

/* --- Reset minimal --- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.5;
  /* padding-top gère l'encoche (viewport-fit=cover) sur mobile */
  padding: calc(env(safe-area-inset-top) + var(--space)) var(--space) var(--space);
  min-height: 100vh;
}

h1, h2 { margin: 0; line-height: 1.25; }
p { margin: 0 0 var(--space); }

.muted { color: var(--c-text-muted); font-size: .9rem; }
.separator { color: var(--c-border); margin: 0 .4em; }

/* --- En-tête --- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space);
  max-width: var(--maxw);
  margin: 0 auto var(--space);
  padding: var(--space);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.app-header__brand { display: flex; align-items: center; gap: 12px; }
.app-header__logo { width: 40px; height: 40px; border-radius: var(--radius-sm); }
.app-header__title { font-size: 1.15rem; }
.app-header__subtitle { font-size: .8rem; color: var(--c-text-muted); margin: 0; }

/* --- Contenu principal --- */
.app-main {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space);
}

/* --- Cartes génériques --- */
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: var(--space);
  box-shadow: var(--shadow);
}
.card__title { font-size: 1.05rem; margin-bottom: 14px; }

/* --- Indicateur réseau --- */
.network-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .9rem;
  color: var(--c-text-muted);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  padding: 8px 14px;
}
.network-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--c-text-muted);
  box-shadow: 0 0 0 3px color-mix(in srgb, currentColor 15%, transparent);
}
.network-status.is-online { color: var(--online); }
.network-status.is-online .network-dot { background: var(--online); }
.network-status.is-offline { color: var(--offline); }
.network-status.is-offline .network-dot { background: var(--offline); }

/* --- Champs de formulaire --- */
.field { margin-bottom: 14px; }
.field label {
  display: block;
  font-weight: 600;
  font-size: .95rem;
  margin-bottom: 6px;
}
.field input {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  color: var(--c-text);
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus {
  outline: none;
  border-color: var(--c-focus);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-focus) 25%, transparent);
}
.field input:invalid:not(:placeholder-shown) {
  border-color: var(--c-danger);
  background: var(--c-danger-soft);
}

.field select {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  color: var(--c-text);
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  transition: border-color .15s, box-shadow .15s;
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none' stroke='%235b6b7d' stroke-width='2'%3e%3cpath d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 18px 18px;
  padding-right: 40px;
}
.field select:focus {
  outline: none;
  border-color: var(--c-focus);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-focus) 25%, transparent);
}

.field__hint { display: block; margin-top: 6px; color: var(--c-text-muted); font-size: .82rem; }

/* --- Résumé automatique (valeurs déduites de l'année) --- */
.auto-summary {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--c-border);
}
.auto-summary__title {
  font-size: .95rem;
  color: var(--c-text-muted);
  margin-bottom: 10px;
}
.auto-summary__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.auto-summary__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  text-align: center;
}
.auto-summary__value {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--c-primary);
  font-variant-numeric: tabular-nums;
}
.auto-summary__leap {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--c-accent);
}
.auto-summary__leap strong {
  font-weight: 700;
}
.auto-summary__label {
  font-size: .75rem;
  color: var(--c-text-muted);
  line-height: 1.2;
}

@media (max-width: 420px) {
  .auto-summary__grid { grid-template-columns: 1fr; }
  .auto-summary__item {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* --- Boutons --- */
.btn {
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  transition: background .15s, transform .05s, border-color .15s;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-focus) 30%, transparent);
}

.btn--primary { background: var(--c-primary); color: #fff; }
.btn--primary:hover { background: var(--c-primary-press); }

.btn--secondary { background: var(--c-accent); color: #fff; }
.btn--secondary:hover { filter: brightness(1.05); }

.btn--ghost { background: transparent; color: var(--c-text); border-color: var(--c-border); }
.btn--ghost:hover { background: var(--c-surface-2); }

.btn--install {
  background: var(--c-accent);
  color: #fff;
  padding: 10px 14px;
  font-size: .9rem;
  white-space: nowrap;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

/* --- Résultat --- */
.card--result { background: linear-gradient(160deg, var(--c-accent-soft), var(--c-surface)); }
.result__big {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}
.result__value {
  font-size: 3rem;
  font-weight: 800;
  color: var(--c-accent);
  font-variant-numeric: tabular-nums;
}
.result__label { color: var(--c-text-muted); font-weight: 600; }

.result__details { margin-top: 10px; }
.result__formula {
  margin: 0 0 12px;
  padding: 10px 12px;
  font-size: .95rem;
  font-weight: 500;
  color: var(--c-text-muted);
  background: var(--c-surface-2);
  border-left: 4px solid var(--c-primary);
  border-radius: var(--radius-sm);
}
.result__details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--c-text-muted);
  padding: 6px 0;
}
.result__detail-list { margin: 8px 0 0; padding-left: 18px; }
.result__detail-list li { margin-bottom: 4px; font-variant-numeric: tabular-nums; }
.result__detail-list .op { color: var(--c-text-muted); margin: 0 .25em; }

/* Bouton inline dans le détail du calcul (jours fériés ouvrés) */
.btn--inline {
  font: inherit;
  font-weight: 600;
  color: var(--c-primary);
  background: transparent;
  border: none;
  border-bottom: 2px dotted var(--c-primary);
  padding: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.btn--inline:hover { color: var(--c-primary-press); }
.btn--inline:focus-visible {
  outline: none;
  border-radius: 2px;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-focus) 25%, transparent);
}

/* --- Panneau des jours fériés --- */
.feries-panel {
  margin-top: 14px;
  padding: 14px;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
}
.feries-panel__title {
  font-size: 1rem;
  margin-bottom: 10px;
}
.feries-panel__legend {
  font-size: .85rem;
  color: var(--c-text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.feries-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.feries-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 10px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
}
.feries-item--working {
  border-left: 4px solid var(--c-accent);
}
.feries-item--off {
  border-left: 4px solid var(--c-danger);
}
.feries-item__meta { display: flex; flex-direction: column; gap: 2px; }
.feries-item__meta strong { font-size: .95rem; }
.feries-item__date { font-size: .8rem; color: var(--c-text-muted); }
.feries-badge {
  font-size: .75rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--c-surface-2);
  color: var(--c-text-muted);
  border: 1px solid var(--c-border);
  white-space: nowrap;
}
.feries-badge--working {
  background: var(--c-accent-soft);
  color: var(--c-accent);
  border-color: var(--c-accent);
}
.feries-badge--off {
  background: var(--c-danger-soft);
  color: var(--c-danger);
  border-color: var(--c-danger);
}

/* --- Liste des sauvegardes --- */
.saved-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.saved-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
}
.saved-item__meta { font-size: .9rem; }
.saved-item__meta strong { font-size: 1.1rem; color: var(--c-accent); }
.saved-item__date { color: var(--c-text-muted); font-size: .8rem; }
.saved-item__actions { display: flex; gap: 6px; }
.saved-item .btn { padding: 8px 12px; font-size: .85rem; }

/* --- Notices --- */
.notice { padding: 12px 14px; border-radius: var(--radius-sm); font-size: .9rem; }
.notice--error { background: var(--c-danger-soft); color: var(--c-danger); border: 1px solid var(--c-danger); }
.notice--info { background: var(--c-accent-soft); color: var(--c-accent); border: 1px solid var(--c-accent); }

/* --- Pied de page --- */
.app-footer {
  max-width: var(--maxw);
  margin: var(--space) auto 0;
  padding: var(--space);
  text-align: center;
  font-size: .85rem;
  color: var(--c-text-muted);
}
.app-footer a { color: var(--c-primary); }

/* --- Responsive : on agrandit le titre et le résultat sur grand écran --- */
@media (min-width: 640px) {
  .app-header__title { font-size: 1.4rem; }
  .result__value { font-size: 3.6rem; }
}

/* --- Réduction des animations pour le respect des préférences --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
  .btn:active { transform: none; }
}

/* --- État masqué --- */
[hidden] { display: none !important; }