/* ---------- Couleurs et bases ---------- */
:root {
  --bg: #f5f3ff;
  --card: #ffffff;
  --text: #1f1b2e;
  --muted: #6b6880;
  --border: #e4e0f0;
  --accent: #7c3aed;
  --accent-soft: #ede9fe;
  --danger: #dc2626;
  --success: #16a34a;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14121c;
    --card: #1f1c2b;
    --text: #f1eff8;
    --muted: #a29fb5;
    --border: #322e44;
    --accent: #a78bfa;
    --accent-soft: #2e2546;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.4;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px 16px calc(96px + env(safe-area-inset-bottom));
}

h1 { font-size: 1.5rem; margin: 8px 0 16px; }
h2 { font-size: 1.15rem; margin: 24px 0 8px; }
h3 { font-size: 1.05rem; margin: 0; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }

/* ---------- Barre du haut / navigation du bas ---------- */
.topbar {
  position: sticky; top: 0; z-index: 5;
  background: var(--accent); color: #fff;
  padding: 12px 16px; padding-top: calc(12px + env(safe-area-inset-top)); font-weight: 700;
  display: flex; align-items: center; justify-content: space-between;
}
.install-btn {
  font: inherit; font-size: .9rem; font-weight: 600;
  background: #fff; color: #7c3aed; border: none;
  border-radius: 999px; padding: 6px 12px; cursor: pointer;
}
.install-btn[hidden] { display: none; }

dialog {
  border: none; border-radius: var(--radius); padding: 20px;
  background: var(--card); color: var(--text); max-width: 360px; width: calc(100% - 32px);
}
dialog::backdrop { background: rgba(0, 0, 0, .5); }
dialog ol { padding-left: 20px; line-height: 1.6; }

#nav {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 5;
  display: flex; background: var(--card);
  border-top: 1px solid var(--border);
  padding-bottom: env(safe-area-inset-bottom);
}
#nav[hidden] { display: none; }
#nav a {
  flex: 1; text-align: center; padding: 8px 0 10px;
  color: var(--muted); text-decoration: none; font-size: .8rem;
}
#nav a .ico { display: block; font-size: 1.4rem; }
#nav a.active { color: var(--accent); font-weight: 600; }

/* ---------- Cartes ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 12px;
}
a.card { display: block; color: inherit; text-decoration: none; }

.row { display: flex; align-items: center; gap: 8px; }
.row.between { justify-content: space-between; }
.grow { flex: 1; min-width: 0; }

/* ---------- Formulaires ---------- */
label { display: block; font-size: .9rem; color: var(--muted); margin: 10px 0 4px; }

input, select, textarea {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  min-height: 44px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); border-color: transparent; }
textarea { min-height: 70px; resize: vertical; }
input[type="checkbox"] { width: 24px; height: 24px; min-height: 0; accent-color: var(--danger); }

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font: inherit; font-weight: 600;
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  border-radius: 10px; padding: 10px 14px; min-height: 44px; cursor: pointer;
}
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.soft { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.btn.big { width: 100%; font-size: 1.1rem; padding: 14px; }
.btn.full { width: 100%; }
.btn.danger { color: var(--danger); background: transparent; border-color: transparent; }
.btn:disabled { opacity: .5; }

.icon {
  border: none; background: transparent; color: var(--muted);
  font-size: 1.1rem; min-width: 40px; min-height: 40px; cursor: pointer; border-radius: 8px;
}
.icon:active { background: var(--accent-soft); }

/* ---------- Liste des séances ---------- */
.session-item .date { color: var(--muted); font-size: .9rem; }
.cap::first-letter, .session-item .date::first-letter { text-transform: uppercase; }
.session-item .stats { color: var(--muted); font-size: .85rem; margin-top: 4px; }

/* ---------- Écran d'une séance ---------- */
.back { color: var(--accent); text-decoration: none; font-weight: 600; display: inline-block; margin-bottom: 8px; }
.title-input { font-size: 1.3rem; font-weight: 700; }
.volume { margin-top: 10px; color: var(--muted); }
.volume strong { color: var(--accent); font-size: 1.1rem; }

.last {
  background: var(--accent-soft); color: var(--text);
  border-radius: 10px; padding: 8px 10px; margin: 10px 0; font-size: .9rem;
}

.set-row {
  display: grid;
  grid-template-columns: 28px 1fr 1fr 48px 40px;
  gap: 8px; align-items: center; margin-bottom: 6px;
}
.set-row.head { font-size: .8rem; color: var(--muted); margin-bottom: 2px; }
.set-row .n { text-align: center; font-weight: 700; color: var(--muted); }
.set-row .fail { margin: 0; display: flex; justify-content: center; }
.set-row input[type="number"], .set-row input[type="text"] { text-align: center; padding: 8px 4px; }

details { margin-top: 10px; }
summary { color: var(--muted); cursor: pointer; padding: 6px 0; }

.add-ex .or { text-align: center; color: var(--muted); font-size: .85rem; margin: 8px 0; }

/* ---------- Mesures ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
.measure-values { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-top: 6px; font-size: .9rem; }
.measure-values b { color: var(--accent); }

/* ---------- Exercices ---------- */
.ex-line { display: flex; align-items: center; gap: 4px; padding: 6px 0; border-bottom: 1px solid var(--border); }
.ex-line:last-child { border-bottom: none; }

/* ---------- Message temporaire ---------- */
#toast {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: calc(80px + env(safe-area-inset-bottom));
  background: var(--text); color: var(--bg);
  padding: 10px 16px; border-radius: 10px; z-index: 10;
  max-width: calc(100% - 32px); font-size: .95rem;
}
#toast.error { background: var(--danger); color: #fff; }