:root {
    --bg: #0f1115;
    --card: #181b22;
    --card-2: #20242d;
    --border: #2a2f3a;
    --text: #e8eaef;
    --muted: #8b93a3;
    --accent: #4f8cff;
    --accent-2: #3b74e0;
    --ok: #4ade80;
    --fail: #f87171;
    --radius: 12px;
    color-scheme: dark;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.45;
    -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.5rem; margin: .5rem 0 1rem; }
h2 { font-size: 1.15rem; margin: 0 0 .75rem; }
h3 { font-size: 1.05rem; margin: 0 0 .5rem; }
h3 a { color: var(--text); }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.center { text-align: center; }
.error { color: var(--fail); }

.topbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: .75rem 1rem; border-bottom: 1px solid var(--border);
    position: sticky; top: 0; background: var(--bg); z-index: 10;
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.logout { color: var(--muted); font-size: .9rem; }

.container { max-width: 44rem; margin: 0 auto; padding: 1rem 1rem 5rem; }

.tabs {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px;
    background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 4px; margin-bottom: 1rem;
}
.tabs a {
    text-align: center; padding: .55rem .25rem; border-radius: 8px;
    color: var(--muted); font-size: .9rem;
}
.tabs a.active { background: var(--card-2); color: var(--text); font-weight: 600; }
.tabs a:hover { text-decoration: none; color: var(--text); }

.card {
    background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 1rem; margin-bottom: 1rem;
}
details.card > summary { cursor: pointer; color: var(--muted); }
details.card[open] > summary { margin-bottom: .75rem; }

/* Formulaires */
input, select, textarea, button { font: inherit; color: inherit; }
input[type=text], input[type=password], input[type=date], input[type=number], select, textarea {
    background: var(--card-2); border: 1px solid var(--border); border-radius: 8px;
    padding: .6rem .7rem; min-height: 44px; width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
textarea { resize: vertical; }
label { display: block; color: var(--muted); font-size: .9rem; }
label > input, label > select { margin-top: .25rem; color: var(--text); }
label.inline { display: inline-flex; align-items: center; gap: .5rem; }
label.inline input { width: auto; margin: 0; }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    min-height: 44px; padding: .5rem 1rem; border-radius: 8px;
    background: var(--card-2); border: 1px solid var(--border); color: var(--text);
    cursor: pointer; white-space: nowrap;
}
.btn:hover { border-color: var(--muted); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn.primary:hover { background: var(--accent-2); }
.btn.danger { color: var(--fail); border-color: #5a2a2a; background: transparent; }
.icon {
    min-width: 40px; min-height: 40px; border-radius: 8px; cursor: pointer;
    background: transparent; border: 1px solid var(--border); color: var(--muted);
}
.icon:disabled { opacity: .3; cursor: default; }
.link { background: none; border: 0; color: var(--accent); cursor: pointer; padding: .35rem 0; }

.row { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; margin: .5rem 0; }
.row > input, .row > select { flex: 1 1 10rem; width: auto; }
.row.compact { margin: 0; }

.login { max-width: 22rem; margin: 3rem auto; }
.login form { display: grid; gap: 1rem; }

/* Semaine */
.new-session { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; align-items: end; }
.new-session .btn { grid-column: 1 / -1; }
.week-nav { display: flex; align-items: center; justify-content: space-between; gap: .5rem; margin: 1.25rem 0 .5rem; text-align: center; }
.week { list-style: none; padding: 0; margin: 0; display: grid; gap: .5rem; }
.day {
    display: grid; grid-template-columns: 6.5rem 1fr; gap: .75rem; align-items: center;
    background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: .75rem 1rem;
}
.day.weekend { background: transparent; border-style: dashed; }
.day.today { border-color: var(--accent); }
.day.done .day-label { color: var(--ok); }
.day-label { font-weight: 600; }
.day-body { display: grid; gap: .4rem; }
.session-chip { display: flex; flex-direction: column; color: var(--text); }
.session-chip .muted { font-size: .85rem; }

/* Listes */
.month { margin-top: 1.5rem; }
.list { list-style: none; padding: 0; margin: 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.list li + li { border-top: 1px solid var(--border); }
.list a {
    display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
    padding: .8rem 1rem; color: var(--text); background: var(--card);
}
.list a:hover { background: var(--card-2); text-decoration: none; }

/* Seance */
.session-head { margin-bottom: 1rem; }
.session-head h1 { margin: .25rem 0 .5rem; }
.ex-head { display: flex; justify-content: space-between; align-items: flex-start; gap: .5rem; }
.ex-head h3 { margin: 0; }
.ex-actions { display: flex; gap: 4px; align-items: center; flex-shrink: 0; }
.ex-actions form { margin: 0; }
.last { margin: .5rem 0 .75rem; font-size: .9rem; }

.sets { display: grid; gap: .5rem; margin-bottom: .75rem; }
.set { background: var(--card-2); border-radius: 10px; padding: .5rem; }
.seg { display: grid; grid-template-columns: 2.2rem 1fr auto 1fr auto auto; gap: .4rem; align-items: center; }
.seg + .seg { margin-top: .4rem; }
.seg.drop .seg-label { color: var(--accent); text-align: center; }
.seg-label { font-weight: 600; color: var(--muted); font-size: .9rem; }
.times { color: var(--muted); }
.num { position: relative; margin: 0; }
.num input { margin: 0; padding-right: 2.6rem; text-align: right; font-size: 1.05rem; font-variant-numeric: tabular-nums; }
.num span { position: absolute; right: .55rem; top: 50%; transform: translateY(-50%); font-size: .75rem; color: var(--muted); pointer-events: none; }
.toggle-fail {
    min-height: 40px; padding: 0 .6rem; border-radius: 8px; cursor: pointer; font-size: .85rem;
    background: transparent; border: 1px solid var(--border); color: var(--muted);
}
.toggle-fail.on { background: rgba(248, 113, 113, .15); border-color: var(--fail); color: var(--fail); font-weight: 600; }
.add-drop { font-size: .85rem; margin-left: 2.6rem; }
.add-set { width: 100%; }

.save-status {
    position: fixed; bottom: 1rem; left: 50%; transform: translateX(-50%);
    background: var(--card-2); border: 1px solid var(--border); border-radius: 999px;
    padding: .35rem .9rem; font-size: .85rem; color: var(--muted);
    opacity: 0; transition: opacity .2s; pointer-events: none;
}
.save-status:not(:empty) { opacity: 1; }
.save-status.ok { color: var(--ok); }
.save-status.ko { color: var(--fail); border-color: var(--fail); }

/* Exercice */
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin-bottom: 1rem; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: .75rem 1rem; display: flex; flex-direction: column; }
.stat strong { font-size: 1.25rem; }
.stat .muted { font-size: .8rem; }
.chart { width: 100%; height: auto; }
.chart polyline { fill: none; stroke: var(--accent); stroke-width: 2.5; stroke-linejoin: round; }
.chart circle { fill: var(--accent); }
.chart .axis { fill: var(--muted); font-size: 12px; }
.history { list-style: none; padding: 0; margin: 0; }
.history li { padding: .6rem 0; }
.history li + li { border-top: 1px solid var(--border); }

/* Programmes */
.title-form .title-input { font-size: 1.3rem; font-weight: 600; }
.tpl-ex { list-style: none; padding: 0; margin: 0 0 1rem; }
.tpl-ex li { display: grid; grid-template-columns: 1fr auto; gap: .5rem; padding: .6rem 0; align-items: center; }
.tpl-ex li + li { border-top: 1px solid var(--border); }
.tpl-ex .tpl-ex-name { grid-column: 1 / -1; }
.tpl-ex .row.compact input { max-width: 12rem; }

@media (max-width: 420px) {
    .seg { grid-template-columns: 1.8rem 1fr auto 1fr auto; }
    .seg [data-act="del-seg"] { grid-column: 5; grid-row: 2; }
    .seg .toggle-fail { grid-column: 2 / 5; grid-row: 2; }
    .day { grid-template-columns: 5.5rem 1fr; }
}