:root {
  --bg: #0f172a; --card: #1e293b; --card2: #273449; --text: #e2e8f0; --muted: #94a3b8;
  --accent: #38bdf8; --good: #4ade80; --warn: #fbbf24; --bad: #f87171; --surf: #a78bfa;
  --radius: 14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; font-size: 16px; }
body { padding-bottom: calc(70px + env(safe-area-inset-bottom)); }
main { padding: 16px; max-width: 640px; margin: 0 auto; }
h1 { font-size: 1.5rem; margin: 8px 0 12px; }
h2 { font-size: 1.1rem; margin: 20px 0 8px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
h3 { margin: 0 0 4px; font-size: 1.05rem; }
p { margin: 6px 0; line-height: 1.4; }
.muted { color: var(--muted); font-size: .9rem; }
.small { font-size: .85rem; }
.card { background: var(--card); border-radius: var(--radius); padding: 14px; margin-bottom: 12px; }
.card.accent { border: 1px solid var(--accent); }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.grow { flex: 1; }
button { font: inherit; border: 0; border-radius: 10px; padding: 10px 14px; background: var(--card2); color: var(--text); cursor: pointer; }
button.primary { background: var(--accent); color: #0b1220; font-weight: 600; }
button.big { width: 100%; padding: 16px; font-size: 1.1rem; }
button.ghost { background: transparent; color: var(--muted); }
button.danger { background: #7f1d1d; }
button.sm { padding: 6px 10px; font-size: .85rem; }
button.active { outline: 2px solid var(--accent); }
input, select, textarea { font: inherit; background: var(--bg); color: var(--text); border: 1px solid #334155; border-radius: 8px; padding: 8px 10px; width: 100%; }
input[type=number] { width: 72px; text-align: center; padding: 10px 4px; font-size: 1.1rem; }
label { display: block; color: var(--muted); font-size: .85rem; margin: 10px 0 4px; }
.pill { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: .75rem; background: var(--card2); color: var(--muted); }
.pill.like { background: #14532d; color: var(--good); }
.pill.never { background: #7f1d1d; color: var(--bad); }
.pill.unknown { background: #713f12; color: var(--warn); }
.pill.new { background: #0c4a6e; color: var(--accent); }

nav { position: fixed; bottom: 0; left: 0; right: 0; display: flex; background: #0b1220; border-top: 1px solid #1e293b;
  padding-bottom: env(safe-area-inset-bottom); }
nav button { flex: 1; border-radius: 0; background: transparent; color: var(--muted); padding: 14px 4px; font-size: .8rem; }
nav button.active { color: var(--accent); outline: none; }

/* 14-day strip */
.strip { display: flex; gap: 6px; margin: 10px 0; }
.strip .d { flex: 1; aspect-ratio: 1; border-radius: 6px; background: var(--card2); position: relative; }
.strip .d.work { background: var(--good); }
.strip .d.surf { background: var(--surf); }
.strip .d.both { background: linear-gradient(135deg, var(--good) 50%, var(--surf) 50%); }
.strip .d.today { outline: 2px solid var(--text); }
.legend span { margin-right: 12px; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 4px; vertical-align: middle; }

.ring { font-size: 2.2rem; font-weight: 700; }
.ring.good { color: var(--good); } .ring.warn { color: var(--warn); } .ring.bad { color: var(--bad); }

/* Session */
.ex { margin-bottom: 12px; }
.ex.current { border: 1px solid var(--accent); }
.ex.done { opacity: .6; }
.sets { display: grid; grid-template-columns: 36px 1fr 1fr 48px; gap: 6px; align-items: center; margin-top: 8px; }
.sets .hdr { color: var(--muted); font-size: .75rem; text-align: center; }
.sets .n { color: var(--muted); text-align: center; }
.sets input { width: 100%; }
.check { width: 44px; height: 44px; border-radius: 10px; background: var(--card2); font-size: 1.2rem; padding: 0; }
.check.on { background: var(--good); color: #052e16; }
.prev { font-size: .8rem; color: var(--muted); margin-top: 4px; }
.cues { font-size: .85rem; color: var(--muted); margin-top: 6px; display: none; }
.ex.open .cues { display: block; }

/* Rest timer bar */
.timer { position: fixed; left: 0; right: 0; bottom: calc(58px + env(safe-area-inset-bottom)); background: #0c4a6e; color: #fff;
  display: flex; align-items: center; gap: 10px; padding: 10px 16px; z-index: 5; }
.timer.hidden { display: none; }
.timer.over { background: #14532d; }
.timer .t { font-size: 1.8rem; font-weight: 700; font-variant-numeric: tabular-nums; flex: 1; }
.timer button { background: rgba(255,255,255,.15); }

/* history */
.hist details { margin-bottom: 8px; }
.hist summary { cursor: pointer; }
.hist table { width: 100%; font-size: .85rem; border-collapse: collapse; margin-top: 6px; }
.hist td { padding: 2px 4px; border-bottom: 1px solid #334155; }

svg.chart { width: 100%; height: 160px; background: var(--card2); border-radius: 10px; }
.chart text { fill: var(--muted); font-size: 18px; }

.lib .item { display: flex; align-items: center; gap: 8px; padding: 8px 0; border-bottom: 1px solid #334155; }
.lib .item:last-child { border-bottom: 0; }
.lib .name { flex: 1; }
.lib select { width: auto; padding: 4px 6px; font-size: .85rem; }

/* Exercise photos */
.row.nowrap { flex-wrap: nowrap; }
.pics { display: flex; gap: 6px; margin: 6px 0; }
.pics img { width: 50%; border-radius: 8px; aspect-ratio: 3 / 2; object-fit: cover; background: var(--card2); cursor: zoom-in; }
.cues p { margin: 6px 0; }
.lib .thumb { width: 56px; height: 38px; object-fit: cover; border-radius: 6px; background: var(--card2); flex: none; cursor: zoom-in; }
.lightbox { position: fixed; inset: 0; z-index: 20; background: rgba(2, 6, 23, .97); overflow: auto; display: flex; flex-direction: column; gap: 10px;
  padding: calc(16px + env(safe-area-inset-top)) 16px calc(16px + env(safe-area-inset-bottom)); }
.lightbox.hidden { display: none; }
.lightbox img { width: 100%; border-radius: 10px; }
.lightbox h3 { margin: 0; }

/* Toast + timer label */
.toast { position: fixed; left: 16px; right: 16px; bottom: calc(80px + env(safe-area-inset-bottom)); background: #0c4a6e; color: #fff; padding: 12px 14px;
  border-radius: 10px; z-index: 10; opacity: 0; transform: translateY(8px); transition: .2s; pointer-events: none; font-size: .9rem; }
.toast.show { opacity: 1; transform: none; }
.timer .t small { display: block; font-size: .75rem; font-weight: 400; opacity: .85; }