:root {
  --bg: #fbf8fd; --surface: #ffffff; --surface-2: #f4eefa; --border: #e6dcf1;
  --text: #2a2133; --muted: #6f6480; --accent: #8e4fd0; --accent-ink: #ffffff; --accent-soft: #eadcf9;
  --pink: #e0589a; --good: #2f9a6a; --warn: #c2760e; --bad: #c2384a;
  --shadow: 0 1px 2px rgba(60, 30, 90, .06), 0 6px 24px rgba(60, 30, 90, .06);
  --radius: 16px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15111b; --surface: #1e1827; --surface-2: #272033; --border: #382e48;
    --text: #f0eaf7; --muted: #a99cbd; --accent: #b784f0; --accent-ink: #1a1224; --accent-soft: #3a2a52;
    --pink: #f080b5; --good: #54c795; --warn: #e6a03f; --bad: #ef7184;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 6px 24px rgba(0, 0, 0, .3);
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 .4em; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
a { color: var(--accent); }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 6px; }

.wrap { max-width: 920px; margin: 0 auto; padding: 0 16px; }

/* buttons & fields */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .45em;
  border: 1px solid var(--border); background: var(--surface); border-radius: 12px;
  padding: .6em 1.1em; cursor: pointer; text-decoration: none; color: var(--text); font-weight: 600;
  min-height: 44px;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--bad); }
.btn.small { padding: .3em .7em; min-height: 34px; font-size: .9rem; }
.btn:disabled { opacity: .55; cursor: default; }

label.field { display: block; margin-bottom: 14px; font-weight: 600; font-size: .92rem; }
label.field > span.hint { font-weight: 400; color: var(--muted); }
input[type=text], input[type=password], input[type=number], input[type=date], select, textarea {
  display: block; width: 100%; margin-top: 4px; padding: .6em .8em; min-height: 44px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
}
.err { color: var(--bad); min-height: 1.4em; font-size: .92rem; margin: 6px 0 0; }

/* ---------- landing ---------- */
.hero { padding: 56px 0 24px; text-align: center; }
.hero .badge { display: inline-block; background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: .8rem; padding: .3em .9em; border-radius: 99px; letter-spacing: .04em; text-transform: uppercase; }
.hero h1 { font-size: clamp(2rem, 6vw, 3.2rem); margin: .5em 0 .3em; }
.hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--accent), var(--pink)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { color: var(--muted); max-width: 36em; margin: 0 auto 1.4em; font-size: 1.1rem; }
.auth-card {
  max-width: 380px; margin: 0 auto; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; text-align: left;
}
.auth-card h2 { font-size: 1.15rem; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; margin: 36px 0; }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.feature .ico { font-size: 1.6rem; }
.feature h3 { font-size: 1.05rem; margin-top: .3em; }
.feature p { color: var(--muted); margin: 0; font-size: .95rem; }
.week-preview { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; margin: 0 0 40px; }
.week-preview div { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 10px 4px; text-align: center; font-size: .78rem; color: var(--muted); }
.week-preview b { display: block; color: var(--text); font-size: .9rem; }
.week-preview .s { border-color: var(--accent); background: var(--accent-soft); }
footer.site { text-align: center; color: var(--muted); font-size: .85rem; padding: 24px 16px 40px; }

/* ---------- app shell ---------- */
.topbar { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.topbar .wrap { display: flex; align-items: center; gap: 10px; min-height: 60px; }
.brand { font-weight: 800; font-size: 1.15rem; letter-spacing: -.02em; margin-right: auto; text-decoration: none; color: var(--text); }
.brand span { color: var(--accent); }
.tabs { display: flex; gap: 4px; }
.tab { border: 0; background: transparent; padding: .5em .9em; border-radius: 10px; cursor: pointer; font-weight: 600; color: var(--muted); min-height: 40px; }
.tab[aria-selected=true] { background: var(--accent-soft); color: var(--accent); }

/* Gym / Home toggle (top right) */
.mode-toggle { display: inline-flex; background: var(--surface-2); border: 1px solid var(--border); border-radius: 99px; padding: 3px; }
.mode-toggle button { border: 0; background: transparent; cursor: pointer; border-radius: 99px; padding: .4em .95em; font-weight: 700; font-size: .9rem; color: var(--muted); min-height: 36px; }
.mode-toggle button[aria-pressed=true] { background: var(--accent); color: var(--accent-ink); box-shadow: 0 1px 4px rgba(0,0,0,.2); }
.icon-btn { border: 1px solid var(--border); background: var(--surface); border-radius: 50%; width: 40px; height: 40px; cursor: pointer; font-size: 1.1rem; }
@media (max-width: 600px) {
  .topbar .wrap { flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; row-gap: 6px; }
  .tabs { order: 5; width: 100%; }
  .tab { flex: 1; text-align: center; }
}

main { padding: 18px 0 80px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; margin-bottom: 16px; }
.muted { color: var(--muted); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.grow { flex: 1; }

/* week strip */
.week { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; margin-bottom: 16px; }
.day-chip {
  position: relative; border: 1px solid var(--border); background: var(--surface); border-radius: 14px;
  padding: 8px 2px 9px; cursor: pointer; text-align: center; min-height: 64px;
}
.day-chip b { display: block; font-size: .82rem; }
.day-chip small { display: block; color: var(--muted); font-size: .68rem; line-height: 1.2; margin-top: 2px; }
.day-chip[aria-pressed=true] { border-color: var(--accent); background: var(--accent-soft); }
.day-chip.today::after { content: ''; position: absolute; top: 5px; right: 6px; width: 7px; height: 7px; border-radius: 50%; background: var(--pink); }
.day-chip .tick { color: var(--good); font-weight: 800; font-size: .8rem; }
.day-chip.kind-strength b::after { content: ' ●'; color: var(--accent); font-size: .6rem; }

.day-head h2 { font-size: 1.5rem; }
.pill { display: inline-block; background: var(--surface-2); border: 1px solid var(--border); border-radius: 99px; padding: .15em .75em; font-size: .82rem; font-weight: 600; color: var(--muted); }
.pill.accent { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.progress { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; margin: 12px 0 0; }
.progress > i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--pink)); width: 0; transition: width .3s; }

/* exercise cards */
.ex { display: grid; grid-template-columns: 150px 1fr; gap: 16px; }
.ex.done { opacity: .72; }
.demo { position: relative; width: 150px; height: 150px; border-radius: 12px; overflow: hidden; background: #fff; border: 1px solid var(--border); flex: none; }
.demo img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.demo img:nth-child(1) { animation: frameA 1.6s steps(1) infinite; }
.demo img:nth-child(2) { animation: frameB 1.6s steps(1) infinite; }
@keyframes frameA { 0% { opacity: 1; } 50% { opacity: 0; } }
@keyframes frameB { 0% { opacity: 0; } 50% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .demo img:nth-child(1), .demo img:nth-child(2) { animation: none; } .demo img:nth-child(2) { opacity: 0; } }
.demo.none { display: grid; place-items: center; text-align: center; background: var(--surface-2); color: var(--muted); font-size: .78rem; padding: 10px; }
.demo.none b { display: block; font-size: 1.8rem; }
.ex h3 { font-size: 1.1rem; margin: 0 0 4px; }
.ex .cue { color: var(--muted); margin: 6px 0 10px; }
.ex details { margin: 6px 0 8px; }
.ex summary { cursor: pointer; font-weight: 600; color: var(--accent); }
.ex ol { margin: 8px 0 0; padding-left: 1.2em; color: var(--text); font-size: .95rem; }
.check { display: inline-flex; align-items: center; gap: .55em; cursor: pointer; font-weight: 700; min-height: 44px; }
.check input { width: 24px; height: 24px; accent-color: var(--accent); }
.load { max-width: 140px; margin: 0 !important; min-height: 38px !important; padding: .35em .7em !important; }
@media (max-width: 520px) {
  .ex { grid-template-columns: 1fr; }
  .demo { width: 100%; height: auto; aspect-ratio: 1 / 1; max-width: 300px; }
}

/* progress tab */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin-bottom: 16px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 12px 14px; }
.stat small { color: var(--muted); display: block; font-weight: 600; }
.stat b { font-size: 1.5rem; letter-spacing: -.02em; }
.stat .delta { font-size: .85rem; font-weight: 600; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0 12px; }
.chart-wrap svg { width: 100%; height: auto; display: block; }
.chart-wrap .axis { stroke: var(--border); stroke-width: 1; }
.chart-wrap text { fill: var(--muted); font-size: 11px; font-family: inherit; }
.chart-wrap .line { fill: none; stroke: var(--accent); stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.chart-wrap .dot { fill: var(--surface); stroke: var(--accent); stroke-width: 2; }
.chart-wrap .area { fill: var(--accent); opacity: .08; }
.chart-wrap .band { fill: var(--good); opacity: .1; }
table.hist { width: 100%; border-collapse: collapse; font-size: .92rem; }
table.hist th, table.hist td { text-align: right; padding: 8px 6px; border-bottom: 1px solid var(--border); }
table.hist th:first-child, table.hist td:first-child { text-align: left; }
table.hist th { color: var(--muted); font-weight: 600; }
.scroll-x { overflow-x: auto; }

/* dialogs */
dialog { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); padding: 22px; width: min(440px, calc(100vw - 32px)); box-shadow: var(--shadow); }
dialog::backdrop { background: rgba(10, 5, 20, .55); }
.toast { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: .6em 1.1em; border-radius: 99px; font-weight: 600; z-index: 50; opacity: 0; pointer-events: none; transition: opacity .2s; }
.toast.show { opacity: 1; }
.safety dt { font-weight: 700; margin-top: 10px; }
.safety dd { margin: 2px 0 0; color: var(--muted); font-size: .95rem; }