/* Học Gym — giao diện */
:root {
  --paper: #FBF6EC;
  --paper-2: #F3EBDC;
  --card: #FFFCF6;
  --card-2: #FAF4E8;
  --ink: #25222A;
  --ink-2: #57525D;
  --ink-3: #7D7783;
  --line: #E4D9C5;
  --line-2: #D5C7AE;
  --pl: #1E3A6B; --pl-soft: #E0E8F5; --pl-mid: #9DB3D9;
  --bb: #6A3FA0; --bb-soft: #EEE5F8; --bb-mid: #C3A6E6;
  --pb: #3E4095; --pb-soft: #E4E4F6; --pb-mid: #A9AAE0;
  --amber: #A9620F; --amber-soft: #FAE9D0;
  --ok: #33704D; --ok-soft: #DDEFE3;
  --warn: #9A5B12; --warn-soft: #FBEBD3;
  --danger: #A23A2F; --danger-soft: #F8DFDA;
  --accent: var(--pl); --accent-soft: var(--pl-soft); --accent-mid: var(--pl-mid);
  --glow: #FF7A3D; --glow-deep: #D9481C; --glow-soft: #FFB98F;
  --body-fill: #EDE3D1; --body-line: #CDBFA6;
  --shadow: 0 1px 2px rgba(60, 45, 20, .06), 0 6px 18px rgba(60, 45, 20, .06);
  --radius: 14px; --radius-sm: 10px;
  --font: "Times New Roman", Times, "Liberation Serif", "Noto Serif", "DejaVu Serif", serif;
  --nav-h: 66px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #16151A; --paper-2: #1D1B22; --card: #211F27; --card-2: #26232D;
    --ink: #EFE9DE; --ink-2: #C3BCB0; --ink-3: #958E85; --line: #37333F; --line-2: #4A4553;
    --pl: #93B2E8; --pl-soft: #1E2A40; --pl-mid: #3F5885;
    --bb: #C6A6F2; --bb-soft: #2C2340; --bb-mid: #5D4688;
    --pb: #ABACF2; --pb-soft: #25264A; --pb-mid: #4E5096;
    --amber: #F0B565; --amber-soft: #3A2B17; --ok: #8CCFA6; --ok-soft: #1B3326;
    --warn: #F0B565; --warn-soft: #3A2B17; --danger: #F29A8F; --danger-soft: #3D211E;
    --body-fill: #2E2A35; --body-line: #4A4553;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 18px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #16151A; --paper-2: #1D1B22; --card: #211F27; --card-2: #26232D;
  --ink: #EFE9DE; --ink-2: #C3BCB0; --ink-3: #958E85; --line: #37333F; --line-2: #4A4553;
  --pl: #93B2E8; --pl-soft: #1E2A40; --pl-mid: #3F5885;
  --bb: #C6A6F2; --bb-soft: #2C2340; --bb-mid: #5D4688;
  --pb: #ABACF2; --pb-soft: #25264A; --pb-mid: #4E5096;
  --amber: #F0B565; --amber-soft: #3A2B17; --ok: #8CCFA6; --ok-soft: #1B3326;
  --warn: #F0B565; --warn-soft: #3A2B17; --danger: #F29A8F; --danger-soft: #3D211E;
  --body-fill: #2E2A35; --body-line: #4A4553;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 18px rgba(0, 0, 0, .25);
  color-scheme: dark;
}
.t-pl { --accent: var(--pl); --accent-soft: var(--pl-soft); --accent-mid: var(--pl-mid); }
.t-bb { --accent: var(--bb); --accent-soft: var(--bb-soft); --accent-mid: var(--bb-mid); }
.t-pb { --accent: var(--pb); --accent-soft: var(--pb-soft); --accent-mid: var(--pb-mid); }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--font); font-size: 18px; line-height: 1.55;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
img, svg { max-width: 100%; }
svg[viewBox="0 0 24 24"] { width: 20px; height: 20px; flex: none; }
a > svg[viewBox="0 0 24 24"]:last-child { color: var(--ink-3); }
a { color: var(--accent); text-underline-offset: 3px; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .5em; font-weight: 700; letter-spacing: .005em; }
h1 { font-size: 1.85rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 .8em; }
ul, ol { margin: 0 0 .8em; padding-left: 1.25em; }
li { margin: .25em 0; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 8px; top: -60px; background: var(--ink); color: var(--paper); padding: 10px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { top: 8px; }

/* ---------- Khung ---------- */
.shell { min-height: 100vh; min-height: 100dvh; }
.topbar {
  position: sticky; top: 0; z-index: 30; display: flex; align-items: center; gap: 10px;
  padding: calc(8px + env(safe-area-inset-top)) 16px 8px; background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: saturate(1.2) blur(8px); -webkit-backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); min-width: 0; }
.brand-mark { width: 38px; height: 38px; flex: none; }
.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-name { font-weight: 700; letter-spacing: .02em; font-size: 1.22rem; line-height: 1.1; white-space: nowrap; }
.brand-sub { font-size: .72rem; color: var(--ink-3); letter-spacing: .06em; white-space: nowrap; }
.topbar .spacer { flex: 1; }
.icon-btn {
  display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; border: 1px solid transparent;
  background: transparent; cursor: pointer; color: var(--ink-2);
}
.icon-btn:hover { background: var(--paper-2); }
.icon-btn svg { width: 22px; height: 22px; }

.sidebar { display: none; }
.main { padding: 18px 16px calc(var(--nav-h) + 28px + env(safe-area-inset-bottom)); max-width: 1120px; margin: 0 auto; }
.main:focus { outline: none; }

.bottomnav {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; display: grid; grid-template-columns: repeat(5, 1fr);
  background: var(--card); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom);
  box-shadow: 0 -4px 16px rgba(60, 45, 20, .05);
}
.bottomnav a {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; min-height: var(--nav-h);
  text-decoration: none; color: var(--ink-3); font-size: .74rem; letter-spacing: .02em; position: relative;
}
.bottomnav a svg { width: 24px; height: 24px; }
.bottomnav a[aria-current="page"] { color: var(--ink); font-weight: 700; }
.bottomnav a[aria-current="page"]::before {
  content: ""; position: absolute; top: 0; left: 28%; right: 28%; height: 3px; border-radius: 0 0 3px 3px; background: var(--accent);
}

@media (min-width: 1000px) {
  .shell { display: grid; grid-template-columns: 264px 1fr; }
  .topbar, .bottomnav { display: none; }
  .sidebar {
    display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; padding: 22px 16px 18px;
    border-right: 1px solid var(--line); background: var(--paper-2); overflow-y: auto;
  }
  .sidebar .brand { padding: 4px 8px 18px; border-bottom: 1px solid var(--line); margin-bottom: 14px; }
  .sidebar .brand-mark { width: 46px; height: 46px; }
  .sidebar .brand-name { font-size: 1.4rem; letter-spacing: .02em; white-space: normal; line-height: 1.1; }
  .sidebar .brand-sub { white-space: normal; }
  .sidebar { overflow-x: hidden; }
  .side-nav { display: flex; flex-direction: column; gap: 2px; }
  .side-nav a {
    display: flex; align-items: center; gap: 12px; min-height: 46px; padding: 0 12px; border-radius: 10px;
    text-decoration: none; color: var(--ink-2); font-size: 1.02rem;
  }
  .side-nav a svg { width: 22px; height: 22px; flex: none; }
  .side-nav a:hover { background: var(--card); color: var(--ink); }
  .side-nav a[aria-current="page"] { background: var(--card); color: var(--ink); font-weight: 700; box-shadow: inset 3px 0 0 var(--accent); }
  .side-foot { margin-top: auto; padding: 14px 8px 0; border-top: 1px solid var(--line); font-size: .84rem; color: var(--ink-3); }
  .side-timer { margin: 14px 0 6px; }
  .main { padding: 30px 36px 48px; width: 100%; }
}

.footer { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--ink-3); font-size: .86rem; text-align: center; }
@media (min-width: 1000px) { .footer { display: none; } }

/* ---------- Tiêu đề trang ---------- */
.page-head { margin-bottom: 18px; }
.eyebrow { font-size: .76rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 4px; font-weight: 700; }
.page-head h1 { margin-bottom: 4px; }
.page-head p { color: var(--ink-2); margin: 0; }
.crumbs { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: .9rem; margin-bottom: 10px; color: var(--ink-3); }
.crumbs a { color: var(--ink-2); text-decoration: none; display: inline-flex; align-items: center; min-height: 32px; }
.crumbs a:hover { text-decoration: underline; }

/* ---------- Thẻ & lưới ---------- */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.card + .card { margin-top: 14px; }
.grid > * + .card, .row > * + .card { margin-top: 0; }
.card h2, .card h3 { margin-top: 0; }
.card.flat { box-shadow: none; }
.card.tint { background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 25%, var(--line)); }
.card.band { border-top: 4px solid var(--accent); }
.stack > * + * { margin-top: 14px; }
.grid { display: grid; gap: 14px; }
@media (min-width: 720px) { .grid.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .grid.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 1100px) { .grid.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (min-width: 720px) and (max-width: 1099px) { .grid.g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.section { margin-top: 28px; }
.section-title { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.section-title h2 { margin: 0; font-size: 1.25rem; }
.section-title a { font-size: .92rem; white-space: nowrap; }
.rule { border: 0; border-top: 1px solid var(--line); margin: 18px 0; }
.muted { color: var(--ink-2); }
.small { font-size: .88rem; }
.tiny { font-size: .78rem; }
.num { font-variant-numeric: tabular-nums; }
.row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.row.nowrap { flex-wrap: nowrap; }
.grow { flex: 1; min-width: 0; }

/* ---------- Nút ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 18px;
  border-radius: 12px; border: 1px solid var(--line-2); background: var(--card); color: var(--ink); cursor: pointer;
  font-size: 1rem; font-weight: 700; text-decoration: none; line-height: 1.1; text-align: center;
}
.btn:hover { background: var(--paper-2); }
.btn svg { width: 20px; height: 20px; flex: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--card); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.soft { background: var(--accent-soft); border-color: transparent; color: var(--accent); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--accent); }
.btn.ghost:hover { background: var(--accent-soft); }
.btn.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--line)); }
.btn.danger.solid { background: var(--danger); color: var(--card); border-color: var(--danger); }
.btn.block { width: 100%; }
.btn.sm { min-height: 40px; padding: 0 12px; font-size: .92rem; border-radius: 10px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; min-height: 40px; padding: 0 14px; border-radius: 999px;
  border: 1px solid var(--line-2); background: var(--card); color: var(--ink-2); cursor: pointer; font-size: .95rem; text-decoration: none;
}
.chip[aria-pressed="true"], .chip.on { background: var(--accent); border-color: var(--accent); color: var(--card); font-weight: 700; }
.chip svg { width: 18px; height: 18px; }
.scroll-x { overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; margin: 0 -16px; padding: 2px 16px; }
.scroll-x::-webkit-scrollbar { display: none; }
.scroll-x .chips { flex-wrap: nowrap; }
.scroll-x .chip { white-space: nowrap; }

.seg { display: flex; gap: 4px; padding: 4px; border-radius: 14px; background: var(--paper-2); border: 1px solid var(--line); overflow-x: auto; scrollbar-width: none; }
.seg::-webkit-scrollbar { display: none; }
.seg a, .seg button {
  flex: 1 0 auto; display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 14px; border-radius: 10px;
  text-decoration: none; color: var(--ink-2); border: 0; background: transparent; cursor: pointer; font-size: .98rem; white-space: nowrap;
}
.seg [aria-current="page"], .seg [aria-pressed="true"] { background: var(--card); color: var(--ink); font-weight: 700; box-shadow: var(--shadow); }

.tag {
  display: inline-flex; align-items: center; gap: 4px; padding: 2px 9px; border-radius: 999px; font-size: .76rem;
  letter-spacing: .04em; background: var(--paper-2); color: var(--ink-2); border: 1px solid var(--line); white-space: nowrap; font-weight: 700;
}
.tag.pl { background: var(--pl-soft); color: var(--pl); border-color: transparent; }
.tag.bb { background: var(--bb-soft); color: var(--bb); border-color: transparent; }
.tag.pb { background: var(--pb-soft); color: var(--pb); border-color: transparent; }
.tag.ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.tag.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.tag.danger { background: var(--danger-soft); color: var(--danger); border-color: transparent; }
.tag.accent { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* ---------- Thông báo ---------- */
.note { display: flex; gap: 12px; padding: 14px 16px; border-radius: var(--radius-sm); background: var(--paper-2); border: 1px solid var(--line); font-size: .96rem; }
.note svg { width: 22px; height: 22px; flex: none; margin-top: 1px; }
.note > div > :last-child { margin-bottom: 0; }
.note.info { background: var(--accent-soft); border-color: transparent; }
.note.info svg { color: var(--accent); }
.note.warn { background: var(--warn-soft); border-color: transparent; }
.note.warn svg { color: var(--warn); }
.note.danger { background: var(--danger-soft); border-color: transparent; }
.note.danger svg { color: var(--danger); }
.note.ok { background: var(--ok-soft); border-color: transparent; }
.note.ok svg { color: var(--ok); }

/* ---------- Biểu mẫu ---------- */
.field { display: flex; flex-direction: column; gap: 6px; }
.field label, .label { font-size: .9rem; font-weight: 700; color: var(--ink-2); }
.field .hint { font-size: .82rem; color: var(--ink-3); }
.input, select.input, textarea.input {
  width: 100%; min-height: 48px; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line-2);
  background: var(--card); font-size: 18px; line-height: 1.3;
}
textarea.input { min-height: 90px; resize: vertical; }
.input:focus { border-color: var(--accent); outline: 2px solid color-mix(in srgb, var(--accent) 35%, transparent); outline-offset: 0; }
.input[aria-invalid="true"] { border-color: var(--danger); }
.form-grid { display: grid; gap: 14px; }
@media (min-width: 560px) { .form-grid.c2 { grid-template-columns: 1fr 1fr; } .form-grid.c3 { grid-template-columns: repeat(3, 1fr); } }
.check { display: flex; align-items: flex-start; gap: 12px; min-height: 44px; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); cursor: pointer; }
.check input { width: 22px; height: 22px; margin: 2px 0 0; accent-color: var(--accent); flex: none; }
.check.on { border-color: var(--accent); background: var(--accent-soft); }
.choice-grid { display: grid; gap: 10px; }
@media (min-width: 640px) { .choice-grid.c2 { grid-template-columns: 1fr 1fr; } .choice-grid.c3 { grid-template-columns: repeat(3, 1fr); } }
.choice {
  display: block; text-align: left; padding: 16px; border-radius: var(--radius); border: 1.5px solid var(--line);
  background: var(--card); cursor: pointer; width: 100%; color: var(--ink);
}
.choice:hover { border-color: var(--line-2); }
.choice[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--accent); }
.choice strong { display: block; font-size: 1.08rem; margin-bottom: 4px; }
.choice span { display: block; font-size: .92rem; color: var(--ink-2); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; border-radius: 20px; padding: 26px 20px; border: 1px solid var(--line);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--pl-soft) 90%, transparent) 0%, transparent 55%),
    linear-gradient(315deg, color-mix(in srgb, var(--bb-soft) 95%, transparent) 0%, transparent 55%),
    var(--card);
}
.hero h1 { font-size: 2.3rem; letter-spacing: .01em; }
.hero .lead { font-size: 1.08rem; color: var(--ink-2); max-width: 40em; }
.hero-art { position: absolute; right: -20px; bottom: -14px; width: 220px; opacity: .14; pointer-events: none; }
@media (min-width: 720px) { .hero { padding: 36px 34px; } .hero h1 { font-size: 3rem; } .hero-art { width: 320px; opacity: .18; } }
.track-card { display: block; text-decoration: none; color: var(--ink); border-left: 5px solid var(--accent); }
.track-card:hover { background: var(--card-2); }
.track-card h3 { color: var(--accent); }

/* ---------- Kế hoạch & buổi ---------- */
.plan-head { display: flex; align-items: flex-start; gap: 14px; }
.plan-badge {
  flex: none; width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center; background: var(--accent); color: var(--card);
  font-weight: 700; letter-spacing: .06em;
}
.week-strip { display: grid; grid-template-columns: repeat(8, 1fr); gap: 4px; margin: 12px 0 4px; }
.week-strip span { height: 8px; border-radius: 4px; background: var(--line); }
.week-strip span.done { background: var(--accent-mid); }
.week-strip span.now { background: var(--accent); }
.week-strip span.light { background: repeating-linear-gradient(45deg, var(--accent-mid), var(--accent-mid) 3px, transparent 3px, transparent 6px); }
.stepper { display: inline-flex; align-items: center; border: 1px solid var(--line-2); border-radius: 12px; overflow: hidden; background: var(--card); }
.stepper button { width: 44px; height: 44px; border: 0; background: transparent; cursor: pointer; font-size: 1.2rem; color: var(--ink-2); }
.stepper button:hover { background: var(--paper-2); }
.stepper span { min-width: 92px; text-align: center; font-weight: 700; padding: 0 6px; }

.ex-list { list-style: none; padding: 0; margin: 0; }
.ex-list li { display: flex; gap: 12px; align-items: baseline; padding: 10px 0; border-bottom: 1px dashed var(--line); margin: 0; }
.ex-list li:last-child { border-bottom: 0; }
.ex-list .idx { flex: none; width: 26px; height: 26px; border-radius: 50%; display: inline-grid; place-items: center; background: var(--accent-soft); color: var(--accent); font-size: .82rem; font-weight: 700; }
.ex-list .idx.key { background: var(--accent); color: var(--card); }
.ex-name { font-weight: 700; }
.ex-en { color: var(--ink-3); font-size: .88rem; font-style: italic; }
.rx { font-variant-numeric: tabular-nums; color: var(--ink-2); font-size: .94rem; }

.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.stat { padding: 12px; border-radius: 12px; background: var(--card-2); border: 1px solid var(--line); text-align: center; }
.stat b { display: block; font-size: 1.5rem; font-variant-numeric: tabular-nums; line-height: 1.1; }
.stat span { font-size: .78rem; color: var(--ink-3); letter-spacing: .03em; }

/* ---------- Bài trong buổi tập ---------- */
.entry { padding: 0; overflow: hidden; }
.entry-head { padding: 16px 16px 12px; border-bottom: 1px solid var(--line); background: var(--card-2); }
.entry-head h3 { margin: 0; font-size: 1.12rem; }
.entry-head h3 a { color: var(--ink); text-decoration: none; }
.entry-head h3 a:hover { text-decoration: underline; }
.entry-target { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: center; font-variant-numeric: tabular-nums; }
.entry-body { padding: 12px 16px 16px; }
.hint-box { font-size: .92rem; padding: 10px 12px; border-radius: 10px; background: var(--accent-soft); color: var(--ink); margin-bottom: 10px; }
.hint-box.up { background: var(--ok-soft); }
.hint-box.down { background: var(--warn-soft); }
.sets { width: 100%; border-collapse: separate; border-spacing: 0 6px; }
.sets th { font-size: .74rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); font-weight: 700; text-align: center; padding: 0 2px; }
.sets td { padding: 0 2px; text-align: center; vertical-align: middle; }
.sets td.lbl { width: 34px; font-weight: 700; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.sets td.lbl.w { color: var(--amber); font-size: .85rem; }
.sets input {
  width: 100%; min-width: 0; height: 46px; text-align: center; border-radius: 10px; border: 1px solid var(--line-2); background: var(--card);
  font-size: 18px; font-variant-numeric: tabular-nums; padding: 0 4px;
}
.sets input:focus { border-color: var(--accent); outline: 2px solid color-mix(in srgb, var(--accent) 30%, transparent); outline-offset: 0; }
.sets tr.done input { background: var(--ok-soft); border-color: color-mix(in srgb, var(--ok) 40%, var(--line)); }
.sets tr.warm input { border-style: dashed; }
.set-check {
  width: 46px; height: 46px; border-radius: 12px; border: 1.5px solid var(--line-2); background: var(--card); cursor: pointer;
  display: inline-grid; place-items: center; color: var(--ink-3);
}
.set-check svg { width: 22px; height: 22px; }
tr.done .set-check { background: var(--ok); border-color: var(--ok); color: var(--card); }
.set-del { width: 36px; height: 46px; border: 0; background: transparent; color: var(--ink-3); cursor: pointer; border-radius: 10px; display: inline-grid; place-items: center; }
.set-del:hover { color: var(--danger); background: var(--danger-soft); }
.set-del svg { width: 18px; height: 18px; }
.col-kg { width: 26%; } .col-rep { width: 19%; } .col-eff { width: 19%; }
.entry-tools { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.entry-more { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--line); }
.entry-more summary { cursor: pointer; color: var(--ink-2); font-size: .92rem; min-height: 36px; display: flex; align-items: center; }
.session-bar {
  position: sticky; bottom: calc(var(--nav-h) + env(safe-area-inset-bottom) + 8px); z-index: 20; margin-top: 18px;
  display: flex; gap: 10px; padding: 10px; border-radius: 16px; background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow);
}
@media (min-width: 1000px) { .session-bar { bottom: 16px; } }

/* ---------- Bài học ---------- */
.module-card { display: block; text-decoration: none; color: var(--ink); }
.progress { height: 8px; border-radius: 4px; background: var(--line); overflow: hidden; }
.progress > span { display: block; height: 100%; background: var(--accent); border-radius: 4px; }
.lesson-list { list-style: none; padding: 0; margin: 0; counter-reset: ls; }
.lesson-list li { margin: 0; border-bottom: 1px solid var(--line); }
.lesson-list li:last-child { border-bottom: 0; }
.lesson-list a { display: flex; gap: 14px; align-items: center; padding: 12px 4px; text-decoration: none; color: var(--ink); min-height: 56px; }
.lesson-list a:hover .l-title { text-decoration: underline; }
.l-num { flex: none; width: 34px; height: 34px; border-radius: 50%; border: 1.5px solid var(--line-2); display: grid; place-items: center; font-size: .9rem; font-weight: 700; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.l-num.done { background: var(--accent); border-color: var(--accent); color: var(--card); }
.l-num svg { width: 18px; height: 18px; }
.l-title { font-weight: 700; display: block; }
.l-meta { font-size: .84rem; color: var(--ink-3); }

.article { max-width: 760px; }
.article h2 { margin-top: 1.6em; font-size: 1.3rem; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
.article .lead { font-size: 1.12rem; color: var(--ink-2); }
.article p, .article li { font-size: 1.04rem; }
.obj-box { border-left: 4px solid var(--accent); background: var(--accent-soft); padding: 14px 16px; border-radius: 0 12px 12px 0; }
.obj-box ul { margin: 6px 0 0; }
.example-box { background: var(--card-2); border: 1px solid var(--line); border-radius: 12px; padding: 16px; position: relative; }
.example-box::before { content: "Ví dụ"; position: absolute; top: -11px; left: 14px; background: var(--accent); color: var(--card); font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; padding: 2px 10px; border-radius: 999px; font-weight: 700; }
.list-x li::marker { color: var(--danger); }
.list-check { list-style: none; padding-left: 0; }
.list-check li { position: relative; padding-left: 30px; }
.list-check li::before { content: ""; position: absolute; left: 4px; top: .45em; width: 14px; height: 8px; border-left: 2.5px solid var(--ok); border-bottom: 2.5px solid var(--ok); transform: rotate(-45deg); }
.takeaways { counter-reset: tk; list-style: none; padding: 0; display: grid; gap: 10px; }
.takeaways li { counter-increment: tk; display: flex; gap: 12px; align-items: flex-start; margin: 0; padding: 12px 14px; border-radius: 12px; background: var(--card); border: 1px solid var(--line); }
.takeaways li::before { content: counter(tk); flex: none; width: 28px; height: 28px; border-radius: 50%; background: var(--accent); color: var(--card); display: grid; place-items: center; font-weight: 700; font-size: .9rem; }
.quiz-q { margin-bottom: 18px; }
.quiz-q p { font-weight: 700; margin-bottom: 8px; }
.quiz-opt { display: block; width: 100%; text-align: left; padding: 12px 14px; margin-bottom: 8px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--card); cursor: pointer; min-height: 48px; }
.quiz-opt:hover { border-color: var(--line-2); }
.quiz-opt.right { border-color: var(--ok); background: var(--ok-soft); }
.quiz-opt.wrong { border-color: var(--danger); background: var(--danger-soft); }
.quiz-explain { font-size: .94rem; padding: 10px 12px; border-radius: 10px; background: var(--paper-2); }
.lesson-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 28px; }
.lesson-nav a { display: block; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line); text-decoration: none; color: var(--ink); background: var(--card); min-height: 64px; }
.lesson-nav a small { display: block; color: var(--ink-3); font-size: .8rem; }
.lesson-nav a.next { text-align: right; }

/* ---------- Thư viện bài tập ---------- */
.search { position: relative; }
.search svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); width: 20px; height: 20px; color: var(--ink-3); pointer-events: none; }
.search .input { padding-left: 44px; }
.ex-card { display: flex; gap: 14px; align-items: center; text-decoration: none; color: var(--ink); padding: 14px; }
.ex-card:hover { background: var(--card-2); }
.ex-card .grow > * { display: block; }
.detail-grid { display: grid; gap: 16px; }
@media (min-width: 900px) { .detail-grid { grid-template-columns: 340px 1fr; align-items: start; } .detail-aside { position: sticky; top: 24px; } }
.bodymap { width: 100%; height: auto; display: block; }
.bodymap .sil { fill: url(#gdaBody); stroke: rgba(120,70,40,.35); stroke-width: 1; }
.bodymap .m { fill: rgba(170,95,60,.10); stroke: rgba(130,70,40,.38); stroke-width: .8; }
.bodymap .p { fill: url(#gdaMusP); stroke: var(--glow-deep); stroke-width: .9; }
.bodymap .s { fill: url(#gdaMusS); stroke: var(--glow); stroke-width: .8; stroke-opacity: .7; }
.bodymap .ln { fill: none; stroke: rgba(130,70,40,.28); stroke-width: .9; }
.bodymap text { font-family: var(--font); font-size: 11px; fill: var(--ink-3); letter-spacing: .1em; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: .86rem; color: var(--ink-2); }
.legend i { display: inline-block; width: 14px; height: 14px; border-radius: 4px; vertical-align: -2px; margin-right: 6px; }
.legend i.lp { background: linear-gradient(var(--glow), var(--glow-deep)); }
.legend i.ls { background: var(--glow-soft); }
.steps-list { counter-reset: st; list-style: none; padding: 0; }
.steps-list li { counter-increment: st; position: relative; padding-left: 40px; margin: 10px 0; }
.steps-list li::before { content: counter(st); position: absolute; left: 0; top: 0; width: 28px; height: 28px; border-radius: 8px; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; font-weight: 700; font-size: .9rem; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; font-size: .96rem; }
.kv dt { color: var(--ink-3); }
.kv dd { margin: 0; font-weight: 700; }

/* ---------- Bảng ---------- */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.data { width: 100%; border-collapse: collapse; font-size: .96rem; font-variant-numeric: tabular-nums; }
table.data th, table.data td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.data th { font-size: .78rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
table.data td.r, table.data th.r { text-align: right; }
table.data tr.hl td { background: var(--accent-soft); }
.bar-cell { display: flex; align-items: center; gap: 8px; }
.bar-cell .bar { height: 10px; border-radius: 5px; background: var(--accent); min-width: 2px; }
.bar-cell .bar.ind { background: var(--accent-mid); }

/* ---------- Công cụ ---------- */
.big-result { font-size: 2.6rem; font-weight: 700; line-height: 1.05; font-variant-numeric: tabular-nums; color: var(--accent); }
.big-result small { font-size: 1rem; color: var(--ink-2); font-weight: 400; }
.plate-viz { width: 100%; height: auto; display: block; }
.plate-list { display: flex; flex-wrap: wrap; gap: 6px; }
.plate-chip { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); font-variant-numeric: tabular-nums; font-weight: 700; font-size: .92rem; background: var(--card); }
.plate-chip i { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }
.inv-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center; padding: 6px 0; border-bottom: 1px dashed var(--line); }
.timer-wrap { display: grid; place-items: center; margin: 8px auto 4px; position: relative; width: min(260px, 70vw); aspect-ratio: 1; }
.timer-wrap svg { position: absolute; inset: 0; width: 100%; height: 100%; transform: rotate(-90deg); }
.timer-wrap .track { fill: none; stroke: var(--line); stroke-width: 8; }
.timer-wrap .ring { fill: none; stroke: var(--amber); stroke-width: 8; stroke-linecap: round; transition: stroke-dashoffset .25s linear; }
.timer-text { font-size: 3.2rem; font-weight: 700; font-variant-numeric: tabular-nums; text-align: center; line-height: 1; }
.timer-text small { display: block; font-size: .9rem; font-weight: 400; color: var(--ink-3); margin-top: 6px; }
.timer-pill {
  display: inline-flex; align-items: center; gap: 6px; min-height: 40px; padding: 0 12px; border-radius: 999px; border: 0;
  background: var(--amber-soft); color: var(--amber); font-weight: 700; font-variant-numeric: tabular-nums; cursor: pointer; text-decoration: none; font-size: 1rem;
}
.timer-pill svg { width: 18px; height: 18px; }
.timer-pill[hidden] { display: none; }

/* ---------- Biểu đồ ---------- */
.chart { width: 100%; height: auto; display: block; overflow: visible; }
.chart .grid-l { stroke: var(--line); stroke-width: 1; }
.chart .axis-t { font-family: var(--font); font-size: 12px; fill: var(--ink-3); }
.chart .line { fill: none; stroke: var(--accent); stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.chart .area { fill: var(--accent-soft); opacity: .7; }
.chart .dot { fill: var(--card); stroke: var(--accent); stroke-width: 2.5; }
.chart .dot.best { fill: var(--accent); }
.empty { text-align: center; padding: 28px 16px; color: var(--ink-2); }
.empty svg { width: 46px; height: 46px; color: var(--ink-3); margin-bottom: 6px; }

/* ---------- Hộp thoại & thông báo nổi ---------- */
dialog.modal {
  border: 1px solid var(--line); border-radius: 18px; padding: 0; width: min(560px, calc(100vw - 24px)); max-height: calc(100dvh - 40px);
  background: var(--card); color: var(--ink); box-shadow: 0 20px 60px rgba(0, 0, 0, .25);
}
dialog.modal::backdrop { background: rgba(30, 24, 18, .45); }
.modal-head { padding: 18px 20px 6px; }
.modal-head h2 { margin: 0; font-size: 1.25rem; }
.modal-body { padding: 8px 20px 12px; overflow-y: auto; max-height: calc(100dvh - 200px); }
.modal-foot { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; padding: 12px 20px 18px; border-top: 1px solid var(--line); }
.pick-list { list-style: none; padding: 0; margin: 8px 0 0; max-height: 50vh; overflow-y: auto; }
.pick-list button { display: flex; width: 100%; text-align: left; gap: 10px; align-items: baseline; padding: 12px 8px; border: 0; border-bottom: 1px solid var(--line); background: transparent; cursor: pointer; min-height: 52px; flex-wrap: wrap; }
.pick-list button:hover { background: var(--paper-2); }
.toast-host { position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(var(--nav-h) + 18px + env(safe-area-inset-bottom)); z-index: 90; display: flex; flex-direction: column; gap: 8px; width: min(440px, calc(100vw - 32px)); pointer-events: none; }
@media (min-width: 1000px) { .toast-host { bottom: 24px; } }
.toast { pointer-events: auto; padding: 12px 16px; border-radius: 12px; background: var(--ink); color: var(--paper); box-shadow: var(--shadow); font-size: .96rem; display: flex; gap: 10px; align-items: center; }
.toast.warn { background: var(--warn); color: #fff; }
.toast.danger { background: var(--danger); color: #fff; }
.toast button { margin-left: auto; background: transparent; border: 1px solid currentColor; color: inherit; border-radius: 8px; min-height: 34px; padding: 0 10px; cursor: pointer; }

.save-dot { display: inline-flex; align-items: center; gap: 6px; font-size: .78rem; color: var(--ink-3); }
.save-dot::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--ok); }
.save-dot.bad::before { background: var(--danger); }
.save-dot.bad { color: var(--danger); font-weight: 700; }

.source-list { list-style: none; padding: 0; margin: 0; }
.source-list li { padding: 12px 0; border-bottom: 1px solid var(--line); margin: 0; }
.source-list li:last-child { border-bottom: 0; }
.src-key { display: inline-block; min-width: 38px; font-weight: 700; color: var(--accent); }
.src-inline { display: inline-flex; flex-wrap: wrap; gap: 6px; }
.src-inline a, .src-inline span { font-size: .8rem; padding: 1px 8px; border-radius: 6px; background: var(--paper-2); border: 1px solid var(--line); text-decoration: none; color: var(--ink-2); }

@media (prefers-reduced-motion: no-preference) {
  .card, .btn, .chip, .choice, .quiz-opt { transition: background-color .15s ease, border-color .15s ease, box-shadow .15s ease; }
  .view-enter { animation: fadeUp .22s ease-out; }
  @keyframes fadeUp { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}
@media print {
  .topbar, .bottomnav, .sidebar, .session-bar, .toast-host, .btn, .chip { display: none !important; }
  body { background: #fff; }
  .card { box-shadow: none; }
}
.sets { max-width: 680px; }
.timer-pill [data-icon] { display: inline-flex; }

.chart { max-width: 860px; margin: 0 auto; }
.stat span { display: block; line-height: 1.25; margin-top: 2px; }
.topbar .brand-name, .topbar .brand-sub { overflow: hidden; text-overflow: ellipsis; }
@media (max-width: 380px) { .topbar .brand-name { font-size: 1.1rem; } .topbar .brand-mark { width: 34px; height: 34px; } }

h1[tabindex="-1"]:focus { outline: none; }

/* ---------- Hình minh họa & ảnh động ---------- */
.fig-thumb { display: block; width: 100%; height: 100%; }
.ex-thumb { flex: none; width: 112px; height: 84px; border-radius: 12px; overflow: hidden; background: radial-gradient(ellipse at 50% 35%, var(--card) 0%, var(--card-2) 100%); border: 1px solid var(--line); }
.ex-card { gap: 14px; padding: 12px; }
@media (max-width: 420px) { .ex-thumb { width: 96px; height: 72px; } }

.demo { margin: 0; }
.demo-stage { position: relative; aspect-ratio: 4 / 3; border-radius: 14px; overflow: hidden; border: 1px solid var(--line);
  background: radial-gradient(ellipse at 50% 30%, var(--card) 0%, var(--card-2) 70%, var(--paper-2) 100%); }
.demo-svg { width: 100%; height: 100%; display: block; }
.demo-phase { margin: 8px 0 0; min-height: 2.6em; display: flex; align-items: center; justify-content: center; text-align: center; }
.demo-phase span { font-size: .95rem; font-weight: 700; color: var(--ink); line-height: 1.3; }
.demo-bar { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
.demo-btn, .demo-speed { flex: none; min-width: 44px; height: 44px; border-radius: 12px; border: 1px solid var(--line-2); background: var(--card); color: var(--ink); cursor: pointer; display: inline-grid; place-items: center; font-weight: 700; font-size: .95rem; }
.demo-btn { background: var(--accent); border-color: var(--accent); color: var(--card); }
.demo-btn svg { width: 20px; height: 20px; }
.demo-scrub { flex: 1; min-width: 0; accent-color: var(--accent); height: 44px; }
.demo-steps { list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 6px; }
.demo-steps li { display: flex; gap: 10px; align-items: center; margin: 0; padding: 8px 10px; border-radius: 10px; font-size: .92rem; color: var(--ink-2); border: 1px solid transparent; }
.demo-steps li span { flex: none; width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; background: var(--paper-2); font-size: .8rem; font-weight: 700; color: var(--ink-3); }
.demo-steps li.on { background: var(--accent-soft); color: var(--ink); border-color: color-mix(in srgb, var(--accent) 25%, transparent); }
.demo-steps li.on span { background: var(--accent); color: var(--card); }
.demo-note { font-size: .86rem; color: var(--ink-3); margin: 10px 0 0; }
.demo-card { padding: 14px; }
.glow-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 6px; vertical-align: -1px; background: radial-gradient(var(--glow), var(--glow-deep)); }
@media (min-width: 900px) { .detail-grid { grid-template-columns: minmax(340px, 420px) 1fr; } }
.muscle-grid { display: grid; gap: 14px; align-items: center; }
@media (min-width: 640px) { .muscle-grid { grid-template-columns: minmax(220px, 1fr) 1fr; } }

.li-thumb { position: relative; flex: none; width: 76px; height: 57px; padding: 0; border-radius: 10px; overflow: hidden; border: 1px solid var(--line); background: var(--card-2); cursor: pointer; }
.li-thumb .idx { position: absolute; left: 4px; top: 4px; width: 20px; height: 20px; font-size: .72rem; box-shadow: 0 0 0 2px var(--card); }
.ex-list li { align-items: center; }
.entry-thumb { position: relative; flex: none; width: 72px; height: 54px; padding: 0; border-radius: 10px; overflow: hidden; border: 1px solid var(--line); background: var(--card); cursor: pointer; }
.entry-thumb > svg[viewBox="0 0 24 24"] { position: absolute; right: 4px; bottom: 4px; width: 18px; height: 18px; padding: 3px; border-radius: 50%; background: var(--accent); color: var(--card); }
.entry-head .row { align-items: center; }
.td-ex { display: flex; gap: 10px; align-items: center; }
.td-thumb { flex: none; width: 56px; height: 42px; padding: 0; border-radius: 8px; overflow: hidden; border: 1px solid var(--line); background: var(--card-2); cursor: pointer; }
.pick-list button { align-items: center; flex-wrap: nowrap; }
.fig-thumb.pick { flex: none; width: 64px; height: 48px; border-radius: 8px; background: var(--card-2); border: 1px solid var(--line); }
.alt-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.alt-card { display: flex; flex-direction: column; gap: 6px; padding: 8px; border-radius: 12px; border: 1px solid var(--line); background: var(--card); text-decoration: none; color: var(--ink); }
.alt-card:hover { background: var(--card-2); }
.alt-card .fig-thumb { height: auto; aspect-ratio: 4 / 3; border-radius: 8px; background: var(--card-2); }
.alt-card span { display: flex; flex-direction: column; gap: 4px; font-size: .92rem; }
.alt-card em { font-style: normal; align-self: flex-start; }
.lesson-fig { margin: 18px 0 0; padding: 14px; }
.lesson-demo { max-width: 520px; margin: 0 auto; }
.info-svg { width: 100%; height: auto; display: block; }
dialog.modal .demo-stage { max-height: 52vh; }