@import url('./brand-tokens.css');
@import url('./notation.css');


*,
*::before,
*::after { box-sizing: border-box; }

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  min-width: 300px;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 90% 0%, rgba(var(--gold-rgb), .18), transparent 31rem),
    radial-gradient(circle at 3% 38%, rgba(var(--art-lapis-rgb), .09), transparent 26rem),
    linear-gradient(160deg, var(--byan-dark) 0%, var(--paper) 44%, var(--art-lapis-dark) 100%);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: '';
  pointer-events: none;
  opacity: .23;
  background-image: repeating-linear-gradient(105deg, transparent 0 11px, rgba(var(--cream-2-rgb), .025) 12px 13px);
}

body.has-dialog { overflow: hidden; }

button,
input,
select,
textarea { font: inherit; }

button,
a,
input,
select,
summary { -webkit-tap-highlight-color: transparent; }

button,
.button,
.nav-link,
summary,
select,
input[type='file'] { min-height: 44px; }

button { color: inherit; }

a { color: var(--teal); }

a:hover { color: var(--wood); }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

[hidden] { display: none !important; }

.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-link {
  position: fixed;
  top: 10px;
  right: 10px;
  z-index: 1000;
  padding: 9px 15px;
  border-radius: 10px;
  color: var(--cream);
  background: var(--wood-dark);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(var(--byan-dark-rgb), .89);
  backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  width: min(calc(100% - 36px), var(--content));
  min-height: 74px;
  margin-inline: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  color: var(--wood-dark);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 43px;
  height: 43px;
  place-items: center;
  border: 1px solid rgba(var(--cream-2-rgb), .42);
  border-radius: 50%;
  color: var(--paper);
  background: var(--wood-dark);
  box-shadow: inset 0 0 0 4px var(--brass-light);
  font-family: var(--font-ui);
  font-weight: 700;
}

.brand-copy { line-height: 1.18; }
.brand-copy strong { display: block; font-family: var(--font-ui); }
.brand-copy small { color: var(--ink-soft); font-size: .72rem; }

.desktop-nav {
  display: flex;
  align-self: stretch;
  align-items: center;
  justify-content: center;
  gap: 5px;
  margin-inline: auto;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 12px;
  color: var(--ink-soft);
  font-weight: 700;
  text-decoration: none;
}

.nav-link:hover { color: var(--wood-dark); background: rgba(var(--cream-2-rgb), .06); }
.nav-link.is-active { color: var(--wood-dark); background: var(--info-surface); }
.nav-link.is-active::after {
  position: absolute;
  right: 20%;
  bottom: -1px;
  left: 20%;
  height: 3px;
  border-radius: 4px 4px 0 0;
  content: '';
  background: var(--brass);
}

.nav-mark { color: var(--brass); font-size: .9rem; }

.header-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 8px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 99px;
  color: var(--wood-dark);
  background: transparent;
  font-weight: 700;
  text-decoration: none;
}

.page-main {
  width: min(calc(100% - 36px), var(--content));
  margin-inline: auto;
  padding-block: 44px 94px;
}

.page-heading,
.hero-grid {
  display: grid;
  gap: 24px;
  margin-bottom: 32px;
}

.hero-grid { grid-template-columns: minmax(0, 1.45fr) minmax(280px, .72fr); align-items: stretch; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 9px;
  color: var(--crimson);
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .03em;
}

.eyebrow::before {
  width: 25px;
  height: 2px;
  content: '';
  background: currentColor;
}

h1,
h2,
h3,
p { margin-top: 0; }

h1,
h2,
h3 {
  color: var(--wood-dark);
  font-family: var(--font-ui);
  line-height: 1.35;
}

h1 { margin-bottom: 14px; font-size: clamp(2rem, 5vw, 3.65rem); letter-spacing: -.035em; }
h2 { margin-bottom: 12px; font-size: clamp(1.35rem, 2.5vw, 2rem); }
h3 { margin-bottom: 9px; font-size: 1.08rem; }

.lede {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.8vw, 1.16rem);
}

.hero-panel,
.card,
.session-card,
.detail-surface,
.lab-surface,
.data-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.hero-copy {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 58px);
  border-radius: var(--radius-lg);
  color: var(--cream);
  background: linear-gradient(145deg, var(--byan-dark) 0%, var(--byan-mid) 57%, var(--art-lapis-dark) 100%);
  box-shadow: var(--shadow-lg);
}

.hero-copy::after {
  position: absolute;
  bottom: -115px;
  left: -85px;
  width: 310px;
  height: 310px;
  border: 1px solid rgba(var(--gold-light-rgb), .4);
  border-radius: 50%;
  content: '';
  box-shadow: 0 0 0 28px rgba(var(--gold-light-rgb), .06), 0 0 0 55px rgba(var(--gold-light-rgb), .04);
}

.hero-copy h1 { color: var(--cream); }
.hero-copy .eyebrow { color: var(--brass-light); }
.hero-copy .lede { position: relative; z-index: 1; color: rgba(var(--cream-rgb), .77); }

.hero-aside { display: grid; gap: 14px; padding: 26px; }

.date-pill {
  display: inline-flex;
  align-items: center;
  align-self: start;
  gap: 8px;
  width: fit-content;
  padding: 6px 11px;
  border-radius: 99px;
  color: var(--teal);
  background: var(--teal-soft);
  font-size: .8rem;
  font-weight: 800;
}

.recommendation-name { margin-bottom: 3px; font-size: 1.55rem; }
.recommendation-reason { margin: 0; color: var(--ink-soft); }

.section-block { margin-top: 44px; }

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.section-head p { max-width: 650px; margin-bottom: 0; color: var(--ink-soft); }

.button-row { display: flex; flex-wrap: wrap; gap: 10px; }

.button,
button.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 46px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 13px;
  cursor: pointer;
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
  text-decoration: none;
  transition: transform .16s ease, box-shadow .16s ease, background-color .16s ease;
}

.button:hover { transform: translateY(-1px); }
.button:active { transform: translateY(1px); }
.button-primary { color: var(--cream); background: var(--teal); box-shadow: 0 8px 18px rgba(var(--art-lapis-rgb), .18); }
.button-primary:hover { color: var(--cream); background: var(--art-lapis-dark); }
.button-brass { color: var(--wood-dark); background: linear-gradient(135deg, var(--brass-light), var(--byan-gold)); }
.button-brass:hover { color: var(--wood-dark); }
.button-secondary { border-color: var(--line-strong); color: var(--wood-dark); background: rgba(var(--cream-rgb), .65); }
.button-secondary:hover { color: var(--wood-dark); background: var(--cream); }
.button-quiet { border-color: transparent; color: var(--teal); background: transparent; }
.button-danger { border-color: rgba(var(--danger-rgb), .35); color: var(--crimson); background: var(--crimson-soft); }
.button[disabled], .button.is-disabled { opacity: .5; cursor: not-allowed; pointer-events: none; box-shadow: none; }

.session-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

.session-card {
  position: relative;
  display: flex;
  min-height: 280px;
  flex-direction: column;
  padding: 23px;
  overflow: hidden;
}

.session-card::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 5px;
  content: '';
  background: var(--session-color, var(--brass));
}

.session-card:nth-child(2) { --session-color: var(--teal); }
.session-card:nth-child(3) { --session-color: var(--crimson); }

.session-order {
  display: grid;
  width: 38px;
  height: 38px;
  margin-bottom: 22px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--wood-dark);
  background: var(--paper-deep);
  font-weight: 800;
}

.session-card p { color: var(--ink-soft); }
.session-card .button { width: 100%; margin-top: auto; }

.time-label,
.micro-label {
  color: var(--ink-soft);
  font-size: .78rem;
  font-weight: 700;
}

.progress-line {
  width: 100%;
  height: 8px;
  margin-block: 8px 4px;
  overflow: hidden;
  border-radius: 99px;
  background: var(--line-strong);
}

.progress-line > span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--teal);
}

.quick-tools { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }

.tool-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 21px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  background: rgba(var(--cream-rgb), .55);
  text-decoration: none;
}

.tool-card:hover { color: var(--ink); border-color: var(--line-strong); background: var(--cream); }

.tool-mark {
  display: grid;
  width: 52px;
  height: 52px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 16px;
  color: var(--wood-dark);
  background: var(--warning-surface);
  font-size: 1.25rem;
  font-weight: 800;
}

.tool-card:nth-child(2) .tool-mark { color: var(--teal); background: var(--teal-soft); }
.tool-card.is-rhythm-assessed { border-color: rgba(var(--art-lapis-rgb), .32); background: linear-gradient(135deg, rgba(var(--art-lapis-light-rgb), .72), rgba(var(--cream-rgb), .74)); }
.tool-copy { min-width: 0; }
.tool-copy strong { display: block; color: var(--wood-dark); font-family: var(--font-ui); }
.tool-copy span { color: var(--ink-soft); font-size: .88rem; }
.tool-copy .tool-status { display: block; margin-top: 5px; color: var(--teal); font-size: .74rem; font-weight: 800; line-height: 1.5; }

.notice {
  padding: 16px 18px;
  border: 1px solid rgba(var(--gold-rgb), .28);
  border-radius: var(--radius-sm);
  color: var(--warning-text);
  background: var(--warning-surface);
}

.notice[data-tone='success'] { border-color: rgba(var(--success-rgb), .28); color: var(--success-text); background: var(--green-soft); }
.notice[data-tone='danger'] { border-color: rgba(var(--danger-rgb), .28); color: var(--danger-text); background: var(--crimson-soft); }
.notice p:last-child { margin-bottom: 0; }

.empty-state { padding: 30px; text-align: center; color: var(--ink-soft); }

dialog.onboarding-dialog {
  width: min(calc(100% - 28px), 720px);
  max-height: min(92vh, 820px);
  padding: 0;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 28px;
  color: var(--ink);
  background: var(--surface-solid);
  box-shadow: 0 35px 110px rgba(var(--shadow-rgb), .38);
}

dialog.onboarding-dialog::backdrop { background: rgba(var(--shadow-rgb), .64); backdrop-filter: blur(5px); }

.onboarding-shell { padding: clamp(24px, 5vw, 42px); }
.onboarding-top { display: flex; align-items: start; justify-content: space-between; gap: 20px; }

.step-indicator {
  display: inline-flex;
  gap: 7px;
  margin-bottom: 18px;
}

.step-indicator span { width: 28px; height: 5px; border-radius: 99px; background: var(--line-strong); }
.step-indicator span.is-active { background: var(--teal); }

.choice-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-block: 20px; }
.choice-grid.level-grid { grid-template-columns: repeat(3, 1fr); }

.choice-card { position: relative; }
.choice-card input { position: absolute; opacity: 0; pointer-events: none; }
.choice-card label {
  display: flex;
  min-height: 118px;
  flex-direction: column;
  justify-content: center;
  padding: 17px;
  border: 2px solid var(--line);
  border-radius: 17px;
  cursor: pointer;
  background: var(--cream);
}
.choice-card label strong { display: block; color: var(--wood-dark); }
.choice-card label small { color: var(--ink-soft); line-height: 1.55; }
.choice-card input:checked + label { border-color: var(--teal); background: var(--teal-soft); box-shadow: 0 0 0 3px rgba(var(--art-lapis-rgb), .12); }
.choice-card input:focus-visible + label { outline: 3px solid var(--focus); outline-offset: 3px; }

.known-maqams { padding: 18px; border-radius: var(--radius); background: var(--paper); }
.check-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 16px; }
.check-item { display: flex; align-items: center; gap: 9px; min-height: 44px; }
.check-item input { width: 20px; height: 20px; accent-color: var(--teal); }
.dialog-actions { display: flex; justify-content: space-between; gap: 12px; margin-top: 26px; }

.explorer-layout { display: grid; grid-template-columns: minmax(280px, .72fr) minmax(0, 1.6fr); gap: 22px; align-items: start; }

.family-browser {
  position: sticky;
  top: 96px;
  max-height: calc(100vh - 120px);
  padding: 12px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(var(--cream-rgb), .63);
}

.family-group { margin-bottom: 8px; border: 1px solid transparent; border-radius: 14px; background: rgba(var(--cream-rgb), .75); }
.family-group[open] { border-color: var(--family-color, var(--brass)); background: var(--cream); }
.family-group summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  cursor: pointer;
  list-style: none;
  color: var(--wood-dark);
  font-weight: 800;
}
.family-group summary::-webkit-details-marker { display: none; }
.family-group summary::before { width: 10px; height: 10px; flex: 0 0 auto; border: 2px solid var(--family-color, var(--brass)); border-radius: 50%; content: ''; }
.family-group[open] summary::before { background: var(--family-color, var(--brass)); }
.family-count { margin-inline-start: auto; color: var(--ink-soft); font-size: .73rem; font-weight: 600; }

.branch-list { display: grid; gap: 3px; padding: 0 8px 9px; }
.branch-button {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 8px;
  width: 100%;
  min-height: 45px;
  padding: 8px 10px;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  text-align: right;
  background: transparent;
}
.branch-button:hover { background: var(--paper); }
.branch-button.is-active { color: var(--wood-dark); background: var(--info-surface); box-shadow: inset -3px 0 var(--family-color, var(--brass)); }

.status-badge,
.mini-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  min-height: 27px;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 99px;
  color: var(--ink-soft);
  background: var(--surface-hover);
  font-size: .68rem;
  font-weight: 800;
  white-space: nowrap;
}
.status-badge::before { width: 6px; height: 6px; border-radius: 50%; content: ''; background: currentColor; }
.status-badge.is-practice { border-color: rgba(var(--success-rgb), .22); color: var(--green); background: var(--green-soft); }
.status-badge.is-soon { color: var(--warning-text); background: var(--warning-surface); }
.status-badge.progress-unseen{color:var(--ink-soft);background:var(--surface-hover)}.status-badge.progress-heard{color:var(--warning-text);background:var(--warning-surface)}.status-badge.progress-practiced,.status-badge.progress-jins{color:var(--warning-text);background:var(--warning-surface)}.status-badge.progress-up,.status-badge.progress-down{color:var(--teal);background:var(--info-surface)}.status-badge.progress-mastered{color:var(--green);background:var(--green-soft);font-weight:800}
.branch-button.progress-heard{box-shadow:inset -3px 0 var(--byan-gold)}.branch-button.progress-practiced,.branch-button.progress-jins{box-shadow:inset -3px 0 var(--brass)}.branch-button.progress-up,.branch-button.progress-down{box-shadow:inset -3px 0 var(--teal)}.branch-button.progress-mastered{box-shadow:inset -4px 0 var(--green);background:var(--green-soft)}

.detail-surface { min-height: 600px; overflow: hidden; }
.detail-cover { position: relative; padding: clamp(24px, 4vw, 40px); border-bottom: 1px solid var(--line); background: linear-gradient(135deg, var(--surface-solid), var(--surface-lapis)); }
.detail-cover::before { position: absolute; top: 0; right: 0; bottom: 0; width: 7px; content: ''; background: var(--family-color, var(--brass)); }
.detail-title-row { display: flex; align-items: start; justify-content: space-between; gap: 18px; }
.detail-subtitle { max-width: 690px; margin-bottom: 0; color: var(--ink-soft); }

.meta-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 24px; }
.meta-item { padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; background: rgba(var(--cream-rgb), .62); }
.meta-item dt { margin-bottom: 3px; color: var(--ink-soft); font-size: .72rem; font-weight: 700; }
.meta-item dd { margin: 0; color: var(--wood-dark); font-weight: 800; }

.tabs { display: flex; gap: 6px; padding: 10px clamp(16px, 4vw, 34px) 0; border-bottom: 1px solid var(--line); background: var(--cream); overflow-x: auto; }
.tab-button {
  min-width: 94px;
  min-height: 46px;
  padding: 8px 15px;
  border: 0;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  color: var(--ink-soft);
  background: transparent;
  font-weight: 800;
}
.tab-button[aria-selected='true'] { border-color: var(--teal); color: var(--teal); }
.tab-panel { padding: clamp(22px, 4vw, 38px); }

.content-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: 26px; }
.content-list { margin: 0; padding-right: 20px; color: var(--ink-soft); }
.content-list li { margin-bottom: 8px; }
.source-card { padding: 18px; border-radius: 14px; background: var(--paper); }
.source-card p:last-child { margin-bottom: 0; }

.note-strip { display: flex; width: 100%; max-width: 100%; gap: 7px; margin: 18px 0; padding: 0; overflow-x: auto; list-style: none; scrollbar-width: thin; }
.note-chip {
  position: relative;
  display: flex;
  min-width: 68px;
  min-height: 76px;
  flex: 1 0 68px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 8px;
  border: 1px solid var(--line);
  border-radius: 13px;
  color: var(--wood-dark);
  background: var(--cream);
  font-weight: 800;
  text-align: center;
}
.note-chip.is-shared { color: var(--gray-light); background: var(--surface-hover); }
.note-chip.is-delta { border: 2px solid var(--crimson); color: var(--crimson); background: var(--crimson-soft); }
.delta-label { display: block; margin-top: 5px; font-size: .6rem; line-height: 1.25; }

.compare-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.comparison-link { display: block; padding: 18px; border: 1px solid var(--line); border-radius: 15px; color: var(--ink); background: var(--cream); text-decoration: none; }
.comparison-link:hover { border-color: var(--teal); color: var(--ink); }

.lab-switcher { display: inline-flex; gap: 5px; margin-bottom: 22px; padding: 5px; border: 1px solid var(--line); border-radius: 15px; background: rgba(var(--cream-rgb), .7); }
.lab-switcher .tab-button { min-width: 150px; border: 0; border-radius: 10px; }
.lab-switcher .tab-button[aria-selected='true'] { color: var(--cream); background: var(--wood-dark); }

.lab-surface { padding: clamp(20px, 4vw, 36px); }
.selector-row { display: grid; grid-template-columns: 1fr auto 1fr; gap: 13px; align-items: end; }
.field { display: grid; gap: 7px; }
.field label { color: var(--ink-soft); font-size: .82rem; font-weight: 800; }
.field select,
.field input[type='file'] { width: 100%; padding: 9px 12px; border: 1px solid var(--line-strong); border-radius: 12px; color: var(--ink); background: var(--cream); }
.versus { display: grid; width: 44px; height: 44px; place-items: center; border-radius: 50%; color: var(--crimson); background: var(--crimson-soft); font-weight: 800; }

#comparison-content,
#transposition-content { min-width: 0; }
.ab-grid { display: grid; min-width: 0; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 22px; }
.ab-card { min-width: 0; padding: 20px; border: 1px solid var(--line); border-radius: 17px; background: rgba(var(--cream-rgb), .72); }
.ab-label { display: inline-grid; width: 32px; height: 32px; margin-bottom: 9px; place-items: center; border-radius: 50%; color: var(--cream); background: var(--teal); font-weight: 800; }
.ab-card:nth-child(2) .ab-label { background: var(--crimson); }
.ab-card .button { width: 100%; }

.difference-callout { margin-top: 18px; padding: 18px; border-right: 4px solid var(--crimson); border-radius: 12px; background: var(--danger-surface); }
.difference-callout p:last-child { margin-bottom: 0; }

.quiz-box { margin-top: 22px; padding: 22px; border: 1px dashed var(--line-strong); border-radius: 17px; background: var(--paper); }
.quiz-options { display: flex; flex-wrap: wrap; gap: 9px; }
.quiz-options button { min-width: 120px; }
.live-status { min-height: 28px; margin: 12px 0 0; color: var(--ink-soft); font-weight: 700; }
.live-status[data-tone='success'] { color: var(--green); }
.live-status[data-tone='danger'] { color: var(--crimson); }

.root-switcher { display: flex; flex-wrap: wrap; gap: 8px; margin-block: 20px; }
.root-button { min-width: 88px; min-height: 45px; padding: 8px 15px; border: 1px solid var(--line-strong); border-radius: 99px; cursor: pointer; background: var(--cream); font-weight: 800; }
.root-button[aria-pressed='true'] { border-color: var(--teal); color: var(--cream); background: var(--teal); }

.hand-map { display: grid; gap: 8px; padding: 20px; border: 1px solid var(--line); border-radius: 17px; background: var(--byan-dark); box-shadow: inset 0 7px 20px rgba(var(--shadow-rgb), .16); }
.string-row { display: grid; grid-template-columns: 76px repeat(4, minmax(58px, 1fr)); gap: 6px; align-items: center; }
.string-name { color: var(--brass-light); font-size: .76rem; font-weight: 700; }
.finger-position { display: grid; min-height: 48px; place-items: center; border: 1px solid rgba(var(--cream-rgb), .18); border-radius: 8px; color: rgba(var(--cream-rgb),.54); background: rgba(var(--cream-rgb),.05); font-size: .75rem; }
.finger-position.is-note { border-color: var(--brass-light); color: var(--wood-dark); background: var(--brass-light); font-weight: 800; }

.self-check { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-top: 20px; padding: 17px; border-radius: 14px; background: var(--teal-soft); }
.self-check p { margin: 0; color: var(--art-lapis-light); }

.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 13px; }
.stat-card { padding: 20px; border: 1px solid var(--line); border-radius: 17px; background: rgba(var(--cream-rgb), .72); }
.stat-value { display: block; margin-bottom: 3px; color: var(--wood-dark); font-family: var(--font-ui); font-size: 2rem; font-weight: 700; line-height: 1.2; }
.stat-label { color: var(--ink-soft); font-size: .82rem; font-weight: 700; }

.curriculum-list { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.curriculum-item { display: grid; grid-template-columns: 42px 1fr auto; gap: 12px; align-items: center; padding: 13px; border: 1px solid var(--line); border-radius: 14px; background: var(--cream); }
.curriculum-order { display: grid; width: 36px; height: 36px; place-items: center; border-radius: 50%; color: var(--ink-soft); background: var(--paper-deep); font-weight: 800; }
.curriculum-item.is-seen .curriculum-order { color: var(--cream); background: var(--green); }
.curriculum-item strong { display: block; color: var(--wood-dark); }
.curriculum-item small { color: var(--ink-soft); }
.metric-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(135px,1fr));gap:9px;margin:12px 0}.metric-grid>div{display:grid;gap:4px;padding:10px;border:1px solid var(--line);border-radius:12px;background:var(--paper)}.metric-grid span{color:var(--ink-soft)}

.timeline { position: relative; display: grid; gap: 2px; margin: 0; padding: 0; list-style: none; }
.timeline::before { position: absolute; top: 18px; right: 17px; bottom: 18px; width: 1px; content: ''; background: var(--line-strong); }
.timeline-item { position: relative; display: grid; grid-template-columns: 36px 1fr; gap: 13px; padding: 11px 0; }
.timeline-mark { z-index: 1; display: grid; width: 35px; height: 35px; place-items: center; border: 4px solid var(--paper); border-radius: 50%; color: var(--teal); background: var(--teal-soft); font-size: .72rem; font-weight: 800; }
.timeline-copy strong { display: block; color: var(--wood-dark); }
.timeline-copy time { color: var(--ink-soft); font-size: .75rem; }

.progress-layout { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); gap: 20px; align-items: start; }
.progress-column { display: grid; gap: 20px; }
.card, .data-panel { padding: clamp(20px, 3vw, 30px); }
.rhythm-profile-card { overflow: hidden; }
.rhythm-profile-card .section-head { align-items: start; }
.rhythm-profile-grid { display: grid; grid-template-columns: 144px minmax(0, 1fr); gap: clamp(18px, 3vw, 30px); align-items: center; }
.rhythm-score {
  display: grid;
  width: 144px;
  height: 144px;
  place-content: center;
  border: 7px solid rgba(var(--gold-light-rgb), .75);
  border-radius: 50%;
  color: var(--cream);
  background: var(--wood-dark);
  box-shadow: inset 0 0 0 1px rgba(var(--cream-rgb), .15), 0 10px 28px rgba(var(--shadow-rgb), .16);
  text-align: center;
}
.rhythm-score strong { display: block; font-family: var(--font-ui); font-size: 2.7rem; line-height: 1; }
.rhythm-score span { margin-top: 4px; color: rgba(var(--cream-rgb), .72); font-size: .72rem; font-weight: 700; }
.rhythm-result-copy h3 { margin: 2px 0 10px; color: var(--teal); font-size: 1.55rem; }
.rhythm-trend { margin: 0 0 12px; padding: 10px 12px; border-radius: 11px; color: var(--ink-soft); background: var(--paper); font-size: .84rem; }
.rhythm-trend[data-trend='improving'] { color: var(--success-text); background: var(--green-soft); }
.rhythm-trend[data-trend='declining'] { color: var(--danger-text); background: var(--crimson-soft); }
.rhythm-guidance { display: grid; gap: 2px; padding: 13px 15px; border-right: 4px solid var(--brass); border-radius: 11px; background: var(--warning-surface); }
.rhythm-guidance strong { color: var(--wood-dark); }
.rhythm-guidance small { color: var(--ink-soft); }
.rhythm-beta-note, .rhythm-retest-note { margin: 10px 0 0; color: var(--ink-soft); font-size: .76rem; }
.rhythm-retest-note[data-due='true'] { width: fit-content; padding: 7px 10px; border-radius: 9px; color: var(--warning-text); background: var(--warning-surface); font-weight: 800; }
.rhythm-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 20px; }
.rhythm-empty { display: flex; align-items: center; justify-content: space-between; gap: 22px; padding: 18px; border: 1px dashed var(--line-strong); border-radius: 15px; background: var(--paper); }
.rhythm-empty p { max-width: 610px; margin: 0; color: var(--ink-soft); }
.rhythm-empty .button { flex: 0 0 auto; }
.data-panel { position: sticky; top: 96px; }
.privacy-note { display: flex; gap: 12px; padding: 14px; border-radius: 13px; background: var(--green-soft); color: var(--success-text); font-size: .84rem; }
.privacy-mark { font-size: 1.15rem; }
.file-drop { display: grid; gap: 10px; margin-block: 18px; }
.data-actions { display: grid; gap: 9px; }
.data-actions .button { width: 100%; }

.site-footer {
  padding: 28px 18px 100px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  text-align: center;
  font-size: .78rem;
}

.mobile-nav { display: none; }

@media (max-width: 900px) {
  .desktop-nav { display: none; }
  .header-inner { min-height: 66px; }
  .header-action { margin-inline-start: auto; }
  .brand-copy small { display: none; }
  .hero-grid,
  .progress-layout { grid-template-columns: 1fr; }
  .session-grid { grid-template-columns: 1fr 1fr; }
  .session-card:first-child { grid-column: 1 / -1; min-height: 230px; }
  .explorer-layout { grid-template-columns: 1fr; }
  .family-browser { position: static; max-height: none; }
  .family-group:not([open]) .branch-list { display: none; }
  .detail-surface { min-height: auto; }
  .data-panel { position: static; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .ab-grid { grid-template-columns: 1fr; }
  .mobile-nav {
    position: fixed;
    right: 10px;
    bottom: max(10px, env(safe-area-inset-bottom));
    left: 10px;
    z-index: 70;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    padding: 5px;
    border: 1px solid var(--line-strong);
    border-radius: 18px;
    background: rgba(var(--byan-dark-rgb), .96);
    box-shadow: 0 16px 45px rgba(var(--shadow-rgb), .22);
    backdrop-filter: blur(18px);
  }
  .mobile-nav .nav-link { min-width: 0; flex-direction: column; gap: 1px; padding: 5px 2px; border-radius: 13px; font-size: .72rem; line-height: 1.25; }
  .mobile-nav .nav-link.is-active::after { display: none; }
  .mobile-nav .nav-mark { font-size: 1rem; }
}

@media (max-width: 680px) {
  .page-main { width: min(calc(100% - 24px), var(--content)); padding-top: 25px; }
  .header-inner { width: min(calc(100% - 24px), var(--content)); }
  .header-action { width: 44px; padding-inline: 0; font-size: 0; }
  .header-action::before { content: 'ض'; font-size: .9rem; }
  .hero-copy { padding: 29px 23px 34px; }
  .hero-aside { padding: 21px; }
  .session-grid,
  .quick-tools,
  .compare-cards,
  .ab-grid,
  .choice-grid,
  .choice-grid.level-grid,
  .content-grid { grid-template-columns: 1fr; }
  .session-card:first-child { grid-column: auto; }
  .session-card { min-height: 255px; }
  .section-head { align-items: start; flex-direction: column; }
  .dialog-actions { flex-direction: column-reverse; }
  .dialog-actions .button { width: 100%; }
  .check-grid { grid-template-columns: 1fr; }
  .meta-grid { grid-template-columns: 1fr 1fr; }
  .detail-title-row { flex-direction: column; }
  .tabs { padding-inline: 10px; }
  .tab-button { min-width: 88px; }
  .tab-panel { padding-inline: 18px; }
  .lab-switcher { display: grid; grid-template-columns: 1fr 1fr; width: 100%; }
  .lab-switcher .tab-button { min-width: 0; }
  .selector-row { grid-template-columns: 1fr; }
  .versus { margin-inline: auto; }
  .self-check { align-items: stretch; flex-direction: column; }
  .self-check .button { width: 100%; }
  .rhythm-profile-grid { grid-template-columns: 112px minmax(0, 1fr); }
  .rhythm-score { width: 112px; height: 112px; border-width: 5px; }
  .rhythm-score strong { font-size: 2.15rem; }
  .rhythm-empty { align-items: stretch; flex-direction: column; }
  .rhythm-empty .button { width: 100%; }
  .string-row { grid-template-columns: 58px repeat(4, minmax(50px, 1fr)); min-width: 355px; }
  .hand-map { overflow-x: auto; padding: 14px; }
  .curriculum-item { grid-template-columns: 38px 1fr; }
  .curriculum-item .status-badge { grid-column: 2; }
}

@media (max-width: 420px) {
  .brand-mark { width: 39px; height: 39px; }
  .brand-copy strong { font-size: .92rem; }
  .meta-grid,
  .stats-grid { grid-template-columns: 1fr; }
  .tool-card { align-items: start; }
  .rhythm-profile-grid { grid-template-columns: 1fr; }
  .rhythm-score { width: 112px; height: 112px; }
  .rhythm-actions .button { width: 100%; }
  .note-chip { min-width: 61px; flex-basis: 61px; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

@media print {
  .site-header,
  .mobile-nav,
  .button,
  .data-panel { display: none !important; }
  body { background: var(--cream); }
  .page-main { width: 100%; padding: 0; }
  .card, .detail-surface { box-shadow: none; }
}
/* ===== Byan Art identity v1 ===== */
html { color-scheme: dark; }

body {
  color: var(--ink);
  background:
    radial-gradient(circle at 92% 0%, rgba(var(--gold-rgb), .13), transparent 32rem),
    radial-gradient(circle at 4% 36%, rgba(var(--art-lapis-rgb), .18), transparent 28rem),
    linear-gradient(160deg, var(--byan-dark) 0%, var(--paper) 48%, var(--art-lapis-dark) 150%);
  font-family: var(--font-ui);
}

body::before {
  opacity: .42;
  background-image:
    radial-gradient(circle at 18% 18%, transparent 0 74px, rgba(var(--art-lapis-light-rgb), .045) 75px 76px, transparent 77px 104px, rgba(var(--art-lapis-light-rgb), .03) 105px 106px, transparent 107px),
    repeating-linear-gradient(105deg, transparent 0 18px, rgba(var(--cream-rgb), .018) 19px 20px);
}

a:hover { color: var(--byan-gold-light); }
.skip-link { color: var(--cream); background: var(--art-lapis); }
.site-header { border-color: var(--line); background: rgba(var(--byan-dark-rgb), .92); }
.brand { color: var(--cream); }
.brand-mark {
  display: block;
  width: 43px;
  height: 43px;
  flex: 0 0 auto;
  border: 0;
  border-radius: 0;
  color: inherit;
  background: transparent;
  box-shadow: none;
}
.brand-copy { display: grid; gap: 1px; line-height: 1.1; }
.brand-lockup { display: flex; align-items: start; gap: 6px; width: fit-content; }
.brand-lockup strong { font-family: var(--font-logo); font-size: 1.52rem; font-weight: 700; line-height: .95; }
.brand-art { color: var(--art-lapis-light); font-size: .57rem; font-weight: 700; letter-spacing: .18em; }
.brand-copy small { color: var(--gray-light); font-size: .7rem; }
.nav-link:hover { color: var(--cream); background: var(--surface-hover); }
.nav-link.is-active { color: var(--cream); background: var(--info-surface); }
.nav-mark { color: var(--byan-gold); }
.header-action { color: var(--cream); background: rgba(var(--cream-rgb), .035); }
.header-action:hover { border-color: var(--art-lapis-light); color: var(--cream); background: var(--info-surface); }

h1,
h2,
h3 { color: var(--cream); font-family: var(--font-ui); }
.eyebrow { color: var(--byan-gold); }
.lede,
.section-head p,
.session-card p,
.recommendation-reason { color: var(--gray-light); }

.hero-copy {
  color: var(--cream);
  background: linear-gradient(145deg, var(--byan-mid), var(--art-lapis-dark));
}
.hero-copy::after {
  border-color: rgba(var(--art-lapis-light-rgb), .42);
  box-shadow: 0 0 0 28px rgba(var(--art-lapis-light-rgb), .07), 0 0 0 55px rgba(var(--art-lapis-light-rgb), .04);
}
.hero-copy h1 { color: var(--cream); }
.hero-copy .eyebrow { color: var(--byan-gold-light); }
.hero-copy .lede { color: rgba(var(--cream-rgb), .78); }

.hero-panel,
.card,
.session-card,
.detail-surface,
.lab-surface,
.data-panel,
.family-browser,
.stat-card,
.ab-card,
.tool-card {
  border-color: var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.date-pill { color: var(--art-lapis-light); background: var(--info-surface); }
.button-primary { color: var(--cream); background: var(--art-lapis); box-shadow: 0 8px 20px rgba(var(--art-lapis-rgb), .25); }
.button-primary:hover { color: var(--cream); background: var(--art-lapis-dark); }
.button-brass { color: var(--byan-dark); background: linear-gradient(135deg, var(--byan-gold-light), var(--byan-gold)); }
.button-brass:hover { color: var(--byan-dark); }
.button-secondary { border-color: var(--line-strong); color: var(--cream); background: rgba(var(--cream-rgb), .055); }
.button-secondary:hover { color: var(--cream); background: var(--surface-hover); }
.button-quiet { color: var(--art-lapis-light); }
.button-danger { border-color: rgba(var(--danger-rgb), .42); color: var(--danger-text); background: var(--danger-surface); }

.session-card::before { background: var(--session-color, var(--byan-gold)); }
.session-card:nth-child(2) { --session-color: var(--art-lapis-light); }
.session-card:nth-child(3) { --session-color: var(--danger-text); }
.session-order { color: var(--cream); background: var(--surface-lapis); }
.progress-line { background: rgba(var(--cream-2-rgb), .13); }
.progress-line > span { background: var(--art-lapis-light); }
.tool-card:hover { color: var(--cream); border-color: var(--art-lapis-light); background: var(--surface-raised); }
.tool-mark { color: var(--byan-dark); background: var(--byan-gold-light); }
.tool-card:nth-child(2) .tool-mark { color: var(--cream); background: var(--art-lapis); }
.tool-copy strong { color: var(--cream); font-family: var(--font-ui); }
.tool-copy span { color: var(--gray-light); }
.tool-copy .tool-status { color: var(--art-lapis-light); }

.notice { border-color: rgba(var(--gold-rgb), .34); color: var(--warning-text); background: var(--warning-surface); }
.notice[data-tone='success'] { border-color: rgba(var(--success-rgb), .42); color: var(--success-text); background: var(--success-surface); }
.notice[data-tone='danger'] { border-color: rgba(var(--danger-rgb), .42); color: var(--danger-text); background: var(--danger-surface); }

dialog.onboarding-dialog { color: var(--ink); background: var(--surface-solid); }
dialog.onboarding-dialog::backdrop { background: rgba(var(--shadow-rgb), .72); }
.choice-card label,
.family-group[open],
.tabs,
.note-chip,
.comparison-link,
.root-button,
.curriculum-item {
  color: var(--cream);
  background: var(--surface-raised);
}
.choice-card label strong,
.family-group summary,
.branch-button.is-active,
.meta-item dd,
.note-chip,
.field select,
.field input[type='file'],
.stat-value,
.curriculum-item strong,
.timeline-copy strong,
.rhythm-guidance strong { color: var(--cream); }
.choice-card input:checked + label { border-color: var(--art-lapis-light); background: var(--info-surface); }
.known-maqams,
.source-card,
.quiz-box,
.rhythm-trend,
.rhythm-empty,
.metric-grid > div { background: var(--paper-deep); }

.family-group { background: rgba(var(--cream-rgb), .035); }
.family-group[open] { border-color: var(--family-color, var(--byan-gold)); }
.branch-button:hover,
.branch-button.is-active { background: var(--surface-hover); }
.status-badge,
.mini-badge { background: rgba(var(--cream-rgb), .045); }
.status-badge.is-practice,
.status-badge.progress-mastered { color: var(--success-text); background: var(--success-surface); }
.status-badge.is-soon,
.status-badge.progress-heard,
.status-badge.progress-practiced,
.status-badge.progress-jins { color: var(--warning-text); background: var(--warning-surface); }
.status-badge.progress-up,
.status-badge.progress-down { color: var(--art-lapis-light); background: var(--info-surface); }

.detail-cover { background: linear-gradient(135deg, var(--surface-raised), var(--surface-lapis)); }
.meta-item,
.ab-card,
.stat-card { background: rgba(var(--cream-rgb), .045); }
.tabs { background: rgba(var(--byan-dark-rgb), .45); }
.note-chip.is-shared { color: var(--gray-light); background: rgba(var(--cream-rgb), .04); }
.note-chip.is-delta { color: var(--danger-text); background: var(--danger-surface); }
.comparison-link:hover { color: var(--cream); border-color: var(--art-lapis-light); }
.lab-switcher { background: rgba(var(--cream-rgb), .04); }
.lab-switcher .tab-button[aria-selected='true'] { color: var(--cream); background: var(--art-lapis); }
.field select,
.field input[type='file'] { background: var(--paper-deep); }
.versus { color: var(--danger-text); background: var(--danger-surface); }
.difference-callout { background: var(--danger-surface); }
.root-button[aria-pressed='true'] { border-color: var(--art-lapis-light); color: var(--cream); background: var(--art-lapis); }
.hand-map {
  background:
    repeating-linear-gradient(90deg, rgba(var(--gold-rgb), .035) 0 1px, transparent 1px 26px),
    var(--byan-dark);
}
.string-name { color: var(--byan-gold-light); }
.finger-position { border-color: rgba(var(--cream-rgb), .18); color: rgba(var(--cream-rgb), .56); background: rgba(var(--cream-rgb), .05); }
.finger-position.is-note { border-color: var(--byan-gold-light); color: var(--byan-dark); background: var(--byan-gold-light); }
.self-check { background: var(--info-surface); }
.self-check p { color: var(--art-lapis-light); }
.curriculum-item.is-seen .curriculum-order { color: var(--cream); background: var(--success-solid); }
.timeline-mark { border-color: var(--paper); color: var(--art-lapis-light); background: var(--info-surface); }
.rhythm-score { border-color: rgba(var(--gold-light-rgb), .78); color: var(--cream); background: var(--art-lapis-dark); }
.rhythm-score strong,
.stat-value { font-family: var(--font-mono); }
.rhythm-result-copy h3 { color: var(--art-lapis-light); }
.rhythm-trend[data-trend='improving'] { color: var(--success-text); background: var(--success-surface); }
.rhythm-trend[data-trend='declining'] { color: var(--danger-text); background: var(--danger-surface); }
.rhythm-guidance,
.rhythm-retest-note[data-due='true'] { color: var(--warning-text); background: var(--warning-surface); }
.privacy-note { color: var(--success-text); background: var(--success-surface); }
.site-footer { border-color: var(--line); color: var(--gray-light); }

@media (max-width: 900px) {
  .mobile-nav { border-color: var(--line); background: rgba(var(--byan-dark-rgb), .96); }
}

@media print {
  html { color-scheme: light; }
  body {
    --ink: var(--print-ink);
    --ink-soft: var(--print-muted);
    --wood: var(--print-muted);
    --wood-deep: var(--print-ink);
    --surface: var(--print-surface);
    --surface-solid: var(--print-surface);
    --surface-raised: var(--print-surface);
    --paper: var(--print-background);
    --paper-deep: var(--cream-2);
    color: var(--print-ink);
    background: var(--print-background);
  }
}


html { color-scheme: dark; }
.hand-map-empty { color: var(--cream); }
.data-actions-spaced { margin-top: 18px; }