/* Public pages: home and legal/help. */
.public-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--auth-header);
  padding: 0 var(--space-10);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  border-bottom: 1px solid var(--color-line);
  background: var(--color-surface-glass);
}
.public-brand .brand-logo { font-size: 21px; }
.public-nav { display: flex; align-items: center; gap: 20px; font-size: var(--font-control); color: var(--color-text-secondary); }
.public-nav > a:not(.btn):hover { color: var(--color-text); }

/* home */
.public-page { background-color: var(--color-bg); background-image: var(--page-texture); background-size: var(--page-texture-size); }
.home { width: min(1200px, calc(100% - 48px)); margin: 0 auto; padding-bottom: var(--space-10); }
.home-hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 72px; align-items: center; padding: 88px 0 64px; }
.home-badge { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-label); font-size: max(var(--label-size), var(--cjk-min, 0px)); letter-spacing: var(--label-tracking); text-transform: var(--label-transform); color: var(--color-text-muted); }
.home-badge svg { width: 13px; height: 13px; color: var(--color-primary); }
.home-hero h1 { margin: 22px 0 14px; font-size: clamp(34px, 4.2vw, 52px); line-height: 1.12; font-weight: 300; letter-spacing: -.035em; }
.home-hero p { margin: 0 0 var(--space-6); color: var(--color-text-muted); font-size: 16px; line-height: 1.75; }
.home-hero .home-lead { margin-bottom: var(--space-3); color: var(--color-text-secondary); font-size: 18px; font-weight: 300; }
.home-actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.home-actions .btn { height: 40px; padding: 0 18px; }
.home-points { display: flex; flex-wrap: wrap; gap: var(--space-5); margin: var(--space-6) 0 0; padding: 0; list-style: none; font-family: var(--font-mono); color: var(--color-text-muted); font-size: max(11px, var(--cjk-min, 0px)); }
.home-points li { display: inline-flex; align-items: center; gap: 6px; }
.home-points svg { width: 13px; height: 13px; color: var(--color-primary); }

/* hero preview: a framed instrument readout */
.home-preview { display: grid; gap: 22px; padding: 26px 28px; border-radius: var(--radius-panel); background: var(--color-surface); box-shadow: var(--shadow-raised); }
.preview-head, .preview-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.preview-head .label:first-child { display: inline-flex; align-items: center; gap: 8px; }
.preview-foot .mono { font-size: max(10.5px, var(--cjk-min, 0px)); color: var(--color-text-muted); }
.preview-body { display: grid; grid-template-columns: 168px minmax(0, 1fr); gap: 28px; align-items: center; }
.preview-dial { position: relative; width: 168px; height: 168px; display: grid; place-items: center; }
.preview-dial > span { position: relative; display: grid; justify-items: center; line-height: 1; }
.preview-dial b { font-size: 52px; font-weight: var(--weight-display); letter-spacing: -.05em; }
.preview-dial small { font-family: var(--font-mono); font-size: max(11px, var(--cjk-min, 0px)); color: var(--color-text-faint); margin-top: 4px; }
.score-dial { position: absolute; inset: 0; width: 100%; height: 100%; }
.score-dial path { stroke-width: 1.4; stroke-linecap: round; }
.score-dial path.on { stroke: var(--color-primary-line); }
.score-dial path.on.major { stroke: var(--color-primary); }
.score-dial path.off { stroke: var(--color-line-input); }
.score-dial path.off.major { stroke: var(--color-line-input-hover); }
.dial-knob { fill: var(--color-primary); filter: var(--effect-glow); }
.preview-bars { display: grid; gap: 16px; }
.preview-bars > span { display: grid; grid-template-columns: 72px minmax(0, 1fr) 24px; align-items: center; gap: 14px; }
.preview-bars em { font-style: normal; }
.preview-bars i { height: 1px; background: var(--color-line-input); }
.preview-bars s { display: block; height: 2px; margin-top: -.5px; border-radius: 1px; background: var(--color-primary); text-decoration: none; }
.preview-bars .w-89 { width: 89%; } .preview-bars .w-70 { width: 70%; } .preview-bars .w-83 { width: 83%; }
.preview-bars b { font-size: max(11px, var(--cjk-min, 0px)); font-weight: var(--weight-regular); text-align: right; }
.preview-sentence { margin: 0; padding-top: 18px; border-top: 1px solid var(--color-line-soft); font-size: 19px; font-weight: 300; line-height: 1.6; color: var(--color-text-secondary); }
.preview-sentence b { color: var(--color-text); font-weight: 500; }
.preview-sentence span { color: var(--color-primary); font-family: var(--font-mono); font-size: 15px; }
.preview-trace { display: block; width: 100%; height: 48px; overflow: visible; }
.preview-trace .trace-axis { stroke: var(--color-line); stroke-width: 1; vector-effect: non-scaling-stroke; }
.preview-trace .trace-base { fill: none; stroke: var(--color-line-input-hover); stroke-width: 1; opacity: .55; vector-effect: non-scaling-stroke; }
.preview-trace .trace-played { fill: none; stroke: var(--color-primary); stroke-width: 1.2; filter: var(--effect-glow); vector-effect: non-scaling-stroke; }
.preview-trace .trace-head { stroke: var(--color-primary); stroke-width: 1; opacity: .5; vector-effect: non-scaling-stroke; }

/* readouts */
.home-stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; padding: 0; border-radius: var(--radius-panel); background: var(--color-line); box-shadow: 0 0 0 1px var(--color-line); overflow: hidden; }
.home-stats > div { display: grid; gap: 10px; padding: 22px 24px; background: var(--color-surface); }
.home-stats svg { display: none; }
.home-stats b { order: 2; font-size: 34px; font-weight: 300; letter-spacing: -.035em; line-height: 1; }
.home-stats span { order: 1; font-family: var(--font-label); font-size: max(var(--label-size), var(--cjk-min, 0px)); letter-spacing: var(--label-tracking); text-transform: var(--label-transform); color: var(--color-text-muted); }

.home-section { padding: 88px 0 0; }
.home-section-title { margin: 0 0 28px; font-size: 26px; font-weight: 300; letter-spacing: -.025em; }
.home-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1px; border-radius: var(--radius-panel); background: var(--color-line); box-shadow: 0 0 0 1px var(--color-line); overflow: hidden; }
.home-grid > .panel { border-radius: 0; box-shadow: none; }
.home-card { display: grid; grid-template-rows: auto auto 1fr auto; padding: 24px; color: var(--color-text); transition: background var(--duration) var(--ease); }
.home-card:hover, .home-way:hover { background: var(--color-surface-subtle); }
.home-card h3 { margin: 20px 0 8px; font-size: var(--font-lead); font-weight: var(--weight-heading); }
.home-card p { margin: 0 0 var(--space-5); color: var(--color-text-muted); font-size: var(--font-control); line-height: 1.7; }
.home-link { display: inline-flex; align-items: center; gap: 6px; color: var(--color-text-secondary); font-size: var(--font-control); }
.home-link svg { width: 13px; height: 13px; transition: transform var(--duration) var(--ease); }
.home-card:hover .home-link { color: var(--color-primary); }
.home-card:hover .home-link svg { transform: translateX(3px); }
.home-ways { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; border-radius: var(--radius-panel); background: var(--color-line); box-shadow: 0 0 0 1px var(--color-line); overflow: hidden; }
.home-ways > .panel { border-radius: 0; box-shadow: none; }
.home-way { display: flex; gap: var(--space-4); padding: 22px; color: var(--color-text); transition: background var(--duration) var(--ease); }
.home-way h3 { margin: 0 0 6px; font-size: var(--font-body); font-weight: var(--weight-heading); }
.home-way p { margin: 0; color: var(--color-text-muted); font-size: var(--font-control); line-height: 1.65; }
.home-modes { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; }
.home-mode { padding: 0; background: transparent; box-shadow: none; }
.home-mode h3 { margin: 0 0 14px; padding-bottom: 12px; display: flex; align-items: center; gap: var(--space-3); border-bottom: 1px solid var(--color-line); font-size: var(--font-body); font-weight: var(--weight-heading); }
.home-mode h3 .icon-tile { width: 28px; height: 28px; }
.home-mode h3 .icon-tile svg { width: 14px; height: 14px; }
.home-mode ul { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; font-size: var(--font-control); }
.home-mode li { display: flex; gap: var(--space-3); color: var(--color-text-secondary); }
.home-mode li b { min-width: 56px; color: var(--color-text); font-family: var(--font-mono); font-size: max(11.5px, var(--cjk-min, 0px)); font-weight: 500; }
.home-faq { width: min(880px, 100%); padding: 0; overflow: hidden; }
.home-faq details + details { border-top: 1px solid var(--color-line-soft); }
.home-faq summary { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); padding: 18px 22px; list-style: none; cursor: pointer; font-size: var(--font-body); }
.home-faq summary::-webkit-details-marker { display: none; }
.home-faq summary svg { width: 15px; height: 15px; flex: none; color: var(--color-text-faint); transition: transform var(--duration) var(--ease); }
.home-faq details[open] summary svg { transform: rotate(180deg); color: var(--color-primary); }
.home-faq p { margin: 0; padding: 0 22px 18px; color: var(--color-text-muted); line-height: 1.75; }
.home-cta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-5); margin-top: 88px; padding: 32px; border-radius: var(--radius-panel); background: var(--color-surface); box-shadow: var(--shadow-raised); }
.home-cta > div:nth-child(2) { flex: 1; min-width: 240px; }
.home-cta h2 { margin: 0 0 6px; font-size: 22px; font-weight: 300; letter-spacing: -.02em; }
.home-cta p { margin: 0; color: var(--color-text-muted); }

.public-footer { margin-top: 88px; padding: 48px max(24px, calc((100% - 1200px) / 2)) 28px; border-top: 1px solid var(--color-line); background: var(--color-surface); }
.public-footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: var(--space-8); }
.public-footer-brand .brand-logo { font-size: 19px; }
.public-footer-brand p { max-width: 320px; margin: var(--space-3) 0 0; color: var(--color-text-muted); font-size: var(--font-control); line-height: 1.7; }
.public-footer h4 { margin: 0 0 var(--space-3); font-family: var(--font-label); font-size: max(var(--label-size), var(--cjk-min, 0px)); letter-spacing: var(--label-tracking); text-transform: var(--label-transform); color: var(--color-text-muted); font-weight: var(--weight-regular); }
.public-footer-grid > div:not(.public-footer-brand) { display: grid; align-content: start; gap: 10px; }
.public-footer a { color: var(--color-text-secondary); font-size: var(--font-control); }
.public-footer a:hover { color: var(--color-text); }
.public-footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-3); margin-top: var(--space-8); padding-top: var(--space-5); border-top: 1px solid var(--color-line-soft); font-family: var(--font-mono); color: var(--color-text-muted); font-size: max(10.5px, var(--cjk-min, 0px)); }

/* legal */
.legal-shell { width: min(1080px, calc(100% - 48px)); margin: 48px auto; display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 40px; align-items: start; }
.legal-nav { position: sticky; top: calc(var(--auth-header) + var(--space-6)); display: grid; gap: 2px; }
.legal-nav a { padding: 8px 10px; border-radius: var(--radius-small); color: var(--color-text-secondary); font-size: var(--font-control); }
.legal-nav a:hover { background: var(--color-line-soft); color: var(--color-text); }
.legal-nav a.active { background: var(--color-surface); color: var(--color-text); box-shadow: 0 0 0 1px var(--color-line); }
.legal-content { padding: 40px 48px; }
.legal-content h1 { margin: 0 0 var(--space-2); font-size: 30px; font-weight: 300; letter-spacing: -.03em; }
.legal-updated { margin: 0 0 var(--space-6); font-family: var(--font-mono); color: var(--color-text-muted); font-size: max(10.5px, var(--cjk-min, 0px)); }
.legal-intro { margin: 0 0 var(--space-6); color: var(--color-text-secondary); line-height: 1.8; }
.legal-content section { counter-increment: legal; padding: 18px 0; border-top: 1px solid var(--color-line-soft); }
.legal-content { counter-reset: legal; }
.legal-content h2 { margin: 0 0 var(--space-2); font-size: var(--font-body); font-weight: var(--weight-heading); }
.legal-content h2::before { content: counter(legal, decimal-leading-zero); margin-right: 12px; font-family: var(--font-mono); font-size: max(10.5px, var(--cjk-min, 0px)); font-weight: var(--weight-regular); color: var(--color-primary); }
.legal-content section p { margin: 0; color: var(--color-text-secondary); line-height: 1.8; }

@media (max-width: 1100px) {
  .home-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .home-ways { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 960px) {
  .home-hero { grid-template-columns: minmax(0, 1fr); padding-top: var(--space-8); gap: 40px; }
  .home-grid, .home-modes, .home-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .public-footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .public-header { padding: 0 var(--space-4); }
  .public-nav > a:not(.btn) { display: none; }
  .public-brand .brand-logo { font-size: 18px; }
  .home, .legal-shell { width: calc(100% - 32px); }
  .home-hero h1 { font-size: 30px; }
  .home-grid, .home-modes, .home-ways, .home-stats, .public-footer-grid { grid-template-columns: minmax(0, 1fr); }
  .home-stats > div { border-right: 0; }
  .home-preview { padding: 20px; }
  .preview-body { grid-template-columns: minmax(0, 1fr); justify-items: center; }
  .preview-bars { width: 100%; }
  .home-cta { padding: var(--space-6); }
  .legal-shell { grid-template-columns: minmax(0, 1fr); }
  .legal-nav { position: static; grid-auto-flow: column; overflow-x: auto; }
  .legal-content { padding: var(--space-6) var(--space-5); }
}

/* ---- no white blocks: content sits on the page, separated by hairlines (controls keep their fill) ---- */
.home-stats { gap: 0 24px; border-radius: 0; background: none; box-shadow: none; overflow: visible; }
.home-stats > div { padding: 22px 0; background: none; border-top: 1px solid var(--color-line); }
.home-grid { gap: 0 24px; border-radius: 0; background: none; box-shadow: none; overflow: visible; }
.home-grid > * { padding: 18px 0; background: none; border-top: 1px solid var(--color-line); }
.home-ways { gap: 0 24px; border-radius: 0; background: none; box-shadow: none; overflow: visible; }
.home-ways > * { padding: 18px 0; background: none; border-top: 1px solid var(--color-line); }
.home-preview { padding: 26px 0 0; border-radius: 0; background: none; box-shadow: none; border-top: 1px solid var(--color-line); }
.home-cta { padding: 32px 0; border-radius: 0; background: none; box-shadow: none; border-top: 1px solid var(--color-line); border-bottom: 1px solid var(--color-line); }
.public-footer { background: none; }