:root {
  color-scheme: light;
  --bg: #f7f5ef;
  --surface: #fffdf8;
  --surface-strong: #ffffff;
  --ink: #171717;
  --muted: #6e6961;
  --line: #ded8ca;
  --accent: #0f766e;
  --accent-dark: #134e4a;
  --accent-soft: #e4f3ef;
  --danger: #b64949;
  --danger-soft: #fff0ed;
  --success: #247448;
  --success-soft: #eaf6ec;
  --shadow: 0 18px 48px rgba(29, 28, 24, 0.08);
}

* { box-sizing: border-box; }

html { min-width: 320px; background: var(--bg); }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

button, input { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

.app-shell {
  width: min(100% - 24px, 820px);
  min-height: 100svh;
  margin: 0 auto;
  padding: max(18px, env(safe-area-inset-top)) 0 max(24px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
}

.site-header, .site-footer, .practice-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-header { padding: 4px 2px 20px; }
.home-link { color: var(--ink); font-weight: 780; letter-spacing: -0.03em; text-decoration: none; }
.header-label, .site-footer, .practice-footer { color: var(--muted); font-size: 0.79rem; }
.site-footer { margin-top: auto; padding: 24px 2px 2px; }
.site-footer a { color: var(--muted); }

.panel {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.setup-panel, .summary-panel { padding: clamp(24px, 6vw, 48px); }
.practice-panel { padding: clamp(18px, 4vw, 32px); }
.is-hidden { display: none !important; }

.eyebrow {
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1 { margin: 8px 0 12px; font-size: clamp(2.1rem, 8vw, 4.25rem); line-height: 0.98; letter-spacing: -0.06em; }
.lede { max-width: 52ch; margin: 0; color: var(--muted); font-size: clamp(1rem, 2.4vw, 1.12rem); }

form { margin-top: 32px; }
.setup-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
legend { margin-bottom: 9px; font-size: 0.85rem; font-weight: 760; }
.legend-note { color: var(--muted); font-weight: 500; }
.choice-grid { display: grid; gap: 9px; }
.two-up { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.choice-card, .toggle-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 68px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-strong);
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease, box-shadow 140ms ease;
}
.choice-card:has(input:checked), .toggle-card:has(input:checked) { border-color: rgba(15, 118, 110, 0.72); background: var(--accent-soft); box-shadow: inset 0 0 0 1px rgba(15, 118, 110, 0.18); }
.choice-card input, .toggle-card input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.choice-card::before, .toggle-card::before { content: ""; flex: 0 0 17px; width: 17px; height: 17px; border: 1.5px solid #aaa398; border-radius: 50%; background: #fff; }
.toggle-card::before { border-radius: 5px; }
.choice-card:has(input:checked)::before, .toggle-card:has(input:checked)::before { border-color: var(--accent); background: var(--accent); box-shadow: inset 0 0 0 4px var(--surface-strong); }
.toggle-card:has(input:checked)::before { box-shadow: inset 0 0 0 3px var(--surface-strong); }
.choice-card strong, .toggle-card strong { display: block; font-size: 0.9rem; }
.choice-card small, .toggle-card small { display: block; color: var(--muted); font-size: 0.73rem; }

.marks-fieldset { margin-top: 22px; }
.mark-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
.toggle-card { min-height: 74px; }
.mark-symbol { width: 30px; color: var(--accent-dark); font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif; font-size: 1.7rem; line-height: 1; text-align: center; }
.setup-footer { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 30px; }
.session-count { margin: 0; color: var(--muted); font-size: 0.85rem; }

.button {
  min-height: 44px;
  padding: 10px 15px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-weight: 760;
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease, border-color 140ms ease;
}
.button:hover, .button:focus-visible { transform: translateY(-1px); outline: none; }
.button:focus-visible, .text-button:focus-visible { box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.22); outline: none; }
.button-primary { border-color: var(--accent); background: var(--accent); color: #fff; box-shadow: 0 7px 16px rgba(15, 118, 110, 0.18); }
.button-primary:hover { background: var(--accent-dark); }
.button-secondary { border-color: var(--line); background: var(--surface-strong); color: var(--ink); }
.button-secondary:hover { border-color: rgba(15, 118, 110, 0.52); }
.button-quiet { border-color: transparent; background: transparent; color: var(--muted); }

.practice-header { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; margin: 3px 2px 22px; }
.practice-header h1 { margin: 5px 0 5px; font-size: clamp(3.8rem, 18vw, 7rem); }
.instruction { margin: 0; color: var(--muted); }
.progress-block { min-width: 106px; padding-bottom: 6px; color: var(--muted); font-size: 0.8rem; text-align: right; }
progress { display: block; width: 106px; height: 7px; margin-top: 7px; accent-color: var(--accent); }

.drawing-card { max-width: 560px; margin: 0 auto; }
.drawing-stage { position: relative; width: 100%; aspect-ratio: 1; overflow: hidden; border: 1px solid var(--line); border-radius: 15px; background: #fffefa; box-shadow: inset 0 0 0 1px rgba(255,255,255,0.72); }
.guide-grid, #drawing-canvas, .hint-svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.guide-grid { opacity: 0.55; background: linear-gradient(90deg, transparent calc(50% - 0.5px), #e8e3d9 50%, transparent calc(50% + 0.5px)), linear-gradient(0deg, transparent calc(50% - 0.5px), #e8e3d9 50%, transparent calc(50% + 0.5px)); pointer-events: none; }
.guide-grid::before, .guide-grid::after { content: ""; position: absolute; background: #eee9df; }
.guide-grid::before { top: 0; bottom: 0; left: 25%; width: 1px; box-shadow: calc(50vw - 50%) 0 0 #eee9df; }
.guide-grid::after { left: 0; right: 0; top: 25%; height: 1px; box-shadow: 0 calc(50vw - 50%) 0 #eee9df; }
#drawing-canvas { z-index: 2; touch-action: none; cursor: crosshair; }
.hint-svg { z-index: 3; overflow: visible; pointer-events: none; opacity: 0; transition: opacity 160ms ease; }
.hint-svg.is-visible { opacity: 1; }
.hint-svg path { fill: none; stroke: var(--accent); stroke-width: 4.4; stroke-linecap: round; stroke-linejoin: round; opacity: 0.56; }
.hint-svg .hint-path { stroke-dasharray: var(--path-length); stroke-dashoffset: var(--path-length); animation: draw-hint 580ms ease forwards; animation-delay: var(--path-delay); }
.hint-svg .hint-number { fill: var(--accent-dark); font-size: 6px; font-weight: 800; }
.stage-label { position: absolute; z-index: 1; right: 11px; bottom: 8px; color: #bcb5aa; font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; pointer-events: none; }
@keyframes draw-hint { to { stroke-dashoffset: 0; } }

.stroke-meter { display: flex; justify-content: space-between; padding: 9px 3px 0; color: var(--muted); font-size: 0.8rem; }
.feedback { margin-top: 14px; padding: 13px 15px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface-strong); }
.feedback.success { border-color: #b7dabe; background: var(--success-soft); }
.feedback.failure { border-color: #edc7bd; background: var(--danger-soft); }
.feedback-heading { display: flex; justify-content: space-between; gap: 12px; }
.feedback-score { color: var(--accent-dark); font-weight: 800; }
.feedback p { margin: 4px 0 0; font-size: 0.85rem; }
.feedback-detail { color: var(--muted); }
.drawing-controls { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.drawing-controls .button-primary { margin-left: auto; }
.practice-footer { margin: 18px 2px 0; }
.text-button { min-height: 40px; padding: 5px 0; border: 0; background: transparent; color: var(--muted); cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }

.summary-panel { text-align: center; }
.summary-panel .lede { margin: 0 auto; }
.summary-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; max-width: 460px; margin: 28px auto 0; }
.summary-stats div { padding: 14px 8px; border: 1px solid var(--line); border-radius: 11px; background: var(--surface-strong); }
.summary-stats strong, .summary-stats span { display: block; }
.summary-stats strong { color: var(--accent-dark); font-size: 1.7rem; line-height: 1; }
.summary-stats span { margin-top: 5px; color: var(--muted); font-size: 0.78rem; }
.summary-missed { min-height: 1.5em; margin: 18px auto 0; color: var(--muted); font-size: 0.87rem; }
.summary-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 9px; margin-top: 24px; }

@media (max-width: 620px) {
  .setup-grid { grid-template-columns: 1fr; gap: 20px; }
  .practice-header { align-items: flex-start; }
  .progress-block { padding-top: 7px; }
  .drawing-controls .button-primary { margin-left: 0; }
  .site-footer { align-items: flex-start; flex-direction: column; gap: 4px; }
}

@media (max-width: 420px) {
  .app-shell { width: min(100% - 16px, 820px); }
  .setup-panel, .summary-panel { padding: 22px 18px; }
  .practice-panel { padding: 14px 10px 20px; }
  .choice-card, .toggle-card { padding: 10px; }
  .practice-header { margin-left: 1px; margin-right: 1px; }
  .practice-header h1 { font-size: 4.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}