@property --progress {
  syntax: "<angle>";
  inherits: false;
  initial-value: 0deg;
}

:root {
  color: #1a1a1a;
  background: #f5f8fb;
  font-family: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --blue-50: #f0f9ff;
  --blue-100: #d9efff;
  --blue-700: #0066c2;
  --blue-900: #0055ad;
  --blue-1000: #00428c;
  --green-700: #087a52;
  --green-100: #dff7ec;
  --yellow-300: #ffd43d;
  --red-700: #b52b2b;
  --gray-50: #f8f8f8;
  --gray-200: #e6e6e6;
  --gray-420: #949494;
  --gray-536: #767676;
  --gray-900: #1a1a1a;
  --white: #fff;
  --shadow: 0 0.5rem 1.5rem rgb(0 51 102 / 8%);
}

* { box-sizing: border-box; }
html { color-scheme: light; scrollbar-gutter: stable; }
body { min-width: 320px; min-height: 100vh; margin: 0; background: #f5f8fb; font-size: 1.0625rem; line-height: 1.7; letter-spacing: 0.02em; }
button, input { font: inherit; }
a { color: var(--blue-1000); text-underline-offset: 0.2rem; }
:focus-visible { border-radius: 0.25rem; outline: 0.25rem solid #000; outline-offset: 0.125rem; box-shadow: 0 0 0 0.125rem var(--yellow-300); }
.skip-link { position: fixed; z-index: 20; top: 0.5rem; left: 0.5rem; padding: 0.5rem 1rem; color: #fff; background: #000; transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; z-index: 10; top: 0; border-bottom: 1px solid var(--gray-200); background: rgb(255 255 255 / 94%); backdrop-filter: blur(12px); }
.header-inner, .page-shell { width: min(70rem, calc(100% - 3rem)); margin-inline: auto; }
.header-inner { display: flex; min-height: 4.5rem; align-items: center; justify-content: space-between; gap: 1rem; }
.back-link { font-weight: 700; text-decoration: none; }
.page-shell { padding-block: 3rem 5rem; }
.hero { display: grid; align-items: center; grid-template-columns: 1fr auto; gap: 3rem; padding: 2.5rem 3rem; color: var(--white); background: linear-gradient(135deg, var(--blue-1000), #006ebc); border-radius: 1.25rem; box-shadow: var(--shadow); }
.eyebrow, .section-kicker { margin: 0 0 0.25rem; font-size: 0.875rem; font-weight: 700; letter-spacing: 0.08em; }
.eyebrow { color: #d9efff; }
h1 { margin: 0; font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.25; letter-spacing: 0.02em; }
.updated { margin: 1.25rem 0 0; color: #d9efff; font-size: 0.875rem; }
.progress-ring { display: grid; width: 11rem; aspect-ratio: 1; place-items: center; border-radius: 50%; background: conic-gradient(var(--yellow-300) var(--progress), rgb(255 255 255 / 20%) 0); transition: --progress 900ms cubic-bezier(0.2, 0, 0, 1); }
.progress-ring::before { content: ""; grid-area: 1 / 1; width: 8.5rem; aspect-ratio: 1; border-radius: 50%; background: var(--blue-1000); }
.progress-ring__inside { z-index: 1; display: grid; grid-area: 1 / 1; text-align: center; }
.progress-ring__inside strong { font-size: 2rem; line-height: 1.2; }
.progress-ring__inside span { color: #d9efff; font-size: 0.875rem; }
.stats { display: grid; margin-top: 1.5rem; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; }
.stat-card { display: grid; min-height: 8.5rem; align-content: space-between; padding: 1.25rem; background: var(--white); border: 1px solid var(--gray-200); border-radius: 0.75rem; box-shadow: var(--shadow); }
.stat-card--primary { border-color: var(--blue-900); background: var(--blue-50); }
.stat-label { color: var(--gray-536); font-weight: 700; }
.stat-card strong { color: var(--blue-1000); font-size: clamp(1.75rem, 4vw, 2.5rem); line-height: 1.2; }
.stat-card small { font-size: 0.875rem; font-weight: 500; }
.panel { margin-top: 1.5rem; padding: 2rem; background: var(--white); border: 1px solid var(--gray-200); border-radius: 1rem; box-shadow: var(--shadow); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 1.5rem; margin-bottom: 1.5rem; }
.section-heading__side { display: grid; justify-items: end; gap: 0.5rem; }
.section-link { font-size: 0.925rem; font-weight: 700; }
.section-kicker { color: var(--blue-900); }
h2 { margin: 0; font-size: 1.5rem; line-height: 1.4; }
.legend { display: flex; gap: 1rem; color: var(--gray-536); font-size: 0.875rem; }
.legend span { display: inline-flex; align-items: center; gap: 0.35rem; }
.dot { width: 0.7rem; height: 0.7rem; border-radius: 50%; }
.dot--correct { background: var(--green-700); }
.dot--answered { background: #aeb8c2; }
.session-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 2.5rem; }
.session-row { display: grid; min-width: 0; align-items: center; grid-template-columns: 10rem 1fr 3.5rem; gap: 0.75rem; padding: 0.75rem 0.25rem; color: inherit; border-top: 1px solid var(--gray-200); text-decoration: none; }
.session-row:hover { background: var(--blue-50); }
.session-row__label { display: grid; line-height: 1.4; }
.session-row__label strong { font-size: 0.925rem; }
.session-row__track { display: flex; height: 0.65rem; overflow: hidden; background: var(--gray-200); border-radius: 999px; }
.session-row__track span { display: block; width: 0; height: 100%; transition: width 700ms cubic-bezier(0.2, 0, 0, 1); }
.session-row__correct { background: var(--green-700); }
.session-row__wrong { background: #aeb8c2; }
.session-row__value { text-align: right; font-weight: 700; }
.session-row__value small { color: var(--gray-536); font-size: 0.7rem; font-weight: 500; }
.category-list { display: grid; }
.category-row { display: grid; align-items: center; grid-template-columns: minmax(12rem, 1fr) minmax(8rem, 2fr) 3.5rem; gap: 1.25rem; padding-block: 0.9rem; border-top: 1px solid var(--gray-200); }
.category-row > div:first-child { display: grid; }
.category-row span { color: var(--gray-536); font-size: 0.8rem; }
.category-row__meter { height: 0.75rem; overflow: hidden; background: var(--gray-200); border-radius: 999px; }
.category-row__meter span { display: block; width: 0; height: 100%; background: var(--blue-700); transition: width 700ms cubic-bezier(0.2, 0, 0, 1); }
.category-row__rate { text-align: right; color: var(--blue-1000); }
.data-panel { display: flex; align-items: center; justify-content: space-between; gap: 2rem; margin-top: 1.5rem; padding: 2rem; background: var(--green-100); border: 1px solid #78bda2; border-radius: 1rem; }
.data-panel p { max-width: 44rem; margin: 0.5rem 0 0; }
.data-actions { display: flex; flex: 0 0 auto; align-items: center; gap: 1rem; }
.button { min-width: 6rem; min-height: 3rem; padding: 0.75rem 1rem; border: 2px solid var(--blue-1000); border-radius: 0.5rem; font-size: 1rem; font-weight: 700; line-height: 1; letter-spacing: 0.02em; text-decoration: underline; text-decoration-color: transparent; text-underline-offset: 0.2rem; cursor: pointer; }
.button--primary { color: #fff; background: var(--blue-1000); }
.button--secondary { color: var(--blue-1000); background: #fff; }
.text-button { min-height: 3rem; padding: 0.75rem 1rem; color: var(--blue-1000); background: transparent; border: 0; border-radius: 0.5rem; font-size: 1rem; line-height: 1; text-decoration: underline; text-underline-offset: 0.2rem; cursor: pointer; }
@media (hover: hover) {
  .button:hover { text-decoration-color: currentColor; text-decoration-thickness: 0.12rem; }
  .button--primary:hover { color: #fff; background: var(--blue-900); }
  .button--secondary:hover { color: var(--blue-900); background: var(--blue-50); border-color: var(--blue-900); }
  .text-button:hover { color: var(--blue-900); background: var(--blue-50); text-decoration-thickness: 0.12rem; }
}
.button--primary:active { background: #00366f; }
.button--secondary:active, .text-button:active { color: #00366f; background: var(--blue-100); }
.toast { position: fixed; z-index: 30; right: 1rem; bottom: 1rem; max-width: min(28rem, calc(100% - 2rem)); padding: 1rem 1.25rem; color: #fff; background: #1a1a1a; border-radius: 0.5rem; box-shadow: 0 0.5rem 2rem rgb(0 0 0 / 25%); }
.toast--error { background: var(--red-700); }
.noscript-message { margin: 1rem; padding: 1rem; border: 2px solid var(--red-700); }

.questions-page { max-width: 70rem; }
.questions-panel { margin-top: 0; }
.questions-title { color: var(--gray-900); font-size: clamp(2rem, 5vw, 3rem); }
.question-summary { margin: 1rem 0 0; color: var(--blue-1000); font-size: 1.25rem; font-weight: 700; }
.all-progress { height: 0.75rem; overflow: hidden; margin-top: 0.75rem; background: var(--gray-200); border-radius: 999px; }
.all-progress span { display: block; width: 0; height: 100%; background: var(--green-700); transition: width 900ms cubic-bezier(0.2, 0, 0, 1); }
.question-legend { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1rem; color: var(--gray-536); font-size: 0.875rem; }
.question-legend span { display: inline-flex; align-items: center; gap: 0.35rem; }
.status-dot { width: 0.75rem; height: 0.75rem; border: 1px solid currentColor; border-radius: 50%; }
.status-dot--correct { color: var(--green-700); background: var(--green-700); }
.status-dot--wrong { color: var(--red-700); background: var(--red-700); }
.status-dot--unstarted { color: var(--gray-420); background: var(--gray-200); }
.session-board-list { display: grid; gap: 1rem; margin-top: 1.5rem; }
.session-board { scroll-margin-top: 5.5rem; padding: 1rem; background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: 0.75rem; }
.session-board:target, .session-board--target { border-color: var(--blue-900); box-shadow: 0 0 0 0.125rem var(--blue-100); }
.session-board__heading { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 0.65rem; }
.session-board__heading h2 { font-size: 1rem; }
.session-board__heading > strong { color: var(--green-700); font-size: 1rem; }
.session-board__heading small { color: var(--gray-536); font-size: 0.7rem; font-weight: 500; }
.mini-question-grid { display: grid; grid-template-columns: repeat(20, minmax(0, 1fr)); gap: 0.3rem; }
.mini-question { position: relative; display: grid; min-width: 0; min-height: 2.55rem; place-items: center; overflow: hidden; color: var(--gray-536); background: var(--white); border: 1px solid var(--gray-200); border-radius: 0.35rem; }
.mini-question span { font-size: clamp(0.55rem, 1.2vw, 0.72rem); font-weight: 700; line-height: 1; }
.mini-question i { position: absolute; top: 0.05rem; right: 0.12rem; font-size: 0.55rem; font-style: normal; font-weight: 700; line-height: 1; }
.mini-question--correct { color: var(--white); background: var(--green-700); border-color: var(--green-700); animation: cell-fill 350ms cubic-bezier(0.2, 0, 0, 1) var(--cell-delay) backwards; }
.mini-question--wrong { color: var(--red-700); background: #fff0f0; border-color: #d96b6b; animation: cell-fill 350ms cubic-bezier(0.2, 0, 0, 1) var(--cell-delay) backwards; }
.mini-question--unstarted i { color: var(--gray-420); }
.questions-updated { margin: 1.5rem 0 0; color: var(--gray-536); font-size: 0.8rem; text-align: right; }

@keyframes cell-fill {
  from { opacity: 0; transform: scale(0.6); }
  to { opacity: 1; transform: scale(1); }
}

@media (max-width: 55rem) {
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .session-list { grid-template-columns: 1fr; }
  .data-panel { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 40rem) {
  .header-inner, .page-shell { width: min(100% - 2rem, 70rem); }
  .page-shell { padding-block: 1rem 3rem; }
  .header-button { padding-inline: 0.7rem; }
  .hero { grid-template-columns: 1fr; gap: 1.5rem; padding: 1.5rem; }
  .progress-ring { width: 9rem; justify-self: center; }
  .progress-ring::before { width: 7rem; }
  .progress-ring__inside strong { font-size: 1.6rem; }
  .stats { gap: 0.75rem; }
  .stat-card { min-height: 7rem; padding: 1rem; }
  .stat-card strong { font-size: 1.75rem; }
  .panel { padding: 1.25rem; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 0.75rem; }
  .section-heading__side { justify-items: start; }
  .session-row { grid-template-columns: minmax(8.5rem, 1fr) minmax(4rem, 1fr) 3rem; gap: 0.5rem; }
  .category-row { grid-template-columns: 1fr 3.5rem; gap: 0.75rem; }
  .category-row__meter { grid-column: 1 / -1; grid-row: 2; }
  .category-row__rate { grid-column: 2; grid-row: 1; }
  .data-actions { width: 100%; align-items: stretch; flex-direction: column; }
  .questions-panel { padding-inline: 0.75rem; }
  .session-board-list { gap: 0.75rem; }
  .session-board { padding: 0.75rem 0.5rem; }
  .mini-question-grid { grid-template-columns: repeat(10, minmax(0, 1fr)); gap: 0.25rem; }
  .mini-question { min-height: 2.1rem; }
  .mini-question span { font-size: 0.62rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-delay: 0ms !important; }
}