/* ==========================================================================
   公民マスター — スタイルシート
   外部ライブラリ不使用。ライト／ダークの両方に対応する。
   ========================================================================== */

:root {
  --bg: #f5f6fa;
  --bg-elev: #ffffff;
  --surface: #ffffff;
  --surface-2: #eef0f6;
  --border: #dde1ea;
  --border-strong: #c6ccda;
  --text: #171a22;
  --text-muted: #5c6474;
  --accent: #2563eb;
  --accent-ink: #ffffff;
  --accent-soft: #e6edfd;
  --success: #0f9d58;
  --success-soft: #e2f6ea;
  --warn: #c2740a;
  --warn-soft: #fdf1dc;
  --danger: #d92d20;
  --danger-soft: #fde8e6;
  --info: #0e7490;
  --info-soft: #e0f2f7;
  --radius: 14px;
  --radius-sm: 9px;
  --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.05), 0 10px 28px -18px rgba(16, 24, 40, 0.35);
  --maxw: 1080px;
  --header-h: 53px;
  --tabbar-h: 60px;
  --font: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI",
    Meiryo, system-ui, -apple-system, "Segoe UI", sans-serif;
}

[data-theme="dark"] {
  --bg: #10131a;
  --bg-elev: #171b24;
  --surface: #171b24;
  --surface-2: #1f242f;
  --border: #2a3140;
  --border-strong: #3a4356;
  --text: #eef1f7;
  --text-muted: #a1aab9;
  --accent: #5b8def;
  --accent-ink: #0b1220;
  --accent-soft: #1c2a47;
  --success: #43c98a;
  --success-soft: #14301f;
  --warn: #e0a94c;
  --warn-soft: #33270f;
  --danger: #f87171;
  --danger-soft: #3a1b1b;
  --info: #4cc4dd;
  --info-soft: #12303a;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 30px -20px rgba(0, 0, 0, 0.8);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #10131a;
    --bg-elev: #171b24;
    --surface: #171b24;
    --surface-2: #1f242f;
    --border: #2a3140;
    --border-strong: #3a4356;
    --text: #eef1f7;
    --text-muted: #a1aab9;
    --accent: #5b8def;
    --accent-ink: #0b1220;
    --accent-soft: #1c2a47;
    --success: #43c98a;
    --success-soft: #14301f;
    --warn: #e0a94c;
    --warn-soft: #33270f;
    --danger: #f87171;
    --danger-soft: #3a1b1b;
    --info: #4cc4dd;
    --info-soft: #12303a;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 30px -20px rgba(0, 0, 0, 0.8);
  }
}

/* ---------------------------------------------------------------- base */

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15.5px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-tap-highlight-color: transparent;
}

/* タップしやすさを優先する要素 */
.btn,
.choice,
.tf,
.chip--button,
.scope-item,
.start-option,
.tab,
.nav__item,
.sheet__item,
.link {
  touch-action: manipulation;
}

h1,
h2,
h3,
h4,
h5 {
  margin: 0 0 0.4em;
  line-height: 1.4;
  font-weight: 700;
}

h1 {
  font-size: 1.6rem;
}
h2 {
  font-size: 1.2rem;
}
h3 {
  font-size: 1.05rem;
}

p {
  margin: 0 0 0.8em;
}

ul,
ol {
  margin: 0 0 0.8em;
  padding-left: 1.3em;
}

li {
  margin-bottom: 0.25em;
}

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.muted {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.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: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.6em 1em;
  z-index: 100;
}
.skip-link:focus {
  left: 8px;
  top: 8px;
}

.banner {
  margin: 0;
  padding: 0.7em 1.2em;
  background: var(--warn-soft);
  color: var(--text);
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

/* ---------------------------------------------------------------- layout */

.view {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.6rem 1.1rem 3rem;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg-elev) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.app-header__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  min-height: var(--header-h);
  padding: 0.55rem 1.1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  flex: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-size: 1.1rem;
  line-height: 1;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  font-size: 1rem;
}

.brand__text small {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  gap: 0.15rem;
  overflow-x: auto;
  scrollbar-width: none;
  flex: 1 1 auto;
  min-width: 0;
}
.nav::-webkit-scrollbar {
  display: none;
}

.nav__item {
  position: relative;
  flex: none;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
}

.nav__item:hover {
  background: var(--surface-2);
  color: var(--text);
}

.nav__item--active {
  background: var(--accent-soft);
  color: var(--accent);
}

.nav__badge {
  display: inline-block;
  margin-left: 0.35em;
  padding: 0 0.35em;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.7rem;
  line-height: 1.5;
  vertical-align: 1px;
}

.app-footer {
  border-top: 1px solid var(--border);
  margin-top: 2rem;
  background: var(--bg-elev);
}

.app-footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.4rem 1.1rem 2.4rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------------------------------------------------------------- header */

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.2rem;
}

.page-header h1 {
  margin-bottom: 0.25rem;
}

.page-header__desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 0;
  max-width: 62ch;
}

.header-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.section-title {
  margin: 2rem 0 0.8rem;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-title::before {
  content: "";
  width: 4px;
  height: 1.1em;
  border-radius: 2px;
  background: var(--accent);
}

.breadcrumb {
  display: flex;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}

.link {
  background: none;
  border: 0;
  padding: 0;
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
  font-size: inherit;
}

/* ---------------------------------------------------------------- panels */

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.2rem;
  margin-bottom: 1.1rem;
}

.panel__title {
  margin-bottom: 0.6rem;
  font-size: 1rem;
}

.panel__subtitle {
  margin-top: 1.2rem;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.panel__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-bottom: 0.7rem;
}

.panel__head h3 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
}

.panel__head-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.panel--result h1 {
  margin-bottom: 0.2rem;
}

/* ---------------------------------------------------------------- buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  padding: 0.52em 1em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, transform 0.06s ease;
}

.btn:hover:not(:disabled) {
  background: var(--surface-2);
}

.btn:active:not(:disabled) {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.btn--primary:hover:not(:disabled) {
  background: color-mix(in srgb, var(--accent) 85%, #000);
}

.btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--accent);
}
.btn--ghost:hover:not(:disabled) {
  background: var(--accent-soft);
}

.btn--danger {
  border-color: var(--danger);
  color: var(--danger);
  background: transparent;
}
.btn--danger:hover:not(:disabled) {
  background: var(--danger-soft);
}

.btn--small {
  padding: 0.32em 0.7em;
  font-size: 0.83rem;
}

.btn--large {
  padding: 0.8em 1.6em;
  font-size: 1rem;
}

.btn--block {
  width: 100%;
}

.btn--file {
  cursor: pointer;
}

.kbd-hint {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.05em 0.4em;
  border-radius: 5px;
  background: color-mix(in srgb, currentColor 14%, transparent);
  opacity: 0.85;
}

/* ---------------------------------------------------------------- chips / badges */

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.chip {
  display: inline-block;
  padding: 0.15em 0.7em;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.chip--small {
  font-size: 0.75rem;
  padding: 0.05em 0.55em;
}

.chip--tag {
  background: var(--accent-soft);
  border-color: transparent;
  color: var(--accent);
}

.chip--button {
  cursor: pointer;
  font-family: inherit;
}

.chip--button:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.chip--active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.badge {
  display: inline-block;
  padding: 0.1em 0.55em;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--surface-2);
  color: var(--text-muted);
}

.badge--choice {
  background: var(--accent-soft);
  color: var(--accent);
}
.badge--multi {
  background: var(--info-soft);
  color: var(--info);
}
.badge--truefalse {
  background: var(--success-soft);
  color: var(--success);
}
.badge--fill {
  background: var(--warn-soft);
  color: var(--warn);
}

.badge--diff1 {
  background: var(--success-soft);
  color: var(--success);
}
.badge--diff2 {
  background: var(--accent-soft);
  color: var(--accent);
}
.badge--diff3 {
  background: var(--danger-soft);
  color: var(--danger);
}

.stars {
  color: #e5a417;
  font-size: 0.8rem;
  letter-spacing: -0.05em;
}

.unit-mark {
  display: inline-grid;
  place-items: center;
  width: 1.9em;
  height: 1.9em;
  border-radius: 9px;
  background: var(--unit-accent, var(--accent));
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1;
  vertical-align: -0.35em;
}

.unit-mark--small {
  width: 1.5em;
  height: 1.5em;
  font-size: 0.8rem;
  border-radius: 7px;
}

/* ---------------------------------------------------------------- bars / rings */

.bar {
  position: relative;
  height: 9px;
  border-radius: 999px;
  background: var(--surface-2);
  overflow: hidden;
}

.bar--thin {
  height: 6px;
}

.bar__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.bar--success .bar__fill {
  background: var(--success);
}
.bar--info .bar__fill {
  background: var(--info);
}
.bar--warn .bar__fill {
  background: var(--warn);
}
.bar--danger .bar__fill {
  background: var(--danger);
}

.bar__label {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 0.7rem;
  font-weight: 700;
}

.ring {
  position: relative;
  display: inline-grid;
  place-items: center;
  flex: none;
}

.ring__track {
  stroke: var(--surface-2);
}

.ring__value {
  stroke: var(--accent);
  transition: stroke-dasharray 0.4s ease;
}

.ring--success .ring__value {
  stroke: var(--success);
}
.ring--danger .ring__value {
  stroke: var(--danger);
}

.ring__text {
  position: absolute;
  text-align: center;
  line-height: 1.15;
}

.ring__text strong {
  display: block;
  font-size: 1.35rem;
}

.ring__text small {
  color: var(--text-muted);
  font-size: 0.72rem;
}

.chart {
  display: block;
  width: 100%;
  height: 96px;
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 4px;
}

.chart__bar {
  fill: var(--accent);
  opacity: 0.85;
}

.heatmap {
  display: grid;
  grid-template-columns: repeat(14, 1fr);
  gap: 4px;
}

.heatmap__cell {
  aspect-ratio: 1;
  border-radius: 4px;
  background: var(--surface-2);
  border: 1px solid var(--border);
}

.heatmap__cell--1 {
  background: color-mix(in srgb, var(--accent) 22%, var(--surface));
  border-color: transparent;
}
.heatmap__cell--2 {
  background: color-mix(in srgb, var(--accent) 45%, var(--surface));
  border-color: transparent;
}
.heatmap__cell--3 {
  background: color-mix(in srgb, var(--accent) 70%, var(--surface));
  border-color: transparent;
}
.heatmap__cell--4 {
  background: var(--accent);
  border-color: transparent;
}

/* ---------------------------------------------------------------- home */

.panel--today {
  padding: 1.3rem;
}

.today {
  display: flex;
  gap: 1.4rem;
  align-items: center;
  flex-wrap: wrap;
}

.today__body {
  flex: 1 1 260px;
}

.today__line {
  font-size: 1.05rem;
  margin-bottom: 0.2em;
}

.today__hint {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.today__actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.6rem;
}

.today__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.8rem;
  margin: 0;
  flex: 1 1 240px;
}

.today__stats dt {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.today__stats dd {
  margin: 0.1em 0 0;
  font-size: 1.3rem;
  font-weight: 700;
}

.today__stats small {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
}

.unit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.unit-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 4px solid var(--unit-accent, var(--accent));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.unit-card__head {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
}

.unit-card__mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 9px;
  background: var(--unit-accent, var(--accent));
  color: #fff;
  font-weight: 700;
}

.unit-card__head h3 {
  margin: 0;
  font-size: 1.02rem;
}

.unit-card__meta {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.unit-card__summary {
  margin: 0;
  font-size: 0.87rem;
  color: var(--text-muted);
}

.unit-card__meters {
  display: grid;
  gap: 0.4rem;
}

.meter {
  display: grid;
  grid-template-columns: 3.6rem 1fr 3rem;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
}

.meter__label {
  color: var(--text-muted);
}

.meter__value {
  text-align: right;
  font-weight: 700;
}

.unit-card__foot {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: 0.4rem;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
}

.quick-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.quick-card h3 {
  margin: 0;
}

.quick-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex: 1;
}

.quick-card .btn {
  align-self: flex-start;
}

/* ---------------------------------------------------------------- meters */

.panel--meters {
  padding: 1rem 1.2rem;
}

.meter-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.meter-block {
  display: grid;
  gap: 0.3rem;
}

.meter-block__label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.meter-block__value {
  font-size: 0.85rem;
  font-weight: 600;
}

/* ---------------------------------------------------------------- unit detail */

.point-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
}

.point-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem;
}

.point-card header {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}

.point-card header h3 {
  margin: 0;
  font-size: 1rem;
}

.point-card__no {
  font-weight: 700;
  color: var(--accent);
}

.point-card__focus {
  font-size: 0.8rem;
  color: var(--text-muted);
  border-left: 3px solid var(--accent);
  padding-left: 0.6rem;
  margin-bottom: 0.7rem;
}

.point-block h4 {
  font-size: 0.88rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.point-block ul {
  font-size: 0.87rem;
  padding-left: 1.1rem;
  margin-bottom: 0.6rem;
}

.section-list {
  display: grid;
  gap: 1rem;
}

.section-row {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.2rem;
}

.section-row__head {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
}

.section-row__head h3 {
  margin: 0;
  font-size: 1.05rem;
}

.section-row__no {
  font-weight: 700;
  color: var(--accent);
  flex: none;
}

.section-row__focus {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.section-row__summary {
  font-size: 0.9rem;
  margin: 0.6rem 0;
}

.section-row__meters {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.section-row__terms {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  align-items: center;
  margin: 0.6rem 0;
}

.section-row__terms-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.term-pill {
  padding: 0.1em 0.6em;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: 0.8rem;
}

.section-row__foot {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: 0.8rem;
}

.guideline-text {
  margin-top: 0.8rem;
  border-top: 1px dashed var(--border);
  padding-top: 0.6rem;
  font-size: 0.85rem;
}

.guideline-text summary {
  cursor: pointer;
  color: var(--accent);
  font-weight: 600;
}

.guideline-text__body {
  margin-top: 0.6rem;
  color: var(--text-muted);
}

/* ---------------------------------------------------------------- start options */

.start-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 0.7rem;
}

.start-option {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  text-align: left;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  cursor: pointer;
  transition: border-color 0.12s ease, background 0.12s ease;
}

.start-option:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.start-option:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.start-option strong {
  font-size: 0.98rem;
}

.start-option span {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.start-option--primary {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.scope-list {
  list-style: none;
  padding: 0;
  margin: 0.8rem 0 0;
  display: grid;
  gap: 0.4rem;
}

.scope-item {
  width: 100%;
  display: grid;
  grid-template-columns: 2.4rem 1fr auto;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  text-align: left;
  font-size: 0.9rem;
}

.scope-item:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.scope-item__no {
  font-weight: 700;
  color: var(--accent);
}

.scope-item__meta {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.due-dot {
  color: var(--warn);
  font-weight: 700;
}

/* ---------------------------------------------------------------- session bar */

.session-bar {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 1rem;
}

.session-bar__progress {
  flex: 1;
}

.session-bar__count {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ---------------------------------------------------------------- flashcards */

.flashcard {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 1.6rem 1.4rem;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  cursor: pointer;
}

.flashcard--flipped {
  cursor: default;
}

.flashcard__head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.flashcard__scope {
  flex: 1;
}

.flashcard__term {
  text-align: center;
  margin: 1rem 0;
}

.flashcard__term-text {
  font-size: 2rem;
  font-weight: 700;
  margin: 0;
  line-height: 1.3;
}

.flashcard__reading {
  margin: 0.2em 0 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.flashcard__reveal {
  align-self: center;
  margin: auto 0;
}

.flashcard__back {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

.flashcard__definition {
  font-size: 1.05rem;
  margin-bottom: 0.6em;
}

.flashcard__detail {
  font-size: 0.9rem;
  color: var(--text-muted);
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.9rem;
}

.flashcard__related,
.flashcard__tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.rating-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  margin-top: 1rem;
}

.btn--rating {
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.8rem 0.6rem;
  align-items: center;
}

.btn--rating small {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.35;
}

.btn--rating-again {
  border-color: var(--danger);
  color: var(--danger);
}
.btn--rating-unsure {
  border-color: var(--warn);
  color: var(--warn);
}
.btn--rating-known {
  border-color: var(--success);
  color: var(--success);
}

.hint {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 0.8rem;
}

/* ---------------------------------------------------------------- questions */

.question {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.3rem 1.4rem;
}

.question__head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.8rem;
  font-size: 0.8rem;
}

.question__no {
  font-weight: 700;
  color: var(--accent);
}

.question__scope {
  color: var(--text-muted);
}

.question__prompt {
  font-size: 1.08rem;
  font-weight: 600;
  margin-bottom: 1rem;
  line-height: 1.8;
}

.blank {
  display: inline-block;
  min-width: 6em;
  border-bottom: 2px solid var(--accent);
  margin: 0 0.2em;
}

.choices {
  list-style: none;
  padding: 0;
  margin: 0 0 0.8rem;
  display: grid;
  gap: 0.55rem;
}

.choice {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  cursor: pointer;
  text-align: left;
  line-height: 1.65;
  font-size: 0.95rem;
}

.choice:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.choice:disabled {
  cursor: default;
}

.choice__mark {
  display: grid;
  place-items: center;
  width: 1.7em;
  height: 1.7em;
  flex: none;
  border-radius: 50%;
  background: var(--surface-2);
  font-weight: 700;
  font-size: 0.82rem;
}

.choice--selected {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.choice--correct {
  border-color: var(--success);
  background: var(--success-soft);
}

.choice--correct .choice__mark {
  background: var(--success);
  color: #fff;
}

.choice--wrong {
  border-color: var(--danger);
  background: var(--danger-soft);
}

.choice--wrong .choice__mark {
  background: var(--danger);
  color: #fff;
}

.truefalse {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem;
}

.tf {
  padding: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
}

.tf:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.tf--correct {
  border-color: var(--success);
  background: var(--success-soft);
}

.tf--wrong {
  border-color: var(--danger);
  background: var(--danger-soft);
}

.fill__label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.fill__row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.fill__input {
  flex: 1 1 220px;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--text);
  font-size: 1rem;
}

.fill__input:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.fill__answer {
  margin-top: 0.7rem;
  font-size: 0.9rem;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
}

.fill__answer--ok {
  background: var(--success-soft);
}

.fill__answer--ng {
  background: var(--danger-soft);
}

.feedback {
  margin-top: 1.1rem;
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  border-left: 5px solid var(--accent);
  background: var(--surface-2);
  /* 固定操作バーに隠れないよう、スクロール時の余白を確保する */
  scroll-margin-bottom: 7.5rem;
}

.feedback--ok {
  border-color: var(--success);
  background: var(--success-soft);
}

.feedback--ng {
  border-color: var(--danger);
  background: var(--danger-soft);
}

.feedback__head {
  font-weight: 700;
  margin-bottom: 0.3em;
}

.feedback__body {
  font-size: 0.92rem;
  margin-bottom: 0.8em;
}

/* ---------------------------------------------------------------- results */

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.8rem;
  margin: 1rem 0;
}

.result-stat {
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 0.8rem;
  text-align: center;
}

.result-stat span {
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
}

.result-stat small {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.result-stat--good {
  background: var(--success-soft);
}
.result-stat--mid {
  background: var(--warn-soft);
}
.result-stat--bad {
  background: var(--danger-soft);
}

.result-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.result-hero {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
  margin: 1rem 0;
}

.result-hero__body {
  flex: 1 1 280px;
}

.verdict {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.3em;
}

.verdict--ok {
  color: var(--success);
}

.verdict--ng {
  color: var(--warn);
}

.result-breakdown {
  list-style: none;
  padding: 0;
  margin: 0.6rem 0;
  display: grid;
  gap: 0.4rem;
  font-size: 0.85rem;
}

.result-breakdown li {
  display: grid;
  grid-template-columns: 8rem 1fr 4rem;
  align-items: center;
  gap: 0.6rem;
}

.result-breakdown--wide li {
  grid-template-columns: minmax(10rem, 16rem) 1fr auto;
}

.wrong-list {
  padding-left: 1.2rem;
  margin: 0;
  display: grid;
  gap: 1rem;
}

.wrong-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
}

.wrong-item__head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.4rem;
  font-size: 0.8rem;
}

.wrong-item__count {
  margin-left: auto;
  color: var(--danger);
  font-weight: 700;
}

.wrong-item__prompt {
  font-weight: 600;
  margin-bottom: 0.4em;
}

.wrong-item__choices {
  list-style: none;
  padding: 0;
  font-size: 0.88rem;
  margin-bottom: 0.5em;
}

.wrong-item__choices li {
  padding: 0.15em 0.5em;
  border-radius: 5px;
  color: var(--text-muted);
}

.wrong-item__choices li.ok {
  background: var(--success-soft);
  color: var(--text);
  font-weight: 600;
}

.wrong-item__answer {
  font-size: 0.9rem;
}

.wrong-item__explanation {
  font-size: 0.87rem;
  color: var(--text-muted);
  margin: 0.3em 0 0;
}

/* ---------------------------------------------------------------- review */

.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.big-number {
  font-size: 2.4rem;
  font-weight: 700;
  margin: 0.2em 0;
  line-height: 1.1;
}

.big-number small {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.card-compact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
}

.card-compact-list li {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.7rem;
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.9rem;
}

.card-compact-list__term {
  margin: 0;
  font-weight: 700;
}

.card-compact-list__def {
  margin: 0;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.card-compact-list__meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ---------------------------------------------------------------- glossary */

.panel--filters {
  display: grid;
  gap: 0.7rem;
}

.filter-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  align-items: center;
}

.filter-group {
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
  align-items: center;
}

.filter-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.search {
  flex: 1 1 240px;
}

/* 用語辞典の検索欄（スクロールしても上に残す） */
.glossary-search-sticky {
  position: sticky;
  top: var(--header-h);
  z-index: 14;
  background: var(--bg);
  padding: 0.3rem 0 0.6rem;
}

.search input {
  width: 100%;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--text);
  font-size: 0.95rem;
}

.search input:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.result-count {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0.4rem 0 0.8rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: baseline;
}

.result-count__filters {
  font-size: 0.78rem;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  padding: 0.1em 0.7em;
}

.glossary {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.8rem;
}

.glossary__item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.9rem 1.1rem;
}

.glossary__head {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.glossary__head h3 {
  margin: 0;
  font-size: 1.05rem;
}

.glossary__reading {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.glossary__def {
  margin: 0.5em 0 0.3em;
  font-size: 0.94rem;
}

.glossary__detail {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 0.4em;
}

.glossary__related,
.glossary__meta {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0.3em 0 0;
}

.glossary__state {
  margin-left: auto;
}

/* ---------------------------------------------------------------- stats */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.stat-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.4rem;
}

.stats-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.stats-table th,
.stats-table td {
  text-align: left;
  padding: 0.55rem 0.5rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.stats-table thead th {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 600;
}

.stats-table tbody th {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 600;
}

.history {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.4rem;
  font-size: 0.86rem;
}

.history li {
  display: grid;
  grid-template-columns: 5rem 1fr auto auto;
  gap: 0.7rem;
  align-items: center;
  padding: 0.45rem 0;
  border-bottom: 1px dashed var(--border);
}

.history__kind {
  font-size: 0.72rem;
  font-weight: 700;
  text-align: center;
  padding: 0.1em 0.4em;
  border-radius: 5px;
  background: var(--surface-2);
  color: var(--text-muted);
}

.history__kind--cards {
  background: var(--accent-soft);
  color: var(--accent);
}
.history__kind--quiz {
  background: var(--info-soft);
  color: var(--info);
}
.history__kind--test {
  background: var(--warn-soft);
  color: var(--warn);
}

.history__score {
  font-weight: 700;
}

.history__time {
  color: var(--text-muted);
  font-size: 0.8rem;
  white-space: nowrap;
}

/* ---------------------------------------------------------------- settings */

.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px dashed var(--border);
}

.setting-row:last-of-type {
  border-bottom: 0;
}

.setting-row label {
  font-weight: 600;
}

.setting-row p {
  margin: 0;
}

.setting-row select,
.setting-row input[type="number"] {
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--text);
  font-size: 0.9rem;
  min-width: 5rem;
}

.setting-row input[type="checkbox"] {
  width: 1.3rem;
  height: 1.3rem;
  accent-color: var(--accent);
}

.setting-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.kv {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.6rem;
  margin: 0.8rem 0;
}

.kv div {
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.7rem;
}

.kv dt {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.kv dd {
  margin: 0.1em 0 0;
  font-weight: 700;
}

/* ---------------------------------------------------------------- guide */

.source-list {
  font-size: 0.85rem;
  word-break: break-all;
}

.guideline-lead {
  background: var(--surface-2);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  font-size: 0.92rem;
}

.goal-list {
  padding-left: 1.3rem;
  display: grid;
  gap: 0.8rem;
  margin-top: 0.9rem;
}

.goal-list h3 {
  font-size: 0.92rem;
  color: var(--accent);
  margin-bottom: 0.2em;
}

.goal-list p {
  font-size: 0.9rem;
  margin: 0;
}

.framework-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.framework-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem;
}

.framework-card h3 {
  color: var(--accent);
}

.framework-card p {
  font-size: 0.88rem;
}

.framework-card__think {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin: 0;
}

.guide-section {
  border-top: 1px solid var(--border);
  padding: 0.9rem 0;
}

.guide-section:first-of-type {
  border-top: 0;
}

.guide-section__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.guide-section__head h4 {
  margin: 0;
  font-size: 0.98rem;
}

.guide-section__focus {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0.4em 0;
  border-left: 3px solid var(--accent);
  padding-left: 0.6rem;
}

.guide-section__block h5 {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0.6em 0 0.2em;
}

.guide-section__block ul {
  font-size: 0.87rem;
  padding-left: 1.2rem;
  margin: 0;
}

.guide-section__note {
  font-size: 0.82rem;
  background: var(--warn-soft);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.7rem;
  margin: 0.5em 0 0;
}

.guide-section__app {
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

.guide-section__app summary {
  cursor: pointer;
  color: var(--accent);
  font-weight: 600;
}

.guide-note {
  border-top: 1px solid var(--border);
  padding-top: 0.7rem;
  margin-top: 0.7rem;
}

.guide-note:first-child {
  border-top: 0;
  margin-top: 0;
}

.guide-note h3 {
  font-size: 0.95rem;
}

.guide-note ul {
  font-size: 0.87rem;
}

.flow-list {
  font-size: 0.9rem;
}

/* ---------------------------------------------------------------- 下部タブ／メニューシート */

.tabbar {
  display: none;
}

.tab {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  min-height: var(--tabbar-h);
  padding: 6px 2px;
  border: 0;
  background: none;
  color: var(--text-muted);
  text-decoration: none;
  font-family: inherit;
  cursor: pointer;
}

.tab__icon {
  display: grid;
  place-items: center;
}

.tab__label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1;
}

.tab--active {
  color: var(--accent);
}

.tab--active::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--accent);
}

.tab__badge {
  position: absolute;
  top: 3px;
  left: 50%;
  margin-left: 5px;
  min-width: 17px;
  padding: 0 4px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.62rem;
  font-weight: 700;
  line-height: 17px;
  text-align: center;
}

.tab:active {
  background: var(--surface-2);
}

.sheet {
  position: fixed;
  inset: 0;
  z-index: 60;
}

.sheet__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 10, 16, 0.5);
  animation: fade-in 0.16s ease;
}

.sheet__panel {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  max-width: 620px;
  margin: 0 auto;
  background: var(--surface);
  border-radius: 20px 20px 0 0;
  padding: 0.7rem 0.9rem calc(1rem + env(safe-area-inset-bottom));
  box-shadow: 0 -12px 40px -14px rgba(0, 0, 0, 0.55);
  animation: sheet-up 0.22s cubic-bezier(0.2, 0.9, 0.3, 1);
}

.sheet__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 0.3rem 0.3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.4rem;
}

.sheet__title {
  margin: 0;
  font-weight: 700;
  font-size: 0.95rem;
}

.sheet__close {
  border: 0;
  background: none;
  padding: 0.55rem;
  border-radius: 10px;
  color: var(--text-muted);
  cursor: pointer;
  display: grid;
  place-items: center;
}

.sheet__items {
  display: grid;
  gap: 0.15rem;
}

.sheet__item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  min-height: 58px;
  padding: 0.55rem 0.6rem;
  border-radius: 12px;
  text-decoration: none;
  color: var(--text);
}

.sheet__item:hover,
.sheet__item:active {
  background: var(--surface-2);
}

.sheet__item-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  border-radius: 11px;
  background: var(--accent-soft);
  color: var(--accent);
}

.sheet__item-body {
  display: flex;
  flex-direction: column;
  line-height: 1.35;
}

.sheet__item-body small {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.sheet__item-arrow {
  margin-left: auto;
  color: var(--text-muted);
  font-size: 1.4rem;
  line-height: 1;
}

body.has-sheet {
  overflow: hidden;
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes sheet-up {
  from {
    transform: translateY(100%);
  }
  to {
    transform: none;
  }
}

/* ---------------------------------------------------------------- 再開バナー */

.resume {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-radius: var(--radius);
  padding: 0.65rem 0.85rem;
  margin-bottom: 1rem;
}

.resume__icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: none;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
}

.resume__body {
  display: flex;
  flex-direction: column;
  flex: 1 1 9rem;
  line-height: 1.35;
}

.resume__body small {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ---------------------------------------------------------------- セッション中の操作バー */

.session-actions {
  display: contents;
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ---------------------------------------------------------------- misc */

.empty {
  text-align: center;
  padding: 1.6rem 1rem;
}

.empty__title {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 0.3em;
}

.empty__desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 0.9em;
}

.error {
  color: var(--danger);
  font-weight: 600;
}

.toast-host {
  position: fixed;
  left: 50%;
  bottom: 1.2rem;
  transform: translateX(-50%);
  display: grid;
  gap: 0.5rem;
  z-index: 50;
  pointer-events: none;
}

.toast {
  background: var(--text);
  color: var(--bg);
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: var(--shadow);
  animation: toast-in 0.2s ease;
}

.toast--error {
  background: var(--danger);
  color: #fff;
}

.toast--out {
  opacity: 0;
  transition: opacity 0.3s ease;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------------------------------------------------------------- responsive */

/* ==========================================================================
   スマートフォン（≤720px）
   ・ナビゲーションを下部タブに置き換え、親指で届く位置に主要操作を集める
   ・学習セッション中は「集中モード」（ヘッダーとタブバーを隠し、操作バーを下端に固定）
   ・タップ領域は 44px 以上を確保する
   ========================================================================== */

@media (max-width: 720px) {
  body {
    font-size: 16px;
    padding-bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom));
  }

  body.is-session {
    padding-bottom: 0;
  }

  .view {
    padding: 1rem max(0.85rem, env(safe-area-inset-left)) 2.5rem max(0.85rem, env(safe-area-inset-right));
  }

  /* ヘッダーはブランドだけ。ナビゲーションは下部タブへ移動 */
  .app-header__inner {
    padding: 0.4rem max(0.85rem, env(safe-area-inset-left)) 0.4rem max(0.85rem, env(safe-area-inset-right));
  }
  .nav {
    display: none;
  }
  .brand__text {
    font-size: 1.05rem;
  }
  .brand__text small {
    display: none;
  }

  /* 集中モード */
  body.is-session .app-header,
  body.is-session .tabbar,
  body.is-session .app-footer {
    display: none;
  }
  body.is-session {
    overscroll-behavior-y: contain;
  }
  body.is-session .view {
    padding-top: 0.5rem;
    padding-bottom: calc(6.5rem + env(safe-area-inset-bottom));
  }

  /* 下部タブバー */
  .tabbar {
    display: flex;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 30;
    background: color-mix(in srgb, var(--bg-elev) 94%, transparent);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
    padding-bottom: env(safe-area-inset-bottom);
  }

  /* セッション中の固定操作バー */
  body.is-session .session-actions {
    display: block;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 25;
    padding: 0.55rem max(0.85rem, env(safe-area-inset-left)) calc(0.55rem + env(safe-area-inset-bottom))
      max(0.85rem, env(safe-area-inset-right));
    background: color-mix(in srgb, var(--bg-elev) 96%, transparent);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
  }
  body.is-session .session-actions .rating-row {
    margin-top: 0;
  }
  body.is-session .session-actions .btn--rating {
    min-height: 60px;
  }
  body.is-session .session-actions .btn--rating small {
    display: none;
  }

  /* セッション上部のバー（進捗と「やめる」） */
  .session-bar {
    position: sticky;
    top: 0;
    z-index: 12;
    margin: -0.5rem -0.85rem 0.9rem;
    padding: 0.5rem 0.85rem;
    background: color-mix(in srgb, var(--bg) 95%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
  }
  .session-bar__count {
    font-size: 0.8rem;
  }

  /* タップ領域 */
  .btn {
    min-height: 44px;
    padding: 0.6em 1em;
    font-size: 0.95rem;
  }
  .btn--small {
    min-height: 38px;
    font-size: 0.86rem;
  }
  .btn--large {
    min-height: 50px;
    font-size: 1.02rem;
  }
  .choice {
    min-height: 54px;
    padding: 0.85rem 0.9rem;
    font-size: 1rem;
  }
  .tf {
    min-height: 58px;
  }
  .chip--button {
    display: inline-flex;
    align-items: center;
    min-height: 36px;
    padding: 0.35em 0.85em;
  }
  .scope-item {
    min-height: 58px;
  }
  .start-option {
    min-height: 72px;
  }
  .fill__input {
    min-height: 50px;
    font-size: 16px;
  }
  .search input {
    min-height: 46px;
    font-size: 16px;
  }

  /* ホーム */
  .today {
    flex-direction: column;
    align-items: stretch;
    gap: 0.9rem;
  }
  /* 縦並びでは flex-basis が「高さ」になってしまうため打ち消す */
  .today__body,
  .today__stats {
    flex: 0 1 auto;
  }
  .today__ring {
    align-self: center;
  }
  .today__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
  }
  .today__stats dd {
    font-size: 1.15rem;
  }
  .unit-grid,
  .quick-grid,
  .point-grid,
  .framework-grid,
  .start-options,
  .review-grid,
  .stat-grid {
    grid-template-columns: 1fr;
  }
  .unit-card__foot .btn {
    flex: 1 1 auto;
  }
  .section-row__foot .btn,
  .header-actions .btn,
  .today__actions .btn,
  .result-actions .btn {
    flex: 1 1 auto;
  }
  .header-actions,
  .today__actions,
  .result-actions {
    width: 100%;
  }

  /* 用語カード */
  .flashcard {
    min-height: min(46dvh, 420px);
    padding: 1.2rem 1rem;
    border-radius: var(--radius);
  }
  .flashcard__term-text {
    font-size: 1.75rem;
  }
  .flashcard__definition {
    font-size: 1.02rem;
  }
  .rating-row {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.45rem;
  }
  .btn--rating {
    padding: 0.7rem 0.4rem;
  }
  .btn--rating strong {
    font-size: 0.92rem;
  }

  /* 問題 */
  .question {
    padding: 1rem;
  }
  .question__prompt {
    font-size: 1.05rem;
  }
  .truefalse {
    grid-template-columns: 1fr;
  }

  /* 結果・記録 */
  .result-hero {
    gap: 1rem;
  }
  .result-hero .ring {
    margin: 0 auto;
  }
  .history li {
    grid-template-columns: 4.5rem 1fr;
    row-gap: 0.15rem;
  }
  .history__score,
  .history__time {
    grid-column: 2;
  }
  .result-breakdown li,
  .result-breakdown--wide li {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
  .stats-table {
    min-width: 560px;
  }
  .heatmap {
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
  }
  .card-compact-list li {
    grid-template-columns: auto 1fr;
  }
  .card-compact-list__meta {
    grid-column: 2;
    white-space: normal;
  }

  /* 用語辞典 */
  .panel--filters {
    padding: 0.75rem 0.85rem;
  }
  .filter-row {
    min-width: 0;
  }
  .filter-group--tags {
    flex-wrap: nowrap;
    min-width: 0;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 0.3rem;
  }
  .filter-group--tags .chip {
    flex: none;
  }
  .glossary__state {
    margin-left: 0;
    width: 100%;
  }

  /* 設定 */
  .setting-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }
  .setting-row select,
  .setting-row input[type="number"] {
    width: 100%;
    min-height: 44px;
  }
  .setting-actions .btn {
    width: 100%;
  }

  /* トースト */
  .toast-host {
    left: 0.85rem;
    right: 0.85rem;
    transform: none;
    bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom) + 0.8rem);
  }
  body.is-session .toast-host {
    bottom: calc(6.5rem + env(safe-area-inset-bottom));
  }
  .toast {
    text-align: center;
  }

  .page-header {
    margin-bottom: 1rem;
  }
  .page-header h1 {
    font-size: 1.45rem;
  }
  /* ホームの副次的なリンクはタブバー／メニューから辿れるので省く */
  .header-actions--spare {
    display: none;
  }
  .section-title {
    margin-top: 1.5rem;
  }
}

/* タッチ端末ではキーボードのヒントを出さない */
@media (hover: none) {
  .kbd-hint {
    display: none;
  }
}

/* 小型端末 */
@media (max-width: 380px) {
  .tab__label {
    font-size: 0.62rem;
  }
  .today__stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .unit-card__foot .btn {
    flex: 1 1 45%;
  }
}

/* 横向きの低い画面 */
@media (max-width: 900px) and (orientation: landscape) and (max-height: 480px) {
  .flashcard {
    min-height: auto;
  }
  .flashcard__term-text {
    font-size: 1.5rem;
  }
  .flashcard__term {
    margin: 0.4rem 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}