:root {
  color-scheme: light;
  --color-bg-1: #eef2ff;
  --color-bg-2: #f5f3ff;
  --color-surface: #ffffff;
  --color-control: #fafafa;
  --color-subtle-surface: #f6f7f9;
  --color-text: #1e2433;
  --color-muted: #6b7280;
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-primary-light: #eef0ff;
  --color-correct: #16a34a;
  --color-correct-bg: #dcfce7;
  --color-correct-strong: #166534;
  --color-correct-border: #86efac;
  --color-correct-hover: #bbf7d0;
  --color-incorrect: #dc2626;
  --color-incorrect-bg: #fee2e2;
  --color-border: #e5e7eb;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-card: 0 4px 16px rgba(30, 36, 51, 0.06), 0 1px 3px rgba(30, 36, 51, 0.08);
  --shadow-card-hover: 0 10px 24px rgba(79, 70, 229, 0.14);
}

:root[data-theme='dark'] {
  color-scheme: dark;
  --color-bg-1: #10152a;
  --color-bg-2: #1c1a35;
  --color-surface: #191f34;
  --color-control: #12182b;
  --color-subtle-surface: #252a40;
  --color-text: #eef2ff;
  --color-muted: #aab4cb;
  --color-primary: #818cf8;
  --color-primary-dark: #c4b5fd;
  --color-primary-light: #252b50;
  --color-correct: #4ade80;
  --color-correct-bg: #143b2a;
  --color-correct-strong: #bbf7d0;
  --color-correct-border: #4ade80;
  --color-correct-hover: #1b4d34;
  --color-incorrect: #f87171;
  --color-incorrect-bg: #4b222d;
  --color-border: #3a4565;
  --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.22), 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-card-hover: 0 10px 24px rgba(0, 0, 0, 0.3);
}

:root {
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
}

@keyframes view-enter {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes list-enter {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.985);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes surface-enter {
  from {
    opacity: 0;
    transform: translateY(-4px) scale(0.98);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

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

  to {
    opacity: 1;
  }
}

@keyframes success-pop {
  from {
    opacity: 0;
    transform: scale(0.97);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes splash-mark-in {
  from {
    opacity: 0;
    transform: scale(0.92) translateY(6px);
  }

  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes splash-copy-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes splash-screen-out {
  from {
    opacity: 1;
  }

  to {
    opacity: 0;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Hiragino Sans", "Yu Gothic", "Segoe UI", sans-serif;
  background: linear-gradient(160deg, var(--color-bg-1), var(--color-bg-2) 60%);
  color: var(--color-text);
  line-height: 1.6;
}

.splash-screen {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  background: linear-gradient(135deg, var(--color-primary), #8b5cf6);
  color: #fff;
}

.splash-screen[hidden] {
  display: none;
}

.splash-screen.is-hiding {
  pointer-events: none;
  animation: splash-screen-out 180ms var(--ease-out) both;
}

.splash-mark {
  width: 4.25rem;
  height: 4.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 1.35rem;
  background: rgba(255, 255, 255, 0.16);
  box-shadow: 0 12px 28px rgba(30, 36, 51, 0.18);
  animation: splash-mark-in 420ms var(--ease-out) both;
}

.splash-mark svg {
  width: 2.2rem;
  height: 2.2rem;
}

.splash-title {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  animation: splash-copy-in 320ms var(--ease-out) 100ms backwards;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: linear-gradient(120deg, var(--color-primary), #8b5cf6);
  color: #fff;
  padding: 1.4rem 1.25rem;
  box-shadow: 0 2px 12px rgba(79, 70, 229, 0.25);
}

.app-header-bar {
  max-width: 640px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  position: relative;
}

.app-header h1 {
  margin: 0;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: 0.02em;
}

.app-header-icon {
  display: inline-flex;
  vertical-align: -0.2em;
}

.app-header-icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.app-main-nav {
  max-width: 640px;
  margin: 0.9rem auto 0;
  display: flex;
  gap: 0.35rem;
}

.app-nav-item {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  padding: 0.5rem 0.75rem;
  background: transparent;
  color: rgba(255, 255, 255, 0.72);
  font: inherit;
  font-size: 0.86rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.app-nav-item svg {
  width: 1rem;
  height: 1rem;
  flex: none;
}

.app-nav-item:hover,
.app-nav-item.is-active {
  border-color: rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.17);
  color: #fff;
}

.app-nav-item:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.menu-toggle {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: #fff;
  cursor: pointer;
  transition: background 0.12s ease;
}

.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.28);
}

.menu-toggle svg {
  width: 1.4rem;
  height: 1.4rem;
}

.menu-panel {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 1.25rem;
  z-index: 20;
  min-width: 220px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card-hover);
  padding: 0.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.menu-panel[hidden] {
  display: none;
}

.menu-main {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  max-height: 70vh;
  overflow-y: auto;
}

.menu-main[hidden] {
  display: none;
}

.menu-pinned-item {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.menu-pinned-item .menu-item {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.menu-pinned-remove {
  flex: none;
  width: 1.8rem;
  height: 1.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: none;
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
}

.menu-pinned-remove:hover {
  background: var(--color-incorrect-bg);
  color: var(--color-incorrect);
}

.menu-pinned-remove svg {
  width: 1rem;
  height: 1rem;
}

.menu-search {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: min(320px, 80vw);
}

.menu-search[hidden] {
  display: none;
}

.menu-search-back {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  align-self: flex-start;
  background: none;
  border: none;
  color: var(--color-primary-dark);
  font: inherit;
  font-weight: 600;
  font-size: 0.88rem;
  padding: 0.2rem 0.3rem;
  cursor: pointer;
}

.menu-search-back svg {
  width: 1rem;
  height: 1rem;
  flex: none;
}

.menu-search-input {
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  font: inherit;
  color: var(--color-text);
  background: var(--color-control);
}

.menu-search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-surface);
}

.menu-search-results {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  max-height: 50vh;
  overflow-y: auto;
}

.menu-search-empty {
  padding: 0.6rem 0.7rem;
  color: var(--color-muted);
  font-size: 0.88rem;
}

.menu-search-result {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.6rem;
  border-radius: var(--radius-sm);
}

.menu-search-result:hover {
  background: var(--color-primary-light);
}

.menu-search-result-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

.menu-search-result-name {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.menu-search-result-exam {
  font-size: 0.76rem;
  color: var(--color-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.menu-pin-toggle {
  flex: none;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: 999px;
  padding: 0.3rem 0.65rem;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  cursor: pointer;
}

.menu-pin-toggle:hover {
  border-color: var(--color-primary);
}

.menu-pin-toggle.is-pinned {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.7rem;
  font: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--color-text);
  text-decoration: none;
  cursor: pointer;
}

.menu-item svg {
  width: 1rem;
  height: 1rem;
  flex: none;
}

.menu-item span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.menu-item:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.menu-item[hidden] {
  display: none;
}

.menu-divider {
  height: 1px;
  background: var(--color-border);
  margin: 0.25rem 0.4rem;
}

.menu-version {
  margin: 0.15rem 0 0;
  padding: 0.5rem 0.7rem 0.1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.75rem;
  color: var(--color-muted);
  text-align: center;
  flex: none;
}

.app-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  text-align: center;
  padding: 0.6rem 1.25rem;
  font-size: 0.8rem;
  color: var(--color-muted);
}

.app-footer a {
  color: var(--color-muted);
  text-decoration: none;
}

.app-footer a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.app-footer-sep {
  margin: 0 0.35rem;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
}

.view[hidden] {
  display: none;
}

.view.view-entering {
  animation: view-enter 220ms var(--ease-out) both;
}

.card-list > .card,
.dashboard-subject-item {
  animation: list-enter 260ms var(--ease-out) backwards;
  animation-delay: calc(var(--stagger-index, 0) * 45ms);
}

.menu-panel.menu-panel-entering {
  transform-origin: top right;
  animation: surface-enter 180ms var(--ease-out) both;
}

h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0.25rem 0 1.1rem;
  color: var(--color-text);
}

.library-heading {
  margin-bottom: 1.25rem;
}

.section-kicker {
  margin: 0 0 0.2rem;
  color: var(--color-primary-dark);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.library-heading h2,
.dashboard-heading h2 {
  margin: 0 0 0.25rem;
}

.library-heading p:last-child,
.dashboard-heading p:last-child {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.dashboard-view {
  max-width: 900px;
  margin-inline: auto;
}

.dashboard-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.dashboard-heading-mark {
  flex: none;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), #8b5cf6);
  color: #fff;
  font-size: 1.4rem;
  font-weight: 800;
  box-shadow: 0 6px 14px rgba(79, 70, 229, 0.22);
}

.dashboard-heading-mark svg {
  width: 1.5rem;
  height: 1.5rem;
}

.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
}

.dashboard-stat {
  min-width: 0;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.dashboard-stat-accent {
  border-color: rgba(99, 102, 241, 0.45);
  background: var(--color-primary-light);
}

.dashboard-stat-label,
.dashboard-stat-note {
  display: block;
  color: var(--color-muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.dashboard-stat strong {
  display: block;
  margin: 0.2rem 0;
  color: var(--color-text);
  font-size: 1.65rem;
  line-height: 1.2;
}

.dashboard-section {
  margin-top: 1rem;
  padding: 1.2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.dashboard-section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.dashboard-section-heading h3 {
  margin: 0 0 0.2rem;
  font-size: 1rem;
}

.dashboard-section-heading p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.82rem;
}

.dashboard-library-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  flex: none;
  border: none;
  border-radius: 999px;
  padding: 0.55rem 0.85rem;
  background: var(--color-primary);
  color: #fff;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.12s ease;
}

.dashboard-library-btn svg {
  width: 0.95rem;
  height: 0.95rem;
  flex: none;
}

.dashboard-library-btn:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

.dashboard-subject-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.dashboard-subject-item {
  padding: 0.9rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-control);
}

.dashboard-subject-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.dashboard-subject-title {
  min-width: 0;
}

.dashboard-subject-title h4 {
  margin: 0 0 0.15rem;
  font-size: 0.96rem;
}

.dashboard-subject-title p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.78rem;
}

.dashboard-mastery-badge {
  flex: none;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--color-correct-border);
  border-radius: 999px;
  background: var(--color-correct-bg);
  color: var(--color-correct-strong);
  font-size: 0.72rem;
  font-weight: 700;
  white-space: nowrap;
}

.elective-badge {
  display: inline-block;
  vertical-align: middle;
  margin-left: 0.4rem;
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--color-primary);
  border-radius: 999px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-size: 0.68rem;
  font-weight: 700;
  white-space: nowrap;
}

.dashboard-subject-score {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-top: 0.8rem;
}

.dashboard-subject-score strong {
  color: var(--color-primary-dark);
  font-size: 1.25rem;
}

.dashboard-subject-score span,
.dashboard-subject-meta {
  color: var(--color-muted);
  font-size: 0.78rem;
}

.dashboard-progress-bar {
  height: 0.45rem;
  margin-top: 0.45rem;
  overflow: hidden;
  border-radius: 999px;
  background: var(--color-border);
}

.dashboard-progress-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--color-primary), #8b5cf6);
  transition: width 0.3s ease;
}

.dashboard-subject-meta {
  margin: 0.45rem 0 0;
}

.dashboard-empty {
  margin: 0;
  padding: 1.5rem 1rem;
  color: var(--color-muted);
  text-align: center;
  font-size: 0.9rem;
}

.settings-view {
  max-width: 640px;
  margin-inline: auto;
}

.settings-heading {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  margin-bottom: 1.35rem;
}

.settings-heading h2 {
  margin: 0 0 0.2rem;
}

.settings-heading p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.settings-icon {
  flex: none;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), #8b5cf6);
  color: #fff;
  box-shadow: 0 6px 14px rgba(79, 70, 229, 0.22);
}

.settings-icon svg {
  width: 1.55rem;
  height: 1.55rem;
}

.settings-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.2rem;
  box-shadow: var(--shadow-card);
}

.settings-card + .settings-card {
  margin-top: 0.75rem;
}

.schedule-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.schedule-empty {
  padding: 0.6rem 0.7rem;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.schedule-day {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow-card);
}

.schedule-day.is-today {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.18), var(--shadow-card);
}

.schedule-day-header {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}

.schedule-day-date {
  font-weight: 700;
  font-size: 1.02rem;
}

.schedule-today-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: #fff;
  background: var(--color-primary);
  border-radius: 999px;
  padding: 0.1rem 0.55rem;
}

.schedule-period-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.schedule-period {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: 0.9rem;
}

.schedule-period-time {
  flex: none;
  width: 8.5rem;
  color: var(--color-muted);
  font-size: 0.82rem;
}

.schedule-period-subject {
  font-weight: 600;
}

.schedule-period-room {
  color: var(--color-muted);
  font-size: 0.82rem;
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.settings-copy {
  min-width: 0;
}

.settings-copy h3 {
  margin: 0 0 0.2rem;
  font-size: 1rem;
}

.settings-copy p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.86rem;
}

.theme-switch {
  flex: none;
  position: relative;
  display: inline-flex;
  width: 3.35rem;
  height: 2rem;
  cursor: pointer;
}

.theme-switch input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.theme-switch-track {
  width: 100%;
  height: 100%;
  padding: 0.2rem;
  border-radius: 999px;
  background: var(--color-border);
  transition: background 0.18s ease, box-shadow 0.18s ease;
}

.theme-switch-thumb {
  display: block;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  background: var(--color-surface);
  box-shadow: 0 2px 5px rgba(30, 36, 51, 0.2);
  transition: transform 0.18s ease;
}

.theme-switch input:checked + .theme-switch-track {
  background: var(--color-primary);
}

.theme-switch input:checked + .theme-switch-track .theme-switch-thumb {
  transform: translateX(1.35rem);
}

.theme-switch input:focus-visible + .theme-switch-track {
  outline: none;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.28);
}

.settings-note {
  margin: 0.85rem 0 0;
  color: var(--color-muted);
  font-size: 0.82rem;
  text-align: center;
}

.card-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.2rem;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: inherit;
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  gap: 0.9rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

button.card:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card-hover);
}

.card-icon {
  flex: none;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-dark);
}

.card-icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.card-body {
  flex: 1;
  min-width: 0;
}

.card h3 {
  margin: 0 0 0.2rem;
  font-size: 1.02rem;
  font-weight: 700;
}

.card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.88rem;
}

.subject-card {
  cursor: default;
  align-items: flex-start;
}

.subject-group-card .card-body {
  width: 100%;
}

.subject-mode-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-top: 0.9rem;
}

.subject-mode-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
}

.subject-mode-heading {
  flex: 0 1 5rem;
  min-width: 4.2rem;
}

.subject-mode-name {
  display: block;
  font-weight: 700;
  font-size: 0.9rem;
}

.subject-mode-total {
  display: block;
  color: var(--color-muted);
  font-size: 0.76rem;
}

.subject-mode-row .subject-card-controls {
  flex: 1 1 auto;
  min-width: 0;
  margin-top: 0;
  flex-wrap: wrap;
  row-gap: 0.5rem;
}

.count-select-wrap {
  position: relative;
  flex: 1 1 6.5rem;
  min-width: 6.5rem;
}

.subject-card-controls {
  margin-top: 0.85rem;
  display: flex;
  gap: 0.5rem;
}

.subject-card-controls .count-select {
  width: 100%;
  min-width: 0;
  appearance: none;
  -webkit-appearance: none;
  padding: 0.58rem 2rem 0.58rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(99, 102, 241, 0.2);
  font: inherit;
  font-weight: 700;
  color: var(--color-text);
  background: linear-gradient(180deg, var(--color-surface), var(--color-control));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9), 0 2px 5px rgba(79, 70, 229, 0.08);
  cursor: pointer;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.count-select-wrap::after {
  content: '';
  position: absolute;
  top: 50%;
  right: 0.8rem;
  width: 0.48rem;
  height: 0.48rem;
  border-right: 2px solid var(--color-primary-dark);
  border-bottom: 2px solid var(--color-primary-dark);
  transform: translateY(-70%) rotate(45deg);
  pointer-events: none;
}

.subject-card-controls .count-select:hover {
  border-color: var(--color-primary);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9), 0 4px 10px rgba(79, 70, 229, 0.14);
}

.subject-card-controls .count-select:focus-visible {
  outline: none;
  border-color: var(--color-primary-dark);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2), 0 4px 10px rgba(79, 70, 229, 0.12);
}

.subject-card-controls .count-select:active {
  transform: translateY(1px);
}

.subject-card-controls .count-select option {
  color: var(--color-text);
  background: var(--color-surface);
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: none;
  border: none;
  color: var(--color-primary-dark);
  padding: 0;
  margin-bottom: 0.9rem;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
}

.back-btn svg {
  width: 1rem;
  height: 1rem;
  flex: none;
}

button {
  cursor: pointer;
  transition: transform 140ms var(--ease-out);
}

button:active:not(:disabled) {
  transform: scale(0.98);
}

.start-btn,
#btn-submit-text,
.btn-next,
.result-actions button {
  background: linear-gradient(120deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.6rem 1.25rem;
  font: inherit;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.start-btn,
.mastery-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

.start-btn svg,
.mastery-btn svg {
  width: 0.9rem;
  height: 0.9rem;
  flex: none;
}

.start-btn:hover,
#btn-submit-text:hover,
.btn-next:hover,
.result-actions button:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.32);
}

.subject-card-controls .start-btn,
.subject-card-controls .mastery-btn {
  flex: none;
  white-space: nowrap;
}

.mastery-btn {
  background: var(--color-correct-bg);
  color: var(--color-correct-strong);
  border: 1px solid var(--color-correct-border);
  border-radius: 999px;
  padding: 0.6rem 0.9rem;
  font: inherit;
  font-weight: 700;
  transition: transform 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}

.mastery-btn:hover {
  background: var(--color-correct-hover);
  border-color: var(--color-correct);
  transform: translateY(-1px);
}

@media (max-width: 480px) {
  .dashboard-section-heading {
    flex-direction: column;
  }

  .dashboard-library-btn {
    align-self: flex-start;
  }

  .subject-mode-row {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .subject-mode-heading {
    flex: 1 1 100%;
    min-width: 0;
  }

  .subject-mode-row .subject-card-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .subject-mode-row .count-select-wrap {
    grid-column: 1 / -1;
  }

  .subject-mode-row .subject-card-controls .start-btn,
  .subject-mode-row .subject-card-controls .mastery-btn {
    width: 100%;
    min-width: 0;
  }

  .subject-mode-row .subject-card-controls .mastery-btn {
    padding-inline: 0.5rem;
    font-size: 0.82rem;
  }
}

.start-btn:active,
.mastery-btn:active,
#btn-submit-text:active,
.btn-next:active,
.result-actions button:active {
  transform: translateY(0);
}

.quiz-toolbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 0.5rem;
}

.quiz-mode-label {
  margin-right: auto;
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--color-correct-border);
  border-radius: 999px;
  background: var(--color-correct-bg);
  color: var(--color-correct-strong);
  font-size: 0.8rem;
  font-weight: 700;
}

.quiz-mode-label[hidden] {
  display: none;
}

.btn-end-quiz {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: none;
  border: none;
  color: var(--color-muted);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.2rem 0.3rem;
  cursor: pointer;
}

.btn-end-quiz-icon {
  width: 0.9rem;
  height: 0.9rem;
  flex: none;
}

.btn-end-quiz:hover {
  color: var(--color-incorrect);
}

.quiz-progress {
  display: flex;
  justify-content: space-between;
  color: var(--color-muted);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.progress-bar {
  height: 8px;
  background: var(--color-border);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 1.1rem;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary), #8b5cf6);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.quiz-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
}

.quiz-question {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 1.2rem;
  white-space: pre-line;
}

.quiz-choices {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.choice-btn {
  background: var(--color-control);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.7rem 0.9rem;
  text-align: left;
  font: inherit;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: border-color 0.12s ease, background 0.12s ease, transform 0.12s ease;
}

.choice-btn:hover:not(:disabled) {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  transform: translateX(2px);
}

.choice-label {
  flex: none;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.choice-text {
  flex: 1;
}

.choice-btn:disabled {
  cursor: default;
}

.choice-btn.correct {
  background: var(--color-correct-bg);
  border-color: var(--color-correct);
}

.choice-btn.correct .choice-label {
  background: var(--color-correct);
  color: #fff;
}

.choice-btn.incorrect {
  background: var(--color-incorrect-bg);
  border-color: var(--color-incorrect);
}

.choice-btn.incorrect .choice-label {
  background: var(--color-incorrect);
  color: #fff;
}

.quiz-text-input-area {
  display: flex;
  gap: 0.5rem;
}

.quiz-text-input-area[hidden] {
  display: none;
}

.quiz-handwriting-area[hidden] {
  display: none;
}

.quiz-canvas {
  width: 100%;
  height: auto;
  aspect-ratio: 840 / 330;
  display: block;
  background: var(--color-control);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  touch-action: none;
  cursor: crosshair;
}

.quiz-canvas.is-erasing {
  cursor: cell;
}

.handwriting-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin-top: 0.7rem;
}

.handwriting-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  flex: 1 1 auto;
}

.handwriting-controls #btn-check-handwriting {
  flex: 0 0 auto;
  margin-left: auto;
}

.btn-tool {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  font: inherit;
  font-weight: 700;
  font-size: 0.86rem;
  box-shadow: none;
  cursor: pointer;
}

.btn-tool svg {
  width: 1rem;
  height: 1rem;
}

.btn-tool:hover:not(:disabled) {
  border-color: var(--color-primary);
}

.btn-tool.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

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

.handwriting-hint {
  margin: 0.5rem 0 0;
  font-size: 0.78rem;
  color: var(--color-muted);
}

.handwriting-answer-reveal {
  margin-top: 1.1rem;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  font-weight: 700;
}

.handwriting-answer-reveal[hidden] {
  display: none;
}

.handwriting-answer-reveal p {
  margin: 0;
}

#handwriting-correct-answer {
  color: var(--color-primary-dark);
  font-size: 1.15rem;
}

#quiz-text-input {
  flex: 1;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  font: inherit;
  background: var(--color-control);
}

#quiz-text-input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-surface);
}

.quiz-feedback {
  margin-top: 1.1rem;
  font-weight: 700;
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
}

.quiz-feedback:not([hidden]),
.quiz-explanation:not([hidden]),
.handwriting-answer-reveal:not([hidden]),
.btn-next:not([hidden]) {
  animation: surface-enter 180ms var(--ease-out) backwards;
}

.quiz-feedback.correct {
  color: var(--color-correct);
  background: var(--color-correct-bg);
}

.quiz-feedback.incorrect {
  color: var(--color-incorrect);
  background: var(--color-incorrect-bg);
}

.quiz-explanation {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.quiz-explanation-line {
  font-size: 0.92rem;
  line-height: 1.65;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
  background: var(--color-subtle-surface);
  color: var(--color-text);
}

.quiz-explanation-tag {
  display: inline-block;
  margin-right: 0.5rem;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.78rem;
  white-space: nowrap;
}

.quiz-explanation-tag.is-wrong {
  color: var(--color-incorrect);
  background: var(--color-incorrect-bg);
}

.quiz-explanation-tag.is-correct {
  color: var(--color-correct);
  background: var(--color-correct-bg);
}

.btn-next {
  margin-top: 1.1rem;
  width: 100%;
}

.result-score-ring {
  --ring-color: #6366f1;
  --ring-percent: 0;
  width: 132px;
  height: 132px;
  margin: 0.5rem auto 1rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: conic-gradient(var(--ring-color) calc(var(--ring-percent) * 3.6deg), var(--color-border) 0deg);
  transition: background 0.4s ease;
}

.result-score-ring[hidden] {
  display: none;
}

.result-score-percent {
  width: 104px;
  height: 104px;
  border-radius: 50%;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-text);
}

.result-score {
  font-size: 1.05rem;
  font-weight: 700;
  text-align: center;
  margin: 0;
}

.result-message {
  text-align: center;
  font-weight: 700;
  margin: 0.35rem 0 1.4rem;
}

.result-wrong-list h3 {
  font-size: 1rem;
  margin-bottom: 0.6rem;
}

.wrong-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-incorrect);
  border-radius: var(--radius-md);
  padding: 0.8rem 1rem;
  margin-bottom: 0.6rem;
  box-shadow: var(--shadow-card);
}

.wrong-question {
  margin: 0 0 0.25rem;
  font-weight: 700;
}

.wrong-answer {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.all-correct {
  font-weight: 700;
  color: var(--color-correct);
  text-align: center;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  animation: success-pop 360ms var(--ease-out) both;
}

.all-correct svg {
  width: 1.3rem;
  height: 1.3rem;
  flex: none;
}

.result-pending {
  color: var(--color-muted);
  text-align: center;
}

.result-actions {
  margin-top: 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.result-actions button:not(:first-child) {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: none;
}

.result-actions button:not(:first-child):hover {
  border-color: var(--color-primary);
  box-shadow: none;
}

/* ============================================================
   タブレット以上: カード一覧を複数列にして横幅を活用する
   ============================================================ */
@media (max-width: 699px) {
  .main-app .app-main-nav {
    position: fixed;
    left: 50%;
    bottom: max(0.75rem, env(safe-area-inset-bottom));
    z-index: 30;
    width: min(360px, calc(100% - 1.5rem));
    max-width: none;
    margin: 0;
    padding: 0.4rem;
    gap: 0.35rem;
    transform: translateX(-50%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 22px;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.95), rgba(124, 58, 237, 0.95));
    box-shadow: 0 12px 28px rgba(30, 36, 51, 0.24);
    backdrop-filter: blur(18px);
  }

  .main-app .app-nav-item {
    min-height: 2.6rem;
    border: none;
    border-radius: 16px;
    padding: 0.55rem 0.75rem;
  }

  .main-app .app-nav-item.is-active {
    background: rgba(255, 255, 255, 0.22);
  }

  .main-app .container {
    padding-bottom: calc(1.5rem + 5.25rem + env(safe-area-inset-bottom));
  }
}

@media (min-width: 700px) {
  .container {
    max-width: 900px;
  }

  .app-header-bar {
    max-width: 900px;
  }

  .app-main-nav {
    max-width: 900px;
  }

  #view-exam .card-list,
  #view-subject .card-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    align-items: stretch;
  }

  #view-subject .card-list {
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  }

  #view-exam .card-list .card,
  #view-subject .card-list .card {
    height: 100%;
  }
}

/* ============================================================
   PC(デスクトップ)版: 余白を活かして手書きホワイトボードなどを
   大きく表示する。スマホ版はここより上のスタイルのみ適用される。
   ============================================================ */
@media (min-width: 1024px) {
  .container {
    max-width: 1120px;
    padding: 2.5rem 2rem 3.5rem;
  }

  .app-header {
    padding: 1.7rem 2rem;
  }

  .app-header-bar {
    max-width: 1120px;
  }

  .app-main-nav {
    max-width: 1120px;
  }

  .app-header h1 {
    font-size: 1.5rem;
  }

  .app-header-icon svg {
    width: 1.7rem;
    height: 1.7rem;
  }

  .menu-panel {
    right: 2rem;
  }

  h2 {
    font-size: 1.4rem;
  }

  #view-exam .card-list,
  #view-subject .card-list {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
  }

  #view-subject .card-list {
    grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  }

  .card {
    padding: 1.4rem 1.5rem;
  }

  .card-icon {
    width: 3.5rem;
    height: 3.5rem;
  }

  .card-icon svg {
    width: 1.75rem;
    height: 1.75rem;
  }

  .card h3 {
    font-size: 1.1rem;
  }

  /* クイズ画面: 通常は読みやすい幅に収め、中央寄せにする */
  #view-quiz,
  #view-result {
    max-width: 720px;
    margin-inline: auto;
  }

  #view-quiz .quiz-card {
    padding: 2.4rem 2.8rem;
  }

  .quiz-question {
    font-size: 1.4rem;
  }

  /* 手書き式の設問は余白を使ってホワイトボードを大きく表示する */
  #view-quiz:has(.quiz-handwriting-area:not([hidden])) {
    max-width: 1100px;
  }

  #view-quiz:has(.quiz-handwriting-area:not([hidden])) .quiz-card {
    padding: 2.8rem 3.5rem;
  }

  #view-quiz:has(.quiz-handwriting-area:not([hidden])) .quiz-canvas {
    border-width: 2px;
  }

  .handwriting-controls > button {
    padding: 0.7rem 1.4rem;
    font-size: 1.02rem;
  }

  .handwriting-controls .btn-tool {
    padding: 0.55rem 1rem;
    font-size: 0.92rem;
  }

  .handwriting-controls .btn-tool svg {
    width: 1.1rem;
    height: 1.1rem;
  }
}

/* ============================================================
   確認ダイアログ(window.confirm の代わりにサイト内で完結させる)
   ============================================================ */
.confirm-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(30, 36, 51, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}

.confirm-overlay[hidden] {
  display: none;
}

.confirm-overlay:not([hidden]) .confirm-dialog {
  animation: surface-enter 180ms var(--ease-out) both;
}

.confirm-dialog {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card-hover);
  padding: 1.5rem;
  width: min(360px, 100%);
}

.confirm-message {
  margin: 0 0 1.3rem;
  font-weight: 700;
  white-space: pre-line;
  line-height: 1.5;
}

.confirm-actions {
  display: flex;
  gap: 0.6rem;
  justify-content: flex-end;
}

.confirm-btn-cancel,
.confirm-btn-ok {
  border: none;
  border-radius: 999px;
  padding: 0.6rem 1.2rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.confirm-btn-cancel {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.confirm-btn-cancel:hover {
  border-color: var(--color-primary);
}

.confirm-btn-ok {
  background: linear-gradient(120deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}

.confirm-btn-ok:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.32);
}

.quiz-image-wrap {
  margin: 0.9rem 0;
  text-align: center;
}

.quiz-image-wrap[hidden] {
  display: none;
}

.quiz-image {
  max-width: 100%;
  max-height: 320px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  cursor: zoom-in;
  background: var(--color-control);
}

.result-wrong-image {
  display: block;
  margin: 0.5rem 0;
  max-width: 100%;
  max-height: 140px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  cursor: zoom-in;
  background: var(--color-control);
}

.image-lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(10, 12, 20, 0.86);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.25rem;
}

.image-lightbox[hidden] {
  display: none;
}

.image-lightbox-img {
  max-width: 100%;
  max-height: 100%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card-hover);
}

.image-lightbox-close {
  position: absolute;
  top: 1.1rem;
  right: 1.1rem;
  width: 2.6rem;
  height: 2.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: none;
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  cursor: pointer;
}

.image-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.28);
}

.image-lightbox-close svg {
  width: 1.3rem;
  height: 1.3rem;
}

@media (prefers-reduced-motion: reduce) {
  .view.view-entering,
  .card-list > .card,
  .dashboard-subject-item,
  .menu-panel.menu-panel-entering,
  .quiz-feedback:not([hidden]),
  .quiz-explanation:not([hidden]),
  .handwriting-answer-reveal:not([hidden]),
  .btn-next:not([hidden]),
  .all-correct,
  .confirm-overlay:not([hidden]) .confirm-dialog,
  .splash-mark,
  .splash-title {
    animation-name: gentle-fade-in;
    animation-duration: 180ms;
    animation-delay: 0ms;
  }

  button:active:not(:disabled) {
    transform: scale(0.99);
  }

  .progress-bar-fill,
  .dashboard-progress-fill {
    transition-duration: 180ms;
  }
}