:root {
  --bg: #1B1D2B;
  --bg-card: #24273A;
  --bg-elevated: #2D3148;
  --border: #45496A;
  --shadow: #0F101A;
  --text: #F4F5F8;
  --text-muted: #A3A8C3;
  --teal: #5BC0BE;
  --yellow: #F5C84F;
  --coral: #F08F7A;
  --green: #4CAF6A;
  --red: #D9483B;
  --radius-lg: 20px;
  --radius-md: 14px;
  --font-ui: 'Baloo 2', system-ui, -apple-system, sans-serif;
  --font-jp: 'Noto Sans JP', sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  width: 100%;
  min-height: 100dvh;
  overflow-x: hidden;
  background-color: var(--bg);
  background-image: radial-gradient(rgba(163, 168, 195, 0.16) 1.5px, transparent 1.5px);
  background-size: 22px 22px;
  color: var(--text);
  font-family: var(--font-ui);
  line-height: 1.45;
}

.jp, ruby {
  font-family: var(--font-jp);
}

ruby rt {
  font-size: 0.62em;
  color: var(--teal);
  font-weight: 500;
}

.app-shell {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 14px 16px 36px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 4px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}

.brand-title {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--teal);
  text-shadow: 2px 2px 0 var(--shadow);
}

.brand-jp {
  font-family: var(--font-jp);
  font-size: 1.05rem;
  font-weight: 700;
  padding: 2px 10px;
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  border-radius: 999px;
  color: var(--yellow);
  box-shadow: 2px 2px 0 var(--shadow);
}

.btn {
  min-height: 44px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  border: 2px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  box-shadow: 3px 4px 0 var(--shadow);
  transition: transform 0.08s ease, box-shadow 0.08s ease;
  user-select: none;
}

.btn:active:not(:disabled) {
  transform: translate(2px, 2px);
  box-shadow: 1px 2px 0 var(--shadow);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-icon {
  min-width: 44px;
  padding: 0;
  font-size: 1.2rem;
}

.btn-teal {
  background: var(--teal);
  color: #101320;
  border-color: #101320;
}

.btn-yellow {
  background: var(--yellow);
  color: #101320;
  border-color: #101320;
}

.btn-coral {
  background: var(--coral);
  color: #101320;
  border-color: #101320;
}

.card {
  background: var(--bg-card);
  border: 2.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: 4px 5px 0 var(--shadow);
}

.home-intro {
  margin-bottom: 4px;
  color: var(--text-muted);
  font-size: 0.98rem;
}

.module-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.module-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  text-align: left;
  text-decoration: none;
  color: var(--text);
  min-height: 92px;
}

.module-card.is-active {
  border-color: var(--teal);
  cursor: pointer;
}

.module-card.is-active:active {
  transform: translate(2px, 3px);
  box-shadow: 2px 2px 0 var(--shadow);
}

.module-card.is-disabled {
  opacity: 0.68;
  cursor: default;
  pointer-events: none;
}

.module-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.module-icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-jp);
  font-size: 1.45rem;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: 2px 3px 0 var(--shadow);
}

.accent-teal { background: rgba(91, 192, 190, 0.2); color: var(--teal); border-color: var(--teal); }
.accent-yellow { background: rgba(245, 200, 79, 0.18); color: var(--yellow); border-color: var(--yellow); }
.accent-coral { background: rgba(240, 143, 122, 0.18); color: var(--coral); border-color: var(--coral); }

.module-title {
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.2;
}

.module-sub {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.badge {
  padding: 5px 11px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  border: 2px solid var(--border);
  background: var(--bg-elevated);
  white-space: nowrap;
}

.badge-ready {
  background: var(--teal);
  color: #101320;
  border-color: #101320;
}

.placeholder-box {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.modal {
  margin: auto;
  width: calc(100% - 32px);
  max-width: 400px;
  border: none;
  background: transparent;
  color: var(--text);
}

.modal::backdrop {
  background: rgba(10, 11, 18, 0.75);
}

.modal-card {
  background: var(--bg-card);
  border: 2.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: 5px 6px 0 var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title { font-size: 1.25rem; }
.modal-desc { font-size: 0.92rem; color: var(--text-muted); }
.modal-actions { display: flex; flex-direction: column; gap: 10px; }
.file-label { width: 100%; }
.backup-msg { font-size: 0.9rem; font-weight: 600; color: var(--green); }