:root {
  --surface: rgba(234, 246, 255, 0.92);
  --text-primary: #1e3a5f;
  --text-secondary: #4a6280;
  --accent: #2b9fd9;
  --accent-warm: #e8872a;
  --border: rgba(107, 130, 153, 0.28);
  --footer-h: 4.5rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  height: 100%;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text-primary);
  line-height: 1.55;
  background: linear-gradient(180deg, #9bd4ff 0%, #e6f5ff 100%);
}

body.guide-infinite {
  --accent: #2b9fd9;
}

body.guide-daily {
  --accent: #e8872a;
}

.guide {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100dvh;
  height: 100vh;
  overflow: hidden;
}

.nav-arrow {
  position: absolute;
  top: 50%;
  z-index: 20;
  transform: translateY(calc(-50% - 2.25rem));
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--text-primary);
  box-shadow: 0 6px 18px rgba(30, 58, 95, 0.14);
  cursor: pointer;
  backdrop-filter: blur(6px);
  -webkit-tap-highlight-color: transparent;
}

.nav-arrow:active:not(:disabled) {
  transform: translateY(calc(-50% - 2.25rem)) scale(0.94);
}

.nav-arrow:disabled {
  opacity: 0.28;
  cursor: default;
}

.nav-prev {
  left: calc(env(safe-area-inset-left, 0px) + 0.55rem);
}

.nav-next {
  right: calc(env(safe-area-inset-right, 0px) + 0.55rem);
}

.nav-next svg {
  transform: scaleX(-1);
}

.carousel-viewport {
  flex: 1;
  min-height: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.carousel-viewport::-webkit-scrollbar {
  display: none;
}

.carousel-track {
  display: flex;
  height: 100%;
}

.slide {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding:
    calc(env(safe-area-inset-top, 0px) + 1.25rem)
    calc(env(safe-area-inset-right, 0px) + 1.35rem)
    calc(env(safe-area-inset-bottom, 0px) + 0.75rem)
    calc(env(safe-area-inset-left, 0px) + 1.35rem);
}

.slide-inner {
  width: 100%;
  max-height: 100%;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.slide-inner::-webkit-scrollbar {
  display: none;
}

.mode-badge {
  display: inline-block;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}

.mode-badge.infinite {
  background: rgba(43, 159, 217, 0.2);
  color: #1878a8;
}

.mode-badge.daily {
  background: rgba(232, 135, 42, 0.22);
  color: #b86512;
}

h1 {
  font-size: clamp(1.45rem, 6vw, 1.85rem);
  letter-spacing: -0.03em;
  margin-bottom: 0.55rem;
  line-height: 1.25;
}

h2 {
  font-size: clamp(1.2rem, 5vw, 1.45rem);
  letter-spacing: -0.02em;
  margin-bottom: 0.65rem;
  color: var(--accent);
  line-height: 1.3;
}

.rule-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 0.5rem;
}

.rule-block {
  padding: 1rem 1.05rem;
  border-radius: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(30, 58, 95, 0.08);
}

.keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.55rem;
}

.keyword {
  display: inline-block;
  padding: 0.28rem 0.62rem;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(43, 159, 217, 0.22);
  color: var(--accent);
  font-size: clamp(0.78rem, 3.2vw, 0.88rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.3;
}

body.guide-daily .keyword {
  border-color: rgba(232, 135, 42, 0.28);
}

.desc {
  color: var(--text-secondary);
  font-size: clamp(0.9rem, 3.6vw, 0.98rem);
  line-height: 1.55;
}

p,
li {
  color: var(--text-secondary);
  font-size: clamp(0.9rem, 3.6vw, 0.98rem);
}

p + p {
  margin-top: 0.6rem;
}

ul,
ol {
  margin-top: 0.55rem;
  padding-left: 1.15rem;
}

li + li {
  margin-top: 0.35rem;
}

.card-list {
  list-style: none;
  padding-left: 0;
  margin-top: 0.75rem;
}

.card-list li {
  padding: 0.8rem 0.95rem;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(30, 58, 95, 0.08);
}

.card-list li + li {
  margin-top: 0.55rem;
}

.card-list strong {
  display: block;
  color: var(--text-primary);
  font-size: 0.92rem;
  margin-bottom: 0.15rem;
}

.stat-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
  margin-top: 0.75rem;
}

.stat {
  padding: 0.75rem 0.85rem;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  text-align: center;
}

.stat strong {
  display: block;
  font-size: 1.1rem;
  color: var(--accent);
  margin-bottom: 0.2rem;
}

.stat span {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.35;
}

.note {
  margin-top: 0.85rem;
  padding: 0.8rem 0.95rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.note strong {
  color: var(--text-primary);
}

.carousel-footer {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.55rem;
  padding:
    0.65rem 1rem
    calc(env(safe-area-inset-bottom, 0px) + 0.85rem);
  background: rgba(255, 255, 255, 0.35);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
}

.dot {
  width: 8px;
  height: 8px;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: rgba(30, 58, 95, 0.22);
  cursor: pointer;
  transition: width 0.2s ease, background 0.2s ease;
}

.dot[aria-current="true"] {
  width: 22px;
  background: var(--accent);
}

.hint {
  font-size: 0.78rem;
  color: var(--text-secondary);
  opacity: 0.85;
}

@media (max-width: 360px) {
  .nav-arrow {
    width: 2.15rem;
    height: 2.15rem;
  }

  .nav-arrow svg {
    width: 18px;
    height: 18px;
  }
}