:root {
  --font-display: "Sora", "Noto Sans JP", "Noto Sans KR", "Noto Sans SC", sans-serif;
  --font-body: "Manrope", "Noto Sans JP", "Noto Sans KR", "Noto Sans SC", sans-serif;
  --font-accent: "Space Grotesk", "Noto Sans JP", "Noto Sans KR", "Noto Sans SC", sans-serif;

  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 30px;
  --radius-full: 999px;

  --space-xs: 0.45rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.4rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;
}

body[data-theme="wish"] {
  --primary: #e50914;
  --primary-light: #ff6b74;
  --primary-dark: #b20710;
  --secondary: #f5f5f1;
  --secondary-light: #ffffff;
  --secondary-dark: #b3b3b3;
  --accent: #6d6d6e;
  --accent-light: #e5e5e5;
  --accent-dark: #221f1f;
  --gold: #8f1720;
  --gold-light: #f5f5f1;
  --success: #46d369;
  --warning: #ffb156;
  --bg-main: #141414;
  --bg-alt: #1b1b1b;
  --bg-gradient: linear-gradient(135deg, #090909 0%, #141414 48%, #1c1c1c 100%);
  --card-bg: rgba(24, 24, 24, 0.94);
  --card-bg-soft: rgba(255, 255, 255, 0.06);
  --card-bg-strong: rgba(255, 255, 255, 0.11);
  --surface-glow: rgba(229, 9, 20, 0.14);
  --border: rgba(255, 255, 255, 0.14);
  --border-strong: rgba(255, 255, 255, 0.24);
  --shadow: 0 22px 48px rgba(0, 0, 0, 0.48);
  --text-dark: #ffffff;
  --text-medium: #ececec;
  --text-light: #c9c9c9;
  --text-faint: #9f9f9f;
  --topic-container: 1120px;
  --shell-header: 1380px;
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
}

body.topic-hub {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--text-dark);
  background: var(--bg-main);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.topic-hub::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    var(--bg-gradient),
    radial-gradient(circle at 18% 16%, rgba(229, 9, 20, 0.16) 0%, transparent 36%),
    radial-gradient(circle at 82% 14%, rgba(255, 255, 255, 0.06) 0%, transparent 28%),
    radial-gradient(circle at 54% 72%, rgba(178, 7, 16, 0.12) 0%, transparent 38%),
    radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.04) 0%, transparent 24%);
  pointer-events: none;
  z-index: -2;
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--secondary-light);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button,
input,
textarea,
select {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--secondary-light);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 1000;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  background: #fff;
  color: #111;
}

.progress-bar {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 100;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-dark), var(--primary), var(--secondary-dark));
}

.site-glow {
  position: fixed;
  width: 26rem;
  height: 26rem;
  border-radius: 50%;
  filter: blur(84px);
  opacity: 0.34;
  pointer-events: none;
  z-index: -1;
}

.site-glow--left {
  top: -7rem;
  left: -9rem;
  background: rgba(229, 9, 20, 0.22);
}

.site-glow--right {
  top: 2rem;
  right: -10rem;
  background: rgba(255, 255, 255, 0.08);
}

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 10, 0.82);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
  transition: box-shadow var(--transition-normal), background var(--transition-normal);
}

.header.scrolled {
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.24);
  background: rgba(10, 10, 10, 0.94);
}

.header-inner {
  width: min(calc(100% - 2rem), var(--shell-header));
  margin: 0 auto;
  padding: 0.9rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--text-dark);
}

.brand span {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--secondary-light);
  text-shadow: 0 0 18px rgba(229, 9, 20, 0.18);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-left: auto;
  flex: 1 1 30rem;
  min-width: 0;
  justify-content: flex-end;
}

.locale-switcher {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  flex: 0 0 auto;
}

.locale-switcher__label {
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 700;
}

.locale-switcher__select {
  min-height: 2.5rem;
  min-width: 9.5rem;
  padding: 0.45rem 2.25rem 0.45rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background:
    linear-gradient(45deg, transparent 50%, var(--primary-light) 50%) calc(100% - 1.05rem) 1rem / 0.34rem 0.34rem no-repeat,
    linear-gradient(135deg, var(--primary-light) 50%, transparent 50%) calc(100% - 0.78rem) 1rem / 0.34rem 0.34rem no-repeat,
    rgba(255, 255, 255, 0.08);
  color: var(--text-dark);
  font-weight: 700;
  appearance: none;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  color: var(--text-medium);
  font-weight: 700;
  font-size: 0.93rem;
  border: 1px solid transparent;
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  text-decoration: none;
  color: var(--text-dark);
  background: rgba(229, 9, 20, 0.18);
  border-color: rgba(229, 9, 20, 0.3);
}

.menu-toggle {
  display: none;
  margin-left: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card-bg-soft);
  color: var(--text-dark);
  padding: 0.55rem 0.85rem;
}

.topic-main {
  width: min(calc(100% - 2rem), var(--topic-container));
  margin: 0 auto;
  padding: 1.4rem 0 4rem;
}

.breadcrumb {
  font-size: 0.94rem;
  color: var(--text-light);
  margin-bottom: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.breadcrumb a {
  color: var(--primary-light);
}

.topic-surface {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.025) 100%),
    var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.topic-hero,
.topic-section {
  margin-top: 1.4rem;
}

.topic-hero {
  padding: 2rem;
}

.topic-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(310px, 0.95fr);
  gap: 1.3rem;
  margin-top: 1rem;
}

.topic-eyebrow,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.38rem 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(229, 9, 20, 0.14);
  color: var(--secondary-light);
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.topic-title {
  margin: 1rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 5vw, 3.45rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
  color: var(--text-dark);
}

.topic-lead,
.hero-lead {
  margin: 1rem 0 0;
  color: var(--text-medium);
  font-size: 1.05rem;
}

.topic-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.36rem 0.72rem;
  border-radius: var(--radius-full);
  background: rgba(229, 9, 20, 0.12);
  border: 1px solid rgba(229, 9, 20, 0.24);
  color: var(--secondary-light);
  font-size: 0.88rem;
  font-weight: 700;
}

.topic-quick-answer {
  padding: 1.15rem;
  border-radius: var(--radius-md);
  background:
    linear-gradient(135deg, rgba(229, 9, 20, 0.12) 0%, rgba(255, 255, 255, 0.05) 100%);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.topic-quick-answer h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--text-dark);
}

.quick-take {
  display: grid;
  gap: 0.8rem;
}

.quick-take__card {
  padding: 0.95rem 1rem;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.quick-take__card p {
  margin: 0;
  color: var(--text-medium);
}

.quick-take__label {
  margin-bottom: 0.45rem !important;
  color: var(--primary-light) !important;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.topic-card-actions,
.button-row,
.stack-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.topic-card-actions {
  margin-top: 1.1rem;
}

.topic-button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.72rem 1.05rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.topic-button,
.button--primary {
  color: var(--secondary-light);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  box-shadow: 0 12px 26px rgba(229, 9, 20, 0.22);
}

.topic-button.alt,
.button--secondary {
  background: rgba(255, 255, 255, 0.07);
  color: var(--secondary-light);
  border-color: rgba(255, 255, 255, 0.16);
}

.button--ghost {
  background: transparent;
  color: var(--text-dark);
  border-color: var(--border);
}

.topic-button:hover,
.button:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.topic-section {
  padding: 1.8rem;
}

.section--accent {
  background:
    linear-gradient(180deg, rgba(229, 9, 20, 0.11), rgba(255, 255, 255, 0.03)),
    var(--card-bg);
  border-color: rgba(229, 9, 20, 0.24);
}

.section--soft {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)),
    var(--card-bg);
}

.section--warn {
  background:
    linear-gradient(180deg, rgba(255, 177, 86, 0.12), rgba(255, 255, 255, 0.03)),
    var(--card-bg);
  border-color: rgba(255, 177, 86, 0.24);
}

.section--dark {
  background:
    linear-gradient(180deg, rgba(7, 7, 7, 0.96), rgba(18, 18, 18, 0.96)),
    var(--card-bg);
}

.section-heading {
  margin-bottom: 1rem;
}

.section-heading h2 {
  margin: 0.75rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.2vw, 2.35rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--text-dark);
}

.section-heading .eyebrow {
  padding-left: 0;
  padding-right: 0;
  background: transparent;
}

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

.topic-card,
.fact-card,
.faq-card,
.callout,
.quote-box,
.wish-card,
.timer-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.topic-card,
.fact-card,
.callout,
.quote-box,
.timer-card,
.wish-card {
  padding: 1.1rem;
}

.topic-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.topic-card h3,
.callout h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--text-dark);
}

.topic-card p,
.callout p,
.quote-box,
.fact-card p,
.wish-card p,
.faq-card__body p {
  margin: 0;
  color: var(--text-medium);
}

.tag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 0.34rem 0.68rem;
  border-radius: var(--radius-full);
  background: rgba(229, 9, 20, 0.12);
  border: 1px solid rgba(229, 9, 20, 0.24);
  color: var(--secondary-light);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.text-link {
  margin-top: auto;
  color: var(--primary-light);
  font-weight: 800;
}

.fact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.fact-card__label {
  color: var(--text-faint) !important;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.fact-card__value {
  margin-top: 0.35rem !important;
  font-family: var(--font-display);
  font-size: 1.42rem;
  line-height: 1.1;
  color: var(--text-dark) !important;
}

.microcopy {
  color: var(--text-light);
  font-size: 0.92rem;
}

.search-shell {
  margin-bottom: 1rem;
}

.search-shell__label,
.field label {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--text-medium);
  font-family: var(--font-accent);
  font-weight: 800;
}

.search-shell input,
.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 0.88rem 0.95rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.18);
  color: var(--text-dark);
}

.search-shell input::placeholder,
.field input::placeholder,
.field textarea::placeholder {
  color: var(--text-faint);
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field textarea {
  min-height: 8rem;
  resize: vertical;
}

.split-copy,
.tool-shell,
.comparison-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.95fr);
  gap: 1rem;
}

.comparison-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.timer-card {
  display: grid;
  gap: 0.8rem;
}

.timer-display {
  margin: 0 !important;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.7rem);
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--secondary-light);
}

.quote-box {
  border-left: 4px solid var(--primary);
}

.divider {
  height: 1px;
  margin: 1.2rem 0;
  background: var(--border);
}

.checklist {
  display: grid;
  gap: 0.75rem;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 0.95rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-medium);
}

.check-item input {
  margin-top: 0.18rem;
}

.meter {
  margin-top: 1rem;
}

.meter__bar {
  width: 100%;
  height: 14px;
  border-radius: var(--radius-full);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.1);
}

.meter__bar span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--primary-dark), var(--primary), var(--success));
}

.form-shell {
  display: grid;
  gap: 1rem;
}

.wish-list {
  display: grid;
  gap: 0.85rem;
}

.wish-card {
  background: linear-gradient(180deg, rgba(229, 9, 20, 0.08), rgba(255, 255, 255, 0.04));
}

.wish-card__meta {
  margin-bottom: 0.45rem;
  color: var(--text-light);
  font-size: 0.88rem;
}

.wish-card h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.08rem;
  color: var(--text-dark);
}

.faq-list {
  display: grid;
  gap: 0.8rem;
}

.faq-card summary {
  cursor: pointer;
  padding: 1rem 1.1rem;
  list-style: none;
  color: var(--text-dark);
  font-family: var(--font-accent);
  font-weight: 800;
}

.faq-card summary::-webkit-details-marker {
  display: none;
}

.faq-card__body {
  padding: 0 1.1rem 1rem;
}

.callout {
  margin-top: 1rem;
}

.callout--warn {
  background: rgba(255, 177, 86, 0.08);
  border-color: rgba(255, 177, 86, 0.22);
}

.source-list {
  display: grid;
  gap: 0.7rem;
  margin: 0;
  padding-left: 1.2rem;
}

.source-list li {
  color: var(--text-medium);
}

.route-map {
  margin: 0;
}

.route-map img {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
}

.route-map figcaption {
  margin-top: 0.75rem;
}

.spoiler-block {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  filter: blur(10px);
  opacity: 0.55;
  user-select: none;
  transition: filter var(--transition-normal), opacity var(--transition-normal);
}

.spoiler-block.is-visible {
  filter: none;
  opacity: 1;
  user-select: text;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.4);
}

.footer-content,
.footer-grid {
  width: min(calc(100% - 2rem), var(--topic-container));
  margin: 0 auto;
  padding: 2rem 0 5rem;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 1rem;
}

.footer-title {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  color: var(--text-dark);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-medium);
}

.floating-actions {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 60;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: flex-end;
}

ul,
ol {
  margin: 0;
  padding-left: 1.15rem;
}

li {
  color: var(--text-medium);
  margin: 0.4rem 0;
}

p {
  margin: 0;
}

p + p {
  margin-top: 0.85rem;
}

[hidden] {
  display: none !important;
}

@media (max-width: 920px) {
  .topic-hero-grid,
  .split-copy,
  .tool-shell,
  .comparison-grid,
  .fact-grid,
  .footer-grid,
  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .locale-switcher {
    order: 2;
    margin-left: auto;
  }

  .site-nav {
    order: 4;
    display: none;
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: calc(100% + 0.4rem);
    padding: 0.8rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: rgba(12, 12, 12, 0.96);
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    justify-content: center;
  }

  .menu-toggle {
    display: inline-flex;
    order: 3;
  }
}

@media (max-width: 640px) {
  .topic-main,
  .header-inner,
  .footer-grid,
  .footer-content {
    width: min(calc(100% - 1.2rem), var(--topic-container));
  }

  .topic-hero,
  .topic-section {
    padding: 1.2rem;
  }

  .topic-title {
    font-size: 1.95rem;
  }

  .locale-switcher {
    order: 2;
    width: 100%;
    justify-content: space-between;
  }

  .locale-switcher__select {
    flex: 1 1 auto;
  }

  .floating-actions {
    left: 1rem;
    right: 1rem;
  }

  .floating-actions .button {
    flex: 1 1 11rem;
  }
}

@media print {
  .header,
  .floating-actions,
  .progress-bar,
  .menu-toggle,
  .topic-card-actions,
  .button-row,
  .site-glow {
    display: none !important;
  }

  body.topic-hub {
    background: #fff;
    color: #111;
  }

  body.topic-hub::before {
    display: none;
  }

  .topic-surface,
  .topic-card,
  .fact-card,
  .callout,
  .quote-box,
  .wish-card,
  .quick-take__card,
  .topic-quick-answer {
    background: #fff;
    color: #111;
    border-color: #d8d8d8;
    box-shadow: none;
  }
}