:root {
  --bg: #fff7f6;
  --bg-deep: #ffe8e5;
  --ink: #1a0b0b;
  --ink-soft: #5c3030;
  --muted: #8a5555;
  --line: rgba(176, 32, 40, 0.18);
  --red: #d0122a;
  --red-deep: #9e0c1d;
  --red-soft: #ff5a6a;
  --white: #ffffff;
  --panel: rgba(255, 255, 255, 0.82);
  --shadow: 0 22px 50px rgba(120, 16, 28, 0.12);
  --radius: 18px;
  --font-display: "Bricolage Grotesque", Georgia, serif;
  --font-serif: "Source Serif 4", Georgia, serif;
  --font-sans: "Sora", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-sans);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(208, 18, 42, 0.16), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(255, 90, 106, 0.14), transparent 50%),
    linear-gradient(180deg, var(--bg) 0%, var(--white) 42%, var(--bg-deep) 100%);
}

a {
  color: var(--red-deep);
}

img {
  max-width: 100%;
}

.shell {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--red);
  color: var(--white);
  padding: 0.6rem 0.9rem;
  z-index: 50;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.site-header {
  padding: 1rem 0 0.35rem;
  border-bottom: 1px solid transparent;
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: inherit;
}

.brand__mark {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 4px;
  background: linear-gradient(145deg, var(--red-soft), var(--red-deep));
  box-shadow: 0 0 0 3px rgba(208, 18, 42, 0.12);
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--muted);
}

.lang-switch select {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  padding: 0.35rem 0.55rem;
  font: inherit;
  color: var(--ink);
}

.header-meta {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.live-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 0 0 rgba(208, 18, 42, 0.45);
  animation: pulse 1.8s ease-out infinite;
}

@keyframes pulse {
  70% {
    box-shadow: 0 0 0 10px rgba(208, 18, 42, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(208, 18, 42, 0);
  }
}

.geo-note {
  margin: 0.45rem auto 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.hero {
  padding: 1.6rem 0 1.2rem;
}

.hero__stage {
  display: grid;
  grid-template-columns: 1.35fr 0.9fr;
  gap: 1.4rem;
  align-items: start;
}

.eyebrow {
  margin: 0 0 0.55rem;
  color: var(--red);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.brand-lockup {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 4.6rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
  color: var(--red-deep);
}

.hero__lede {
  margin: 0 0 1.25rem;
  max-width: 38rem;
  color: var(--ink-soft);
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  line-height: 1.45;
}

.code-stack {
  display: grid;
  gap: 0.85rem;
}

.code-stack--duo {
  max-width: 36rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.code-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
  padding: 1.05rem 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.code-card--accent {
  background: linear-gradient(160deg, #fff 0%, #ffe4e6 100%);
  border-color: rgba(208, 18, 42, 0.28);
}

.code-card__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.4rem;
}

.code-card__label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
}

.code-card__badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--red);
  color: var(--white);
  font-size: 0.72rem;
  font-weight: 600;
  white-space: nowrap;
}

.code-card__value {
  margin: 0.15rem 0;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.4vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
  white-space: nowrap;
}

.code-card__meta {
  margin: 0 0 0.55rem;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.35;
  min-height: 2.4em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 0;
  border-radius: 999px;
  padding: 0.72rem 1.05rem;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary,
.copy-btn {
  width: 100%;
  background: var(--red);
  color: var(--white);
}

.btn--primary:hover,
.copy-btn:hover {
  background: var(--red-deep);
}

.copy-btn.is-copied {
  background: #178a4a;
}

.btn--ghost {
  background: var(--white);
  color: var(--red-deep);
  border: 1px solid var(--line);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem 1.1rem;
  margin-top: 1.15rem;
}

.text-link {
  color: var(--red-deep);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(158, 12, 29, 0.35);
}

.heart-bonus {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 10.5rem;
  padding: 0.85rem 1.25rem;
  border-radius: 999px;
  background: linear-gradient(145deg, #ff3b54, #c40d22);
  color: var(--white);
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 12px 28px rgba(196, 13, 34, 0.35);
  animation: heartbeat 1.15s ease-in-out infinite;
}

.heart-bonus::before {
  content: "♥";
  margin-right: 0.4rem;
  font-size: 1rem;
}

@keyframes heartbeat {
  0%,
  100% {
    transform: scale(1);
  }
  14% {
    transform: scale(1.08);
  }
  28% {
    transform: scale(1);
  }
  42% {
    transform: scale(1.1);
  }
  70% {
    transform: scale(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .heart-bonus,
  .live-dot {
    animation: none;
  }
}

.hero__panel {
  padding: 1.25rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.95), rgba(255, 232, 229, 0.9));
  box-shadow: var(--shadow);
}

.hero__panel h2 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.geo-cite {
  margin: 0 0 0.85rem;
  color: var(--ink-soft);
  font-family: var(--font-serif);
  line-height: 1.5;
}

.plain-list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--ink-soft);
  line-height: 1.55;
}

.compare-band {
  padding: 0.5rem 0 2rem;
}

.section-head {
  margin-bottom: 1.1rem;
}

.section-head h2 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  letter-spacing: -0.04em;
}

.section-head p:last-child {
  margin: 0;
  max-width: 42rem;
  color: var(--ink-soft);
  font-family: var(--font-serif);
}

.chart {
  padding: 1.2rem 1.15rem 1.3rem;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  background: var(--white);
  box-shadow: var(--shadow);
}

.chart__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.2rem;
  margin-bottom: 1rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.swatch {
  display: inline-block;
  width: 0.75rem;
  height: 0.75rem;
  margin-right: 0.35rem;
  border-radius: 2px;
  vertical-align: -1px;
}

.swatch--redot {
  background: var(--red);
}

.swatch--kast {
  background: #f0a500;
}

.swatch--rev {
  background: #4b5d78;
}

.chart__row {
  display: grid;
  grid-template-columns: minmax(8rem, 12rem) 1fr;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 0.85rem;
}

.chart__label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.chart__bars {
  display: grid;
  gap: 0.28rem;
}

.bar {
  position: relative;
  height: 0.72rem;
  width: var(--v);
  border-radius: 999px;
  transition: width 0.6s ease;
}

.bar span {
  position: absolute;
  right: -1.7rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.72rem;
  color: var(--muted);
  font-weight: 600;
}

.bar--redot {
  background: linear-gradient(90deg, var(--red-soft), var(--red));
}

.bar--kast {
  background: linear-gradient(90deg, #ffd27a, #f0a500);
}

.bar--rev {
  background: linear-gradient(90deg, #9aa8bc, #4b5d78);
}

.bar.is-best {
  box-shadow: 0 0 0 2px rgba(208, 18, 42, 0.18);
}

.advantage-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr 1fr;
  gap: 0.9rem;
  margin-top: 1rem;
}

.advantage {
  padding: 1rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
}

.advantage--win {
  background: linear-gradient(160deg, #fff, #ffe8ea);
  border-color: rgba(208, 18, 42, 0.28);
}

.advantage h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.advantage p,
.advantage ul {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.94rem;
  line-height: 1.5;
}

.advantage ul {
  padding-left: 1.1rem;
}

.chart-note {
  margin: 0.85rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.seo-layer {
  padding: 0.25rem 0 2.5rem;
}

.answer-block {
  margin-bottom: 1.1rem;
  padding: 1.2rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.7);
}

.answer-block h2,
.seo-block h2 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  letter-spacing: -0.03em;
}

.seo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.95rem;
  margin-bottom: 1rem;
}

.seo-block {
  padding: 1.15rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
}

.steps {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

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

.steps strong {
  display: block;
  color: var(--ink);
  margin-bottom: 0.15rem;
}

.faq-list details {
  border-top: 1px solid var(--line);
  padding: 0.75rem 0;
}

.faq-list details:first-child {
  border-top: 0;
  padding-top: 0;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
}

.faq-list p {
  margin: 0.55rem 0 0;
  color: var(--ink-soft);
  line-height: 1.5;
}

.site-footer {
  padding: 1.4rem 0 2.2rem;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
}

.footer-row {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.2rem;
  align-items: start;
}

.footer-brand {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--red-deep);
}

.footer-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
  max-width: 36rem;
}

.footer-row nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.95rem;
  justify-content: flex-end;
}

.footer-row nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.9rem;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.25rem;
  transform: translateX(-50%) translateY(120%);
  padding: 0.7rem 1rem;
  border-radius: 999px;
  background: var(--ink);
  color: var(--white);
  font-size: 0.9rem;
  opacity: 0;
  transition: 0.25s ease;
  z-index: 40;
}

.toast.is-on {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 900px) {
  .hero__stage,
  .seo-grid,
  .advantage-grid,
  .footer-row,
  .chart__row {
    grid-template-columns: 1fr;
  }

  .code-stack--duo {
    grid-template-columns: 1fr;
    max-width: 28rem;
  }

  .footer-row nav {
    justify-content: flex-start;
  }

  .bar span {
    right: 0.4rem;
    color: var(--white);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
  }

  .bar--kast span,
  .bar--rev span {
    color: var(--ink);
    text-shadow: none;
  }
}