/* ===== Design tokens ===== */
:root {
  --color-primary: #1f8a70;
  --color-primary-dark: #176652;
  --color-primary-light: #2da585;
  --color-accent: #a7f3d0;
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-surface-alt: #f8fafc;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-text: #0f172a;
  --color-text-muted: #475569;
  --color-text-subtle: #64748b;
  --color-code-bg: #0f172a;
  --color-code-text: #e2e8f0;
  --color-danger: #dc2626;
  --color-warning: #d97706;
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --container: 1200px;
  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", Roboto, Helvetica,
    Arial, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Menlo, Monaco, Consolas,
    "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0b1220;
    --color-surface: #0f172a;
    --color-surface-alt: #111c30;
    --color-border: #1f2a44;
    --color-border-strong: #334155;
    --color-text: #f1f5f9;
    --color-text-muted: #cbd5e1;
    --color-text-subtle: #94a3b8;
    --color-code-bg: #020617;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  }
}

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

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  cursor: pointer;
  border: 0;
  background: transparent;
  color: inherit;
}

/* ===== Utilities ===== */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.section {
  padding: var(--space-9) 0;
}

.section--tight {
  padding: var(--space-7) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-7);
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.section-header__title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: var(--space-3);
}

.section-header__subtitle {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
  line-height: 1.7;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  max-width: var(--container);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}

.brand__mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__link {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color var(--transition), background var(--transition);
}

.nav__link:hover {
  color: var(--color-text);
  background: var(--color-surface-alt);
}

.nav__divider {
  width: 1px;
  height: 20px;
  background: var(--color-border);
  margin: 0 var(--space-2);
}

.lang-toggle {
  display: inline-flex;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 2px;
}

.lang-toggle__btn {
  padding: 4px 10px;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: 999px;
  color: var(--color-text-subtle);
  transition: color var(--transition), background var(--transition);
  min-width: 36px;
}

.lang-toggle__btn.is-active {
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.lang-toggle__btn:not(.is-active):hover {
  color: var(--color-text);
}

.menu-toggle {
  display: none;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--color-text);
}

.menu-toggle:hover {
  background: var(--color-surface-alt);
}

@media (max-width: 768px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-3);
  }

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

  .nav__link {
    padding: var(--space-3);
  }

  .nav__divider {
    display: none;
  }

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

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: clamp(4rem, 10vw, 7rem) 0 clamp(3rem, 8vw, 5rem);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
      ellipse 80% 60% at 50% 0%,
      color-mix(in srgb, var(--color-primary) 18%, transparent) 0%,
      transparent 60%
    ),
    radial-gradient(
      ellipse 60% 40% at 80% 20%,
      color-mix(in srgb, var(--color-accent) 22%, transparent) 0%,
      transparent 70%
    );
  pointer-events: none;
  z-index: -1;
}

.hero__inner {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 12px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  background: color-mix(in srgb, var(--color-primary) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-primary) 30%, transparent);
  border-radius: 999px;
  margin-bottom: var(--space-5);
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: var(--space-5);
}

.hero__title em {
  font-style: normal;
  color: var(--color-primary);
}

.hero__subtitle {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.hero__desc {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-6);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.availability-notice {
  color: var(--color-text);
  background: color-mix(in srgb, var(--color-warning) 10%, var(--color-surface));
  border: 1px solid color-mix(in srgb, var(--color-warning) 35%, var(--color-border));
  border-left: 4px solid var(--color-warning);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  line-height: 1.7;
}

.availability-notice--hero {
  max-width: 720px;
  margin: calc(-1 * var(--space-3)) auto var(--space-5);
  text-align: left;
}

.availability-notice--section {
  max-width: 760px;
  margin: 0 auto;
}

.hero__cta {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 12px 22px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: transform var(--transition), background var(--transition),
    color var(--transition), border-color var(--transition),
    box-shadow var(--transition);
  white-space: nowrap;
}

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

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-lg);
}

.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--secondary:hover {
  background: var(--color-surface-alt);
  border-color: var(--color-border-strong);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: transparent;
}

.btn--ghost:hover {
  color: var(--color-text);
  background: var(--color-surface-alt);
}

.btn--small {
  padding: 6px 12px;
  font-size: 0.8125rem;
}

/* ===== Highlights ===== */
.highlights {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-7);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.highlight {
  text-align: center;
  padding: var(--space-3) var(--space-2);
  border-right: 1px solid var(--color-border);
}

.highlight:last-child {
  border-right: 0;
}

.highlight__value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.highlight__label {
  font-size: 0.8125rem;
  color: var(--color-text-subtle);
  margin-top: var(--space-1);
  font-weight: 500;
}

@media (max-width: 768px) {
  .highlights {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
  }
  .highlight {
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-3) var(--space-2);
  }
  .highlight:nth-last-child(-n+2) {
    border-bottom: 0;
  }
}

/* ===== Features ===== */
.features {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 360px), 1fr));
  gap: var(--space-5);
}

.feature-category {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}

.feature-category:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--color-primary) 40%, var(--color-border));
}

.feature-category__header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.feature-category__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-primary) 14%, transparent);
  color: var(--color-primary);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.feature-category__icon svg {
  width: 22px;
  height: 22px;
}

.feature-category__title {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-1);
}

.feature-category__count {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 12%, transparent);
  padding: 2px 8px;
  border-radius: 999px;
}

.feature-category__desc {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.feature-list__item {
  padding-left: var(--space-4);
  position: relative;
}

.feature-list__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
}

.feature-list__name {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-text);
  margin-bottom: 2px;
}

.feature-list__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* ===== Architecture ===== */
.arch {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-6);
  align-items: start;
}

.arch__diagram {
  min-width: 0;
  background: var(--color-code-bg);
  color: var(--color-code-text);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  overflow-x: auto;
  box-shadow: var(--shadow-md);
}

.arch__diagram pre {
  white-space: pre;
  margin: 0;
}

.arch__points {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.arch-point {
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary);
}

.arch-point__title {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: var(--space-1);
}

.arch-point__desc {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

@media (max-width: 880px) {
  .arch {
    grid-template-columns: 1fr;
  }
}

/* ===== Getting Started ===== */
.steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  max-width: 880px;
  margin: 0 auto;
}

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  align-items: start;
}

.step__num {
  width: 48px;
  height: 48px;
  background: color-mix(in srgb, var(--color-primary) 12%, transparent);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.step__body {
  min-width: 0;
}

.step__title {
  font-weight: 700;
  font-size: 1.0625rem;
  margin-bottom: var(--space-3);
}

.step__note {
  margin-top: var(--space-2);
  font-size: 0.875rem;
  color: var(--color-text-subtle);
}

.code-block {
  position: relative;
  background: var(--color-code-bg);
  color: var(--color-code-text);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  overflow: hidden;
}

.code-block__inner {
  display: flex;
  align-items: stretch;
}

.code-block pre {
  flex: 1;
  padding: var(--space-4);
  overflow-x: auto;
  white-space: pre;
  margin: 0;
}

.code-block__copy {
  padding: var(--space-3) var(--space-4);
  background: transparent;
  color: var(--color-code-text);
  border-left: 1px solid color-mix(in srgb, #ffffff 10%, transparent);
  font-size: 0.8125rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  opacity: 0.7;
  transition: opacity var(--transition);
  white-space: nowrap;
}

.code-block__copy:hover {
  opacity: 1;
}

.code-block__copy.is-copied {
  color: var(--color-accent);
  opacity: 1;
}

@media (max-width: 540px) {
  .step {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

.initial-setup {
  margin-top: var(--space-7);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.initial-setup__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.checklist {
  list-style: none;
  counter-reset: checklist;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.checklist__item {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  padding-left: 0;
  position: relative;
  counter-increment: checklist;
}

.checklist__item::before {
  content: counter(checklist);
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background: color-mix(in srgb, var(--color-primary) 14%, transparent);
  color: var(--color-primary);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 700;
}

.checklist__text {
  color: var(--color-text-muted);
  line-height: 1.6;
  padding-top: 2px;
}

/* ===== Safety ===== */
.safety {
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.safety__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: var(--space-3);
}

.safety-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  align-items: flex-start;
}

.safety-item__icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--color-warning);
}

.safety-item__text {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* ===== Footer ===== */
.site-footer {
  padding: var(--space-7) 0 var(--space-6);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

@media (max-width: 768px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }
}

.site-footer__brand {
  max-width: 360px;
}

.site-footer__brand .brand {
  margin-bottom: var(--space-3);
}

.site-footer__tagline {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.site-footer__heading {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-subtle);
  margin-bottom: var(--space-3);
}

.site-footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-footer__link {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  transition: color var(--transition);
}

.site-footer__link:hover {
  color: var(--color-primary);
}

.site-footer__bottom {
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  color: var(--color-text-subtle);
  font-size: 0.875rem;
}

/* ===== Animations ===== */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Misc ===== */
.divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-6) 0;
}

.kbd {
  display: inline-block;
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-bottom-width: 2px;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
}

::selection {
  background: color-mix(in srgb, var(--color-primary) 25%, transparent);
  color: var(--color-text);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-surface-alt);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: 999px;
  border: 2px solid var(--color-surface-alt);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-subtle);
}

/* ===== Product-led hero ===== */
.hero {
  padding: clamp(3rem, 7vw, 6.25rem) 0 clamp(2.5rem, 5vw, 4rem);
  background:
    radial-gradient(ellipse 42rem 27rem at 78% 42%, color-mix(in srgb, var(--color-primary) 11%, transparent), transparent 72%),
    linear-gradient(180deg, color-mix(in srgb, var(--color-primary) 4%, var(--color-bg)), var(--color-bg));
}

.hero::before {
  background-image: radial-gradient(color-mix(in srgb, var(--color-primary) 16%, transparent) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: linear-gradient(90deg, transparent 25%, #000 100%);
  opacity: 0.45;
}

.hero__layout {
  display: grid;
  grid-template-columns: minmax(0, 0.84fr) minmax(480px, 1.16fr);
  align-items: center;
  gap: clamp(2.5rem, 6vw, 5rem);
}

.hero__inner {
  max-width: 590px;
  text-align: left;
  margin: 0;
}

.hero__badge {
  margin-bottom: var(--space-5);
  color: var(--color-primary-dark);
  background: color-mix(in srgb, var(--color-primary) 9%, var(--color-surface));
  border-color: color-mix(in srgb, var(--color-primary) 20%, var(--color-border));
}

.hero__title {
  font-size: clamp(2.75rem, 5.5vw, 4.5rem);
  letter-spacing: -0.055em;
  line-height: 1.12;
  margin-bottom: var(--space-4);
}

.hero__title em {
  color: var(--color-primary);
}

.hero__desc {
  max-width: 490px;
  margin: 0 0 var(--space-5);
  font-size: clamp(1.0625rem, 1.5vw, 1.1875rem);
}

.hero__cta {
  justify-content: flex-start;
}

.hero__cta .btn {
  min-height: 50px;
  padding-inline: 20px;
}

.hero__availability {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: var(--space-5);
  color: var(--color-text-subtle);
  font-size: 0.875rem;
}

.hero__availability-dot,
.workspace-preview__status > span:first-child,
.workspace-main__model > span,
.preview-privacy > span:first-child {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: #d69a39;
}

.workspace-preview {
  min-width: 0;
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid color-mix(in srgb, var(--color-border-strong) 78%, transparent);
  border-radius: 18px;
  box-shadow: 0 28px 80px -34px rgba(18, 56, 48, 0.34), 0 10px 28px -18px rgba(15, 23, 42, 0.22);
  transform: rotate(1deg);
  transition: transform 350ms ease, box-shadow 350ms ease;
}

.workspace-preview:hover {
  transform: rotate(0) translateY(-4px);
  box-shadow: 0 34px 90px -36px rgba(18, 56, 48, 0.4), 0 12px 30px -18px rgba(15, 23, 42, 0.25);
}

.workspace-preview__topbar {
  height: 48px;
  display: flex;
  align-items: center;
  padding: 0 15px;
  gap: 13px;
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface-alt) 78%, var(--color-surface));
}

.window-dots {
  display: flex;
  gap: 5px;
}

.window-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #cbd5d1;
}

.window-dots span:first-child { background: #ed8b7c; }
.window-dots span:nth-child(2) { background: #efc46a; }
.window-dots span:nth-child(3) { background: #83c99d; }

.workspace-preview__name {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.workspace-preview__status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  color: var(--color-text-subtle);
  font-size: 0.6875rem;
}

.workspace-preview__status > span:first-child {
  width: 6px;
  height: 6px;
  background: #49a77d;
}

.workspace-preview__body {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  min-height: 342px;
}

.workspace-sidebar {
  display: flex;
  align-items: center;
  flex-direction: column;
  gap: 11px;
  padding: 14px 0 12px;
  border-right: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface-alt) 82%, var(--color-surface));
}

.workspace-sidebar__brand {
  width: 28px;
  height: 28px;
  margin-bottom: 7px;
}

.workspace-sidebar__brand img { width: 100%; height: 100%; }

.workspace-sidebar__item {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  color: var(--color-text-subtle);
  font-size: 1rem;
}

.workspace-sidebar__item.is-active {
  background: color-mix(in srgb, var(--color-primary) 13%, var(--color-surface));
  color: var(--color-primary);
}

.workspace-sidebar__avatar {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  margin-top: auto;
  border-radius: 50%;
  background: #ead7c2;
  color: #795b45;
  font-size: 0.6875rem;
  font-weight: 700;
}

.workspace-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 23px clamp(16px, 3vw, 31px) 16px;
}

.workspace-main__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.workspace-main__eyebrow {
  color: var(--color-text-subtle);
  font-size: 0.5625rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.workspace-main__header h2 {
  margin-top: 4px;
  font-size: clamp(0.9375rem, 1.5vw, 1.1875rem);
  line-height: 1.35;
  letter-spacing: -0.035em;
}

.workspace-main__model {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  border: 1px solid var(--color-border);
  border-radius: 7px;
  color: var(--color-text-muted);
  font-size: 0.625rem;
  white-space: nowrap;
}

.workspace-main__model > span { width: 6px; height: 6px; background: #9282d4; }

.preview-modes {
  align-self: flex-start;
  display: flex;
  gap: 3px;
  margin-top: 18px;
  padding: 3px;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: 9px;
}

.preview-mode {
  padding: 5px 10px;
  color: var(--color-text-subtle);
  border-radius: 6px;
  font-size: 0.6875rem;
  font-weight: 600;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}

.preview-mode:hover { color: var(--color-text); }

.preview-mode.is-active {
  background: var(--color-surface);
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-sm);
}

.preview-conversation {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 11px;
  min-height: 148px;
  padding-top: 18px;
}

.preview-message {
  max-width: 91%;
  padding: 10px 12px;
  border-radius: 11px;
  font-size: 0.75rem;
  line-height: 1.55;
}

.preview-message[hidden],
.preview-tool[hidden] { display: none; }

.preview-message--user {
  align-self: flex-end;
  background: color-mix(in srgb, var(--color-primary) 11%, var(--color-surface));
  color: var(--color-text);
  border-bottom-right-radius: 4px;
}

.preview-message--assistant {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding-left: 0;
  color: var(--color-text-muted);
}

.preview-sparkle {
  flex: 0 0 auto;
  color: var(--color-primary);
  font-size: 1rem;
}

.preview-tool {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text-muted);
  font-size: 0.6875rem;
}

.preview-tool__icon {
  display: grid;
  place-items: center;
  width: 18px;
  height: 18px;
  border-radius: 5px;
  background: color-mix(in srgb, var(--color-primary) 12%, var(--color-surface));
  color: var(--color-primary);
}

.preview-tool__done {
  margin-left: auto;
  color: var(--color-primary);
  font-size: 0.625rem;
  font-weight: 700;
}

.workspace-composer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 39px;
  margin-top: auto;
  padding: 6px 8px 6px 12px;
  border: 1px solid var(--color-border-strong);
  border-radius: 9px;
  color: var(--color-text-subtle);
  font-size: 0.6875rem;
}

.workspace-composer__send {
  display: grid;
  place-items: center;
  width: 25px;
  height: 25px;
  border-radius: 7px;
  background: var(--color-primary);
  color: white;
  font-size: 0.875rem;
}

.workspace-preview__foot {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-top: 10px;
  color: var(--color-text-subtle);
  font-size: 0.5625rem;
}

.workspace-preview__foot > span:first-child { color: var(--color-primary-dark); }

.preview-privacy {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.preview-privacy > span:first-child { width: 6px; height: 6px; background: #49a77d; }

.workspace-preview__caption {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: color-mix(in srgb, var(--color-primary) 5%, var(--color-surface));
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-weight: 600;
}

.caption-sparkle { color: var(--color-primary); }

.hero .highlights {
  margin-top: clamp(2rem, 4vw, 3.5rem);
  padding: 13px 15px;
  background: color-mix(in srgb, var(--color-surface) 82%, transparent);
  border-color: color-mix(in srgb, var(--color-border) 76%, transparent);
  box-shadow: 0 8px 28px -22px rgba(15, 23, 42, 0.25);
}

.hero .highlight { padding-block: 9px; }

.hero .highlight__value { font-size: 1.25rem; }

.hero .highlight__label { font-size: 0.75rem; }

@media (max-width: 920px) {
  .hero__layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 2.5rem;
  }

  .hero__inner { max-width: 620px; }

  .hero__title { font-size: clamp(2.75rem, 7vw, 4rem); }

  .workspace-preview {
    width: min(100%, 680px);
    margin: 0 auto;
    transform: none;
  }

  .workspace-preview:hover { transform: translateY(-3px); }

  .workspace-preview__body { min-height: 320px; }
}

@media (max-width: 760px) {
  .hero { padding-top: 3.25rem; }

  .hero__layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 2.5rem;
  }

  .hero__inner { max-width: 620px; }

  .hero__title { font-size: clamp(2.75rem, 9vw, 4rem); }

  .workspace-preview {
    width: min(100%, 590px);
    margin: 0 auto;
    transform: none;
  }

  .workspace-preview:hover { transform: translateY(-3px); }
}

@media (max-width: 480px) {
  .hero__cta { align-items: stretch; }

  .hero__cta .btn { justify-content: center; flex: 1 1 100%; }

  .workspace-preview__body { grid-template-columns: 42px minmax(0, 1fr); min-height: 330px; }

  .workspace-sidebar { gap: 8px; }

  .workspace-main { padding: 19px 13px 14px; }

  .workspace-main__model { padding: 4px 6px; }

  .preview-mode { padding-inline: 8px; }

  .preview-message { max-width: 100%; }

  .workspace-preview__foot { font-size: 0.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  .workspace-preview,
  .workspace-preview:hover { transition: none; transform: none; }
}

/* ===== Responsive layout refinements ===== */
.section {
  padding-block: clamp(3.5rem, 7vw, 6rem);
}

.code-block pre {
  min-width: 0;
}

@media (max-width: 768px) {
  .highlights {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .highlight {
    border: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .highlight:nth-child(odd):not(:last-child) {
    border-right: 1px solid var(--color-border);
  }

  .highlight:nth-child(3),
  .highlight:nth-child(4),
  .highlight:last-child {
    border-bottom: 0;
  }

  .highlight:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .container {
    padding-inline: 1rem;
  }

  .section-header {
    margin-bottom: var(--space-6);
  }

  .section-header__subtitle {
    font-size: 1rem;
  }

  .features__grid {
    gap: var(--space-4);
  }

  .feature-category,
  .initial-setup {
    padding: var(--space-4);
  }
}

/* ===== Scannable feature groups ===== */
.features__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

.feature-group {
  --feature-accent: var(--color-primary);
  padding: clamp(1.125rem, 3vw, 2rem);
  background: color-mix(in srgb, var(--feature-accent) 4%, var(--color-surface-alt));
  border: 1px solid color-mix(in srgb, var(--feature-accent) 18%, var(--color-border));
  border-radius: var(--radius-xl);
}

.feature-group--extension {
  --feature-accent: #4d5fae;
}

.feature-group--operations {
  --feature-accent: #916019;
}

@media (prefers-color-scheme: dark) {
  .feature-group--extension {
    --feature-accent: #a5b4fc;
  }

  .feature-group--operations {
    --feature-accent: #f2b85b;
  }
}

.feature-group__header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.feature-group__index {
  display: grid;
  place-items: center;
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: color-mix(in srgb, var(--feature-accent) 13%, var(--color-surface));
  color: var(--feature-accent);
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.feature-group__header h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  line-height: 1.25;
  letter-spacing: -0.025em;
  margin-bottom: 4px;
}

.feature-group__header p {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.55;
}

.feature-group__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 290px), 1fr));
  gap: var(--space-3);
}

.feature-category {
  gap: var(--space-4);
  min-width: 0;
  padding: var(--space-4);
  border-color: color-mix(in srgb, var(--feature-accent) 14%, var(--color-border));
  box-shadow: var(--shadow-sm);
}

.feature-category:hover {
  border-color: color-mix(in srgb, var(--feature-accent) 40%, var(--color-border));
}

.feature-category__icon {
  background: color-mix(in srgb, var(--feature-accent) 12%, var(--color-surface));
  color: var(--feature-accent);
}

.feature-category__heading {
  min-width: 0;
}

.feature-category__title {
  margin-bottom: 5px;
}

.feature-category__desc {
  font-size: 0.875rem;
  line-height: 1.55;
}

.feature-category__details {
  border-top: 1px solid var(--color-border);
}

.feature-category__details summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-top: var(--space-3);
  color: var(--feature-accent);
  cursor: pointer;
  list-style: none;
  font-size: 0.8125rem;
  font-weight: 700;
}

.feature-category__details summary::-webkit-details-marker {
  display: none;
}

.feature-category__details summary::after {
  content: "+";
  order: 1;
  margin-left: auto;
  color: var(--color-text-subtle);
  font-size: 1.1rem;
  font-weight: 400;
  transition: transform var(--transition);
}

.feature-category__details[open] summary::after {
  content: "−";
}

.feature-category__details summary:focus-visible {
  outline: 2px solid var(--feature-accent);
  outline-offset: 4px;
  border-radius: 2px;
}

.feature-category__count {
  order: 2;
  padding: 3px 8px;
  background: color-mix(in srgb, var(--feature-accent) 10%, var(--color-surface));
  color: var(--feature-accent);
  white-space: nowrap;
}

.feature-category__details[open] .feature-list {
  padding-top: var(--space-4);
}

@media (max-width: 480px) {
  .feature-group {
    border-radius: var(--radius-lg);
    padding: var(--space-4);
  }

  .feature-group__header {
    gap: var(--space-3);
  }

  .feature-group__index {
    flex-basis: 36px;
    width: 36px;
    height: 36px;
  }
}