:root {
  color-scheme: dark light;
  --bg: #081019;
  --bg-soft: #0d1623;
  --surface: rgba(10, 19, 31, 0.72);
  --surface-strong: rgba(13, 24, 39, 0.94);
  --surface-alt: rgba(15, 28, 45, 0.88);
  --card-border: rgba(142, 178, 214, 0.14);
  --text: #edf4ff;
  --text-soft: #a8b7cc;
  --accent: #78d6f7;
  --accent-strong: #52b7dc;
  --accent-soft: rgba(120, 214, 247, 0.16);
  --shadow: 0 28px 80px rgba(3, 8, 17, 0.42);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --max-width: 1180px;
  --font-display: "Space Grotesk", "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #edf3f8;
    --bg-soft: #f7fafd;
    --surface: rgba(255, 255, 255, 0.78);
    --surface-strong: rgba(255, 255, 255, 0.96);
    --surface-alt: rgba(246, 250, 255, 0.95);
    --card-border: rgba(18, 32, 49, 0.08);
    --text: #0d1b2b;
    --text-soft: #506179;
    --accent: #0d86b7;
    --accent-strong: #066e98;
    --accent-soft: rgba(13, 134, 183, 0.1);
    --shadow: 0 24px 70px rgba(17, 26, 38, 0.09);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at 12% 12%, rgba(120, 214, 247, 0.18), transparent 25%),
    radial-gradient(circle at 85% 18%, rgba(82, 183, 220, 0.2), transparent 22%),
    linear-gradient(180deg, var(--bg), #060c14 55%, var(--bg));
  min-height: 100vh;
}

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

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

button,
.button {
  font: inherit;
}

.page-shell {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.site-header,
.site-footer,
.cta-panel,
.feature-card,
.step-card,
.privacy-panel,
.audience-card,
.browser-mockup,
.panel-mockup {
  backdrop-filter: blur(18px);
}

.site-header {
  position: sticky;
  top: 16px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 18px;
  margin-bottom: 34px;
  border: 1px solid var(--card-border);
  border-radius: 999px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand span,
.footer-brand span {
  font-family: var(--font-display);
}

.site-nav {
  display: inline-flex;
  gap: 22px;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-footer a:hover {
  color: var(--accent);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease, background 180ms ease;
}

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

.button:focus-visible,
.site-nav a:focus-visible,
.site-footer a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.button-primary {
  background: linear-gradient(180deg, rgba(120, 214, 247, 0.24), rgba(120, 214, 247, 0.08)), var(--surface-strong);
  border-color: rgba(120, 214, 247, 0.32);
  box-shadow: 0 16px 40px rgba(82, 183, 220, 0.16);
}

.button-secondary {
  background: var(--surface);
  border-color: var(--card-border);
  color: var(--text-soft);
}

.section {
  padding: 46px 0;
}

.hero {
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  gap: 42px;
  align-items: center;
  min-height: calc(100vh - 140px);
  padding-top: 18px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.final-cta h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 5vw, 5.2rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.hero-text,
.section-heading p,
.step-card p,
.feature-card p,
.privacy-panel p,
.audience-card p,
.site-footer p {
  color: var(--text-soft);
}

.hero-text {
  max-width: 640px;
  margin: 22px 0 0;
  font-size: 1.08rem;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 0;
  margin: 26px 0 0;
  list-style: none;
}

.trust-strip li {
  padding: 10px 14px;
  border: 1px solid var(--card-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-soft);
  font-size: 0.94rem;
}

.hero-visual {
  position: relative;
}

.visual-orb {
  position: absolute;
  inset: auto;
  border-radius: 50%;
  filter: blur(30px);
  pointer-events: none;
}

.orb-one {
  width: 180px;
  height: 180px;
  top: -30px;
  right: 18px;
  background: rgba(120, 214, 247, 0.18);
}

.orb-two {
  width: 220px;
  height: 220px;
  bottom: 8px;
  left: 18px;
  background: rgba(82, 183, 220, 0.14);
}

.mockup-scene {
  position: relative;
  min-height: 620px;
}

.browser-mockup,
.panel-mockup,
.feature-card,
.step-card,
.privacy-panel,
.audience-card,
.cta-panel {
  border: 1px solid var(--card-border);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.browser-mockup {
  position: relative;
  width: min(100%, 660px);
  padding: 18px;
  border-radius: var(--radius-xl);
}

.browser-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 0 18px;
}

.browser-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
}

.browser-address {
  margin-left: 8px;
  padding: 10px 14px;
  flex: 1;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-soft);
  font-size: 0.88rem;
}

.chat-surface {
  padding: 22px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(4, 8, 15, 0.82), rgba(9, 13, 21, 0.92));
}

.chat-row + .chat-row {
  margin-top: 20px;
}

.chat-row-user {
  display: flex;
  justify-content: flex-end;
}

.chat-bubble,
.chat-block,
.bookmark-card,
.step-card,
.feature-card,
.audience-card {
  border-radius: var(--radius-lg);
}

.chat-bubble-user {
  max-width: 76%;
  padding: 14px 16px;
  background: rgba(120, 214, 247, 0.14);
  border: 1px solid rgba(120, 214, 247, 0.18);
  font-weight: 500;
}

.chat-block {
  position: relative;
  padding: 18px 18px 22px;
  margin-right: 104px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.chat-label,
.panel-kicker {
  margin: 0;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.chat-title {
  margin-top: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.chat-lines,
.chat-lines span {
  display: block;
}

.chat-lines {
  margin-top: 14px;
}

.chat-lines span {
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}

.chat-lines span + span {
  margin-top: 10px;
}

.chat-lines span:nth-child(1) { width: 92%; }
.chat-lines span:nth-child(2) { width: 84%; }
.chat-lines span:nth-child(3) { width: 68%; }
.chat-lines.wide span:nth-child(1) { width: 88%; }
.chat-lines.wide span:nth-child(2) { width: 92%; }
.chat-lines.wide span:nth-child(3) { width: 77%; }

.save-pill {
  position: absolute;
  right: 22px;
  bottom: 26px;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid rgba(120, 214, 247, 0.24);
  background: rgba(9, 16, 27, 0.92);
  color: var(--text);
  font-weight: 600;
}

.panel-mockup {
  position: absolute;
  right: 0;
  top: 74px;
  width: min(320px, 90%);
  padding: 18px;
  border-radius: 28px;
}

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

.panel-head h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: -0.04em;
}

.panel-head button {
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.bookmark-card {
  margin-top: 18px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.bookmark-card h3 {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.35;
}

.bookmark-card p {
  margin: 12px 0 0;
  color: var(--text-soft);
  line-height: 1.55;
}

.bookmark-card span {
  display: inline-block;
  margin-top: 14px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.92rem;
}

.bookmark-card.muted {
  opacity: 0.78;
}

.section-heading {
  max-width: 780px;
}

.section-heading h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.section-heading p {
  margin: 16px 0 0;
  line-height: 1.75;
}

.section-grid {
  padding-top: 20px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.feature-card,
.step-card,
.audience-card {
  padding: 24px;
}

.feature-index,
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
}

.feature-card h3,
.step-card h3,
.audience-card h3,
.privacy-panel h3 {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-size: 1.28rem;
  letter-spacing: -0.03em;
}

.feature-card p,
.step-card p,
.audience-card p {
  margin: 12px 0 0;
  line-height: 1.7;
}

.workflow .steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.split-section {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 22px;
  align-items: start;
}

.compact {
  max-width: 620px;
}

.privacy-panel {
  display: grid;
  gap: 18px;
  padding: 24px;
  border-radius: var(--radius-xl);
}

.privacy-panel article {
  padding: 18px 18px 20px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.privacy-panel p {
  margin: 10px 0 0;
  line-height: 1.7;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.final-cta .cta-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 28px;
  border-radius: var(--radius-xl);
}

.final-cta h2 {
  font-size: clamp(1.85rem, 4vw, 3rem);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 26px 2px 8px;
  color: var(--text-soft);
  font-size: 0.95rem;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 500ms ease, transform 500ms ease;
}

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

@media (max-width: 1080px) {
  .hero,
  .split-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .mockup-scene {
    min-height: 680px;
  }

  .panel-mockup {
    top: auto;
    bottom: 0;
  }

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

@media (max-width: 860px) {
  .site-header {
    border-radius: 26px;
    padding: 16px;
    flex-wrap: wrap;
  }

  .site-nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
    padding-top: 4px;
  }

  .button-nav {
    margin-left: auto;
  }

  .feature-grid,
  .workflow .steps,
  .audience-grid {
    grid-template-columns: 1fr;
  }

  .final-cta .cta-panel,
  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(calc(100% - 20px), var(--max-width));
    padding-top: 16px;
  }

  .hero {
    gap: 24px;
  }

  .hero h1 {
    font-size: clamp(2.35rem, 10vw, 3.6rem);
  }

  .mockup-scene {
    min-height: 640px;
  }

  .browser-mockup {
    padding: 14px;
  }

  .chat-surface {
    padding: 16px;
  }

  .chat-block {
    margin-right: 0;
    padding-bottom: 74px;
  }

  .save-pill {
    left: 18px;
    right: auto;
  }

  .panel-mockup {
    position: relative;
    width: 100%;
    margin-top: 18px;
  }

  .trust-strip {
    flex-direction: column;
    align-items: flex-start;
  }
}