:root {
  color-scheme: light;
  --bg: #f8fafc;
  --bg-soft: #eef2ff;
  --surface: #ffffff;
  --surface-elevated: #ffffff;
  --text: #0f172a;
  --text-muted: #334155;
  --text-soft: #475569;
  --border: #cbd5e1;
  --brand: #4f46e5;
  --brand-strong: #4338ca;
  --brand-soft: #e0e7ff;
  --success: #0f766e;
  --shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b1020;
  --bg-soft: #141c33;
  --surface: #131a2e;
  --surface-elevated: #1a2239;
  --text: #eef2ff;
  --text-muted: #cbd5e1;
  --text-soft: #9aa4c2;
  --border: #2b3657;
  --brand: #818cf8;
  --brand-strong: #a5b4fc;
  --brand-soft: rgba(129, 140, 248, 0.16);
  --success: #5eead4;
  --shadow: 0 16px 36px rgba(0, 0, 0, 0.34);
}

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

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-padding-top: calc(5.5rem + env(safe-area-inset-top, 0px));
}

body {
  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  padding-bottom: calc(5.5rem + env(safe-area-inset-bottom, 0px));
  position: relative;
  overflow-x: clip;
}

a {
  color: inherit;
}

body::before,
body::after {
  content: "";
  position: fixed;
  z-index: -1;
  pointer-events: none;
  border-radius: 999px;
  filter: blur(60px);
  opacity: 0.32;
}

body::before {
  width: 18rem;
  height: 18rem;
  top: 5rem;
  right: -5rem;
  background: color-mix(in oklab, var(--brand) 34%, transparent);
}

body::after {
  width: 22rem;
  height: 22rem;
  bottom: -8rem;
  left: -7rem;
  background: color-mix(in oklab, var(--success) 22%, transparent);
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg) 90%, transparent);
  backdrop-filter: blur(10px);
}

.topbar-inner {
  min-height: 4.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.45rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand-dot {
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--brand), var(--success));
}

.topbar-controls {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.lang-switcher {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem;
  background: var(--surface);
}

.lang-btn {
  border: none;
  background: transparent;
  color: var(--text-muted);
  padding: 0.5rem 0.62rem;
  min-width: 2.2rem;
  min-height: 2.4rem;
  border-radius: 999px;
  font-size: 0.79rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
}

.lang-btn.is-active {
  background: var(--brand-soft);
  color: var(--brand-strong);
}

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  padding: 0.52rem 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.section {
  padding: 5.8rem 0;
}

.section-soft {
  background: var(--bg-soft);
}

.hero {
  padding-top: 4.3rem;
}

.hero-grid {
  display: grid;
  gap: 1.8rem;
}

.hero-copy {
  max-width: 46rem;
}

.eyebrow {
  font-weight: 700;
  color: var(--brand-strong);
  margin: 0 0 0.9rem;
}

h1,
h2,
h3 {
  margin: 0 0 1.05rem;
  letter-spacing: 0.01em;
  line-height: 1.18;
  text-wrap: balance;
}

h1 {
  font-size: clamp(1.9rem, 5.2vw, 3.1rem);
  max-width: 22ch;
}

h2 {
  font-size: clamp(1.45rem, 3.6vw, 2.2rem);
}

h3 {
  font-size: clamp(1.06rem, 2.6vw, 1.34rem);
}

p {
  margin: 0;
  color: var(--text-muted);
}

.hero-subtitle {
  margin-top: 1.2rem;
  max-width: 62ch;
  color: var(--text-soft);
  font-size: 1.08rem;
}

.hero-chips {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  padding: 0.35rem 0.72rem;
  font-size: 0.86rem;
  font-weight: 600;
}

.chip-highlight {
  color: var(--success);
}

.hero-actions {
  margin-top: 1.6rem;
  display: flex;
  gap: 0.72rem;
  flex-wrap: wrap;
}

.hero-primary-wrap {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.48rem;
}

.hero-cta-note {
  font-size: 0.84rem;
  color: var(--text-soft);
}

.btn {
  text-decoration: none;
  border-radius: 0.78rem;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.72rem 1.08rem;
  font-weight: 700;
  cursor: pointer;
}

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

.btn-primary:hover {
  background: var(--brand-strong);
}

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

.btn-secondary:hover {
  background: color-mix(in oklab, var(--surface) 85%, var(--brand-soft));
}

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

.btn-small {
  min-height: 2.1rem;
  padding: 0.45rem 0.72rem;
  font-size: 0.84rem;
}

.btn-large {
  min-height: 3.15rem;
  font-size: 1.02rem;
  padding-inline: 1.3rem;
}

.mascot-card {
  border: 1px solid var(--border);
  background: var(--surface-elevated);
  border-radius: 1.2rem;
  padding: 1.45rem;
  box-shadow: var(--shadow);
}

.mascot-emoji {
  width: 5.5rem;
  height: 5.5rem;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, color-mix(in oklab, var(--brand-soft) 75%, #ffffff), var(--brand-soft));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  box-shadow: 0 12px 28px rgba(79, 70, 229, 0.24);
  animation: mascot-float 5.2s ease-in-out infinite;
}

.mascot-title {
  margin-top: 1.1rem;
  color: var(--text);
  font-weight: 800;
}

.mascot-text {
  margin-top: 0.72rem;
}

.preview-card {
  margin-top: 1.2rem;
  border-radius: 0.95rem;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 88%, var(--bg-soft));
  padding: 1rem;
}

.reading-mockup {
  margin-top: 1.3rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.mockup-topbar {
  padding: 0.55rem 0.72rem;
  border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 92%, var(--bg-soft));
}

.mockup-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--brand-soft);
  color: var(--brand-strong);
  font-size: 0.76rem;
  font-weight: 700;
  padding: 0.24rem 0.62rem;
}

.mockup-body {
  display: grid;
  gap: 0.95rem;
  padding: 0.95rem;
}

.mockup-paragraph-grid {
  display: grid;
  gap: 0.78rem;
}

.mockup-paragraph {
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: color-mix(in oklab, var(--surface) 90%, var(--bg-soft));
  padding: 0.82rem;
}

.mockup-label {
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--brand-strong);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.mockup-text {
  margin-top: 0.34rem;
  color: var(--text);
  font-size: 0.9rem;
}

.mockup-word {
  display: inline-block;
  border-radius: 0.35rem;
  padding: 0.06rem 0.3rem;
  background: color-mix(in oklab, var(--brand-soft) 65%, transparent);
  color: var(--text);
  transition:
    background-color 220ms ease,
    transform 220ms ease,
    box-shadow 220ms ease;
}

.mockup-word:hover {
  background: color-mix(in oklab, var(--brand) 20%, var(--brand-soft));
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(79, 70, 229, 0.18);
}

.preview-title {
  color: var(--text);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.preview-line {
  font-size: 0.94rem;
  color: var(--text-muted);
}

.preview-line + .preview-line {
  margin-top: 0.35rem;
}

.section-lead {
  margin-top: 0.88rem;
  max-width: 72ch;
}

.card-grid {
  margin-top: 1.7rem;
  display: grid;
  gap: 1.2rem;
}

.two-col {
  display: grid;
  gap: 1.2rem;
}

.card {
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--surface);
  padding: 1.35rem;
  transition:
    transform 240ms ease,
    border-color 240ms ease,
    box-shadow 240ms ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in oklab, var(--border) 70%, var(--brand-soft));
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.1);
}

.metric-card {
  text-align: left;
}

.benefit-title {
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 800;
  line-height: 1.3;
}

.benefit-body {
  margin-top: 0.55rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.how-layout {
  margin-top: 1.6rem;
  display: grid;
  gap: 1.2rem;
}

.how-preview {
  display: flex;
  flex-direction: column;
  gap: 0.72rem;
}

.mock-reader {
  border: 1px solid var(--border);
  border-radius: 0.86rem;
  background: color-mix(in oklab, var(--surface) 90%, var(--bg-soft));
  padding: 0.82rem;
}

.mock-reader-label {
  color: var(--brand-strong);
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.mock-reader-text {
  margin-top: 0.25rem;
  color: var(--text);
  font-size: 0.93rem;
}

.mock-reader-label + .mock-reader-text + .mock-reader-label {
  margin-top: 0.6rem;
}

.step-index {
  color: var(--brand-strong);
  font-weight: 800;
  margin-bottom: 0.45rem;
}

.step-icon,
.feature-icon {
  width: 2rem;
  height: 2rem;
  border-radius: 0.62rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.02rem;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 86%, var(--bg-soft));
  margin-bottom: 0.68rem;
}

.faq-list {
  margin-top: 1.55rem;
  display: grid;
  gap: 0.72rem;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  background: var(--surface);
  padding: 1.05rem 1.05rem;
}

.faq-item > summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--text);
}

.faq-item[open] > p {
  margin-top: 0.58rem;
}

.section-cta {
  padding-bottom: 7rem;
}

.cta-wrap {
  text-align: center;
}

.cta-wrap p {
  margin: 0.95rem auto 1.5rem;
  max-width: 48ch;
}

.language-notice {
  position: fixed;
  bottom: calc(5.2rem + env(safe-area-inset-bottom, 0px));
  left: 1rem;
  right: 1rem;
  z-index: 55;
  border: 1px solid var(--border);
  border-radius: 0.95rem;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 0.95rem;
}

.language-notice p {
  color: var(--text);
}

.language-notice-actions {
  margin-top: 0.72rem;
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.is-hidden {
  display: none;
}

.sticky-mobile-cta {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
  z-index: 50;
  border-radius: 0.82rem;
  background: var(--brand);
  color: #ffffff;
  text-decoration: none;
  font-weight: 800;
  text-align: center;
  padding: 0.82rem 1rem;
  box-shadow: var(--shadow);
}

@media (min-width: 720px) {
  .section {
    padding: 7rem 0;
  }

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

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

  .metrics-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .how-layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: stretch;
  }
}

@media (min-width: 980px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.82fr);
    align-items: start;
    gap: 2rem;
  }

  .card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .sticky-mobile-cta {
    display: none;
  }

  body {
    padding-bottom: 0;
  }

  .language-notice {
    max-width: 30rem;
    left: auto;
    right: 1.2rem;
    bottom: calc(1.2rem + env(safe-area-inset-bottom, 0px));
  }

  .section-cta {
    padding-bottom: 5.2rem;
  }
}

@media (max-width: 719px) {
  .lang-btn {
    min-width: 2.55rem;
    min-height: 2.6rem;
    font-size: 0.83rem;
  }
}

@keyframes mascot-float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-4px);
  }
}