:root {
  --blue: #2563eb;
  --blue-dark: #1e3a8a;
  --navy: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --bg: #f8fafc;
  --surface: #ffffff;
  --accent: #facc15;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--navy);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

html {
  scroll-behavior: smooth;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  align-items: center;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  padding: 14px clamp(20px, 5vw, 56px);
}

.brand {
  align-items: center;
  color: var(--navy);
  display: inline-flex;
  font-size: 1.2rem;
  gap: 10px;
  letter-spacing: 0;
}

.brand-icon {
  display: block;
  height: 36px;
  object-fit: contain;
  width: 36px;
}

.brand:hover {
  text-decoration: none;
}

.brand b {
  color: var(--blue);
}

.brand-mark {
  align-items: center;
  background: var(--blue);
  border-radius: 8px;
  color: white;
  display: inline-flex;
  font-weight: 800;
  height: 34px;
  justify-content: center;
  width: 34px;
}

nav {
  display: flex;
  gap: 20px;
  font-weight: 650;
}

nav a {
  color: var(--muted);
}

nav a[aria-current="page"] {
  color: var(--blue);
}

.hero {
  align-items: center;
  display: grid;
  gap: clamp(32px, 5vw, 64px);
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 0.8fr);
  margin: 0 auto;
  max-width: 1220px;
  min-height: 640px;
  padding: clamp(56px, 7vw, 84px) clamp(20px, 5vw, 56px);
}

.hero-copy {
  max-width: 620px;
}

.eyebrow {
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin: 0 0 12px;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2.25rem, 3.2vw, 3.55rem);
  letter-spacing: 0;
  line-height: 1.08;
  margin: 0;
}

h2 {
  font-size: 1.24rem;
  line-height: 1.25;
  margin: 0 0 10px;
}

p {
  margin: 0 0 16px;
}

.lede {
  color: var(--muted);
  font-size: 1.08rem;
  margin-top: 22px;
  max-width: 560px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  align-items: center;
  background: var(--blue);
  border: 1px solid var(--blue);
  border-radius: 8px;
  color: white;
  display: inline-flex;
  font-weight: 750;
  min-height: 46px;
  padding: 10px 18px;
}

.button:hover {
  text-decoration: none;
}

.button.secondary {
  background: white;
  border-color: var(--border);
  color: var(--navy);
}

.app-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 18px 54px rgba(15, 23, 42, 0.08);
  padding: 24px;
}

.phone-top {
  background: #dbeafe;
  border-radius: 999px;
  height: 8px;
  margin-bottom: 28px;
  width: 76px;
}

.app-card h2 {
  font-size: 2rem;
}

.muted {
  color: var(--muted);
}

.answer-preview {
  border-top: 1px solid var(--border);
  margin-top: 20px;
  padding-top: 8px;
}

.answer-row {
  display: grid;
  gap: 16px;
  grid-template-columns: 112px minmax(0, 1fr);
  padding: 11px 0;
}

.answer-row + .answer-row {
  border-top: 1px solid #eef2f7;
}

.answer-row p {
  margin: 0;
}

.compact-copy {
  font-size: 0.94rem;
}

.section-label {
  color: var(--blue-dark);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.ghost-button,
.solid-button {
  border-radius: 8px;
  display: inline-flex;
  font-size: 0.86rem;
  font-weight: 800;
  justify-content: center;
  min-width: 92px;
  padding: 9px 12px;
}

.ghost-button {
  background: white;
  border: 1px solid var(--border);
  color: var(--muted);
}

.solid-button {
  background: var(--blue);
  border: 1px solid var(--blue);
  color: white;
}

.memory-band,
.language-band,
.content-band {
  background: white;
  border-top: 1px solid var(--border);
  padding: 68px clamp(20px, 5vw, 56px);
}

.language-band {
  align-items: center;
  background: var(--bg);
  display: grid;
  gap: 36px;
  grid-template-columns: minmax(0, 0.82fr) minmax(560px, 1.18fr);
  margin: 0 auto;
  max-width: 1220px;
}

.memory-loop {
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.2fr);
  margin: 0 auto 56px;
  max-width: 1220px;
}

.memory-loop h2 {
  font-size: clamp(1.8rem, 2.4vw, 2.55rem);
  line-height: 1.12;
  max-width: 460px;
}

.loop-steps {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(4, 1fr);
}

.loop-steps div {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}

.loop-steps span {
  align-items: center;
  background: #eff6ff;
  border-radius: 8px;
  color: var(--blue-dark);
  display: inline-flex;
  font-size: 0.8rem;
  font-weight: 800;
  height: 28px;
  justify-content: center;
  margin-bottom: 12px;
  width: 28px;
}

.loop-steps strong {
  display: block;
  font-size: 1rem;
  margin-bottom: 6px;
}

.loop-steps p {
  color: var(--muted);
  font-size: 0.94rem;
  margin: 0;
}

.review-preview-band {
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: grid;
  gap: 36px;
  grid-template-columns: minmax(280px, 560px) minmax(320px, 1fr);
  margin: 0 auto;
  max-width: 1220px;
  padding: clamp(28px, 4vw, 52px);
}

.review-phone {
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.07);
  padding: 24px;
}

.review-phone h2 {
  font-size: 2rem;
}

.review-answer {
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin: 18px 0;
  padding: 14px;
}

.review-answer strong,
.review-answer span {
  display: block;
}

.review-answer span {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 4px;
}

.review-actions.wide {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.interval-panel {
  max-width: 760px;
}

.interval-panel h2 {
  font-size: clamp(1.8rem, 2.45vw, 2.65rem);
  line-height: 1.12;
}

.interval-panel p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.05rem;
}

.interval-ladder {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
  position: relative;
}

.interval-ladder span {
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--blue-dark);
  font-size: 0.86rem;
  font-weight: 800;
  padding: 10px 8px;
  text-align: center;
}

.interval-ladder i {
  color: #94a3b8;
  font-style: normal;
  font-weight: 800;
}

.forget-note {
  align-items: flex-start;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  gap: 10px;
  margin-top: 14px;
  padding: 13px 14px;
}

.forget-note strong {
  color: var(--navy);
  flex: 0 0 auto;
}

.forget-note span {
  color: var(--muted);
}

.translation-panel {
  max-width: 760px;
}

.translation-panel h2 {
  font-size: clamp(1.75rem, 2.35vw, 2.55rem);
  line-height: 1.12;
}

.translation-panel p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.05rem;
}

.language-preview {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  min-width: 0;
}

.language-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  min-width: 0;
  padding: 14px;
}

.language-card.active {
  border-color: #bfdbfe;
  box-shadow: 0 12px 34px rgba(37, 99, 235, 0.09);
}

.language-card span {
  color: var(--blue);
  display: block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.language-card strong {
  display: block;
  font-size: 0.98rem;
  margin-bottom: 6px;
}

.language-card p {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0;
}

.language-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  grid-column: 1 / -1;
  margin-top: 6px;
}

.language-list p {
  color: var(--muted);
  flex-basis: 100%;
  font-weight: 700;
  margin: 0 0 2px;
}

.language-list span {
  background: white;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--navy);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 7px 11px;
}

.grid {
  display: grid;
  gap: 28px;
  grid-template-columns: repeat(3, 1fr);
  margin: 0 auto;
  max-width: 1220px;
}

.seo-section {
  border-bottom: 1px solid var(--border);
  margin: 0 auto 42px;
  max-width: 860px;
  padding-bottom: 34px;
  text-align: center;
}

.seo-section > h2 {
  font-size: clamp(1.55rem, 2.1vw, 2.15rem);
  line-height: 1.18;
  margin-bottom: 10px;
}

.seo-section > p {
  color: var(--muted);
  font-size: 1rem;
  margin: 0;
}

.grid article {
  border-top: 2px solid #bfdbfe;
  padding-top: 18px;
}

.trust-list {
  display: grid;
  gap: 10px;
}

.trust-list p {
  margin: 0;
}

.trust-list strong,
.trust-list span {
  display: block;
}

.trust-list span {
  color: var(--muted);
}

.page {
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin: 48px auto;
  max-width: 860px;
  padding: clamp(28px, 5vw, 56px);
}

.page h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  margin-bottom: 12px;
}

.page section {
  border-top: 1px solid var(--border);
  margin-top: 28px;
  padding-top: 24px;
}

footer {
  color: var(--muted);
  padding: 32px clamp(20px, 5vw, 72px);
}

footer p {
  margin: 0;
}

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

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .brand-icon {
    height: 34px;
    width: 34px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 34px 20px 42px;
  }

  h1 {
    font-size: clamp(2.15rem, 11vw, 3rem);
    line-height: 1.05;
  }

  .lede {
    font-size: 1rem;
    margin-top: 16px;
  }

  .actions {
    gap: 10px;
    margin-top: 22px;
  }

  .actions .button {
    justify-content: center;
    width: 100%;
  }

  .actions .button.secondary {
    background: transparent;
    border-color: transparent;
    min-height: auto;
    padding: 4px 0;
  }

  .app-card {
    padding: 18px;
  }

  .app-card h2,
  .review-phone h2 {
    font-size: 1.7rem;
  }

  .memory-band,
  .language-band,
  .content-band {
    padding: 42px 20px;
  }

  .memory-loop {
    gap: 22px;
    margin-bottom: 34px;
  }

  .memory-loop h2,
  .interval-panel h2,
  .translation-panel h2 {
    font-size: 1.85rem;
  }

  .loop-steps {
    gap: 10px;
  }

  .loop-steps div {
    display: grid;
    gap: 4px 12px;
    grid-template-columns: 34px minmax(0, 1fr);
    padding: 13px;
  }

  .loop-steps span {
    grid-row: span 2;
    margin-bottom: 0;
  }

  .loop-steps strong {
    margin-bottom: 0;
  }

  .review-preview-band {
    gap: 24px;
    padding: 18px;
  }

  .answer-row {
    gap: 4px;
    grid-template-columns: 1fr;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .seo-section {
    margin-bottom: 30px;
    padding-bottom: 28px;
  }

  .memory-loop,
  .loop-steps,
  .review-preview-band,
  .language-band,
  .language-preview {
    grid-template-columns: 1fr;
  }

  .interval-ladder {
    gap: 6px;
  }

  .interval-ladder span {
    font-size: 0.8rem;
    padding: 8px 9px;
  }

  .interval-ladder i {
    font-size: 0.8rem;
  }

  .language-card {
    padding: 13px;
  }

  .mobile-sticky-cta {
    background: rgba(255, 255, 255, 0.94);
    border-top: 1px solid var(--border);
    bottom: 0;
    display: block;
    left: 0;
    padding: 10px 14px;
    position: fixed;
    right: 0;
    z-index: 20;
  }

  .mobile-sticky-cta .button {
    justify-content: center;
    width: 100%;
  }

  body {
    padding-bottom: 72px;
  }

}