/* ── Tokens ── */

:root {
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F7F7F8;
  --color-bg-tertiary: #EFEFF1;
  --color-text-primary: #1A1A1E;
  --color-text-secondary: #5F5F6B;
  --color-text-tertiary: #8E8E9A;
  --color-text-inverse: #FFFFFF;
  --color-border-default: #E2E2E6;
  --color-border-subtle: #EEEEEF;
  --color-accent-500: #F97316;
  --color-accent-600: #EA580C;
  --color-success: #16A34A;
  --color-error: #DC2626;
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 6px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-primary: #111113;
    --color-bg-secondary: #18181B;
    --color-bg-tertiary: #1F1F23;
    --color-text-primary: #EDEDEF;
    --color-text-secondary: #A0A0AB;
    --color-text-tertiary: #6E6E7A;
    --color-text-inverse: #1A1A1E;
    --color-border-default: #2A2A30;
    --color-border-subtle: #222228;
    --color-accent-500: #F97316;
    --color-accent-600: #FB923C;
    --color-success: #22C55E;
    --color-error: #EF4444;
  }
}

/* ── Reset ── */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
}

/* ── Shared ── */

.section-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Scroll animations ── */

[data-animate] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 200ms ease, transform 200ms ease;
}

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

[data-animate]:nth-child(2) { transition-delay: 50ms; }
[data-animate]:nth-child(3) { transition-delay: 100ms; }

/* ── Section 1: Hero ── */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 64px 24px;
}

.hero-content {
  text-align: center;
  max-width: 560px;
}

.wordmark {
  font-family: 'Instrument Serif', Georgia, serif;
  font-style: italic;
  font-size: 72px;
  font-weight: 400;
  color: var(--color-text-primary);
  line-height: 1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.accent-dot {
  color: var(--color-accent-500);
}

.tagline {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text-secondary);
  line-height: 1.4;
  margin-bottom: 8px;
}

.subtitle {
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-bottom: 32px;
}

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-text-tertiary);
  animation: pulse-opacity 2s ease infinite;
}

@keyframes pulse-opacity {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.7; }
}

/* ── Waitlist form (shared) ── */

.waitlist-form {
  display: flex;
  gap: 8px;
  max-width: 400px;
  margin: 0 auto;
}

.waitlist-form input {
  flex: 1;
  height: 36px;
  padding: 0 12px;
  font-family: inherit;
  font-size: 13px;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.waitlist-form input:focus {
  border-color: var(--color-accent-500);
  box-shadow: 0 0 0 2px rgba(249, 115, 22, 0.2);
}

.waitlist-form input::placeholder {
  color: var(--color-text-tertiary);
}

.waitlist-form button {
  height: 36px;
  padding: 0 16px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-inverse);
  background: var(--color-accent-500);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 150ms ease;
}

.waitlist-form button:hover {
  background: var(--color-accent-600);
}

.waitlist-form button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-message {
  margin-top: 12px;
  font-size: 13px;
  text-align: center;
}

.form-message.success {
  color: var(--color-success);
}

.form-message.error {
  color: var(--color-error);
}

/* ── Section 2: Product concept ── */

.concept {
  background: var(--color-bg-secondary);
  padding: 80px 24px;
}

.section-heading {
  font-family: 'Instrument Serif', Georgia, serif;
  font-style: italic;
  font-size: 32px;
  font-weight: 400;
  color: var(--color-text-primary);
  text-align: center;
  margin-bottom: 40px;
  letter-spacing: -0.01em;
}

.concept-diagram {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-bottom: 24px;
}

.concept-column {
  flex: 0 1 240px;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: 16px;
}

.concept-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.concept-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.concept-list li {
  font-size: 13px;
  color: var(--color-text-primary);
  padding: 6px 10px;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-sm);
}

.concept-converge {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.converge-lines {
  display: flex;
  justify-content: center;
  gap: 0;
  width: 200px;
  height: 32px;
  position: relative;
}

.converge-line {
  position: absolute;
  top: 0;
  width: 2px;
  height: 100%;
  background: var(--color-border-default);
}

.converge-left {
  left: 30%;
  transform: skewX(20deg);
}

.converge-right {
  right: 30%;
  transform: skewX(-20deg);
}

.concept-feed {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: 16px;
  width: 100%;
  max-width: 504px;
}

.concept-feed-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.skeleton-entries {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.skeleton-entry {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.skeleton-avatar {
  width: 28px;
  height: 28px;
  border-radius: 9999px;
  background: var(--color-bg-tertiary);
  flex-shrink: 0;
}

.skeleton-lines {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 4px;
}

.skeleton-line {
  height: 8px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-tertiary);
}

.skeleton-line-long { width: 85%; }
.skeleton-line-medium { width: 60%; }
.skeleton-line-short { width: 45%; }

.concept-caption {
  font-size: 13px;
  color: var(--color-text-secondary);
  text-align: center;
  margin-top: 24px;
  line-height: 1.6;
}

/* ── Section 3: Value propositions ── */

.values {
  padding: 80px 24px;
}

.value-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 0;
}

.value-icon {
  flex-shrink: 0;
  color: var(--color-text-secondary);
  padding-top: 2px;
}

.value-text h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.value-text p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.value-divider {
  height: 1px;
  background: var(--color-border-subtle);
}

/* ── Section 4: Second CTA ── */

.cta {
  padding: 80px 24px;
  text-align: center;
  background: var(--color-bg-secondary);
}

.cta-heading {
  font-family: 'Instrument Serif', Georgia, serif;
  font-style: italic;
  font-size: 28px;
  font-weight: 400;
  color: var(--color-text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.cta-subtitle {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
}

/* ── Section 5: Download ── */

.download {
  padding: 80px 24px;
  text-align: center;
}

.download-subtitle {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
}

.download-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-inverse);
  background: var(--color-accent-500);
  border: none;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: background 150ms ease;
}

.download-button:hover {
  background: var(--color-accent-600);
}

/* ── Section 6: Footer ── */

.site-footer {
  padding: 40px 24px;
  text-align: center;
}

.footer-text {
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin-bottom: 4px;
}

.footer-brand {
  font-size: 12px;
  color: var(--color-text-tertiary);
  font-weight: 500;
}

/* ── Responsive ── */

@media (max-width: 768px) {
  .wordmark {
    font-size: 56px;
  }

  .section-heading {
    font-size: 26px;
  }

  .concept-diagram {
    flex-direction: column;
    align-items: center;
  }

  .concept-column {
    flex: none;
    width: 100%;
    max-width: 320px;
  }

  .converge-lines {
    width: 100px;
  }
}

@media (max-width: 480px) {
  .wordmark {
    font-size: 48px;
  }

  .tagline {
    font-size: 16px;
  }

  .hero {
    padding: 48px 16px;
  }

  .concept {
    padding: 56px 16px;
  }

  .values {
    padding: 56px 16px;
  }

  .cta {
    padding: 56px 16px;
  }

  .cta-heading {
    font-size: 24px;
  }

  .waitlist-form {
    flex-direction: column;
  }

  .waitlist-form button {
    width: 100%;
  }

  .section-inner {
    padding: 0 16px;
  }
}