/* SleepFactor marketing site — palette aligned with mobile app (constants/colors.js) */

@font-face {
  font-family: 'Overused Grotesk';
  src: url('../fonts/OverusedGrotesk-VF.woff2') format('woff2-variations');
  font-weight: 300 900;
  font-style: normal;
  font-display: swap;
}

:root {
  /* App brand tokens */
  --primary: #2469B2;
  --primary-dark: #11294B;
  --secondary: #243D80;
  --primary-light: #6698CF;
  --background-app: #F3F4F5;
  --text-primary: #11294B;
  --text-secondary: #5C6B7A;
  --text-light: #8B96A3;
  --border-app: #D4E4F2;
  --accent-soft: #B0CDEB;
  --white: #FFFFFF;
  --success: #10B981;

  --background: var(--background-app);
  --card-bg: var(--white);
  --border: var(--border-app);

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-regular: 16px;
  --spacing-lg: 20px;
  --spacing-xl: 24px;
  --spacing-xxl: 32px;
  --section-spacing: 48px;
  --font-body: 16px;
  --font-small: 14px;
  --font-medium: 20px;
  --font-large: 24px;
  --font-xl: 28px;
  --font-2xl: 36px;
  --line-height-body: 1.5;
  --line-height-tight: 1.25;
  --font-family-sans: 'Overused Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Oxygen, Ubuntu, sans-serif;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 4px 24px rgba(17, 41, 75, 0.08);
  --header-h: 64px;
}

* {
  box-sizing: border-box;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--spacing-regular);
  z-index: 1000;
  padding: var(--spacing-sm) var(--spacing-regular);
  background: var(--white);
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: var(--spacing-regular);
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-family-sans);
  font-size: var(--font-body);
  line-height: var(--line-height-body);
  color: var(--text-primary);
  background: var(--background);
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

/* —— Header (light bar, app wordmark) —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(243, 244, 245, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-app);
  padding: var(--spacing-md) 0;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-regular);
  flex-wrap: wrap;
}

.logo-link {
  display: inline-block;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-link img {
  display: block;
  height: 32px;
  width: auto;
}

.logo-link--footer img {
  height: 28px;
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
  min-width: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(12px, 3vw, 28px);
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-links a {
  text-decoration: none;
  font-size: var(--font-small);
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--primary);
}

.btn-nav-cta {
  flex-shrink: 0;
  padding: 10px 20px;
  font-size: var(--font-small);
  font-weight: 600;
  border-radius: var(--radius-pill);
  background: var(--primary);
  color: var(--white);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.15s ease, opacity 0.15s ease;
}

.btn-nav-cta:hover {
  background: var(--secondary);
  opacity: 1;
}

@media (max-width: 900px) {
  .site-nav {
    order: 3;
    flex-basis: 100%;
    justify-content: flex-start;
  }
  .btn-nav-cta {
    margin-left: auto;
  }
}

@media (max-width: 520px) {
  .nav-links {
    gap: var(--spacing-sm);
  }
  .nav-links a {
    font-size: 13px;
  }
}

/* —— Hero —— */
.hero--split {
  padding: var(--spacing-xxl) 0 calc(var(--section-spacing) + 8px);
  background: linear-gradient(180deg, #E8EEF5 0%, var(--background-app) 45%);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
}

@media (min-width: 880px) {
  .hero__grid {
    grid-template-columns: 1fr 1.05fr;
    gap: var(--spacing-xxl);
  }
}

.hero__badge {
  display: inline-block;
  margin: 0 0 var(--spacing-md);
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(36, 105, 178, 0.12);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(36, 105, 178, 0.2);
}

.hero-headline {
  font-size: clamp(1.75rem, 4vw, var(--font-2xl));
  font-weight: 700;
  margin: 0 0 var(--spacing-lg);
  color: var(--primary-dark);
  line-height: 1.15;
}

.hero__lead {
  margin: 0 0 var(--spacing-xl);
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--text-secondary);
  max-width: 34em;
  line-height: 1.55;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
}

.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: var(--font-body);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
  text-align: center;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

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

.btn-secondary {
  background: var(--white);
  color: var(--primary-dark);
  border: 2px solid var(--border-app);
  box-shadow: 0 1px 2px rgba(17, 41, 75, 0.06);
}

.btn-secondary:hover {
  border-color: var(--primary-light);
  color: var(--primary);
}

.btn-hero-primary {
  padding: 14px 28px;
  font-size: var(--font-medium);
}

.btn-hero-secondary {
  padding: 12px 22px;
}

/* No card chrome — phone sits on hero gradient; transparent PNG shows through */
.hero__visual {
  background: transparent;
  border: none;
  box-shadow: none;
  border-radius: 0;
  overflow: visible;
}

.hero__visual img {
  width: 100%;
  max-width: 364px; /* ~70% of prior 520px cap */
  margin: 0 auto;
  height: auto;
  display: block;
  vertical-align: middle;
  filter: drop-shadow(0 12px 32px rgba(17, 41, 75, 0.12));
}

/* —— Science intro strip —— */
.section--science-intro {
  padding: var(--spacing-xl) 0;
  background: var(--white);
  border-top: 1px solid var(--border-app);
  border-bottom: 1px solid var(--border-app);
}

.science-intro__text {
  margin: 0;
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.55;
}

.science-intro__text strong {
  color: var(--primary-dark);
}

/* —— Three steps —— */
.section--science {
  padding: var(--section-spacing) 0;
  background: var(--background-app);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xxl);
}

.section-title {
  font-size: clamp(1.5rem, 3vw, var(--font-large));
  font-weight: 700;
  margin: 0 0 var(--spacing-md);
  color: var(--primary-dark);
}

.section-intro {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--font-body);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.science-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

@media (min-width: 900px) {
  .science-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    align-items: start;
  }
}

.science-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-app);
  padding: var(--spacing-lg);
  box-shadow: 0 2px 12px rgba(17, 41, 75, 0.05);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.science-card__media {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
  background: var(--background-app);
  border: 1px solid var(--border-app);
}

.science-card__media img {
  width: 100%;
  height: auto;
  display: block;
  max-height: 420px;
  object-fit: contain;
  object-position: center;
}

.science-card__step {
  margin: 0 0 var(--spacing-xs);
  font-size: var(--font-medium);
  font-weight: 700;
  color: var(--primary-light);
  line-height: 1;
}

.science-card__title {
  margin: 0 0 var(--spacing-sm);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--primary-dark);
}

.science-card__body {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--font-small);
  line-height: 1.55;
}

.science-card__integrations {
  margin-top: var(--spacing-md);
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.integration-badges {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.integration-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 12px;
}

.integration-icon {
  flex-shrink: 0;
}

.integration-badge--apple {
  background: #000;
  color: #fff;
}

.integration-badge--google {
  background: #fff;
  color: #1a73e8;
  border: 1px solid #dadce0;
}

/* —— Correlation engine —— */
.section--correlation {
  padding: var(--section-spacing) 0;
  background: var(--white);
}

.correlation-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
}

@media (min-width: 880px) {
  .correlation-block {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
  }
}

.correlation-frame {
  background: var(--background-app);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  border: 1px solid var(--border-app);
  box-shadow: var(--shadow-card);
}

.correlation-frame img {
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
  display: block;
  height: auto;
}

.correlation-block__copy {
  padding: 0 var(--spacing-sm);
}

.section-title--left {
  text-align: left;
}

.correlation-lead {
  font-size: var(--font-body);
  color: var(--text-secondary);
  line-height: 1.55;
  margin: 0 0 var(--spacing-xl);
}

.correlation-lead strong {
  color: var(--primary-dark);
}

.feature-highlight {
  background: var(--background-app);
  border: 1px solid var(--border-app);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.feature-highlight__title {
  margin: 0 0 var(--spacing-sm);
  font-size: var(--font-small);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}

.feature-highlight__body {
  margin: 0;
  color: var(--text-primary);
  font-size: var(--font-small);
  line-height: 1.5;
}

.feature-pills {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.feature-pill {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-start;
  padding: var(--spacing-md);
  background: var(--white);
  border: 1px solid var(--border-app);
  border-radius: var(--radius);
}

.feature-pill__icon {
  flex-shrink: 0;
  color: var(--primary);
}

.feature-pill__text {
  font-size: var(--font-small);
  color: var(--text-secondary);
  line-height: 1.45;
}

.feature-pill__text strong {
  color: var(--primary-dark);
}

/* —— CTA —— */
.cta-section {
  padding: var(--section-spacing) 0;
}

.cta-section--navy {
  background: linear-gradient(180deg, var(--primary-dark) 0%, #0d1f38 100%);
  color: var(--white);
}

.cta-section__inner {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

.cta-section__title {
  margin: 0 0 var(--spacing-md);
  font-size: clamp(1.5rem, 3vw, var(--font-xl));
  font-weight: 700;
  color: var(--white);
}

.cta-section__lead {
  margin: 0 0 var(--spacing-xl);
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--font-body);
  line-height: 1.5;
}

.cta-footnote {
  margin: var(--spacing-xl) 0 0;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
}

.waitlist-form {
  max-width: 480px;
  margin: 0 auto var(--spacing-md);
  text-align: left;
}

.waitlist-form__row--email {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  align-items: stretch;
  margin-bottom: var(--spacing-lg);
  padding: 6px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.waitlist-form__row--email input[type="email"] {
  flex: 1;
  min-width: 180px;
  border: none;
  background: transparent;
  color: var(--white);
  padding: 12px 16px;
  font-size: var(--font-body);
}

.waitlist-form__row--email input::placeholder {
  color: rgba(255, 255, 255, 0.45);
}

.waitlist-form__row--email input:focus {
  outline: none;
  box-shadow: none;
}

.waitlist-form__row--email input[type="email"]:focus-visible {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.btn-cta-submit {
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  background: var(--white);
  color: var(--primary-dark);
  font-weight: 700;
  flex-shrink: 0;
}

.btn-cta-submit:hover {
  background: var(--accent-soft);
}

.waitlist-form .form-row {
  margin-bottom: var(--spacing-regular);
}

.waitlist-form label {
  display: block;
  font-size: var(--font-small);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xs);
}

.waitlist-form .optional {
  font-weight: 400;
  color: rgba(255, 255, 255, 0.5);
}

.waitlist-form .form-row:not(.waitlist-form__row--email) input[type="text"] {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-regular);
  font-size: var(--font-body);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.2);
  color: var(--white);
}

.waitlist-form .form-row:not(.waitlist-form__row--email) input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.waitlist-form .form-row:not(.waitlist-form__row--email) input:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 2px rgba(102, 152, 207, 0.35);
}

.platform-label {
  display: block;
  font-size: var(--font-small);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--spacing-sm);
}

.platform-options {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.platform-option {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-small);
  color: rgba(255, 255, 255, 0.9);
  cursor: pointer;
}

.platform-option input {
  width: auto;
  margin: 0;
  accent-color: var(--primary-light);
}

.reasons-label {
  display: block;
  font-size: var(--font-small);
  font-weight: 700;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: var(--spacing-sm);
}

.reasons-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.reasons-item {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-small);
  color: rgba(255, 255, 255, 0.88);
  cursor: pointer;
}

.reasons-item input {
  width: auto;
  margin: 0;
  accent-color: var(--primary-light);
}

.waitlist-message {
  font-size: var(--font-small);
  margin-top: var(--spacing-regular);
  padding: var(--spacing-sm) var(--spacing-regular);
  border-radius: var(--radius-sm);
}

.waitlist-message--success {
  background: rgba(16, 185, 129, 0.2);
  color: #a7f3d0;
}

.waitlist-message--error {
  background: rgba(239, 68, 68, 0.15);
  color: #fecaca;
}

.waitlist-form button[type="submit"]:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* —— Footer —— */
.site-footer {
  background: #EEF1F4;
  border-top: 1px solid var(--border-app);
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

@media (min-width: 700px) {
  .site-footer__grid {
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: var(--spacing-xxl);
  }
}

.site-footer__mission {
  margin: var(--spacing-md) 0 0;
  font-size: var(--font-small);
  color: var(--text-secondary);
  max-width: 280px;
  line-height: 1.5;
}

.site-footer__heading {
  margin: 0 0 var(--spacing-md);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-light);
}

.site-footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__links li {
  margin-bottom: var(--spacing-sm);
}

.site-footer__links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-small);
}

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

.site-footer__bottom {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-app);
}

.copyright {
  font-size: 12px;
  color: var(--text-light);
  margin: 0;
}

/* —— Inner pages —— */
.page-header {
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
  text-align: center;
  background: var(--white);
  border-bottom: 1px solid var(--border-app);
}

.page-header h1 {
  font-size: var(--font-large);
  font-weight: 700;
  margin: 0;
  color: var(--primary-dark);
}

.content-block {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--spacing-xxl) var(--spacing-xl);
}

.content-block h2 {
  font-size: var(--font-medium);
  font-weight: 700;
  margin: var(--spacing-xl) 0 var(--spacing-sm);
  color: var(--primary-dark);
}

.content-block h2:first-child {
  margin-top: 0;
}

.content-block p,
.content-block li {
  color: var(--text-secondary);
  margin: 0 0 var(--spacing-regular);
}

.content-block ul {
  padding-left: var(--spacing-xl);
  margin: 0 0 var(--spacing-regular);
}

.content-block a {
  color: var(--primary);
  text-decoration: none;
}

.content-block a:hover {
  text-decoration: underline;
}

.about-app-shot {
  margin: 0 auto var(--spacing-xl);
  max-width: 280px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-app);
}

.about-app-shot img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--primary-dark);
  color: white;
  padding: var(--spacing-regular) var(--spacing-regular) calc(var(--spacing-regular) + env(safe-area-inset-bottom));
  z-index: 1000;
  display: none;
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.15);
}

.cookie-banner.visible {
  display: block;
}

.cookie-banner .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-regular);
}

.cookie-banner p {
  margin: 0;
  font-size: var(--font-small);
  flex: 1;
  min-width: 200px;
}

.cookie-banner a {
  color: var(--primary-light);
}

.cookie-banner .btn {
  flex-shrink: 0;
  background: var(--accent-soft);
  color: var(--primary-dark);
}

.cookie-banner .btn:hover {
  background: var(--white);
}

/* Anchor offset under sticky header */
section[id],
#beta-programme {
  scroll-margin-top: calc(var(--header-h) + 12px);
}