/* ═══════════════════════════════════════════════════════════════════════
   OneOne Landing Page — Design System & Styles
   Fonts: Manrope (UI) + Noto Serif (display)
   Palette: Rosewood #7C5357 · #E8B4B8 · #FBF9F8
   ═══════════════════════════════════════════════════════════════════════ */

/* ─── RESET & BASE ─── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  /* Brand */
  --primary: #7C5357;
  --primary-light: #9B6F72;
  --primary-container: #E8B4B8;
  --primary-container-light: #FFD9DD;
  --secondary: #755A30;
  --secondary-container: #FDD7A3;

  /* Surfaces */
  --surface: #FBF9F8;
  --surface-container: #F6F3F2;
  --surface-container-low: #EFECEA;
  --surface-card: #FFFFFF;
  --on-surface: #1B1C1C;
  --on-surface-variant: #605E5C;
  --outline: #827474;
  --outline-variant: #D4C2C3;

  /* Misc */
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-xl: 36px;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 24px -4px rgba(0,0,0,0.06);
  --shadow-lg: 0 16px 48px -8px rgba(0,0,0,0.08);
  --shadow-glow: 0 0 40px rgba(124,83,87,0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #EEB9BD;
    --primary-light: #D4A0A4;
    --primary-container: #6B4448;
    --primary-container-light: #8B5E62;
    --surface: #1A1A1A;
    --surface-container: #212121;
    --surface-container-low: #2C2C2C;
    --surface-card: #2C2C2C;
    --on-surface: #E6E1E1;
    --on-surface-variant: #C3C0BE;
    --outline: #9E8C8D;
    --outline-variant: #504444;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
    --shadow-md: 0 8px 24px -4px rgba(0,0,0,0.3);
    --shadow-lg: 0 16px 48px -8px rgba(0,0,0,0.4);
    --shadow-glow: 0 0 40px rgba(238,185,189,0.08);
  }
}

html {
  font-family: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  color: var(--on-surface);
  background: var(--surface);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--primary); text-decoration: none; }
img { display: block; max-width: 100%; }

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 15px;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-full);
  padding: 14px 28px;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-container-light), var(--primary));
  color: #fff;
  box-shadow: 0 4px 16px rgba(124,83,87,0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(124,83,87,0.35);
}

.btn-lg { padding: 18px 36px; font-size: 17px; }

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--outline-variant);
}
.btn-outline:hover {
  background: var(--primary-container);
  color: var(--on-surface);
  border-color: var(--primary-container);
}

.btn-ghost {
  background: transparent;
  color: var(--primary);
  padding: 12px 24px;
  font-size: 14px;
}
.btn-ghost:hover { background: var(--surface-container); }

/* ─── NAV BAR ─── */
.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 12px 24px;
  transition: var(--transition);
}
.nav-bar.scrolled {
  background: rgba(251,249,248,0.75);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--outline-variant);
  box-shadow: var(--shadow-sm);
}
@media (prefers-color-scheme: dark) {
  .nav-bar.scrolled {
    background: rgba(26,26,26,0.8);
    border-bottom-color: var(--outline-variant);
  }
}

.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.nav-heart {
  font-size: 22px;
  color: var(--primary);
  animation: heartPulse 2s ease-in-out infinite;
}

.nav-brand {
  font-family: 'Noto Serif', serif;
  font-style: italic;
  font-size: 20px;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.nav-cta {
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 14px;
  color: var(--primary);
  padding: 10px 22px;
  border-radius: var(--radius-full);
  background: var(--surface-container);
  transition: var(--transition);
}
.nav-cta:hover {
  background: var(--primary-container);
  color: var(--on-surface);
}

/* ─── HERO ─── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero-bg-orbs {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
}
.orb-1 {
  width: 500px; height: 500px;
  background: var(--primary-container);
  top: -150px; right: -100px;
  animation: orbFloat 8s ease-in-out infinite;
}
.orb-2 {
  width: 400px; height: 400px;
  background: var(--secondary-container);
  bottom: -100px; left: -100px;
  animation: orbFloat 10s ease-in-out infinite reverse;
}
.orb-3 {
  width: 300px; height: 300px;
  background: var(--primary);
  top: 40%; left: 50%;
  opacity: 0.08;
  animation: orbFloat 12s ease-in-out infinite 2s;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-full);
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--on-surface-variant);
  margin-bottom: 28px;
}
.hero-badge-dot {
  width: 7px; height: 7px;
  background: #4CAF50;
  border-radius: 50%;
  animation: dotPulse 2s ease-in-out infinite;
}

.hero-title {
  font-family: 'Noto Serif', serif;
  font-size: clamp(40px, 7vw, 72px);
  font-weight: 400;
  line-height: 1.1;
  color: var(--on-surface);
  margin-bottom: 24px;
}
.hero-title em {
  color: var(--primary);
  font-style: italic;
}

.hero-subtitle {
  font-size: clamp(16px, 2.5vw, 20px);
  line-height: 1.6;
  color: var(--on-surface-variant);
  margin-bottom: 40px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.hero-ctas { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.cta-group { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.cta-hint {
  font-size: 13px;
  color: var(--on-surface-variant);
}
.cta-hint a { text-decoration: underline; }
.cta-stores { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

/* ─── HERO PHONE MOCKUP ─── */
.hero-visual {
  margin-top: 56px;
  display: flex;
  justify-content: center;
}

.hero-phone {
  width: 280px;
  height: 540px;
  background: var(--surface-container);
  border-radius: 36px;
  border: 3px solid var(--outline-variant);
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  position: relative;
}

.phone-screen {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--surface);
}

.phone-status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--on-surface);
}
.phone-notch {
  width: 80px;
  height: 24px;
  background: var(--on-surface);
  border-radius: 12px;
  opacity: 0.85;
}

.phone-content {
  flex: 1;
  padding: 16px 20px;
}
.phone-greeting {
  font-family: 'Noto Serif', serif;
  font-size: 20px;
  color: var(--on-surface);
}
.phone-name {
  font-family: 'Noto Serif', serif;
  font-size: 17px;
  color: var(--primary);
  font-style: italic;
  margin-bottom: 16px;
}

.phone-card {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 20px;
  height: 220px;
  position: relative;
  overflow: hidden;
  margin-bottom: 20px;
}
.phone-card-gradient {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100px;
  background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
}
.phone-card-info {
  position: absolute;
  bottom: 16px;
  left: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.phone-days {
  font-size: 11px;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  background: rgba(255,255,255,0.15);
  padding: 4px 10px;
  border-radius: 10px;
  width: fit-content;
}
.phone-couple {
  font-family: 'Noto Serif', serif;
  font-size: 15px;
  color: #fff;
}
.phone-status {
  font-size: 10px;
  color: rgba(255,255,255,0.8);
  display: flex;
  align-items: center;
  gap: 4px;
}
.status-dot {
  width: 6px; height: 6px;
  background: #4CAF50;
  border-radius: 50%;
  display: inline-block;
}

.phone-actions {
  display: flex;
  justify-content: space-around;
}
.phone-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.phone-action span { font-size: 22px; }
.phone-action small {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: var(--primary);
}

/* ─── iOS INSTALL MODAL ─── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.modal-overlay.active { display: flex; }

.modal {
  background: var(--surface-card);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  max-width: 420px;
  width: 100%;
  position: relative;
  box-shadow: var(--shadow-lg);
  animation: modalSlideUp 0.4s var(--transition);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  font-size: 28px;
  color: var(--on-surface-variant);
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}
.modal-close:hover { background: var(--surface-container); }

.modal-title {
  font-family: 'Noto Serif', serif;
  font-size: 22px;
  margin-bottom: 8px;
  color: var(--on-surface);
}
.modal-desc {
  font-size: 14px;
  color: var(--on-surface-variant);
  margin-bottom: 28px;
  line-height: 1.5;
}

.install-steps { display: flex; flex-direction: column; gap: 16px; }
.install-step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.step-number {
  width: 32px;
  height: 32px;
  min-width: 32px;
  background: var(--primary-container);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}
.step-content strong {
  display: block;
  font-size: 15px;
  margin-bottom: 2px;
  color: var(--on-surface);
}
.step-content p {
  font-size: 13px;
  color: var(--on-surface-variant);
  line-height: 1.4;
}
.share-icon {
  display: inline-flex;
  background: var(--surface-container);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
}

/* ─── FEATURES ─── */
.features {
  padding: 120px 0;
  background: var(--surface-container);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 16px;
}
.section-title {
  font-family: 'Noto Serif', serif;
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 400;
  line-height: 1.2;
  color: var(--on-surface);
  margin-bottom: 16px;
}
.section-subtitle {
  font-size: 17px;
  color: var(--on-surface-variant);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.5;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--surface-card);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-container);
}
.feature-icon {
  font-size: 36px;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-family: 'Noto Serif', serif;
  font-size: 20px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--on-surface);
}
.feature-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--on-surface-variant);
}

/* ─── HOW IT WORKS ─── */
.how-it-works {
  padding: 120px 0;
}

.steps-row {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.step-card {
  flex: 1;
  min-width: 240px;
  max-width: 300px;
  text-align: center;
  padding: 32px 24px;
}
.step-num {
  font-family: 'Noto Serif', serif;
  font-size: 40px;
  font-weight: 600;
  color: var(--primary-container);
  margin-bottom: 16px;
}
.step-card h3 {
  font-family: 'Noto Serif', serif;
  font-size: 19px;
  margin-bottom: 8px;
  color: var(--on-surface);
}
.step-card p {
  font-size: 14px;
  line-height: 1.5;
  color: var(--on-surface-variant);
}

.step-connector {
  font-size: 24px;
  color: var(--outline-variant);
  padding-top: 48px;
}
@media (max-width: 768px) {
  .step-connector { display: none; }
}

/* ─── FINAL CTA ─── */
.final-cta {
  padding: 80px 0 120px;
}
.cta-card {
  position: relative;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-xl);
  padding: 80px 48px;
  text-align: center;
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}
.cta-bg-heart {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 300px;
  color: rgba(255,255,255,0.04);
  pointer-events: none;
  animation: heartPulse 3s ease-in-out infinite;
}
.cta-card h2 {
  font-family: 'Noto Serif', serif;
  font-size: clamp(28px, 5vw, 40px);
  color: #fff;
  margin-bottom: 12px;
  position: relative;
}
.cta-card p {
  font-size: 17px;
  color: rgba(255,255,255,0.85);
  margin-bottom: 32px;
  position: relative;
}
.cta-card .btn-primary {
  background: rgba(255,255,255,0.2);
  border: 1.5px solid rgba(255,255,255,0.4);
  color: #fff;
  position: relative;
}
.cta-card .btn-primary:hover {
  background: rgba(255,255,255,0.3);
}

/* ─── FOOTER ─── */
.footer {
  background: var(--surface-container);
  border-top: 1px solid var(--outline-variant);
  padding: 48px 0 32px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 32px;
  margin-bottom: 32px;
}
.footer-brand { display: flex; flex-direction: column; gap: 4px; }
.footer-brand .nav-heart, .footer-brand .nav-brand { display: inline; }
.footer-tagline {
  font-size: 13px;
  color: var(--on-surface-variant);
  margin-top: 4px;
}
.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--on-surface-variant);
  transition: var(--transition);
}
.footer-links a:hover { color: var(--primary); }
.footer-legal {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.footer-legal a {
  font-size: 12px;
  color: var(--outline);
  transition: var(--transition);
}
.footer-legal a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--outline-variant);
  padding-top: 24px;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--on-surface-variant);
}

/* ─── REVEAL ANIMATION ─── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── KEYFRAMES ─── */
@keyframes heartPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}

@keyframes dotPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(30px, -20px); }
  66% { transform: translate(-20px, 20px); }
}

@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(32px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ─── RESPONSIVE ─── */
@media (max-width: 600px) {
  .hero { padding: 100px 20px 60px; }
  .hero-phone { width: 240px; height: 460px; }
  .phone-card { height: 180px; }
  .features, .how-it-works { padding: 80px 0; }
  .cta-card { padding: 56px 28px; }
  .feature-grid { grid-template-columns: 1fr; }
  .modal { padding: 28px 20px; }
}