/* ─────────────────────────────────────────
   BirthdayAlert — Global Stylesheet
   Clean, minimal, warm
──────────────────────────────────────────── */

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

:root {
  --pink:        #FF6B8A;
  --pink-light:  #FFF0F3;
  --pink-mid:    #FFD6DF;
  --text:        #1A1A1A;
  --text-muted:  #6B7280;
  --bg:          #FFFFFF;
  --bg-soft:     #FAFAFA;
  --border:      #F0F0F0;
  --radius:      16px;
  --radius-sm:   10px;
  --shadow:      0 4px 24px rgba(0,0,0,0.07);
  --shadow-md:   0 8px 40px rgba(0,0,0,0.10);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ─────────────────────────────────── */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* ── HERO ────────────────────────────────── */

.hero {
  max-width: 900px;
  margin: 0 auto;
  padding: 80px 24px 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 56px;
}

.hero-content {
  width: 100%;
  max-width: 560px;
}

.badge {
  display: inline-block;
  background: var(--pink-light);
  color: var(--pink);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.hero-content h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
  color: var(--text);
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.app-store-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--text);
  color: #fff;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  transition: opacity 0.2s, transform 0.15s;
  margin: 0 auto;
}

.app-store-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

/* ── SCREENSHOTS ─────────────────────────── */

.hero-screenshots {
  display: flex;
  gap: 24px;
  align-items: flex-end;
  justify-content: center;
  width: 100%;
}

.phone-frame {
  border-radius: 36px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: #e8e8e8;
  flex: 0 0 auto;
  line-height: 0;
}

.phone-frame:first-child {
  transform: rotate(-1.5deg);
}

.phone-frame:last-child {
  transform: rotate(1.5deg);
}

.phone-frame img {
  width: 220px;
  height: auto;
  display: block;
}

/* ── FEATURES ────────────────────────────── */

.features {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 80px 24px;
}

.section-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.features h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 48px;
  color: var(--text);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: box-shadow 0.2s, transform 0.2s;
}

.feature-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 1.75rem;
  margin-bottom: 14px;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── PRIVACY CALLOUT ─────────────────────── */

.privacy-callout {
  padding: 80px 24px;
}

.privacy-callout-inner {
  display: flex;
  align-items: center;
  gap: 64px;
}

.privacy-text {
  flex: 1;
}

.privacy-text h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
  color: var(--text);
}

.privacy-text p {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 460px;
  margin-bottom: 24px;
  line-height: 1.7;
}

.link-arrow {
  color: var(--pink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: opacity 0.2s;
}

.link-arrow:hover {
  opacity: 0.7;
}

.privacy-icon-wrap {
  flex: 0 0 auto;
  width: 120px;
  height: 120px;
  background: var(--pink-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.privacy-icon {
  font-size: 3rem;
}

/* ── FOOTER ──────────────────────────────── */

.footer {
  border-top: 1px solid var(--border);
  padding: 40px 24px;
}

.footer-inner {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.footer-logo {
  font-weight: 700;
  font-size: 1rem;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.875rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--text);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ── POLICY PAGES ────────────────────────── */

.policy-hero {
  max-width: 680px;
  margin: 0 auto;
  padding: 64px 24px 48px;
}

.policy-hero h1 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.policy-date {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.policy-body {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.policy-body h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 36px;
  margin-bottom: 10px;
  color: var(--text);
}

.policy-body p,
.policy-body li {
  font-size: 0.975rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 10px;
}

.policy-body ul {
  padding-left: 20px;
  margin-bottom: 10px;
}

.policy-body a {
  color: var(--pink);
  text-decoration: none;
}

.policy-body a:hover {
  text-decoration: underline;
}

/* ── RESPONSIVE ──────────────────────────── */

@media (max-width: 768px) {
  .hero {
    padding: 48px 24px 64px;
    gap: 40px;
  }

  .phone-frame img {
    width: 160px;
  }

  .privacy-callout-inner {
    flex-direction: column;
    gap: 32px;
    text-align: center;
  }

  .privacy-text p {
    max-width: none;
    margin: 0 0 24px;
  }

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

@media (max-width: 480px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .phone-frame img {
    width: 130px;
  }

  .phone-frame {
    border-radius: 24px;
  }
}