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

:root {
  --blue-50: #EFF6FF;
  --blue-100: #DBEAFE;
  --blue-500: #3B82F6;
  --blue-600: #2563EB;
  --blue-700: #1D4ED8;
  --blue-900: #1E3A5F;
  --slate-50: #F8FAFC;
  --slate-100: #F1F5F9;
  --slate-200: #E2E8F0;
  --slate-400: #94A3B8;
  --slate-500: #64748B;
  --slate-700: #334155;
  --slate-800: #1E293B;
  --slate-900: #0F172A;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--slate-800);
  background: #FFFFFF;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ─── NAV ─── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--slate-200);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--slate-900);
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  overflow: hidden;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--slate-900);
  color: white;
  padding: 10px 20px;
  border-radius: 12px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.nav-cta svg {
  width: 18px;
  height: 18px;
}

/* ─── FOOTER ─── */
footer {
  padding: 48px 24px;
  text-align: center;
  border-top: 1px solid var(--slate-200);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-text {
  font-size: 14px;
  color: var(--slate-400);
}

.footer-text a {
  color: var(--blue-600);
  text-decoration: none;
}

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

.footer-links a {
  font-size: 14px;
  color: var(--slate-500);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--blue-600);
}

/* ─── SUBPAGE (privacy, terms) ─── */
.page-header {
  padding: 140px 24px 48px;
  text-align: center;
  background: linear-gradient(180deg, var(--blue-50) 0%, #FFFFFF 100%);
}

.page-header h1 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--slate-900);
  margin-bottom: 8px;
}

.page-header .date {
  font-size: 14px;
  color: var(--slate-400);
}

.content {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 100px;
  line-height: 1.75;
  font-size: 16px;
  color: var(--slate-700);
}

.content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--slate-900);
  margin: 48px 0 16px;
  letter-spacing: -0.01em;
}

.content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--slate-800);
  margin: 32px 0 12px;
}

.content p { margin-bottom: 16px; }
.content ul, .content ol { margin-bottom: 16px; padding-left: 24px; }
.content li { margin-bottom: 8px; }
.content a { color: var(--blue-600); text-decoration: none; }
.content a:hover { text-decoration: underline; }
.content strong { color: var(--slate-800); }

/* ─── RESPONSIVE ─── */
@media (max-width: 680px) {
  .footer-inner {
    flex-direction: column;
    gap: 16px;
  }

  .nav-cta span {
    display: none;
  }
}