/* ================================================================
   COMMON CSS — shared across all secondary landing pages
   (blog, post, terms, privacy)
================================================================ */

/* ================================================================
   DESIGN TOKENS
================================================================ */
:root {
  --bg: #FFFFFF;
  --surface: #F9FAFB;
  --text: #111827;
  --secondary: #6B7280;
  --accent: #2563EB;
  --accent-hover: #1D4ED8;
  --accent-light: rgba(37,99,235,0.08);
  --accent-border: rgba(37,99,235,0.25);
  --border: #E5E7EB;
  --error: #EF4444;
  --warning: #F59E0B;
  --info: #3B82F6;
  --cta-bg: #111827;
  --cta-text: #FFFFFF;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: 0.25s ease;
  --header-h: 64px;
}
[data-theme="dark"] {
  --bg: #111827;
  --surface: #1F2937;
  --text: #F9FAFB;
  --secondary: #9CA3AF;
  --accent: #3B82F6;
  --accent-hover: #2563EB;
  --accent-light: rgba(59,130,246,0.10);
  --accent-border: rgba(59,130,246,0.25);
  --border: #374151;
  --cta-bg: #FFFFFF;
  --cta-text: #111827;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.4);
}

/* ================================================================
   RESET & BASE
================================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); font-size: 16px; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
img { max-width: 100%; display: block; }

/* ================================================================
   UTILITY
================================================================ */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
@media (min-width: 768px) { .container { padding: 0 32px; } }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 10px;
  font-size: 15px; font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap; cursor: pointer; border: none;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--cta-bg); color: var(--cta-text); box-shadow: 0 4px 14px rgba(0,0,0,0.12); }
.btn-primary:hover { opacity: 0.88; box-shadow: 0 6px 20px rgba(0,0,0,0.18); }
.btn-outline { background: transparent; color: var(--text); border: 1.5px solid var(--border); }
.btn-outline:hover { background: var(--surface); border-color: var(--secondary); }
.btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 8px; }

/* ================================================================
   HEADER
================================================================ */
#header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}
[data-theme="dark"] #header { background: rgba(17,24,39,0.92); }

.header-inner {
  display: flex; align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.logo {
  font-size: 18px; font-weight: 800;
  letter-spacing: -0.02em; flex-shrink: 0;
}
.logo-green { color: #2563EB; font-weight: 800; }
[data-theme="dark"] .logo-green { color: #3B82F6; }

.nav { display: none; align-items: center; gap: 4px; }
@media (min-width: 768px) { .nav { display: flex; } }
.nav-link {
  padding: 8px 14px; border-radius: 8px;
  font-size: 14px; font-weight: 500; color: var(--secondary);
  transition: all var(--transition);
}
.nav-link:hover { color: var(--text); background: var(--surface); }

.header-actions { display: flex; align-items: center; gap: 10px; }
.header-cta { display: none; }
@media (min-width: 640px) { .header-cta { display: inline-flex; } }

.theme-toggle {
  width: 40px; height: 40px; border-radius: 8px;
  background: transparent; border: 1px solid var(--border);
  color: var(--secondary);
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.theme-toggle:hover { background: var(--surface); color: var(--text); }

.lang-dropdown { position: relative; }
.lang-btn {
  height: 40px; border-radius: 8px;
  background: transparent; border: 1px solid var(--border);
  color: var(--secondary);
  padding: 0 10px;
  font-family: inherit; font-size: 13px; font-weight: 600;
  cursor: pointer; outline: none;
  transition: all var(--transition);
  display: flex; align-items: center; gap: 4px;
}
.lang-btn:hover { background: var(--surface); color: var(--text); border-color: var(--secondary); }
.lang-menu {
  position: absolute; top: calc(100% + 6px); right: 0;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 4px;
  box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden; transform: translateY(-4px);
  transition: all 0.15s ease;
  z-index: 200; min-width: 130px;
}
.lang-dropdown.open .lang-menu {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.lang-option {
  display: block; width: 100%;
  padding: 7px 12px; border-radius: 6px;
  font-family: inherit; font-size: 13px; font-weight: 600;
  color: var(--secondary); background: none; border: none;
  cursor: pointer; text-align: left;
  transition: all var(--transition);
}
.lang-option:hover { background: var(--surface); color: var(--text); }
.lang-option.active { color: var(--accent); }

.hamburger {
  display: flex; flex-direction: column; gap: 5px; padding: 8px;
  background: transparent; border: 1px solid var(--border); border-radius: 8px;
}
@media (min-width: 768px) { .hamburger { display: none; } }
.hamburger span {
  display: block; width: 20px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed; top: var(--header-h); left: 0; right: 0;
  background: var(--bg); border-bottom: 1px solid var(--border);
  padding: 20px; transform: translateY(-110%);
  transition: transform 0.3s ease; z-index: 99;
  display: flex; flex-direction: column; gap: 8px;
}
.mobile-menu.open { transform: translateY(0); }
.mobile-menu .nav-link {
  display: block; padding: 14px 16px; font-size: 16px;
  border: 1px solid var(--border); background: var(--surface); border-radius: 8px;
}
.mobile-menu .btn { width: 100%; justify-content: center; margin-top: 4px; }