@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg: #ffffff;
  --surface: #f8f9fa;
  --surface-2: #f0f1f3;
  --text: #1a1a2e;
  --text-dim: #6b7280;
  --blue: #4285F4;
  --cyan: #00E5FF;
  --green: #34A853;
  --yellow: #FBBC05;
  --red: #EA4335;
  --border: #e5e7eb;
  --nav-bg: rgba(255, 255, 255, 0.85);
  --radius: 12px;
}

[data-theme="dark"] {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-2: #22252f;
  --text: #e4e4e7;
  --text-dim: #9ca3af;
  --border: #2a2d3a;
  --nav-bg: rgba(15, 17, 23, 0.85);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background-color 0.3s, color 0.3s;
}

a { color: inherit; text-decoration: none; }

/* Nav */
.nav { position: sticky; top: 0; z-index: 100; background: var(--nav-bg); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.nav-inner { max-width: 1200px; margin: 0 auto; padding: 0.75rem 1.5rem; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.1rem; }
.nav-logo img { height: 32px; }
.nav-logo .logo-placeholder { width: 32px; height: 32px; background: linear-gradient(135deg, var(--blue), var(--cyan)); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 14px; font-weight: 800; }
.nav-links { display: flex; gap: 1.5rem; align-items: center; font-size: 0.9rem; }
.nav-links a { color: var(--text-dim); transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }
.nav-controls { display: flex; gap: 0.75rem; align-items: center; }

/* Buttons */
.btn-cta { background: var(--blue); color: #fff; border: none; padding: 0.5rem 1.25rem; border-radius: 8px; font-weight: 600; font-size: 0.9rem; cursor: pointer; transition: all 0.2s; }
.btn-cta:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-primary { background: var(--blue); color: #fff; border: none; padding: 0.85rem 2rem; border-radius: 10px; font-weight: 700; font-size: 1rem; cursor: pointer; transition: all 0.2s; }
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(66,133,244,0.3); }
.btn-secondary { background: transparent; color: var(--text); border: 2px solid var(--border); padding: 0.85rem 2rem; border-radius: 10px; font-weight: 600; font-size: 1rem; cursor: pointer; transition: all 0.2s; }
.btn-secondary:hover { border-color: var(--blue); color: var(--blue); }
.btn-google { background: #fff; color: #444; border: 1px solid #dadce0; padding: 0 1.5rem; height: 48px; border-radius: 24px; font-weight: 500; font-size: 0.95rem; cursor: pointer; display: inline-flex; align-items: center; gap: 0.75rem; transition: all 0.2s; font-family: 'Inter', sans-serif; box-shadow: 0 1px 3px rgba(0,0,0,0.08); text-decoration: none; }
.btn-google:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.15); background: #f8f9fa; }

/* Controls */
.lang-switch { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 0.25rem 0.5rem; font-size: 0.8rem; color: var(--text-dim); cursor: pointer; font-family: inherit; }
.theme-toggle { background: none; border: none; cursor: pointer; font-size: 1.2rem; padding: 0.25rem; }

/* Typography */
.section-title { text-align: center; font-size: 2rem; font-weight: 700; margin-bottom: 0.5rem; }
.section-subtitle { text-align: center; color: var(--text-dim); margin-bottom: 3rem; font-size: 1.05rem; }
.gradient { background: linear-gradient(135deg, var(--blue), var(--cyan)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* Hamburger (mobile) */
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text); margin: 5px 0; transition: all 0.3s; }
.nav-links.open { display: flex; }

@media (max-width: 768px) {
  .hamburger { display: block; }
  .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--nav-bg); backdrop-filter: blur(12px); flex-direction: column; padding: 1rem 1.5rem; border-bottom: 1px solid var(--border); gap: 1rem; }
  .nav-links.open { display: flex; }
}

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 3rem 0; }
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { color: var(--text-dim); font-size: 0.85rem; }
.footer-links a:hover { color: var(--text); }
.footer-brand { font-size: 0.85rem; color: var(--text-dim); display: flex; align-items: center; gap: 0.5rem; }
.gcp-badge { font-size: 0.75rem; color: var(--text-dim); background: var(--surface); padding: 0.3rem 0.75rem; border-radius: 6px; border: 1px solid var(--border); }