:root {
  --bg-color: #f8fafc;
  --surface-color: #ffffff;
  --border-color: #e2e8f0;
  
  --text-main: #0f172a;
  --text-muted: #64748b;
  
  --primary-color: #0284c7;
  --primary-hover: #0369a1;
  --accent-color: #10b981;
  --accent-hover: #059669;
  --danger-color: #ef4444;
  --warning-color: #f59e0b;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
}

h1, h2, h3, h4, h5 {
  color: var(--text-main);
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.2;
}

p { color: var(--text-muted); }

/* Components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  background-color: var(--primary-color);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn:hover { background-color: var(--primary-hover); transform: translateY(-1px); }
.btn-secondary { background-color: var(--surface-color); color: var(--text-main); border: 1px solid var(--border-color); }
.btn-secondary:hover { background-color: #f1f5f9; }
.btn-accent { background-color: var(--accent-color); }
.btn-accent:hover { background-color: var(--accent-hover); }

/* Pricing Cards */
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 32px; padding: 40px 0; }
.pricing-card { background: var(--surface-color); border: 1px solid var(--border-color); border-radius: 12px; padding: 32px; display: flex; flex-direction: column; }
.pricing-card.premium { border: 2px solid var(--primary-color); box-shadow: 0 10px 25px -5px rgba(2, 132, 199, 0.1); position: relative; }
.pricing-tag { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--primary-color); color: #fff; padding: 4px 16px; border-radius: 20px; font-size: 12px; font-weight: 700; text-transform: uppercase; }
.price { font-size: 40px; font-weight: 800; color: var(--text-main); margin: 24px 0 8px; }
.price span { font-size: 16px; color: var(--text-muted); font-weight: 500; }

/* Layouts */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.card { background: var(--surface-color); border: 1px solid var(--border-color); border-radius: 10px; padding: 32px; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); }

/* Form Elements */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; color: var(--text-main); font-weight: 600; margin-bottom: 8px; }
.form-control { width: 100%; padding: 12px 16px; background-color: #f8fafc; border: 1px solid var(--border-color); border-radius: 6px; font-size: 14px; color: var(--text-main); outline: none; transition: border-color 0.2s, box-shadow 0.2s; }
.form-control:focus { border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.1); background-color: #ffffff; }

/* Navigation */
.navbar { background: var(--surface-color); border-bottom: 1px solid var(--border-color); padding: 16px 0; position: sticky; top: 0; z-index: 100; }
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 22px; font-weight: 800; color: var(--text-main); text-decoration: none; letter-spacing: -0.5px; }
.logo span { color: var(--primary-color); }
.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a { text-decoration: none; color: var(--text-muted); font-weight: 500; font-size: 15px; transition: color 0.2s; }
.nav-links a:hover { color: var(--text-main); }
.nav-links a.active { color: var(--text-main); font-weight: 600; }

/* Footer */
footer { background: #0f172a; color: #f8fafc; padding: 64px 0 24px; margin-top: 64px; }
footer h4 { color: #fff; margin-bottom: 16px; font-size: 14px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; }
footer p, footer a { color: #94a3b8; text-decoration: none; font-size: 14px; transition: color 0.2s; }
footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-bottom { text-align: center; border-top: 1px solid #1e293b; padding-top: 24px; color: #64748b; font-size: 13px; }