:root {
  --primary: #0284c7;
  --primary-dark: #0369a1;
  --secondary: #0f172a;
  --accent: #22c55e;
  --surface: #ffffff;
  --bg-subtle: #f8fafc;
  --border: #e2e8f0;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --radius: 8px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; color: var(--text-main); background: #fff; line-height: 1.6; }
.container { width: 90%; max-width: 1200px; margin: 0 auto; }

/* Top notification */
.topbar { background: var(--secondary); color: #fff; font-size: 0.85rem; padding: 8px 0; }
.topbar .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.topbar a { color: #38bdf8; text-decoration: none; }

/* Header & Nav */
.header { position: sticky; top: 0; background: var(--surface); border-bottom: 1px solid var(--border); z-index: 100; box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { font-size: 1.4rem; font-weight: 700; color: var(--secondary); text-decoration: none; }
.logo span { color: var(--primary); }
.nav-links { display: flex; list-style: none; gap: 20px; align-items: center; }
.nav-links a { text-decoration: none; color: var(--text-main); font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--primary); }

.btn { display: inline-block; padding: 10px 20px; border-radius: var(--radius); text-decoration: none; font-weight: 600; cursor: pointer; border: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-whatsapp { background: var(--accent); color: #fff; }

/* Hero */
.hero { padding: 80px 0; background: linear-gradient(180deg, #f0f9ff 0%, #fff 100%); text-align: center; }
.hero h1 { font-size: 2.5rem; margin-bottom: 16px; color: var(--secondary); }
.hero p { font-size: 1.15rem; color: var(--text-muted); max-width: 650px; margin: 0 auto 28px; }

/* Services */
.section { padding: 70px 0; }
.section-title { text-align: center; margin-bottom: 45px; }
.section-title h2 { font-size: 2rem; color: var(--secondary); margin-bottom: 8px; }
.section-title p { color: var(--text-muted); }

.grid-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.card { background: var(--surface); border: 1px solid var(--border); padding: 24px; border-radius: var(--radius); transition: transform 0.2s, box-shadow 0.2s; }
.card:hover { transform: translateY(-4px); box-shadow: 0 10px 15px -3px rgba(0,0,0,0.07); }
.card h3 { font-size: 1.25rem; margin-bottom: 10px; color: var(--secondary); }
.card p { color: var(--text-muted); font-size: 0.95rem; }

/* Contact Section */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info { background: var(--bg-subtle); padding: 30px; border-radius: var(--radius); }
.contact-info h3 { margin-bottom: 16px; }
.contact-item { margin-bottom: 16px; }
.contact-item span { display: block; font-weight: 600; color: var(--secondary); }

.contact-form { display: flex; flex-direction: column; gap: 14px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.9rem; font-weight: 600; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 0.95rem;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.alert-box { padding: 12px; border-radius: var(--radius); display: none; font-size: 0.95rem; margin-bottom: 10px; }
.alert-success { background: #dcfce7; color: #15803d; border: 1px solid #bbf7d0; }
.alert-error { background: #fee2e2; color: #b91c1c; border: 1px solid #fecaca; }

footer { background: var(--secondary); color: #94a3b8; padding: 40px 0 20px; font-size: 0.9rem; }
footer a { color: #cbd5e1; text-decoration: none; }
.footer-bottom { border-top: 1px solid #334155; margin-top: 30px; padding-top: 20px; text-align: center; }

@media (max-width: 768px) {
  .contact-layout { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}