:root {
    --primary-color: #0F2C59;
    --accent-color: #0066CC;
    --text-dark: #1E293B;
    --text-light: #64748B;
    --bg-light: #F8FAFC;
    --white: #FFFFFF;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', sans-serif; color: var(--text-dark); line-height: 1.6; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.bg-light { background-color: var(--bg-light); }

/* NAVBAR */
.navbar { background: var(--white); border-bottom: 1px solid #E2E8F0; position: sticky; top: 0; z-index: 100; padding: 20px 0; }
.nav-container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-weight: 700; font-size: 1.2rem; color: var(--primary-color); }
.logo span { color: var(--accent-color); }
.nav-links { display: flex; list-style: none; gap: 20px; }
.nav-links a { text-decoration: none; color: var(--text-dark); font-weight: 600; font-size: 0.95rem; }

/* HERO */
.hero { background: linear-gradient(135deg, #0F2C59 0%, #1E3A8A 100%); color: var(--white); padding: 100px 0; text-align: center; }
.hero h1 { font-size: 2.5rem; font-weight: 700; max-width: 900px; margin: 0 auto 20px; line-height: 1.2; }
.hero-sub { font-size: 1.2rem; max-width: 750px; margin: 0 auto 30px; opacity: 0.9; }
.hero-cta { display: flex; justify-content: center; gap: 15px; }

/* BUTTONS */
.btn { display: inline-block; padding: 12px 24px; border-radius: 6px; text-decoration: none; font-weight: 600; cursor: pointer; border: none; }
.btn-primary { background: var(--accent-color); color: var(--white); }
.btn-secondary { background: transparent; color: var(--white); border: 2px solid var(--white); }
.btn-large { padding: 16px 32px; font-size: 1rem; }
.btn-full { width: 100%; text-align: center; margin-top: 15px; }

/* GRID & CARDS */
h2 { font-size: 2rem; color: var(--primary-color); text-align: center; margin-bottom: 15px; }
.section-intro { text-align: center; color: var(--text-light); max-width: 700px; margin: 0 auto 40px; }
.grid { display: grid; gap: 30px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.card { background: var(--white); border: 1px solid #E2E8F0; padding: 30px; border-radius: 8px; }
.card-highlight { border-top: 4px solid var(--accent-color); }
.card h3 { color: var(--primary-color); margin-bottom: 10px; }

/* DIAGNOSTIC FORM */
.diagnostic-box { background: var(--white); border: 2px solid var(--accent-color); padding: 40px; border-radius: 12px; max-width: 700px; margin: 0 auto; }
.question-group { margin-bottom: 20px; text-align: left; }
.question-group label { display: block; font-weight: 600; margin-bottom: 8px; }
select, input { width: 100%; padding: 12px; border: 1px solid #CBD5E1; border-radius: 6px; font-size: 1rem; margin-bottom: 10px; }
.contact-inputs { margin-top: 25px; border-top: 1px solid #E2E8F0; padding-top: 20px; }
.result-box { margin-top: 20px; padding: 20px; border-radius: 6px; background: #EFF6FF; border: 1px solid #BFDBFE; text-align: center; }
.hidden { display: none; }

/* ABOUT & LISTS */
.check-list { list-style: none; margin-top: 20px; }
.check-list li { margin-bottom: 12px; padding-left: 25px; position: relative; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--accent-color); font-weight: bold; }
.cta-card { background: var(--primary-color); color: var(--white); padding: 40px; border-radius: 8px; text-align: center; }
.cta-card h3 { color: var(--white); margin-bottom: 15px; }

/* FOOTER */
footer { background: var(--primary-color); color: var(--white); padding: 30px 0; text-align: center; font-size: 0.9rem; border-top: 1px solid rgba(255,255,255,0.1); }
footer a { color: #93C5FD; text-decoration: none; }

@media (max-width: 768px) {
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .hero h1 { font-size: 1.8rem; }
    .nav-links { display: none; }
}