:root {
    --primary: #1a4a8a; 
    --primary-dark: #1B4965; 
    --accent: #4d91ff;
    --text-light: #ffffff;
    --text-dark: #1a202c;
    --text-muted: #4a5568;
    --bg-light: #f7fafc;
    --radius: 16px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
}

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 4rem;
    background: rgba(27, 73, 101, 0.85); 
    backdrop-filter: blur(12px); 
    z-index: 1000;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-text {
    color: var(--text-light);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-badge {
    background: var(--accent);
    color: white;
    padding: 3px 8px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
}

.nav-links a {
    color: var(--text-light);
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--accent);
}

.btn-outline {
    border: 1px solid rgba(255,255,255,0.5);
    padding: 8px 20px;
    border-radius: 50px;
}

.btn-outline:hover {
    background: white;
    color: var(--primary-dark) !important;
}

.hero-section {
    position: relative;
    height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-image: url('https://images.unsplash.com/photo-1551076805-e1869033e561?q=80&w=2000&auto=format&fit=crop'); 
    background-size: cover;
    background-position: center;
    background-attachment: fixed; 
}

.hero-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, rgba(27, 73, 101, 0.9) 0%, rgba(26, 74, 138, 0.6) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 0 20px;
    color: var(--text-light);
    animation: fadeUp 1s ease;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 20px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}


.hero-actions { display: flex; gap: 15px; justify-content: center; }

.btn-primary, .btn-glass {
    padding: 14px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.btn-primary {
    background: var(--accent);
    color: white;
    box-shadow: 0 10px 20px rgba(77, 145, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 25px rgba(77, 145, 255, 0.4);
}

.btn-glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
}

.btn-glass:hover { background: rgba(255, 255, 255, 0.2); transform: translateY(-3px); }

.about-section {
    padding: 6rem 2rem;
    background: white;
}

.about-container {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.eyebrow {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.about-text h2 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.about-image-card {
    height: 400px;
    border-radius: var(--radius);
    background-image: url('https://images.unsplash.com/photo-1576091160550-2173ff9e5ee5?q=80&w=800&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    box-shadow: 0 20px 40px rgba(27, 73, 101, 0.15);
}

.features-section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.features-header {
    text-align: center;
    margin-bottom: 4rem;
}

.features-header h2 {
    font-size: 2.5rem;
    color: var(--primary-dark);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.feature-card {
    position: relative;
    height: 350px;
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(26, 74, 138, 0.2);
}

.card-ecg { background: url('https://images.unsplash.com/photo-1530497610245-94d3c16cda28?q=80&w=600&auto=format&fit=crop') center/cover; }
.card-protocol { background: url('https://images.unsplash.com/photo-1581091226825-a6a2a5aee158?q=80&w=600&auto=format&fit=crop') center/cover; }
.card-team { background: url('https://images.unsplash.com/photo-1582213782179-e0d53f98f2ca?q=80&w=600&auto=format&fit=crop') center/cover; }
.card-contact { background: url('https://images.unsplash.com/photo-1516321318423-f06f85e504b3?q=80&w=600&auto=format&fit=crop') center/cover; }

.card-content {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: 30px 20px;
    background: linear-gradient(to top, rgba(27, 73, 101, 1) 0%, rgba(27, 73, 101, 0.8) 50%, transparent 100%);
    color: white;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    transition: var(--transition);
}

.feature-card:hover .card-content {
    background: linear-gradient(to top, rgba(27, 73, 101, 1) 0%, rgba(27, 73, 101, 0.9) 70%, rgba(27, 73, 101, 0.4) 100%);
}

.card-content h3 { font-size: 1.5rem; margin-bottom: 10px; }
.card-content p { font-size: 0.95rem; opacity: 0.9; margin-bottom: 15px; }

.card-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.card-link:hover { color: white; }

.site-footer {
    background-color: var(--primary-dark);
    color: rgba(255,255,255,0.7);
    text-align: center;
    padding: 30px 20px;
    font-size: 0.9rem;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .about-container { grid-template-columns: 1fr; }
    .hero-content h1 { font-size: 2.5rem; }
    .nav-links { display: none; }
}