:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --secondary: #1e293b;
    --light: #f8fafc;
    --dark: #0f172a;
    --text: #334155;
    --bg: #ffffff;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4 { color: var(--dark); line-height: 1.2; }
.text-white, .text-white h2 { color: #fff !important; }
.text-left { text-align: left !important; }

/* Navbar */
.navbar {
    position: fixed;
    top: 0; width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: var(--transition);
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}
.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
}
.logo span {
    color: var(--primary);
}
.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}
.nav-links a {
    font-weight: 500;
    transition: var(--transition);
}
.nav-links a:hover {
    color: var(--primary);
}
.hamburger {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.8)), url('https://images.unsplash.com/photo-1558002038-1055907df827?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
    color: #fff;
    text-align: center;
    padding-top: 70px;
}
.hero-content {
    max-width: 800px;
    margin: 0 auto;
}
.hero h1 {
    font-size: 3.5rem;
    color: #fff;
    margin-bottom: 1rem;
}
.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: #cbd5e1;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-secondary { background: rgba(255,255,255,0.1); border-color: #fff; color: #fff; margin-left: 10px; }
.btn-secondary:hover { background: #fff; color: var(--dark); transform: translateY(-2px); }
.btn-sm { padding: 8px 16px; font-size: 0.9rem; margin-top: 15px; }
.btn-outline { background: transparent; border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }

/* Sections */
.section { padding: 80px 0; }
.section-title { font-size: 2.5rem; text-align: center; margin-bottom: 1rem; }
.section-subtitle { text-align: center; margin-bottom: 3rem; color: #64748b; font-size: 1.1rem; }
.bg-light { background: var(--light); }
.bg-dark { background: var(--secondary); }

/* Grid & Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}
.card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    text-align: center;
    transition: var(--transition);
    border-bottom: 3px solid transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    border-color: var(--primary);
}
.card-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
    background: rgba(14, 165, 233, 0.1);
    width: 80px;
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
}
.card h3 { margin-bottom: 15px; }

/* Video Embed Wrapper */
.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 ratio */
    height: 0;
    overflow: hidden;
    width: 100%;
    border-radius: 8px;
    margin-top: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* O nas */
.o-nas-flex { display: flex; align-items: center; gap: 50px; }
.o-nas-text { flex: 1; }
.check-list { list-style: none; margin-top: 20px; }
.check-list li { margin-bottom: 10px; display: flex; align-items: center; gap: 10px; font-weight: 500; }
.check-list i { color: var(--primary); }

/* Kontakt */
.contact-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); 
    gap: 30px; 
    margin-top: 40px;
}
.info-item { 
    background: rgba(255,255,255,0.05); 
    border-radius: 10px; 
    transition: var(--transition);
    border: 1px solid rgba(255,255,255,0.05);
}
.info-item:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.2);
}
.contact-link {
    display: flex;
    flex-direction: column; 
    align-items: center; 
    text-align: center; 
    padding: 30px 20px; 
    width: 100%;
    height: 100%;
    cursor: pointer;
}
.contact-link i { 
    font-size: 2rem; 
    color: var(--primary); 
    margin-bottom: 20px;
    transition: var(--transition);
}
.info-item:hover .contact-link i {
    transform: scale(1.1);
}
.contact-link h4 {
    color: #fff;
    margin-bottom: 10px;
    font-size: 1.2rem;
}
.contact-link p {
    color: #cbd5e1;
    transition: var(--transition);
}
.info-item:hover .contact-link p {
    color: #fff;
}

/* Footer */
footer { background: var(--dark); padding: 30px 0; color: #94a3b8; border-top: 1px solid rgba(255,255,255,0.1); }
.footer-flex { display: flex; justify-content: space-between; align-items: center; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { transition: var(--transition); }
.footer-links a:hover { color: #fff; }

/* Animations */
.animate-fade-in-up {
    animation: fadeInUp 1s ease forwards;
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}
.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        position: absolute; right: 0; top: 70px; background: #fff;
        flex-direction: column; width: 100%; text-align: center; gap: 0;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        display: none;
    }
    .nav-links.active { display: flex; }
    .nav-links li { padding: 15px 0; border-bottom: 1px solid #f1f5f9; }
    .hamburger { display: block; }
    .hero h1 { font-size: 2.5rem; }
    .o-nas-flex { flex-direction: column; }
    .footer-flex { flex-direction: column; gap: 15px; text-align: center; }
}