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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
    color: #102542;
    background-color: #f5f7fb;
}

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

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */

.top-bar {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(16px);
    background: rgba(245, 247, 251, 0.9);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.top-bar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo-block {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, #00b4ff, #0077ff);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.3rem;
    box-shadow: 0 10px 25px rgba(0, 119, 255, 0.4);
}

.logo-text {
    font-size: 1.1rem;
}

.nav {
    display: flex;
    gap: 1.5rem;
    font-size: 0.95rem;
}

.nav a {
    position: relative;
    padding-bottom: 2px;
}

.nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0%;
    height: 2px;
    background: #0077ff;
    transition: width 0.2s ease-out;
}

.nav a:hover::after {
    width: 100%;
}

/* Hero */

.hero {
    background: radial-gradient(circle at top left, #00b4ff 0, #102542 45%, #050816 100%);
    color: white;
    padding: 5rem 0 4rem;
}

.hero-inner {
    display: flex;
    align-items: center;
    min-height: 260px;
}

.hero-text h1 {
    font-size: clamp(2.8rem, 5vw, 3.5rem);
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.hero-subtitle {
    margin-top: 1rem;
    font-size: 1.1rem;
    max-width: 26rem;
    opacity: 0.9;
}

.hero-contact {
    margin-top: 1.8rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.4rem;
    border-radius: 999px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: transform 0.1s ease-out, box-shadow 0.1s ease-out, background 0.15s ease-out;
}

.btn.primary {
    background: #ffffff;
    color: #102542;
    box-shadow: 0 12px 30px rgba(0,0,0,0.35);
}

.btn.secondary {
    background: transparent;
    color: #ffffff;
    border-color: rgba(255,255,255,0.6);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 16px 32px rgba(0,0,0,0.4);
}

/* Sections */

.section {
    padding: 3.5rem 0;
}

.section-light {
    background: #ffffff;
}

.section h2 {
    font-size: 1.6rem;
    margin-bottom: 1.8rem;
}

/* Cards */

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1.5rem;
}

.card {
    background: #ffffff;
    border-radius: 1rem;
    padding: 1.5rem 1.6rem;
    box-shadow: 0 12px 35px rgba(15, 23, 42, 0.08);
    border: 1px solid rgba(148, 163, 184, 0.2);
}

.card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.05rem;
}

/* Partneri */

.partners {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.partner {
    background: #f5f7fb;
    border-radius: 0.75rem;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: #102542;
    border: 1px dashed rgba(148, 163, 184, 0.8);
}

.note {
    font-size: 0.9rem;
    color: #6b7280;
}

/* Kontakt */

.contact {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.contact-list {
    list-style: none;
    display: grid;
    gap: 0.15rem;
}

.contact-list a {
    color: #0077ff;
}

/* Footer */

.footer {
    border-top: 1px solid rgba(148, 163, 184, 0.4);
    padding: 1rem 0 1.5rem;
    background: #f9fafb;
    font-size: 0.85rem;
    color: #6b7280;
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.5rem;
}

/* Responsive */

@media (max-width: 700px) {
    .top-bar .container {
        justify-content: space-between;
    }
    .nav {
        display: none;
    }
    .hero {
        padding-top: 4.2rem;
    }
}