:root {
    --ksn-primary: #12c8d5;
    --ksn-primary-dark: #047c8a;
    --ksn-bg: #e6fbff;
}

body {
    background: radial-gradient(circle at top left,
        #f0feff 0,
        var(--ksn-bg) 40%,
        #d2f6fb 100%);
    font-family: Roboto, Arial, sans-serif;
}

/* NAVBAR */
.navbar {
    background: linear-gradient(90deg, var(--ksn-primary-dark), #022c3a) !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.navbar-brand span {
    font-weight: 500;
    letter-spacing: 0.06em;
    color: #ECCC91;
}

/* HERO */
.hero-section {
    background: radial-gradient(circle at top left,
        #022c3a 0,
        var(--ksn-primary-dark) 35%,
        #020617 100%);
    color: #ecfeff;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: "";
    position: absolute;
    inset: -40%;
    background:
        radial-gradient(circle at 10% 20%, rgba(18,200,213,0.33) 0, transparent 50%),
        radial-gradient(circle at 80% 0%, rgba(34,211,238,0.3) 0, transparent 55%),
        radial-gradient(circle at 90% 80%, rgba(45,212,191,0.25) 0, transparent 55%);
    opacity: 0.9;
    pointer-events: none;
}

.hero-section > .container {
    position: relative;
    z-index: 1;
}

.hero-badge {
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.75rem;
    background-color: rgba(18, 200, 213, 0.18);
    border: 1px solid rgba(125, 249, 255, 0.85);
    color: #e0ffff;
    backdrop-filter: blur(4px);
}

/* BUTTONS */
.btn-primary {
    background: linear-gradient(135deg, var(--ksn-primary), #22d3ee);
    border: none;
    box-shadow: 0 10px 25px rgba(34, 211, 238, 0.45);
}

.btn-primary:hover,
.btn-primary:focus {
    background: linear-gradient(135deg, #0fb0bd, #06b6d4);
    box-shadow: 0 14px 32px rgba(34, 211, 238, 0.6);
    transform: translateY(-1px);
}

.btn-outline-primary {
    color: var(--ksn-primary-dark);
    border-color: var(--ksn-primary);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    color: #0f172a;
    background-color: #a5f3fc;
    border-color: #a5f3fc;
}

/* Bootstrap helpers override */
.bg-primary {
    background-color: var(--ksn-primary) !important;
}

.text-primary {
    color: var(--ksn-primary) !important;
}

.badge.bg-primary {
    background-color: var(--ksn-primary) !important;
}

/* CARDS */
.card {
    border-radius: 0.9rem;
    border: 1px solid rgba(125, 211, 252, 0.4);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(4px);
}

.card-header {
    border-radius: 0.9rem 0.9rem 0 0 !important;
    background: linear-gradient(135deg, #0f172a, var(--ksn-primary-dark));
    color: #e0faff;
}

/* Špeciálny header pre “Najbližšie podujatie” */
.card-header-event {
    background: linear-gradient(135deg, var(--ksn-primary), #0b7285) !important;
    color: #ffffff !important;
}

.card.shadow-sm {
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.20) !important;
}

/* ARTICLES / accents */
.border-primary {
    border-color: var(--ksn-primary) !important;
}

.border-start.border-primary {
    border-left-color: var(--ksn-primary) !important;
}

.news-card img {
    max-height: 220px;
    object-fit: cover;
}

.section-title {
    border-left: 4px solid var(--ksn-primary);
    padding-left: 0.6rem;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    color: #0f172a;
}

/* Sidebar */
.sidebar-card .list-group-item {
    border: 0;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    background: rgba(255, 255, 255, 0.9);
}

.sidebar-card .list-group-item:last-child {
    border-bottom: 0;
}

/* Links */
a {
    color: var(--ksn-primary-dark);
}

a:hover {
    color: #0e7490;
}

/* FOOTER */
footer {
    background: radial-gradient(circle at top, #022c3a 0, #020617 60%, #000 100%);
    color: #cbd5f5;
    border-top: 1px solid rgba(148, 163, 184, 0.4);
}

footer a {
    color: #5eead4;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
    color: #a5f3fc;
}

@media (max-width: 575px) {
    .card-body {
        flex-direction: column;
    }

    .article-thumb {
        max-width: 100%;
    }
}