/* === QuCode.in — Quantum Dark Theme === */

:root {
    --qu-bg: #0a0e1a;
    --qu-surface: #111827;
    --qu-surface-2: #1e293b;
    --qu-border: rgba(59, 130, 246, 0.12);
    --qu-glow: rgba(59, 130, 246, 0.25);
    --qu-primary: #3b82f6;
    --qu-cyan: #06b6d4;
    --qu-purple: #8b5cf6;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--qu-bg);
    color: #e2e8f0;
}

/* Text gradient */
.text-gradient {
    background: linear-gradient(135deg, var(--qu-primary), var(--qu-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-purple { color: var(--qu-purple) !important; }
.bg-purple { background-color: var(--qu-purple) !important; }

/* === Navbar === */
.qu-navbar {
    background: rgba(10, 14, 26, 0.85) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--qu-border);
}
.qu-navbar .nav-link {
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 0.75rem !important;
    border-radius: 0.5rem;
    transition: all 0.2s;
}
.qu-navbar .nav-link:hover,
.qu-navbar .nav-link.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--qu-primary) !important;
}
.qu-navbar .dropdown-menu {
    background: var(--qu-surface);
    border: 1px solid var(--qu-border);
    border-radius: 0.75rem;
    padding: 0.5rem;
}
.qu-navbar .dropdown-item {
    border-radius: 0.5rem;
    font-size: 0.875rem;
}

/* === Hero === */
.qu-hero {
    position: relative;
    padding: 8rem 0 5rem;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
    animation: heroShift 15s ease-in-out infinite alternate;
}
@keyframes heroShift {
    0% { transform: scale(1) translate(0, 0); }
    50% { transform: scale(1.05) translate(-2%, 1%); }
    100% { transform: scale(1) translate(1%, -1%); }
}

/* === Ticker === */
.qu-ticker {
    background: var(--qu-surface);
    border-top: 1px solid var(--qu-border);
    border-bottom: 1px solid var(--qu-border);
    overflow: hidden;
    white-space: nowrap;
}
.ticker-track {
    display: inline-flex;
    animation: tickerScroll 60s linear infinite;
    gap: 2rem;
}
.ticker-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.85rem;
    padding: 0.25rem 0;
    flex-shrink: 0;
}
.ticker-item:hover { color: var(--qu-primary); }
@keyframes tickerScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* === Category Cards === */
.qu-category-card {
    background: var(--qu-surface);
    border: 1px solid var(--qu-border);
    border-radius: 0.75rem;
    padding: 1.25rem;
    transition: all 0.3s ease;
    color: #e2e8f0;
}
.qu-category-card:hover {
    transform: translateY(-4px);
    border-color: var(--qu-primary);
    box-shadow: 0 8px 30px var(--qu-glow);
    color: #fff;
}

/* === Opportunity Cards === */
.qu-opp-card {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(12px);
    border: 1px solid var(--qu-border);
    border-radius: 0.75rem;
    padding: 1.25rem;
    transition: all 0.3s ease;
}
.qu-opp-card:hover {
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 0 4px 20px var(--qu-glow);
    transform: translateY(-2px);
}

/* === Listing Card (Opportunities page) === */
.qu-listing-card {
    background: var(--qu-surface);
    border: 1px solid var(--qu-border);
    border-radius: 0.75rem;
    padding: 1.25rem;
    transition: all 0.2s ease;
}
.qu-listing-card:hover {
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 0 2px 15px rgba(59, 130, 246, 0.1);
}

/* === News Cards === */
.qu-news-card {
    background: var(--qu-surface);
    border: 1px solid var(--qu-border);
    border-radius: 0.75rem;
    padding: 1.25rem;
    transition: all 0.3s ease;
}
.qu-news-card:hover {
    border-color: rgba(6, 182, 212, 0.3);
    box-shadow: 0 4px 20px rgba(6, 182, 212, 0.1);
}

/* === Detail Card === */
.qu-detail-card {
    background: var(--qu-surface);
    border: 1px solid var(--qu-border);
    border-radius: 0.75rem;
}

/* === Sidebar Cards === */
.qu-sidebar-card {
    background: var(--qu-surface);
    border: 1px solid var(--qu-border);
    border-radius: 0.75rem;
    padding: 1.25rem;
}

/* === Alt Section === */
.qu-section-alt {
    background: rgba(17, 24, 39, 0.5);
}

/* === Challenge Banner === */
.qu-challenge-banner {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.1));
    border: 1px solid rgba(59, 130, 246, 0.2);
}

/* === CTA Section === */
.qu-cta-section {
    background: linear-gradient(135deg, var(--qu-primary), #2563eb);
}

/* === Contact Form === */
.qu-contact-form {
    background: var(--qu-surface);
    border: 1px solid var(--qu-border);
}

/* === Session Cards === */
.qu-session-card {
    background: var(--qu-surface);
    border: 1px solid var(--qu-border);
    border-radius: 0.75rem;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
}
.qu-session-card:hover {
    border-color: rgba(239, 68, 68, 0.3);
    box-shadow: 0 4px 20px rgba(239, 68, 68, 0.1);
    transform: translateY(-2px);
}
.qu-thumb-wrap {
    position: relative;
    border-radius: 0.5rem;
    overflow: hidden;
    background: #111827;
    aspect-ratio: 16/9;
}
.qu-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s;
}
.qu-thumb-placeholder {
    width: 100%;
    height: 100%;
    background: #1e293b;
}
.qu-session-card:hover .qu-thumb { transform: scale(1.04); }
.qu-play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.35);
    color: #fff;
    font-size: 3rem;
    text-decoration: none;
    opacity: 0;
    transition: opacity 0.2s;
}
.qu-session-card:hover .qu-play-btn { opacity: 1; }
.qu-cohort-badge {
    position: absolute;
    top: 0.5rem;
    left: 0.5rem;
    background: rgba(245, 158, 11, 0.9);
    color: #000;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
}

/* === Footer === */
.qu-footer {
    background: var(--qu-surface);
    border-top: 1px solid var(--qu-border);
}
.social-icon {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.1);
    color: var(--qu-primary);
    text-decoration: none;
    transition: all 0.2s;
    font-size: 1rem;
}
.social-icon:hover {
    background: var(--qu-primary);
    color: #fff;
    transform: translateY(-2px);
}

/* === Hover Glow === */
.hover-glow:hover { color: var(--qu-primary) !important; }

/* === Blog Content === */
.qu-blog-content {
    line-height: 1.8;
    color: #cbd5e1;
}
.qu-blog-content h2 { font-size: 1.5rem; font-weight: 700; margin-top: 2rem; margin-bottom: 0.75rem; color: #e2e8f0; }
.qu-blog-content h3 { font-size: 1.25rem; font-weight: 600; margin-top: 1.5rem; margin-bottom: 0.5rem; color: #e2e8f0; }
.qu-blog-content p { margin-bottom: 1rem; }
.qu-blog-content ul, .qu-blog-content ol { margin-bottom: 1rem; padding-left: 1.5rem; }
.qu-blog-content li { margin-bottom: 0.5rem; }
.qu-blog-content a { color: var(--qu-primary); }
.qu-blog-content a:hover { color: var(--qu-cyan); }

/* === Counter Animation === */
.counter { font-variant-numeric: tabular-nums; }

/* === Forms === */
.form-control:focus, .form-select:focus {
    border-color: var(--qu-primary);
    box-shadow: 0 0 0 0.2rem var(--qu-glow);
}

/* === Responsive === */
@media (max-width: 767px) {
    .qu-hero { padding: 6rem 0 3rem; }
    .qu-hero h1 { font-size: 1.75rem !important; }
    .qu-hero .lead { font-size: 1rem; }
    .qu-ticker { display: none; }
}