/* ============================================
   CSS Variables - Vesmírný motiv
   ============================================ */
:root {
    --color-space-dark: #0a0e27;
    --color-space-darker: #050811;
    --color-space-blue: #1a1f3a;
    --color-moon-yellow: #f4e4bc;
    --color-moon-gold: #d4a574;
    --color-star-white: #ffffff;
    --color-text-light: #f5f5f5;
    --color-text-gray: #d0d0d0;
    --color-accent: #6b9bd1;
    
    --font-primary: 'Space Grotesk', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    --border-radius: 12px;
    --box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --box-shadow-light: 0 4px 16px rgba(0, 0, 0, 0.2);
}

/* ============================================
   Reset & Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-space-dark);
    color: var(--color-text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-moon-yellow);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--color-text-light);
    text-decoration: none;
    font-weight: 400;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--color-moon-yellow);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-moon-yellow);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 5px;
    gap: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-text-light);
    transition: all 0.3s ease;
    border-radius: 2px;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../images/background.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(10, 14, 39, 0.85) 0%,
        rgba(26, 31, 58, 0.75) 50%,
        rgba(10, 14, 39, 0.85) 100%
    );
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    max-width: 800px;
    padding: var(--spacing-xl) var(--spacing-md);
    animation: fadeInUp 1s ease;
}

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

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-moon-yellow);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
}

.hero-subtitle {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-light);
    font-weight: 300;
}

.hero-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

.hero-info p {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.hero-info i {
    color: var(--color-moon-gold);
}

.hero-cta {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-moon-yellow);
    color: var(--color-space-dark);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: var(--box-shadow-light);
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(244, 228, 188, 0.4);
    background: #fff;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.hero-cta-fb {
    background: #1877f2;
    color: white;
}

.hero-cta-fb:hover {
    background: #166fe5;
    box-shadow: 0 6px 20px rgba(24, 119, 242, 0.4);
}

/* ============================================
   Sections
   ============================================ */
.section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../images/background.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    opacity: 0.15;
    z-index: 0;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 1;
}

.content-box {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    color: var(--color-space-dark);
    margin-bottom: var(--spacing-md);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    gap: var(--spacing-sm);
}

.section-title {
    font-size: clamp(1.8rem, 5vw, 2.5rem);
    margin-bottom: 0;
    color: var(--color-space-dark);
    font-weight: 600;
    flex: 1;
}

.share-buttons {
    display: flex;
    gap: var(--spacing-xs);
}

.share-btn {
    background: var(--color-space-blue);
    color: white;
    border: 2px solid var(--color-space-blue);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    box-shadow: 0 2px 8px rgba(26, 31, 58, 0.3);
}

.share-btn:hover {
    background: var(--color-space-dark);
    border-color: var(--color-space-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(26, 31, 58, 0.5);
}

.share-btn:active {
    transform: translateY(0);
}

.lead-text {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-space-blue);
    font-weight: 400;
}

.content-box p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.content-box strong {
    color: var(--color-space-blue);
    font-weight: 600;
}

.content-box i {
    color: var(--color-accent);
    margin-right: var(--spacing-xs);
}

/* ============================================
   Program Items
   ============================================ */
.program-item {
    display: flex;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background: rgba(107, 157, 209, 0.1);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-accent);
}

.program-time {
    font-weight: 600;
    color: var(--color-accent);
    min-width: 150px;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.program-content h3 {
    color: var(--color-space-blue);
    margin-bottom: var(--spacing-xs);
}

.program-theme {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(244, 228, 188, 0.2);
    border-radius: var(--border-radius);
}

.program-theme h3 {
    color: var(--color-space-blue);
    margin-bottom: var(--spacing-sm);
}

.program-time-large {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-accent);
    margin: var(--spacing-md) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.ticket-info {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background: rgba(244, 228, 188, 0.3);
    border-radius: var(--border-radius);
}

.warning-box {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background: rgba(255, 193, 7, 0.15);
    border-left: 4px solid #ffc107;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-space-dark);
}

.warning-box i {
    color: #ff9800;
    font-size: 1.3rem;
}

.warning-box strong {
    color: #e65100;
    font-weight: 600;
}

.ticket-link {
    display: inline-block;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-accent);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.ticket-link:hover {
    background: var(--color-space-blue);
    transform: translateY(-2px);
}

/* ============================================
   Gallery
   ============================================ */
.gallery {
    margin-top: var(--spacing-lg);
}

.gallery h4 {
    margin-bottom: var(--spacing-md);
    color: var(--color-space-blue);
    font-size: 1.3rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.gallery-grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-light);
    aspect-ratio: 4/3;
    background: var(--color-space-dark);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

/* ============================================
   QR Code Section
   ============================================ */
.qr-section {
    margin: var(--spacing-lg) 0;
    text-align: center;
}

.qr-code-link {
    text-decoration: none;
    display: inline-block;
    transition: transform 0.3s ease;
}

.qr-code-link:hover {
    transform: scale(1.05);
}

.qr-code-box {
    display: inline-block;
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: box-shadow 0.3s ease;
    cursor: pointer;
}

.qr-code-link:hover .qr-code-box {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.qr-code {
    width: 200px;
    height: 200px;
    display: block;
}

.qr-code-box p {
    margin-top: var(--spacing-sm);
    color: var(--color-space-dark);
    font-size: 0.9rem;
}

/* ============================================
   Countdown Timer
   ============================================ */
.countdown-container {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, rgba(107, 157, 209, 0.1) 0%, rgba(244, 228, 188, 0.1) 100%);
    border-radius: var(--border-radius);
    text-align: center;
}

.countdown-container h3 {
    color: var(--color-space-blue);
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
}

.countdown-timer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0;
    margin: var(--spacing-md) 0;
    font-family: 'Courier New', monospace;
}

.countdown-item {
    display: flex;
    align-items: center;
    justify-content: center;
}

.countdown-number {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    color: var(--color-space-blue);
    line-height: 1;
    background: var(--color-moon-yellow);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    min-width: 80px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    font-variant-numeric: tabular-nums;
}

.countdown-separator {
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--color-space-blue);
    margin: 0 var(--spacing-xs);
    padding: 0 var(--spacing-xs);
}

.countdown-labels {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
    flex-wrap: wrap;
}

.countdown-label {
    font-size: 0.9rem;
    color: var(--color-space-blue);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    min-width: 80px;
    text-align: center;
}

.countdown-info {
    margin-top: var(--spacing-sm);
    color: var(--color-space-blue);
    font-size: 0.9rem;
    font-style: italic;
}

/* ============================================
   Speaker Bio
   ============================================ */
.speaker-bio {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background: rgba(244, 228, 188, 0.15);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-moon-gold);
}

.speaker-bio h4 {
    color: var(--color-space-blue);
    margin-bottom: var(--spacing-sm);
    font-size: 1.2rem;
}

.speaker-bio p {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.speaker-links {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(26, 31, 58, 0.2);
}

.speaker-links p {
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-space-blue);
}

.speaker-links ul {
    list-style: none;
    padding-left: 0;
}

.speaker-links li {
    margin-bottom: var(--spacing-xs);
}

.speaker-links a {
    color: var(--color-accent);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: color 0.3s ease;
}

.speaker-links a:hover {
    color: var(--color-space-blue);
    text-decoration: underline;
}

.instalace-image {
    margin: var(--spacing-md) 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow-light);
}

.instalace-image img {
    width: 100%;
    height: auto;
    display: block;
}

.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin: var(--spacing-sm) 0;
}

.calendar-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-moon-gold);
    color: var(--color-space-dark);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.calendar-btn:hover {
    background: var(--color-moon-yellow);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-light);
}

.ticket-btn {
    background: var(--color-accent);
    color: white;
}

.ticket-btn:hover {
    background: var(--color-space-blue);
    color: white;
}

.program-content .calendar-btn {
    margin-top: var(--spacing-xs);
}

/* Share Notification */
.share-notification {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--color-space-blue);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    z-index: 10000;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    pointer-events: none;
}

.share-notification.show {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-space-darker);
    padding: var(--spacing-md) 0;
    text-align: center;
    color: var(--color-text-gray);
    position: relative;
    z-index: 1;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(10, 14, 39, 0.98);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.5);
        padding: var(--spacing-md) 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero-info {
        font-size: 1rem;
    }

    .content-box {
        padding: var(--spacing-md);
    }

    .program-item {
        flex-direction: column;
    }

    .program-time {
        min-width: auto;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .gallery-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .share-buttons {
        align-self: flex-end;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .hero-cta {
        width: 100%;
    }

    .action-buttons {
        flex-direction: column;
    }

    .action-buttons .calendar-btn {
        width: 100%;
    }

    .countdown-timer {
        gap: 0;
    }

    .countdown-number {
        min-width: 60px;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .countdown-separator {
        margin: 0 2px;
        padding: 0;
    }

    .countdown-labels {
        gap: var(--spacing-sm);
    }

    .countdown-label {
        min-width: 60px;
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .gallery-grid-4 {
        grid-template-columns: 1fr;
    }

    .hero {
        min-height: 80vh;
    }
}

/* ============================================
   Smooth Scroll Offset
   ============================================ */
html {
    scroll-padding-top: 80px;
}