/* ==========================================================================
   Autocross Sachsenberg Design System & Layout
   ========================================================================== */

:root {
    /* Color Palette */
    --color-bg-darkest: #09090b;
    --color-bg-dark: #121216;
    --color-bg-card: rgba(26, 26, 32, 0.85);
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-active: rgba(253, 216, 53, 0.3);
    
    /* Accents */
    --color-accent-primary: #ffd600; /* Racing Yellow */
    --color-accent-primary-hover: #ffea00;
    --color-accent-secondary: #ff5722; /* Warning/Action Orange */
    
    /* Typography */
    --color-text-main: #f4f4f5;
    --color-text-muted: #a1a1aa;
    --color-text-dark: #18181b;
    
    /* System */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-premium: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
    --shadow-glow: 0 0 20px rgba(253, 216, 53, 0.15);
}

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

body {
    background-color: var(--color-bg-darkest);
    color: var(--color-text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* App Layout */
.app-container {
    max-width: 600px; /* Force mobile-friendly preview on desktop */
    margin: 0 auto;
    min-height: 100vh;
    background-color: var(--color-bg-darkest);
    display: flex;
    flex-direction: column;
    position: relative;
    border-left: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.8);
}

/* Header */
.app-header {
    position: relative;
    padding: 3rem 1.5rem 2rem 1.5rem;
    background-image: linear-gradient(180deg, rgba(9,9,11,0.4) 0%, rgba(9,9,11,0.95) 100%), url('IMG_4210.JPG');
    background-size: cover;
    background-position: center;
    text-align: center;
    border-bottom: 2px solid var(--color-accent-primary);
    overflow: hidden;
}

.header-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 30%, var(--color-bg-darkest) 100%);
    pointer-events: none;
}

.header-content {
    position: relative;
    z-index: 1;
}

.badge {
    display: inline-flex;
    align-items: center;
    background-color: var(--color-accent-secondary);
    color: #ffffff;
    font-size: 0.7rem;
    font-weight: 800;
    padding: 0.35rem 0.75rem;
    border-radius: 50px;
    letter-spacing: 1px;
    margin-bottom: 0.8rem;
    animation: pulse 2s infinite;
}

.app-header h1 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.5px;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.accent-text {
    color: var(--color-accent-primary);
    position: relative;
    display: inline-block;
}

.event-date {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* Tab Navigation */
.tab-navigation {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    background-color: rgba(9, 9, 11, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: 0 0.5rem;
}

.tab-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 0.2rem;
    background: none;
    border: none;
    outline: none;
    color: var(--color-text-muted);
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-smooth);
    border-bottom: 3px solid transparent;
    gap: 4px;
}

.tab-icon {
    width: 20px;
    height: 20px;
    opacity: 0.7;
    transition: var(--transition-smooth);
}

.tab-btn:hover {
    color: var(--color-text-main);
}

.tab-btn.active {
    color: var(--color-accent-primary);
    border-bottom-color: var(--color-accent-primary);
}

.tab-btn.active .tab-icon {
    opacity: 1;
    transform: scale(1.1);
}

/* Main Content panels */
.main-content {
    flex: 1;
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
}

.tab-panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-panel.active {
    display: block;
}

/* Custom PDF Viewer Section */
.offline-banner {
    background-color: rgba(255, 87, 34, 0.15);
    border: 1px solid var(--color-accent-secondary);
    border-radius: var(--radius-md);
    padding: 0.8rem 1rem;
    margin-bottom: 1rem;
}

.offline-banner-content {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: #ff8a65;
}

.banner-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.pdf-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.6rem 0.8rem;
    margin-bottom: 1rem;
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-premium);
}

.control-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.control-btn {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    color: var(--color-text-main);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.control-btn svg {
    width: 18px;
    height: 18px;
}

.control-btn:hover:not(:disabled) {
    background-color: var(--color-accent-primary);
    color: var(--color-text-dark);
    border-color: var(--color-accent-primary);
}

.control-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.action-btn-link {
    text-decoration: none;
}

.page-indicator, .zoom-value {
    font-size: 0.85rem;
    font-weight: 600;
    min-width: 50px;
    text-align: center;
}

.divider {
    width: 1px;
    height: 24px;
    background-color: var(--color-border);
    margin: 0 4px;
}

/* PDF Viewer Canvas Container */
.pdf-viewer-container {
    position: relative;
    background-color: #1a1a20;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: auto;
    min-height: 400px;
    max-height: 70vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    box-shadow: var(--shadow-premium), var(--shadow-glow);
    padding: 10px;
}

#pdf-render-canvas {
    max-width: 100%;
    height: auto !important;
    display: block;
    border-radius: var(--radius-sm);
    box-shadow: 0 8px 24px rgba(0,0,0,0.5);
    transform-origin: top center;
    transition: transform 0.2s ease;
}

/* Loader Overlay */
.loader-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-bg-dark);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: var(--radius-lg);
    gap: 15px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-border);
    border-top: 4px solid var(--color-accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loader-overlay p {
    font-weight: 500;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Swipe hint */
.swipe-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 0.8rem;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    font-weight: 500;
    text-align: center;
    opacity: 0.7;
}

.swipe-hint svg {
    width: 14px;
    height: 14px;
    animation: horizontalSwipe 2s infinite ease-in-out;
}

/* Zeitplan Layout */
.section-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.3rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--color-accent-primary);
}

.section-subtitle {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.day-group {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-premium);
}

.day-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1.2rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.6rem;
}

.day-tag {
    font-size: 0.65rem;
    font-weight: 800;
    background-color: rgba(255,255,255,0.08);
    color: var(--color-text-main);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    text-transform: uppercase;
}

.day-tag.primary {
    background-color: var(--color-accent-primary);
    color: var(--color-text-dark);
}

.day-header h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
}

/* Timeline vertical layout */
.timeline {
    position: relative;
    padding-left: 20px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 4px;
    top: 5px;
    bottom: 5px;
    width: 2px;
    background-color: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-bottom: 1.2rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -20px;
    top: 6px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--color-border);
    border: 2px solid var(--color-bg-dark);
    transition: var(--transition-smooth);
}

.timeline-item.highlight::before {
    background-color: var(--color-accent-primary);
    box-shadow: 0 0 8px var(--color-accent-primary);
}

.timeline-item.highlight-orange::before {
    background-color: var(--color-accent-secondary);
    box-shadow: 0 0 8px var(--color-accent-secondary);
}

.time {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-accent-primary);
    margin-bottom: 0.15rem;
}

.timeline-item.highlight-orange .time {
    color: var(--color-accent-secondary);
}

.event-details h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text-main);
}

.event-details p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* Info Cards */
.info-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.2rem;
    margin-bottom: 1.2rem;
    display: flex;
    gap: 15px;
    box-shadow: var(--shadow-premium);
}

.card-icon {
    background-color: rgba(253, 216, 53, 0.1);
    color: var(--color-accent-primary);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.card-icon svg {
    width: 22px;
    height: 22px;
}

.card-icon.warning-icon {
    background-color: rgba(255, 87, 34, 0.1);
    color: var(--color-accent-secondary);
}

.card-icon.sponsor-icon {
    background-color: rgba(0, 230, 118, 0.1);
    color: #00e676;
}

.card-content {
    flex: 1;
}

.card-content h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
}

.card-content p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.address-box {
    background-color: rgba(0,0,0,0.2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.8rem;
    margin: 0.8rem 0;
    font-size: 0.8rem;
    color: var(--color-text-main);
    font-family: monospace;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: var(--color-accent-primary);
    color: var(--color-text-dark);
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
}

.action-btn:hover {
    background-color: var(--color-accent-primary-hover);
    transform: translateY(-1px);
}

.btn-icon {
    width: 16px;
    height: 16px;
}

.safety-list {
    margin-top: 0.6rem;
    list-style-type: none;
}

.safety-list li {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    position: relative;
    padding-left: 15px;
    margin-bottom: 0.4rem;
}

.safety-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-accent-secondary);
    font-weight: bold;
}

/* PWA Banner */
.pwa-banner {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 32px);
    max-width: 568px;
    background-color: #1e1e24;
    border: 1px solid var(--color-accent-primary);
    border-radius: var(--radius-lg);
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    z-index: 1000;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.pwa-banner.hidden {
    display: none;
}

.pwa-content {
    flex: 1;
}

.pwa-title {
    display: block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-text-main);
}

.pwa-desc {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.pwa-install-btn {
    background-color: var(--color-accent-primary);
    color: var(--color-text-dark);
    font-weight: 700;
    font-size: 0.8rem;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.pwa-install-btn:hover {
    background-color: var(--color-accent-primary-hover);
}

.pwa-close-btn {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 1rem;
    cursor: pointer;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 2rem 1.5rem;
    border-top: 1px solid var(--color-border);
    margin-top: auto;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.footer-links {
    margin-top: 0.6rem;
}

.footer-links a {
    color: var(--color-accent-primary);
    text-decoration: none;
}

/* Utilities / Animations */
.hidden {
    display: none !important;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 87, 34, 0.7);
    }
    70% {
        transform: scale(1.02);
        box-shadow: 0 0 0 8px rgba(255, 87, 34, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 87, 34, 0);
    }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
    from { transform: translate(-50%, 100px); opacity: 0; }
    to { transform: translate(-50%, 0); opacity: 1; }
}

@keyframes horizontalSwipe {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(-4px); }
}

/* Responsive adjustments */
@media (max-width: 480px) {
    .app-header h1 {
        font-size: 1.8rem;
    }
    
    .tab-btn span {
        font-size: 0.7rem;
    }
    
    .pdf-controls {
        flex-direction: column;
        gap: 10px;
    }
    
    .control-group {
        width: 100%;
        justify-content: center;
    }
    
    .divider {
        display: none;
    }
}