/* ========================================
   Responsive Styles
   ======================================== */

/* Mobile First - Base styles are for mobile */

/* Tablet (768px and up) */
@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
    
    .header {
        padding: var(--spacing-3xl) 0 var(--spacing-2xl);
    }
    
    .logo {
        font-size: var(--font-size-4xl);
    }
    
    .tagline {
        font-size: var(--font-size-xl);
    }
    
    .site-description {
        font-size: var(--font-size-lg);
    }
    
    .filter-tabs {
        justify-content: center;
    }
    
    .map-section {
        height: 40vh;
    }
    
    .sessions-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .modal-content {
        width: 500px;
    }
}

/* Desktop (1024px and up) */
@media (min-width: 1024px) {
    .sessions-list {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .session-card {
        padding: var(--spacing-lg);
    }
    
    .map-section {
        height: 45vh;
    }
}

/* Large Desktop (1440px and up) */
@media (min-width: 1440px) {
    .container {
        max-width: 1400px;
    }
    
    .sessions-list {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Mobile Specific */
@media (max-width: 767px) {
    .header {
        padding: var(--spacing-2xl) 0 var(--spacing-xl);
    }
    
    .logo {
        font-size: var(--font-size-3xl);
    }
    
    .tagline {
        font-size: var(--font-size-lg);
    }
    
    .site-description {
        font-size: var(--font-size-md);
        padding: var(--spacing-md);
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .filter-tabs {
        overflow-x: scroll;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    
    .filter-tabs::-webkit-scrollbar {
        display: none;
    }
    
    .filter-tab {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }
    
    .session-card {
        flex-direction: column;
        padding: var(--spacing-md);
    }
    
    .card-time {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
        min-width: auto;
    }
    
    .card-time .time {
        font-size: var(--font-size-xl);
    }
    
    .card-title {
        font-size: var(--font-size-lg);
    }
    
    .card-address {
        font-size: var(--font-size-sm);
    }
    
    .card-slots {
        justify-content: flex-start;
        margin-top: var(--spacing-sm);
    }
    
    .slot-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .slot-action {
        width: 100%;
    }
    
    .btn-participate {
        width: 100%;
    }
    
    .modal-content {
        width: 95%;
        padding: var(--spacing-lg);
    }
    
    .modal-actions {
        flex-direction: column;
    }
    
    .modal-actions button {
        width: 100%;
    }
}

/* Landscape Mobile */
@media (max-width: 767px) and (orientation: landscape) {
    .map-section {
        height: 50vh;
    }
}

/* Print Styles */
@media print {
    .header,
    .date-filters,
    .map-section,
    .footer,
    .btn {
        display: none;
    }
    
    .session-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Dark Mode Support (Optional) */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #e8eaed;
        --text-secondary: #9aa0a6;
        --text-light: #80868b;
        
        --bg-primary: #202124;
        --bg-secondary: #292a2d;
        --bg-tertiary: #35363a;
        
        --border-color: #5f6368;
    }
    
    .session-card,
    .session-header,
    .session-location,
    .session-setlist,
    .session-slots,
    .modal-content {
        background: var(--bg-primary);
        color: var(--text-primary);
    }
    
    .card-time,
    .slot-item {
        background: var(--bg-tertiary);
    }
}

/* ========================================
   Mobile Performance Optimizations
   ======================================== */

/* Touch Optimization */
@media (hover: none) and (pointer: coarse) {
    .session-card,
    .btn,
    .filter-tab {
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
    }
    
    .session-card:active {
        transform: scale(0.98);
    }
    
    .btn:active {
        transform: scale(0.95);
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

/* Hardware Acceleration */
.session-card,
.spinner,
.modal {
    will-change: transform;
}

/* Image Optimization */
img {
    max-width: 100%;
    height: auto;
    display: block;
}