/* ============================================
   RESPONSIVE DESIGN - Media Queries
   Mobile, tablet, desktop breakpoints
   ============================================ */

/* ====== MOBILE ANIMATION KEYFRAMES ====== */
@keyframes scaleInMobile {
    from {
        opacity: 0;
        transform: translateX(-50%) scale(0.8);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) scale(1);
    }
}

/* ====== MOBILE STYLES (< 600px) ====== */
@media (max-width: 599px) {
    :root {
        --spacing-xs: 6px;
        --spacing-sm: 12px;
        --spacing-md: 16px;
        --spacing-lg: 24px;
        --spacing-xl: 32px;
    }
    
    /* Landing Page */
    .landing-page {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    /* Story Grid - 2 columns, centered */
    .stories-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
        max-width: 400px;
    }
    
    .story-card {
        width: 140px;
        height: 210px;
        border-radius: 12px;
    }
    
    .story-card-title {
        font-size: 0.875rem;
        line-height: 1.3;
        padding: 0 4px;
    }
    
    /* Story Overlay - Ensure full viewport coverage */
    .story-overlay {
        padding: 0;
        width: 100vw;
        height: 100vh;
        align-items: flex-start;
    }
    
    /* Progress Bars - Fixed to viewport */
    .progress-container {
        position: fixed;
        top: 10px;
        left: 50%;
        transform: translateX(-50%);
        width: calc(100vw - 32px);
        max-width: calc(100vw - 32px);
        gap: 3px;
        z-index: 1002;
    }
    
    .progress-bar {
        height: 2px;
    }
    
    /* Skip Button - Fixed to viewport */
    .skip-button {
        position: fixed;
        top: 10px;
        left: 10px;
        width: 36px;
        height: 36px;
        z-index: 1002;
    }
    
    .skip-button svg {
        width: 16px;
        height: 16px;
    }
    
    /* Story Container - Positioned at top on mobile */
    .story-container {
        position: fixed;
        top: 40px;
        left: 50%;
        transform: translateX(-50%);
        width: 95%;
        max-width: 100%;
        border-radius: 12px;
        animation: scaleInMobile 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    }
    
    /* Story Content */
    .story-content {
        padding: var(--spacing-sm) var(--spacing-sm);
        max-height: 82vh;
    }
    
    .slide-header {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .slide-paragraph {
        font-size: 1.15rem;
        line-height: 1.5;
    }
    
    .slide-bullets {
        max-width: 90%;
    }
    
    .slide-bullets li {
        font-size: 0.95rem;
        margin-bottom: var(--spacing-xs);
    }
    
    .slide-counter {
        font-size: 2.5rem;
    }
    
    .slide-subtitle {
        font-size: 0.875rem;
    }
    
    /* Navigation zones - larger tap targets */
    .nav-left {
        width: 35%;
    }
    
    .nav-right {
        width: 65%;
    }
}

/* ====== SMALL MOBILE (< 375px) ====== */
@media (max-width: 374px) {
    .story-card-title {
        font-size: 0.75rem;
        line-height: 1.2;
        padding: 0 2px;
    }
    
    .slide-header {
        font-size: 1.5rem;
    }
    
    .slide-paragraph {
        font-size: 1rem;
    }
}

/* ====== TABLET ANIMATION KEYFRAMES ====== */
@keyframes scaleInTablet {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ====== TABLET STYLES (600px - 999px) ====== */
@media (min-width: 600px) and (max-width: 999px) {
    :root {
        --spacing-xs: 8px;
        --spacing-sm: 14px;
        --spacing-md: 20px;
        --spacing-lg: 28px;
        --spacing-xl: 40px;
    }
    
    /* Landing Page */
    .landing-page {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    /* Story Grid - 3 columns, centered */
    .stories-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-md);
        max-width: 800px;
    }
    
    .story-card {
        width: 150px;
        height: 225px;
        border-radius: 14px;
    }
    
    .story-card-title {
        font-size: 1.1rem;
        line-height: 1.3;
        padding: 0 var(--spacing-xs);
    }
    
    /* Story Overlay - Align to top on tablet */
    .story-overlay {
        align-items: flex-start;
        padding-top: 40px;
    }
    
    /* Story Container - Positioned at top on tablet */
    .story-container {
        position: relative;
        width: 80%;
        max-width: 500px;
        margin-top: 0;
        animation: scaleInTablet 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    }
    
    .story-content {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .slide-header {
        font-size: 2.00rem;
    }
    
    .slide-paragraph {
        font-size: 1.25rem;
    }
    
    .slide-counter {
        font-size: 3.5rem;
    }
}

/* ====== DESKTOP STYLES (>= 1000px) ====== */
@media (min-width: 1000px) {
    /* Story Grid - 4 columns */
    .stories-grid {
        grid-template-columns: repeat(4, 1fr);
        max-width: 1200px;
        gap: var(--spacing-md);
    }
    
    .story-card-title {
        font-size: 1.5rem;
        line-height: 1.3;
    }
    
    /* Story Overlay - Enable scrolling for entire story */
    .story-overlay {
        overflow-y: auto;
        overflow-x: hidden;
        padding-top: 100px;
        padding-bottom: 20px;
    }
    
    /* Story Container - Relative positioning for scrolling */
    .story-container {
        position: relative;
        margin: 0 auto;
        width: var(--story-width);
        height: var(--story-height);
        max-width: var(--story-width);
        max-height: none;
        animation: scaleIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    }
    
    /* Story Content - Disable internal scrolling on desktop */
    .story-content {
        overflow-y: visible;
        overflow-x: hidden;
        max-height: none;
    }
    
    .slide-header {
        font-size: 2.00rem;
    }
    
    .slide-paragraph {
        font-size: 1.4rem;
    }
    
    .slide-counter {
        font-size: 4rem;
    }
    
    /* Hover effects on desktop only */
    .nav-left:hover {
        background: linear-gradient(to right, 
                                   rgba(255, 255, 255, 0.05) 0%, 
                                   transparent 100%);
    }
    
    .nav-right:hover {
        background: linear-gradient(to left, 
                                   rgba(255, 255, 255, 0.05) 0%, 
                                   transparent 100%);
    }
}

/* ====== LARGE DESKTOP (>= 1440px) ====== */
@media (min-width: 1440px) {
    .stories-grid {
        max-width: 1400px;
    }
}

/* ====== ULTRA-WIDE (>= 1920px) ====== */
@media (min-width: 1920px) {
    .landing-page {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .stories-grid {
        max-width: 1600px;
    }
}

/* ====== LANDSCAPE MOBILE ====== */
@media (max-width: 900px) and (orientation: landscape) {
    .story-container {
        width: auto;
        height: 85vh;
        max-height: 85vh;
    }
    
    .story-content {
        padding: var(--spacing-sm) var(--spacing-sm);
    }
    
    .slide-header {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .slide-paragraph {
        font-size: 1.05rem;
    }
}

/* ====== PRINT STYLES ====== */
@media print {
    .story-overlay,
    .skip-button,
    .progress-container,
    .nav-zone {
        display: none;
    }
    
    .landing-page {
        background: white;
        color: black;
    }
    
    .story-card {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}

/* ====== HIGH CONTRAST MODE ====== */
@media (prefers-contrast: high) {
    .story-overlay {
        background: rgba(0, 0, 0, 0.9);
    }
    
    .slide-header,
    .slide-paragraph {
        text-shadow: 0 2px 4px rgba(0, 0, 0, 1);
    }
    
    .skip-button {
        border: 3px solid var(--white);
    }
}

/* ====== DARK MODE SUPPORT ====== */
@media (prefers-color-scheme: dark) {
    /* Already dark by default, but can add overrides here */
}

/* ====== TOUCH DEVICE OPTIMIZATIONS ====== */
@media (hover: none) and (pointer: coarse) {
    /* Touch targets at least 44x44px */
    .skip-button {
        min-width: 44px;
        min-height: 44px;
    }
    
    .story-card {
        /* Remove hover effects on touch devices */
        transition: transform var(--transition-fast);
    }
    
    .story-card:active {
        transform: scale(0.95);
    }
    
    /* Larger tap zones on mobile */
    .nav-left,
    .nav-right {
        /* Already optimized in mobile breakpoint */
    }
}