/*
 * Universal Media Downloader - Responsive Stylesheet
 * Mobile-first approach with breakpoints for tablet and desktop
 */

/* ============================================
   MOBILE FIRST (Base - 320px to 767px)
   ============================================ */

/* Header Mobile */
.header-content {
    padding: 0 var(--spacing-md);
}

.logo {
    font-size: var(--font-size-lg);
}

.logo-icon {
    width: 36px;
    height: 36px;
}

.nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background: var(--bg-secondary);
    flex-direction: column;
    padding: var(--spacing-xl);
    gap: var(--spacing-lg);
    z-index: 999;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.nav.show {
    display: flex;
}

.nav-link {
    font-size: var(--font-size-lg);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--card-border);
}

.mobile-menu-toggle {
    display: flex;
}

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

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero Mobile */
.hero {
    min-height: auto;
    padding: calc(var(--header-height) + var(--spacing-2xl)) var(--spacing-md) var(--spacing-2xl);
}

.hero-content {
    padding: var(--spacing-lg);
}

.hero-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xl);
}

/* Platform Badges Mobile */
.platform-badges {
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.platform-badge {
    width: 44px;
    height: 44px;
}

.platform-badge svg {
    width: 22px;
    height: 22px;
}

/* URL Input Mobile */
.url-input-container {
    padding: 0 var(--spacing-md);
}

.url-input-wrapper {
    flex-direction: column;
    padding: var(--spacing-sm);
    gap: var(--spacing-sm);
}

.url-input-icon {
    display: none;
}

.url-input {
    width: 100%;
    padding: var(--spacing-md);
    text-align: center;
    font-size: var(--font-size-base);
}

.url-input-actions {
    width: 100%;
    justify-content: center;
    padding: 0;
    gap: var(--spacing-md);
}

.detected-platform {
    margin: 0;
}

/* Options Panel Mobile */
.options-panel {
    margin: 0 var(--spacing-md) var(--spacing-xl);
    padding: var(--spacing-lg);
}

.video-preview {
    flex-direction: column;
    text-align: center;
}

.video-thumbnail {
    width: 100%;
    max-width: 280px;
    height: 160px;
    margin: 0 auto;
}

.video-info {
    text-align: center;
}

.video-meta {
    justify-content: center;
}

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

/* Download Button Mobile */
.btn-download {
    width: 100%;
    max-width: 300px;
}

/* Progress Container Mobile */
.progress-container {
    margin: var(--spacing-lg) auto;
}

/* Queue Section Mobile */
.queue-section {
    padding: var(--spacing-2xl) var(--spacing-md);
}

.section-header {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
}

.section-title {
    font-size: var(--font-size-xl);
}

.queue-item {
    flex-direction: column;
    text-align: center;
    padding: var(--spacing-lg);
}

.queue-thumbnail {
    width: 100%;
    max-width: 200px;
    height: 112px;
    margin: 0 auto;
}

.queue-info {
    width: 100%;
}

.queue-title {
    white-space: normal;
}

.queue-meta {
    justify-content: center;
    flex-wrap: wrap;
}

.queue-actions {
    justify-content: center;
    margin-top: var(--spacing-md);
}

/* Toast Mobile */
.toast-container {
    top: auto;
    bottom: var(--spacing-lg);
    left: var(--spacing-md);
    right: var(--spacing-md);
}

.toast {
    max-width: 100%;
}

/* Modal Mobile (Bottom Sheet) */
.modal-overlay {
    align-items: flex-end;
    padding: 0;
}

.modal {
    max-height: 85vh;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    animation: slideUp 0.3s ease;
}

/* Footer Mobile */
.footer {
    padding: var(--spacing-xl) var(--spacing-md);
}

.footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

/* ============================================
   TABLET (768px to 1199px)
   ============================================ */

@media (min-width: 768px) {

    /* Header Tablet */
    .header-content {
        padding: 0 var(--spacing-xl);
    }

    .logo {
        font-size: var(--font-size-xl);
    }

    .logo-icon {
        width: 40px;
        height: 40px;
    }

    .nav {
        display: flex;
        position: static;
        width: auto;
        height: auto;
        background: transparent;
        flex-direction: row;
        padding: 0;
        gap: var(--spacing-lg);
    }

    .nav-link {
        font-size: var(--font-size-base);
        padding: 0;
        border-bottom: none;
    }

    .mobile-menu-toggle {
        display: none;
    }

    /* Hero Tablet */
    .hero {
        min-height: 100vh;
        padding-top: var(--header-height);
    }

    .hero-content {
        padding: var(--spacing-2xl);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
        margin-bottom: var(--spacing-lg);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
        margin-bottom: var(--spacing-2xl);
    }

    /* Platform Badges Tablet */
    .platform-badges {
        gap: var(--spacing-md);
        margin-bottom: var(--spacing-2xl);
    }

    .platform-badge {
        width: 50px;
        height: 50px;
    }

    .platform-badge svg {
        width: 26px;
        height: 26px;
    }

    /* URL Input Tablet */
    .url-input-container {
        padding: 0;
        max-width: 600px;
    }

    .url-input-wrapper {
        flex-direction: row;
        padding: var(--spacing-sm);
        gap: 0;
    }

    .url-input-icon {
        display: flex;
    }

    .url-input {
        text-align: left;
        font-size: var(--font-size-lg);
    }

    .url-input-actions {
        width: auto;
        padding-right: var(--spacing-sm);
    }

    /* Options Panel Tablet */
    .options-panel {
        margin: 0 auto var(--spacing-2xl);
        max-width: 600px;
        padding: var(--spacing-xl);
    }

    .video-preview {
        flex-direction: row;
        text-align: left;
    }

    .video-thumbnail {
        width: 160px;
        height: 90px;
        margin: 0;
    }

    .video-info {
        text-align: left;
    }

    .video-meta {
        justify-content: flex-start;
    }

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

    /* Queue Section Tablet */
    .queue-section {
        padding: var(--spacing-3xl) var(--spacing-xl);
    }

    .section-header {
        flex-direction: row;
        text-align: left;
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .queue-item {
        flex-direction: row;
        text-align: left;
        padding: var(--spacing-md);
    }

    .queue-thumbnail {
        width: 120px;
        height: 68px;
        margin: 0;
    }

    .queue-info {
        width: auto;
    }

    .queue-title {
        white-space: nowrap;
    }

    .queue-meta {
        justify-content: flex-start;
    }

    .queue-actions {
        margin-top: 0;
    }

    /* Toast Tablet */
    .toast-container {
        top: calc(var(--header-height) + var(--spacing-lg));
        bottom: auto;
        left: auto;
        right: var(--spacing-lg);
    }

    .toast {
        max-width: 380px;
    }

    /* Modal Tablet */
    .modal-overlay {
        align-items: center;
        padding: var(--spacing-xl);
    }

    .modal {
        max-height: 90vh;
        border-radius: var(--radius-xl);
        animation: modalSlideUp 0.3s ease;
    }

    /* Footer Tablet */
    .footer {
        padding: var(--spacing-2xl);
    }

    .footer-links {
        gap: var(--spacing-xl);
    }
}

/* ============================================
   DESKTOP (1200px and above)
   ============================================ */

@media (min-width: 1200px) {

    /* Header Desktop */
    .header-content {
        padding: 0 var(--spacing-2xl);
    }

    .nav {
        gap: var(--spacing-xl);
    }

    /* Hero Desktop */
    .hero-content {
        max-width: 900px;
    }

    .hero-title {
        font-size: var(--font-size-5xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-xl);
    }

    /* Platform Badges Desktop */
    .platform-badge {
        width: 56px;
        height: 56px;
        transition: all var(--transition-normal);
    }

    .platform-badge:hover {
        transform: scale(1.15) translateY(-4px);
        box-shadow: 0 10px 30px var(--glass-shadow);
    }

    .platform-badge svg {
        width: 30px;
        height: 30px;
    }

    /* URL Input Desktop */
    .url-input-container {
        max-width: 700px;
    }

    /* Options Panel Desktop */
    .options-panel {
        max-width: 700px;
    }

    .video-thumbnail {
        width: 180px;
        height: 100px;
    }

    /* Queue Section Desktop */
    .queue-section {
        padding: var(--spacing-3xl) 0;
    }

    .queue-list {
        /* Single column layout */
        grid-template-columns: 1fr;
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }

    /* Toast Desktop */
    .toast {
        max-width: 400px;
    }
}

/* ============================================
   LARGE DESKTOP (1400px and above)
   ============================================ */

@media (min-width: 1400px) {
    :root {
        --max-width: 1400px;
    }

    .hero-content {
        max-width: 1000px;
    }

    .queue-list {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   TOUCH DEVICE OPTIMIZATIONS
   ============================================ */

@media (hover: none) and (pointer: coarse) {

    /* Increase touch targets */
    .btn {
        min-height: 48px;
    }

    .btn-paste,
    .btn-clear {
        width: 48px;
        height: 48px;
    }

    .theme-toggle {
        width: 64px;
        height: 36px;
    }

    .theme-toggle-thumb {
        width: 28px;
        height: 28px;
    }

    [data-theme="dark"] .theme-toggle-thumb {
        left: calc(100% - 32px);
    }

    /* Disable hover effects */
    .glass-card:hover {
        transform: none;
        box-shadow: var(--card-shadow);
    }

    .platform-badge:hover {
        transform: none;
    }

    .btn-primary:hover {
        transform: none;
    }
}

/* ============================================
   REDUCED MOTION PREFERENCE
   ============================================ */

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .animated-bg {
        animation: none;
    }

    html {
        scroll-behavior: auto;
    }
}

/* ============================================
   HIGH CONTRAST MODE
   ============================================ */

@media (prefers-contrast: high) {
    :root {
        --card-border: var(--text-primary);
        --input-border: var(--text-primary);
    }

    .btn-primary {
        background: var(--accent-primary);
        border: 2px solid var(--btn-primary-text);
    }

    .glass-card {
        border-width: 2px;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {

    .header,
    .footer,
    .btn,
    .theme-toggle,
    .mobile-menu-toggle,
    .toast-container,
    .modal-overlay {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

    .glass-card {
        background: white;
        border: 1px solid #ccc;
        box-shadow: none;
    }
}

/* ============================================
   LANDSCAPE ORIENTATION (Mobile)
   ============================================ */

@media (max-width: 767px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: calc(var(--header-height) + var(--spacing-lg)) var(--spacing-md) var(--spacing-lg);
    }

    .hero-title {
        font-size: var(--font-size-2xl);
    }

    .platform-badges {
        margin-bottom: var(--spacing-lg);
    }
}

/* ============================================
   SMALL PHONES (320px)
   ============================================ */

@media (max-width: 359px) {
    :root {
        --font-size-base: 0.875rem;
        --spacing-md: 0.75rem;
        --spacing-lg: 1rem;
    }

    .hero-title {
        font-size: var(--font-size-2xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-sm);
    }

    .platform-badge {
        width: 40px;
        height: 40px;
    }

    .platform-badge svg {
        width: 20px;
        height: 20px;
    }
}