/* Design Mobile-First comme Instagram/TikTok */

/* Variables CSS pour mobile */
:root {
    --mobile-header-height: 60px;
    --mobile-bottom-nav-height: 70px;
    --mobile-safe-area-top: env(safe-area-inset-top);
    --mobile-safe-area-bottom: env(safe-area-inset-bottom);
    --mobile-safe-area-left: env(safe-area-inset-left);
    --mobile-safe-area-right: env(safe-area-inset-right);
    
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --danger-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    
    --text-primary: #1a1a1a;
    --text-secondary: #8e8e8e;
    --text-muted: #c7c7cc;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    
    --border-color: #e1e5e9;
    --border-hover: #c7c7cc;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Mode sombre */
@media (prefers-color-scheme: dark) {
    :root {
        --glass-bg: rgba(0, 0, 0, 0.3);
        --glass-border: rgba(255, 255, 255, 0.1);
        
        --text-primary: #ffffff;
        --text-secondary: #a8a8a8;
        --text-muted: #6c6c70;
        
        --bg-primary: #000000;
        --bg-secondary: #1c1c1e;
        --bg-tertiary: #2c2c2e;
        
        --border-color: #38383a;
        --border-hover: #48484a;
    }
}

/* Reset et base mobile */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    padding-top: var(--mobile-safe-area-top);
    padding-bottom: var(--mobile-safe-area-bottom);
    padding-left: var(--mobile-safe-area-left);
    padding-right: var(--mobile-safe-area-right);
}

/* Container principal mobile */
.mobile-container {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Header mobile fixe */
.mobile-header {
    position: fixed;
    top: var(--mobile-safe-area-top);
    left: 0;
    right: 0;
    height: var(--mobile-header-height);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.mobile-header .logo {
    font-size: 24px;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.mobile-header .header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-action-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.header-action-btn:hover {
    background: var(--bg-secondary);
    transform: scale(1.05);
}

.header-action-btn .badge {
    position: absolute;
    top: -2px;
    right: -2px;
    width: 18px;
    height: 18px;
    background: var(--danger-gradient);
    color: white;
    border-radius: 50%;
    font-size: 10px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* Navigation bottom mobile */
.mobile-bottom-nav {
    position: fixed;
    bottom: var(--mobile-safe-area-bottom);
    left: 0;
    right: 0;
    height: var(--mobile-bottom-nav-height);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-around;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.nav-item-mobile {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    min-width: 60px;
    position: relative;
}

.nav-item-mobile.active {
    color: var(--text-primary);
}

.nav-item-mobile .icon {
    font-size: 24px;
    margin-bottom: 4px;
    transition: var(--transition-fast);
}

.nav-item-mobile.active .icon {
    transform: scale(1.1);
}

.nav-item-mobile .label {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-item-mobile .indicator {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: 50%;
    opacity: 0;
    transition: var(--transition-fast);
}

.nav-item-mobile.active .indicator {
    opacity: 1;
}

/* Contenu principal mobile */
.mobile-main-content {
    flex: 1;
    padding-top: var(--mobile-header-height);
    padding-bottom: var(--mobile-bottom-nav-height);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

/* Feed vertical mobile (style TikTok) */
.mobile-feed {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.mobile-post {
    width: 100%;
    min-height: 100vh;
    position: relative;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.mobile-post-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
}

.mobile-post-media {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.mobile-post-text {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 80px;
    color: white;
    font-size: 16px;
    font-weight: 500;
    line-height: 1.4;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    z-index: 10;
}

.mobile-post-actions {
    position: absolute;
    right: 16px;
    bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    z-index: 10;
}

.mobile-action-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.mobile-action-btn:hover {
    background: var(--bg-secondary);
    transform: scale(1.1);
}

.mobile-action-btn .icon {
    font-size: 24px;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.mobile-action-btn .count {
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 12px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.mobile-action-btn.liked {
    background: var(--danger-gradient);
    animation: heartBeat 0.6s ease-in-out;
}

@keyframes heartBeat {
    0%, 100% { transform: scale(1); }
    25% { transform: scale(1.2); }
    50% { transform: scale(1.1); }
    75% { transform: scale(1.15); }
}

/* Stories mobile */
.mobile-stories {
    padding: 16px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

.mobile-stories-container {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 8px;
}

.mobile-stories-container::-webkit-scrollbar {
    display: none;
}

.mobile-story-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 70px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.mobile-story-item:hover {
    transform: scale(1.05);
}

.mobile-story-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 3px solid var(--primary-gradient);
    padding: 2px;
    position: relative;
    background: var(--bg-primary);
}

.mobile-story-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.mobile-story-avatar::after {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    border-radius: 50%;
    background: var(--primary-gradient);
    z-index: -1;
    animation: rotate 3s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.mobile-story-name {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-primary);
    margin-top: 6px;
    text-align: center;
    max-width: 70px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mobile-story-add {
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    color: var(--text-secondary);
}

.mobile-story-add .icon {
    font-size: 24px;
}

/* Formulaire de post mobile */
.mobile-post-form {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 16px;
}

.mobile-post-form-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.mobile-post-form-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.mobile-post-form-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 25px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 16px;
    resize: none;
    min-height: 40px;
    max-height: 120px;
    transition: var(--transition-fast);
}

.mobile-post-form-input:focus {
    outline: none;
    border-color: var(--primary-gradient);
    background: var(--bg-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.mobile-post-form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
}

.mobile-post-form-media {
    display: flex;
    gap: 12px;
}

.mobile-media-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.mobile-media-btn:hover {
    background: var(--bg-tertiary);
    transform: scale(1.05);
}

.mobile-post-form-submit {
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 20px;
    padding: 8px 20px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.mobile-post-form-submit:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.mobile-post-form-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Modales mobile fullscreen */
.mobile-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    z-index: 10000;
    display: none;
    flex-direction: column;
    animation: slideInUp 0.3s ease-out;
}

.mobile-modal.show {
    display: flex;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-primary);
    position: sticky;
    top: 0;
    z-index: 10;
}

.mobile-modal-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.mobile-modal-close {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.mobile-modal-close:hover {
    background: var(--bg-tertiary);
    transform: scale(1.05);
}

.mobile-modal-content {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 16px;
}

/* Notifications mobile */
.mobile-notification {
    position: fixed;
    top: calc(var(--mobile-header-height) + var(--mobile-safe-area-top) + 16px);
    left: 16px;
    right: 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 16px;
    z-index: 10000;
    transform: translateY(-100px);
    opacity: 0;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

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

.mobile-notification-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.mobile-notification-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.mobile-notification-icon.success {
    background: var(--success-gradient);
    color: white;
}

.mobile-notification-icon.error {
    background: var(--danger-gradient);
    color: white;
}

.mobile-notification-icon.info {
    background: var(--primary-gradient);
    color: white;
}

.mobile-notification-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.mobile-notification-message {
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.4;
}

/* Swipe gestures */
.swipe-container {
    position: relative;
    overflow: hidden;
}

.swipe-item {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    transition: transform 0.3s ease-out;
}

.swipe-item.swipe-left {
    transform: translateX(-100%);
}

.swipe-item.swipe-right {
    transform: translateX(100%);
}

/* Animations de chargement */
.mobile-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.mobile-loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-gradient);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.mobile-loading-text {
    font-size: 14px;
    font-weight: 500;
}

/* Pull to refresh */
.pull-to-refresh {
    position: absolute;
    top: -60px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    transition: var(--transition);
}

.pull-to-refresh.active {
    top: 20px;
}

.pull-to-refresh .icon {
    font-size: 24px;
    animation: spin 1s linear infinite;
}

.pull-to-refresh .text {
    font-size: 12px;
    font-weight: 500;
}

/* Responsive breakpoints */
@media (min-width: 768px) {
    .mobile-container {
        max-width: 768px;
        margin: 0 auto;
        box-shadow: var(--shadow-lg);
    }
    
    .mobile-header {
        border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    }
    
    .mobile-bottom-nav {
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }
}

@media (min-width: 1024px) {
    .mobile-container {
        max-width: 1024px;
    }
    
    .mobile-feed {
        display: grid;
        grid-template-columns: 1fr 300px;
        gap: 24px;
        padding: 24px;
    }
    
    .mobile-post {
        min-height: auto;
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-md);
        margin-bottom: 24px;
    }
    
    .mobile-stories {
        border-radius: var(--radius-lg);
        margin: 24px;
        box-shadow: var(--shadow-md);
    }
}

/* Optimisations de performance */
.mobile-post,
.mobile-story-item,
.mobile-action-btn {
    will-change: transform;
}

.mobile-post-media {
    will-change: transform, opacity;
}

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

/* Focus visible pour l'accessibilité */
.mobile-action-btn:focus-visible,
.nav-item-mobile:focus-visible,
.header-action-btn:focus-visible {
    outline: 2px solid var(--primary-gradient);
    outline-offset: 2px;
}

/* Support des appareils avec encoche */
@supports (padding: max(0px)) {
    .mobile-header {
        padding-left: max(16px, var(--mobile-safe-area-left));
        padding-right: max(16px, var(--mobile-safe-area-right));
    }
    
    .mobile-bottom-nav {
        padding-left: max(16px, var(--mobile-safe-area-left));
        padding-right: max(16px, var(--mobile-safe-area-right));
    }
}