/* Variables CSS pour les thèmes */
:root {
    /* Thème clair (par défaut) */
    --primary-color: #ff0000;
    --secondary-color: #007bff;
    --accent-color: #28a745;
    --background-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-color: #212529;
    --border-color: #dee2e6;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --ios-card-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --navbar-height: 60px;
    --tabbar-height: 60px;
    --ios-blur: blur(20px);
    --ios-border: 1px solid rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] {
    --primary-color: #ff6b6b;
    --secondary-color: #4dabf7;
    --accent-color: #51cf66;
    --background-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #f1f3f5;
    --border-color: #343a40;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --ios-card-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    --ios-border: 1px solid rgba(255, 255, 255, 0.05);
}

[data-theme="red"] {
    --primary-color: #ff0000;
    --secondary-color: #dc3545;
    --accent-color: #fd7e14;
    --background-color: #f8d7da;
    --card-bg: #ffffff;
    --text-color: #721c24;
    --border-color: #f5c6cb;
}

[data-theme="blue"] {
    --primary-color: #007bff;
    --secondary-color: #0056b3;
    --accent-color: #17a2b8;
    --background-color: #cce5ff;
    --card-bg: #ffffff;
    --text-color: #004085;
    --border-color: #b8daff;
}

[data-theme="green"] {
    --primary-color: #28a745;
    --secondary-color: #20c997;
    --accent-color: #ffc107;
    --background-color: #d4edda;
    --card-bg: #ffffff;
    --text-color: #155724;
    --border-color: #c3e6cb;
}

/* Styles de base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
    padding-top: var(--navbar-height);
    padding-bottom: var(--tabbar-height);
    overscroll-behavior: none;
}

/* Navigation style iOS/TikTok */
.navbar {
    background-color: rgba(var(--primary-color-rgb, 255, 0, 0), 0.9);
    backdrop-filter: var(--ios-blur);
    -webkit-backdrop-filter: var(--ios-blur);
    color: white;
    height: var(--navbar-height);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    padding: 0 1rem;
    border-bottom: var(--ios-border);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-weight: bold;
    font-size: 1.5rem;
}

.nav-logo img {
    height: 32px;
    width: 32px;
    border-radius: 8px;
    margin-right: 10px;
    object-fit: cover;
}

.nav-menu {
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
    padding: 0.5rem 0.8rem;
    border-radius: 12px;
}

.nav-link:hover, .nav-link.active {
    background-color: rgba(255, 255, 255, 0.15);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 2px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* Barre de navigation inférieure style TikTok */
.tab-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--tabbar-height);
    background-color: rgba(var(--card-bg-rgb, 255, 255, 255), 0.9);
    backdrop-filter: var(--ios-blur);
    -webkit-backdrop-filter: var(--ios-blur);
    display: flex;
    justify-content: space-around;
    align-items: center;
    border-top: var(--ios-border);
    z-index: 1000;
}

.tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    text-decoration: none;
    color: var(--text-color);
    opacity: 0.7;
    transition: opacity 0.3s;
    flex: 1;
    height: 100%;
}

.tab-item.active {
    opacity: 1;
}

.tab-icon {
    font-size: 1.5rem;
    margin-bottom: 0.2rem;
}

.tab-label {
    font-size: 0.7rem;
    font-weight: 500;
}

.tab-item.active .tab-icon {
    color: var(--primary-color);
}

/* Pages */
.page {
    display: none;
    max-width: 1200px;
    margin: 1rem auto;
    padding: 0 1rem;
    animation: fadeIn 0.3s ease;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Section d'accueil */
.hero-section {
    text-align: center;
    padding: 2.5rem 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 16px;
    margin-bottom: 2rem;
    box-shadow: var(--ios-card-shadow);
}

.hero-section h1 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.cta-button {
    background-color: white;
    color: var(--primary-color);
    border: none;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.cta-button:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Grille de vidéos style TikTok */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.2rem;
    margin-top: 1.5rem;
}

.video-card {
    background-color: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--ios-card-shadow);
    transition: transform 0.3s;
    position: relative;
}

.video-card:hover {
    transform: translateY(-5px);
}

.video-thumbnail {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.video-info {
    padding: 1rem;
}

.video-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-description {
    color: var(--text-color);
    opacity: 0.7;
    font-size: 0.9rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-actions {
    display: flex;
    justify-content: space-between;
    margin-top: 1rem;
}

.action-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.5rem;
    border-radius: 8px;
    transition: background-color 0.2s;
}

.action-btn:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.action-btn:active {
    transform: scale(0.95);
}

/* Authentification style iOS */
.auth-container {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--ios-card-shadow);
}

.auth-container h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

.input-group {
    margin-bottom: 1.2rem;
}

.input-group input, .input-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background-color: var(--card-bg);
    color: var(--text-color);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.input-group input:focus, .input-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.auth-button {
    width: 100%;
    padding: 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.auth-button:hover {
    background-color: var(--secondary-color);
}

.auth-button:active {
    transform: scale(0.98);
}

.auth-switch {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.9rem;
}

.service-text {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
}

.service-text a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Messages style iOS */
.messages-container {
    display: flex;
    height: calc(100vh - var(--navbar-height) - var(--tabbar-height) - 2rem);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--ios-card-shadow);
}

.contacts-sidebar {
    width: 300px;
    border-right: var(--ios-border);
    background-color: var(--card-bg);
    display: flex;
    flex-direction: column;
}

.contacts-header {
    padding: 1.2rem;
    border-bottom: var(--ios-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(var(--card-bg-rgb, 255, 255, 255), 0.8);
    backdrop-filter: var(--ios-blur);
    -webkit-backdrop-filter: var(--ios-blur);
}

.contacts-list {
    flex: 1;
    overflow-y: auto;
}

.contact-item {
    padding: 1rem;
    border-bottom: var(--ios-border);
    cursor: pointer;
    transition: background-color 0.3s;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.contact-item:hover, .contact-item.active {
    background-color: rgba(var(--primary-color-rgb, 255, 0, 0), 0.05);
}

.contact-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--card-bg);
}

.chat-header {
    padding: 1.2rem;
    border-bottom: var(--ios-border);
    background-color: rgba(var(--card-bg-rgb, 255, 255, 255), 0.8);
    backdrop-filter: var(--ios-blur);
    -webkit-backdrop-filter: var(--ios-blur);
}

.messages-list {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    background-color: rgba(var(--background-color-rgb, 248, 249, 250), 0.5);
}

.message {
    max-width: 70%;
    padding: 0.8rem 1rem;
    border-radius: 18px;
    animation: messageIn 0.3s ease;
}

@keyframes messageIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.message.sent {
    align-self: flex-end;
    background-color: var(--primary-color);
    color: white;
    border-bottom-right-radius: 4px;
}

.message.received {
    align-self: flex-start;
    background-color: var(--card-bg);
    color: var(--text-color);
    border-bottom-left-radius: 4px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.message-input-container {
    display: flex;
    padding: 1rem;
    border-top: var(--ios-border);
    gap: 0.5rem;
    background-color: rgba(var(--card-bg-rgb, 255, 255, 255), 0.8);
    backdrop-filter: var(--ios-blur);
    -webkit-backdrop-filter: var(--ios-blur);
}

.message-input-container input {
    flex: 1;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background-color: var(--card-bg);
    color: var(--text-color);
    font-size: 1rem;
}

.message-input-container button {
    padding: 0.8rem 1.2rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.3s;
}

.message-input-container button:hover {
    background-color: var(--secondary-color);
}

/* Profil style iOS */
.profile-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.profile-header {
    grid-column: 1 / -1;
    display: flex;
    gap: 2rem;
    align-items: center;
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--ios-card-shadow);
}

.profile-avatar {
    text-align: center;
    position: relative;
}

.profile-avatar img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.change-avatar-btn {
    margin-top: 0.8rem;
    padding: 0.5rem 1rem;
    background-color: var(--background-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s;
}

.change-avatar-btn:hover {
    background-color: rgba(var(--primary-color-rgb, 255, 0, 0), 0.1);
}

.profile-info h2 {
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.profile-stats {
    display: flex;
    gap: 2rem;
    margin-top: 1.2rem;
}

.stat {
    text-align: center;
}

.stat span:first-child {
    display: block;
    font-weight: bold;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.profile-qr, .profile-edit {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: var(--ios-card-shadow);
}

#profileQRCode {
    margin: 1rem 0;
    text-align: center;
}

.share-btn {
    width: 100%;
    padding: 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.3s;
}

.share-btn:hover {
    background-color: var(--secondary-color);
}

/* Paramètres style iOS */
.settings-container {
    max-width: 600px;
    margin: 0 auto;
}

.settings-section {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: var(--ios-card-shadow);
    margin-bottom: 1.5rem;
}

.settings-section h3 {
    margin-bottom: 1.2rem;
    color: var(--primary-color);
    font-weight: 600;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.setting-item:last-child {
    border-bottom: none;
}

.switch {
    position: relative;
    display: inline-block;
    width: 51px;
    height: 31px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 27px;
    width: 27px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

.install-btn, .danger-btn {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.2s;
}

.install-btn {
    background-color: var(--primary-color);
    color: white;
}

.danger-btn {
    background-color: #dc3545;
    color: white;
}

.install-btn:active, .danger-btn:active {
    transform: scale(0.98);
}

/* Modal style iOS */
.modal {
    display: none;
    position: fixed;
    z-index: 1001;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

.close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.3s;
}

.close:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

/* Prompt d'installation style iOS */
.install-prompt {
    position: fixed;
    bottom: calc(var(--tabbar-height) + 1rem);
    right: 1rem;
    background-color: var(--card-bg);
    padding: 1.2rem;
    border-radius: 16px;
    box-shadow: var(--ios-card-shadow);
    display: none;
    z-index: 1002;
    max-width: 300px;
    backdrop-filter: var(--ios-blur);
    -webkit-backdrop-filter: var(--ios-blur);
    border: var(--ios-border);
    animation: slideInUp 0.3s ease;
}

@keyframes slideInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.install-prompt p {
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
}

.install-prompt button {
    margin-right: 0.5rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
}

#installAppBtn {
    background-color: var(--primary-color);
    color: white;
}

#dismissInstallBtn {
    background-color: var(--background-color);
    color: var(--text-color);
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem 1rem;
    margin-top: 2rem;
    background-color: var(--card-bg);
    border-top: var(--ios-border);
    border-radius: 16px 16px 0 0;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: var(--navbar-height);
        flex-direction: column;
        background-color: rgba(var(--primary-color-rgb, 255, 0, 0), 0.95);
        backdrop-filter: var(--ios-blur);
        -webkit-backdrop-filter: var(--ios-blur);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 1rem 0;
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

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

    .nav-toggle.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .messages-container {
        flex-direction: column;
        height: calc(100vh - var(--navbar-height) - var(--tabbar-height) - 2rem);
    }

    .contacts-sidebar {
        width: 100%;
        height: 30%;
    }

    .profile-container {
        grid-template-columns: 1fr;
    }

    .profile-header {
        flex-direction: column;
        text-align: center;
    }

    .profile-stats {
        justify-content: center;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .tab-label {
        display: none;
    }
    
    .tab-icon {
        font-size: 1.8rem;
        margin-bottom: 0;
    }
}

/* Animation pour les likes */
@keyframes likeAnimation {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

.like-btn.liked {
    animation: likeAnimation 0.5s ease;
    color: var(--primary-color);
}

/* Scrollbar personnalisée */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}

/* Amélioration des transitions iOS */
button, .action-btn, .nav-link, .tab-item {
    transition: all 0.2s ease;
}

/* Effet de press iOS */
.press-effect:active {
    transform: scale(0.97);
    opacity: 0.8;
}

/* Style pour les notifications */
.notification {
    position: fixed;
    top: calc(var(--navbar-height) + 1rem);
    right: 1rem;
    background-color: var(--card-bg);
    color: var(--text-color);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    box-shadow: var(--ios-card-shadow);
    z-index: 1003;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    animation: slideInRight 0.3s ease;
    max-width: 350px;
}

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

.notification.hide {
    animation: slideOutRight 0.3s ease forwards;
}

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

.notification-icon {
    font-size: 1.2rem;
    color: var(--primary-color);
}