:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
}

body {
    background-color: #f8f9fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    flex: 1;
}

/* Cards de publication */
.publication-card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    transition: box-shadow 0.3s;
}

.publication-card:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.publication-header {
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.publication-content {
    padding: 0 15px 15px 15px;
}

.publication-image {
    width: 100%;
    max-height: 500px;
    object-fit: cover;
    border-radius: 5px;
    margin-top: 10px;
}

.publication-actions {
    padding: 15px;
    border-top: 1px solid #e9ecef;
    display: flex;
    gap: 15px;
}

.action-btn {
    background: none;
    border: none;
    color: #6c757d;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 5px;
    transition: all 0.3s;
}

.action-btn:hover {
    background-color: #f8f9fa;
    color: var(--primary-color);
}

.action-btn.liked {
    color: var(--danger-color);
}

.action-btn i {
    margin-right: 5px;
}

/* Formulaire de nouvelle publication */
.new-publication-card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 20px;
    margin-bottom: 20px;
}

.new-publication-card textarea {
    border: none;
    resize: none;
    width: 100%;
    padding: 10px;
    min-height: 80px;
}

.new-publication-card textarea:focus {
    outline: none;
}

/* Profil utilisateur */
.profile-header {
    background: linear-gradient(135deg, var(--primary-color), #0a58ca);
    color: white;
    padding: 40px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.profile-avatar-large {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid white;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.profile-stats {
    display: flex;
    gap: 30px;
    margin-top: 20px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 24px;
    font-weight: bold;
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
}

/* Liste d'amis */
.friend-card {
    background: white;
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.friend-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.friend-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

/* Messages */
.messages-container {
    display: flex;
    gap: 20px;
    height: calc(100vh - 200px);
}

.conversations-list {
    flex: 0 0 300px;
    background: white;
    border-radius: 10px;
    padding: 15px;
    overflow-y: auto;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.conversation-item {
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 10px;
    transition: background-color 0.3s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.conversation-item:hover {
    background-color: #f8f9fa;
}

.conversation-item.active {
    background-color: var(--primary-color);
    color: white;
}

.conversation-item.unread {
    font-weight: bold;
    background-color: #e7f3ff;
}

.messages-chat {
    flex: 1;
    background: white;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.chat-header {
    padding: 15px;
    border-bottom: 1px solid #e9ecef;
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message-bubble {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: 18px;
    word-wrap: break-word;
}

.message-sent {
    align-self: flex-end;
    background-color: var(--primary-color);
    color: white;
}

.message-received {
    align-self: flex-start;
    background-color: #e9ecef;
    color: #212529;
}

.message-time {
    font-size: 11px;
    opacity: 0.7;
    margin-top: 5px;
}

.chat-input {
    padding: 15px;
    border-top: 1px solid #e9ecef;
    display: flex;
    gap: 10px;
}

.chat-input input {
    flex: 1;
    border: 1px solid #dee2e6;
    border-radius: 25px;
    padding: 10px 20px;
}

/* Recherche */
.search-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.search-result {
    background: white;
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.search-result:hover {
    transform: translateX(5px);
}

/* Notifications */
.notification-item {
    background: white;
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 15px;
}

.notification-item.unread {
    background-color: #e7f3ff;
    border-left: 4px solid var(--primary-color);
}

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

/* Badges */
.badge {
    display: inline-block;
    min-width: 20px;
    padding: 3px 7px;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
    color: #fff;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 10px;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

/* Responsive */
@media (max-width: 768px) {
    .messages-container {
        flex-direction: column;
        height: auto;
    }
    
    .conversations-list {
        flex: 1;
        max-height: 300px;
    }
    
    .message-bubble {
        max-width: 85%;
    }
    
    .profile-stats {
        flex-direction: column;
        gap: 15px;
    }
}

/* Loader */
.loader {
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

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

/* Page de connexion/inscription */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), #0a58ca);
}

.auth-card {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    max-width: 450px;
    width: 100%;
}

.auth-card h2 {
    color: var(--primary-color);
    margin-bottom: 30px;
    text-align: center;
}

.auth-card .form-control {
    border-radius: 8px;
    padding: 12px;
}

.auth-card .btn {
    border-radius: 8px;
    padding: 12px;
    font-weight: 600;
}