* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

#app {
    min-height: 100vh;
}

.screen {
    display: none;
    min-height: 100vh;
}

.screen.active {
    display: block;
}

/* Giriş/Kayıt Ekranı */
.auth-container {
    max-width: 400px;
    margin: 50px auto;
    padding: 40px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    text-align: center;
}

.auth-container h1 {
    color: #667eea;
    margin-bottom: 10px;
    font-size: 2.5em;
}

.auth-container p {
    color: #666;
    margin-bottom: 30px;
}

.auth-tabs {
    display: flex;
    margin-bottom: 30px;
    border-radius: 10px;
    overflow: hidden;
    border: 2px solid #f0f0f0;
}

.tab-btn {
    flex: 1;
    padding: 15px;
    border: none;
    background: #f8f9fa;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

.tab-btn.active {
    background: #667eea;
    color: white;
}

.auth-form {
    text-align: left;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5a6fd8;
    transform: translateY(-2px);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

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

.btn-danger:hover {
    background: #c82333;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

/* Ana Uygulama Ekranı */
.header {
    background: white;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    color: #667eea;
}

.main-content {
    display: flex;
    height: calc(100vh - 80px);
}

/* Sol Panel */
.sidebar {
    width: 300px;
    background: white;
    border-right: 1px solid #e1e5e9;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid #e1e5e9;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h3 {
    color: #333;
    font-size: 1.2em;
}

.rooms-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.room-item {
    padding: 15px;
    margin-bottom: 10px;
    background: #f8f9fa;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.room-item:hover {
    background: #e9ecef;
    transform: translateY(-2px);
}

.room-item.active {
    border-color: #667eea;
    background: #e3f2fd;
}

.room-item h4 {
    color: #333;
    margin-bottom: 5px;
}

.room-item p {
    color: #666;
    font-size: 0.9em;
    margin-bottom: 5px;
}

.room-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8em;
    color: #888;
}

/* Sağ Panel */
.room-content {
    flex: 1;
    background: #f8f9fa;
    display: flex;
    flex-direction: column;
}

.no-room {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #666;
}

.no-room i {
    font-size: 4em;
    margin-bottom: 20px;
    color: #ccc;
}

.no-room h3 {
    margin-bottom: 10px;
    color: #333;
}

.room-active {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.room-header {
    background: white;
    padding: 20px 30px;
    border-bottom: 1px solid #e1e5e9;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.room-header h3 {
    color: #333;
    font-size: 1.5em;
}

.room-controls {
    display: flex;
    gap: 10px;
}

.room-users {
    flex: 1;
    padding: 20px 30px;
}

.room-users h4 {
    margin-bottom: 20px;
    color: #333;
    display: flex;
    align-items: center;
    gap: 10px;
}

.users-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.user-item {
    background: white;
    padding: 15px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.user-item i {
    color: #667eea;
    font-size: 1.2em;
}

.user-item.speaking {
    background: #e3f2fd;
    border: 2px solid #667eea;
}

.voice-indicators {
    padding: 20px 30px;
    background: white;
    border-top: 1px solid #e1e5e9;
}

.voice-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    font-weight: 600;
}

.voice-status.muted i {
    color: #dc3545;
}

.voice-status.unmuted i {
    color: #28a745;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: 15px;
    padding: 30px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h3 {
    color: #333;
}

.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #666;
}

.close-btn:hover {
    color: #333;
}

.form-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: 200px;
    }
    
    .room-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .users-list {
        grid-template-columns: 1fr;
    }
}

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

.screen.active {
    animation: fadeIn 0.3s ease;
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}