* {
    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%);
    color: #333;
    overflow: hidden;
}

.screen {
    display: none;
    width: 100vw;
    height: 100vh;
}

.screen.active {
    display: flex;
}

/* ==================== LOGIN SCREEN ==================== */
#login-screen {
    justify-content: center;
    align-items: center;
}

.login-container {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
    min-width: 400px;
}

.login-container h1 {
    color: #667eea;
    margin-bottom: 0.5rem;
    font-size: 2.5rem;
}

.login-container p {
    color: #666;
    margin-bottom: 2rem;
}

.login-container input {
    width: 100%;
    padding: 1rem;
    margin-bottom: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border 0.3s;
}

.login-container input:focus {
    outline: none;
    border-color: #667eea;
}

.primary-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s;
}

.primary-btn:hover {
    transform: translateY(-2px);
}

.info {
    margin-top: 1rem;
    color: #999;
}

/* ==================== CHAT SCREEN ==================== */
#chat-screen {
    flex-direction: column;
}

.main-container {
    display: flex;
    width: 100%;
    height: 100vh;
    position: relative;
}

.video-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background: #1a1a2e;
}

/* Ekran Paylaşımı */
.screen-share {
    flex: 1;
    position: relative;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
}

#screen-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.no-screen {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder {
    text-align: center;
    color: #666;
    font-size: 4rem;
}

.placeholder p {
    font-size: 1.2rem;
    margin-top: 1rem;
}

/* Kamera Grid */
.camera-grid {
    position: absolute;
    bottom: 80px;
    left: 20px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    max-width: calc(100% - 40px);
    z-index: 10;
}

.video-box {
    position: relative;
    width: 200px;
    height: 150px;
    background: #000;
    border-radius: 10px;
    overflow: hidden;
    border: 3px solid #667eea;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

.video-box.local {
    border-color: #4caf50;
}

.video-box video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-label {
    position: absolute;
    bottom: 5px;
    left: 5px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 0.8rem;
}

.video-controls {
    position: absolute;
    top: 5px;
    right: 5px;
    display: flex;
    gap: 5px;
}

.control-btn {
    background: rgba(0, 0, 0, 0.7);
    border: none;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s;
    color: white;
}

.control-btn:hover {
    background: rgba(0, 0, 0, 0.9);
    transform: scale(1.1);
}

.control-btn.active {
    background: rgba(76, 175, 80, 0.8);
}

.control-btn.danger {
    background: rgba(244, 67, 54, 0.8);
}

.control-btn.hidden {
    display: none;
}

/* Alt Kontroller */
.bottom-controls {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 10;
}

.bottom-controls .control-btn {
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: bold;
}

/* Oda Bilgisi */
.room-info {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 10px 20px;
    border-radius: 10px;
    display: flex;
    gap: 20px;
    font-size: 0.9rem;
    z-index: 10;
}

/* ==================== CHAT TOGGLE BUTTON ==================== */
.chat-toggle-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 50%;
    font-size: 1.8rem;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    z-index: 100;
    transition: all 0.3s;
}

.chat-toggle-btn:hover {
    transform: scale(1.1);
}

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

.unread-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #f44336;
    color: white;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: bold;
    border: 2px solid white;
}

.unread-badge.hidden {
    display: none;
}

/* ==================== CHAT SIDEBAR ==================== */
.chat-sidebar {
    position: fixed;
    right: -100%;
    top: 0;
    width: 400px;
    height: 100vh;
    background: white;
    display: flex;
    flex-direction: column;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    transition: right 0.3s ease-in-out;
}

.chat-sidebar.open {
    right: 0;
}

.chat-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header h3 {
    font-size: 1.3rem;
}

.close-chat-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 1.5rem;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.3s;
}

.close-chat-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    background: #f5f5f5;
}

.chat-message {
    background: white;
    padding: 0.8rem;
    margin-bottom: 0.8rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    animation: slideIn 0.3s ease;
}

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

.chat-message.own {
    background: #e3f2fd;
}

.message-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.3rem;
}

.message-user {
    font-weight: bold;
    color: #667eea;
    font-size: 0.9rem;
}

.message-time {
    color: #999;
    font-size: 0.75rem;
}

.message-text {
    color: #333;
    word-wrap: break-word;
}

.system-message {
    text-align: center;
    color: #999;
    font-size: 0.85rem;
    font-style: italic;
    padding: 0.5rem;
}

.chat-input-container {
    display: flex;
    padding: 1rem;
    background: white;
    border-top: 1px solid #e0e0e0;
}

#chat-input {
    flex: 1;
    padding: 0.8rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
}

#chat-input:focus {
    outline: none;
    border-color: #667eea;
}

#send-message-btn {
    margin-left: 0.5rem;
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s;
}

#send-message-btn:hover {
    transform: translateY(-2px);
}

/* Scrollbar Styling */
.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 10px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: #764ba2;
}

/* ==================== MOBILE RESPONSIVE ==================== */
@media (max-width: 768px) {
    .login-container {
        min-width: 300px;
        padding: 2rem;
        margin: 1rem;
    }

    .chat-sidebar {
        width: 100%;
        right: -100%;
    }

    .chat-sidebar.open {
        right: 0;
    }

    .camera-grid {
        bottom: 60px;
        left: 10px;
        max-width: calc(100% - 20px);
    }

    .video-box {
        width: 150px;
        height: 112px;
    }

    .bottom-controls {
        flex-direction: column;
        bottom: 10px;
        gap: 8px;
    }

    .bottom-controls .control-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .room-info {
        top: 10px;
        left: 10px;
        font-size: 0.8rem;
        padding: 8px 15px;
        flex-direction: column;
        gap: 5px;
    }

    .chat-toggle-btn {
        width: 55px;
        height: 55px;
        font-size: 1.5rem;
        top: 10px;
        right: 10px;
    }

    .placeholder {
        font-size: 3rem;
    }

    .placeholder p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .video-box {
        width: 120px;
        height: 90px;
    }

    .login-container {
        min-width: 280px;
        padding: 1.5rem;
    }

    .login-container h1 {
        font-size: 2rem;
    }
}

/* Desktop - Chat açıkken */
@media (min-width: 769px) {
    .chat-sidebar {
        position: relative;
        right: auto;
        width: 0;
        transition: width 0.3s ease-in-out;
    }

    .chat-sidebar.open {
        width: 400px;
    }
}
 
/* ==================== NEW FEATURES - AVATAR, EMOJI, AUDIO LEVEL, HAND RAISE, CONNECTION ==================== */  
  
/* Avatar Selector */  
.avatar-selector { margin: 1.5rem 0; }  
.avatar-selector p { margin-bottom: 0.8rem; color: #666; font-size: 0.9rem; }  
.avatar-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }  
.avatar-option { font-size: 2rem; padding: 10px; border: 3px solid #e0e0e0; border-radius: 10px; cursor: pointer; transition: all 0.3s; text-align: center; }  
.avatar-option:hover { border-color: #667eea; transform: scale(1.1); }  
.avatar-option.selected { border-color: #667eea; background: #e3f2fd; } 

/* ==================== NEW FEATURES CSS ==================== */

/* Avatar Selector */
.avatar-selector {
    margin: 1.5rem 0;
}

.avatar-selector p {
    margin-bottom: 0.8rem;
    color: #666;
    font-size: 0.9rem;
}

.avatar-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 1rem;
}

.avatar-option {
    font-size: 2rem;
    padding: 10px;
    border: 3px solid #e0e0e0;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

.avatar-option:hover {
    border-color: #667eea;
    transform: scale(1.1);
}

.avatar-option.selected {
    border-color: #667eea;
    background: #e3f2fd;
}

/* Audio Level Indicator */
.audio-level-indicator {
    position: absolute;
    bottom: 35px;
    left: 5px;
    right: 5px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
}

.audio-level-bar {
    height: 100%;
    background: linear-gradient(90deg, #4caf50, #8bc34a);
    width: 0%;
    transition: width 0.1s;
    border-radius: 2px;
}

/* Hand Raised Icon */
.hand-raised-icon {
    position: absolute;
    top: 60px;
    right: 5px;
    font-size: 1.5rem;
    background: rgba(255, 152, 0, 0.9);
    padding: 5px 10px;
    border-radius: 8px;
    animation: handPulse 1s infinite;
}

.hand-raised-icon.hidden {
    display: none;
}

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

/* Reactions Container */
.reactions-container {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: none;
    z-index: 100;
}

.reaction-emoji {
    position: absolute;
    font-size: 3rem;
    animation: floatUp 9s ease-out forwards;
}

@keyframes floatUp {
    0% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    100% {
        opacity: 0;
        transform: translateY(-800px) scale(1.5);
    }
}

/* Reaction Picker */
.reaction-picker {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    padding: 10px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    display: flex;
    gap: 10px;
    z-index: 200;
}

.reaction-picker.hidden {
    display: none;
}

.reaction-item {
    font-size: 2rem;
    cursor: pointer;
    transition: transform 0.2s;
    padding: 5px;
}

.reaction-item:hover {
    transform: scale(1.3);
}

/* Connection Quality */
.connection-quality {
    display: flex;
    align-items: center;
    gap: 5px;
}

.connection-quality.good {
    color: #4caf50;
}

.connection-quality.fair {
    color: #ff9800;
}

.connection-quality.poor {
    color: #f44336;
}

/* Emoji Button & Picker */
.emoji-btn {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: transform 0.2s;
}

.emoji-btn:hover {
    transform: scale(1.2);
}

.emoji-picker {
    position: absolute;
    bottom: 70px;
    left: 10px;
    background: white;
    border-radius: 15px;
    padding: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    max-width: 380px;
    max-height: 500px;
    overflow-y: auto;
    z-index: 100;
}

.emoji-picker.hidden {
    display: none;
}

.emoji-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 4px;
}

.emoji-item {
    font-size: 1.4rem;
    cursor: pointer;
    padding: 5px;
    border-radius: 5px;
    transition: background 0.2s;
    text-align: center;
}

.emoji-item:hover {
    background: #e3f2fd;
    transform: scale(1.2);
}

/* Message Avatar */
.message-avatar {
    font-size: 1.2rem;
    margin-right: 5px;
}

/* Emoji Scrollbar */
.emoji-picker::-webkit-scrollbar {
    width: 6px;
}

.emoji-picker::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.emoji-picker::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 10px;
}

/* Mobile Adjustments for New Features */
@media (max-width: 768px) {
    .avatar-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .reaction-emoji {
        font-size: 2rem;
    }

    .reaction-picker {
        bottom: 70px;
    }

    .emoji-picker {
        max-width: 250px;
        left: 50%;
        transform: translateX(-50%);
    }

    .emoji-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

/* Chat Tools */
.chat-tools {
    display: flex;
    gap: 10px;
    padding: 10px 15px;
    background: rgba(255, 255, 255, 0.1);
    justify-content: center;
}

.tool-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 1.2rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s;
}

.tool-btn:hover {
    background: rgba(255, 255, 255, 0.4);
    transform: scale(1.1);
}

/* Background Effect Menu */
.bg-effect-menu {
    position: absolute;
    top: 70px;
    right: 20px;
    background: white;
    border-radius: 15px;
    padding: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    z-index: 150;
}

.bg-effect-menu.hidden {
    display: none;
}

.bg-option {
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 8px;
    margin-bottom: 5px;
    transition: background 0.2s;
    font-size: 1rem;
}

.bg-option:hover {
    background: #e3f2fd;
}

.bg-option:last-child {
    margin-bottom: 0;
}

/* Recording Indicator */
.recording-indicator {
    position: absolute;
    top: 15px;
    right: 100px;
    background: rgba(244, 67, 54, 0.9);
    color: white;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: bold;
    display: none;
    animation: recordPulse 1.5s infinite;
}

.recording-indicator.active {
    display: block;
}

@keyframes recordPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* File Transfer Progress */
.file-transfer {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    padding: 15px 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    min-width: 300px;
    z-index: 200;
}

.file-transfer.hidden {
    display: none;
}

.file-name {
    font-weight: bold;
    margin-bottom: 10px;
    color: #667eea;
}

.file-progress-bar {
    width: 100%;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
}

.file-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s;
}

.file-status {
    margin-top: 8px;
    font-size: 0.85rem;
    color: #666;
}

/* Video Effects */
.video-effects-active #local-video {
    filter: blur(0px);
    transition: filter 0.3s;
}

.video-effects-blur #local-video {
    filter: blur(10px);
}

.video-effects-dark #local-video {
    filter: brightness(0.6);
}

.video-effects-light #local-video {
    filter: brightness(1.4);
}

.video-effects-grayscale #local-video {
    filter: grayscale(100%);
}