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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --bg-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: relative;
}

/* Header */
.header {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.call-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.call-status {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.call-duration {
    color: var(--success-color);
    font-weight: 600;
    font-family: 'Courier New', monospace;
}

/* Video Container */
.video-container {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 1rem;
    overflow: hidden;
    position: relative;
}

.video-wrapper {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg-card);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    justify-content: center;
}

.remote-video-wrapper {
    width: 100%;
    height: 100%;
    min-height: 0;
    position: relative;
    overflow: hidden;
}

.remote-video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    background: var(--bg-darker);
    display: block;
}

.remote-video-wrapper video[srcObject] {
    z-index: 3;
}

/* Hide overlay when video has stream - handled by JavaScript */
.remote-video-wrapper video.playing {
    z-index: 3;
}

.remote-video-wrapper video.playing ~ .video-overlay,
.remote-video-wrapper.has-video .video-overlay {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
}

.local-video-wrapper {
    position: absolute;
    bottom: 5rem;
    right: 1rem;
    width: 300px;
    height: 200px;
    z-index: 10;
    border: 3px solid var(--primary-color);
}

video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: var(--bg-darker);
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 1rem;
    background: linear-gradient(to bottom, rgba(0,0,0,0.3) 0%, transparent 30%, transparent 70%, rgba(0,0,0,0.3) 100%);
    pointer-events: none;
    z-index: 2;
    transition: opacity 0.3s ease;
}

.video-overlay.hidden {
    display: none !important;
    opacity: 0;
    visibility: hidden;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    pointer-events: auto;
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: var(--shadow);
}

.avatar.small {
    width: 36px;
    height: 36px;
    font-size: 1rem;
}

.avatar.large {
    width: 120px;
    height: 120px;
    font-size: 3rem;
}

.username {
    font-weight: 600;
    font-size: 1rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.video-status {
    display: flex;
    justify-content: flex-end;
}

.status-badge {
    background: rgba(0, 0, 0, 0.6);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    backdrop-filter: blur(10px);
}

.status-badge i {
    font-size: 0.6rem;
    color: var(--success-color);
}

.video-controls-mini {
    display: flex;
    gap: 0.5rem;
    pointer-events: auto;
}

.control-btn-mini {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.6);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    backdrop-filter: blur(10px);
}

.control-btn-mini:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: scale(1.1);
}

.control-btn-mini.active {
    background: var(--danger-color);
}

/* Controls Panel */
.controls-panel {
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    z-index: 100;
}

.controls-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    max-width: 1400px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.control-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: 12px;
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s;
    min-width: 80px;
    box-shadow: var(--shadow);
}

.control-btn:hover {
    background: var(--bg-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.control-btn.end-call {
    background: var(--danger-color);
    color: white;
}

.control-btn.end-call:hover {
    background: #dc2626;
    transform: scale(1.05);
}

.control-btn i {
    font-size: 1.5rem;
}

.control-label {
    font-size: 0.85rem;
    font-weight: 500;
}

/* Chat Sidebar */
.chat-sidebar {
    position: fixed;
    right: -400px;
    top: 0;
    width: 400px;
    height: 100vh;
    background: var(--bg-card);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: right 0.3s ease;
    z-index: 200;
    box-shadow: var(--shadow-lg);
}

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

.chat-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.close-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.close-btn:hover {
    background: var(--bg-dark);
    color: var(--text-primary);
}

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

.message {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.75rem;
    background: var(--bg-dark);
    border-radius: 8px;
    max-width: 80%;
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.message-text {
    color: var(--text-primary);
}

.chat-input-container {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 0.5rem;
}

.chat-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-dark);
    color: var(--text-primary);
    font-size: 0.9rem;
}

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

.send-btn {
    width: 44px;
    height: 44px;
    border-radius: 8px;
    border: none;
    background: var(--primary-color);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.send-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    z-index: 500;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    display: none;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                visibility 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transform: translateY(30px) scale(0.95);
    opacity: 0;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal.active .modal-content {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.modal:not(.active) .modal-content {
    transform: translateY(20px) scale(0.95);
    opacity: 0;
}

.modal-content.modal-small {
    max-width: 400px;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

.setting-group {
    margin-bottom: 1.5rem;
}

.setting-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.setting-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-dark);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
}

.setting-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Input Group Styles */
.input-group {
    margin-bottom: 1rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
}

.modal-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-dark);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s;
    box-sizing: border-box;
}

.modal-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input-hint {
    display: block;
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.input-error {
    display: block;
    margin-top: 0.5rem;
    color: #ef4444;
    font-size: 0.85rem;
    font-weight: 500;
}

.modal-input.error {
    border-color: #ef4444;
}

.modal-input.error:focus {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.modal-body p {
    margin: 0;
    color: var(--text-primary);
    line-height: 1.6;
}

/* Pre-call Screen */
.pre-call-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 400;
    pointer-events: auto;
}

.pre-call-screen.hidden {
    display: none;
}

.pre-call-content {
    text-align: center;
    max-width: 600px;
    padding: 2rem;
}

.pre-call-preview {
    position: relative;
    width: 400px;
    height: 300px;
    margin: 0 auto 2rem;
    border-radius: 16px;
    overflow: hidden;
    background: var(--bg-card);
    box-shadow: var(--shadow-lg);
}

.preview-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-darker);
    z-index: 1;
    transition: opacity 0.3s ease;
}

.preview-overlay.hidden {
    display: none;
}

#previewVideo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: relative;
    z-index: 0;
}

.pre-call-info h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pre-call-info p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.pre-call-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.call-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.room-input {
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 1rem;
    text-align: center;
}

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

.btn-primary,
.btn-secondary {
    padding: 1rem 2rem;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-dark);
    border-color: var(--primary-color);
}

.btn-secondary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Responsive Design */
@media (max-width: 768px) {
    .local-video-wrapper {
        width: 150px;
        height: 100px;
        bottom: 4rem;
        right: 0.5rem;
    }

    .controls-container {
        gap: 0.5rem;
    }

    .control-btn {
        padding: 0.75rem 1rem;
        min-width: 60px;
    }

    .control-btn i {
        font-size: 1.25rem;
    }

    .control-label {
        font-size: 0.75rem;
    }

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

    .pre-call-preview {
        width: 100%;
        max-width: 300px;
        height: 225px;
    }
}

/* Animations */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.connecting {
    animation: pulse 2s ease-in-out infinite;
}