:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent-color: #0ea5e9;
    --accent-hover: #0284c7;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --border-color: #334155;
    --success-color: #10b981;
}

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

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Header */
header {
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    background-color: rgba(15, 23, 42, 0.9);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background-color: var(--accent-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.2);
}

    .logo-icon svg {
        width: 24px;
        height: 24px;
        color: white;
    }

.app-title h1 {
    font-size: 1.25rem;
    font-weight: 700;
}

.app-title p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #64748b;
}

.status-badge.connected {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border-color: rgba(16, 185, 129, 0.2);
}

    .status-badge.connected .status-dot {
        background-color: var(--success-color);
        animation: pulse 2s infinite;
    }

.status-badge.connecting {
    background-color: rgba(234, 179, 8, 0.1);
    color: #eab308;
    border-color: rgba(234, 179, 8, 0.2);
}

    .status-badge.connecting .status-dot {
        background-color: #eab308;
        animation: pulse 1s infinite;
    }

.status-badge.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border-color: rgba(239, 68, 68, 0.2);
}

    .status-badge.error .status-dot {
        background-color: var(--danger-color);
    }

/* Main Layout */
main {
    flex: 1;
    padding: 1.5rem;
   /* display: grid;*/
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    height: calc(100vh - 80px);
}

@media (max-width: 768px) {
    main {
        grid-template-columns: 1fr;
        overflow-y: auto;
    }
}

/* Panels */
.panel {
    background-color: var(--card-bg);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.panel-title {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

    .panel-title svg {
        color: var(--accent-color);
        width: 20px;
        height: 20px;
    }

/* Left Panel - Knowledge */
.upload-btn {
    background-color: #334155;
    color: white;
    border: none;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.2s;
}

    .upload-btn:hover {
        background-color: #475569;
    }

    .upload-btn:disabled {
        opacity: 0.5;
        cursor: not-allowed;
    }

.knowledge-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

#knowledge-input {
    flex: 1;
    width: 100%;
    background-color: #0f172a;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1rem;
    color: #cbd5e1;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.875rem;
    resize: none;
    line-height: 1.5;
}

    #knowledge-input:focus {
        outline: none;
        border-color: var(--accent-color);
        box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.2);
    }

/* Right Panel - Interactive */
.interactive-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    background: radial-gradient(circle at center, rgba(15, 23, 42, 0) 0%, rgba(15, 23, 42, 0.5) 100%);
}

canvas {
    width: 100%;
    height: 200px;
    margin-bottom: 2rem;
}

.status-text {
    text-align: center;
    margin-bottom: 2rem;
    min-height: 1.5rem;
    font-size: 1rem;
}

.text-ready {
    color: var(--text-secondary);
}

.text-connecting {
    color: var(--accent-color);
    animation: pulse 1s infinite;
}

.text-listening {
    color: var(--success-color);
}

.text-error {
    color: var(--danger-color);
}

.control-btn {
    padding: 1rem 2rem;
    border-radius: 9999px;
    border: none;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}

.btn-start {
    background-color: var(--accent-color);
    color: white;
}

    .btn-start:hover {
        background-color: var(--accent-hover);
        transform: translateY(-2px);
    }

.btn-stop {
    background-color: var(--danger-color);
    color: white;
}

    .btn-stop:hover {
        background-color: var(--danger-hover);
        transform: translateY(-2px);
    }

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

    .modal.active {
        display: flex;
    }

.modal-content {
    background-color: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    width: 90%;
    max-width: 400px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
}

.modal-header {
    margin-bottom: 1.5rem;
    text-align: center;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.modal-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem;
    background-color: #0f172a;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-size: 1rem;
}

    .form-input:focus {
        outline: none;
        border-color: var(--accent-color);
        box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.2);
    }

.modal-footer {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.modal-btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

    .modal-btn-primary:hover {
        background-color: var(--accent-hover);
    }

.modal-btn-secondary {
    background-color: #334155;
    color: white;
}

    .modal-btn-secondary:hover {
        background-color: #475569;
    }

.error-message {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.5rem;
    display: none;
}

    .error-message.active {
        display: block;
    }

.timer-display {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 600;
    display: none;
}

    .timer-display.active {
        display: block;
    }

.speaking-indicator {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 600;
    display: none;
    align-items: center;
    gap: 0.5rem;
}

    .speaking-indicator.active {
        display: flex;
    }

    .speaking-indicator.ai-speaking {
        background-color: rgba(14, 165, 233, 0.5);
    }

    .speaking-indicator.user-speaking {
        background-color: rgba(16, 185, 129, 0.5);
    }

.speaking-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: white;
    animation: pulse 1s infinite;
}

footer {
    text-align: center;
    padding: 0.5rem;
    font-size: 0.75rem;
    color: #475569;
}

@keyframes pulse {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }

    100% {
        opacity: 1;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #1e293b;
}

::-webkit-scrollbar-thumb {
    background: #475569;
    border-radius: 4px;
}

    ::-webkit-scrollbar-thumb:hover {
        background: #64748b;
    }