/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4a90d9;
    --primary-hover: #357abd;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --bg-color: #f5f7fa;
    --card-bg: #ffffff;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-muted: #999999;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--card-bg);
    box-shadow: var(--shadow);
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--card-bg);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    gap: 8px;
}

.btn-small {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-outline:hover {
    background-color: var(--bg-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--text-muted);
    transition: background-color 0.3s;
}

.status-dot.connected {
    background-color: var(--success-color);
}

.status-dot.listening {
    background-color: var(--success-color);
    animation: pulse 1.5s infinite;
}

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

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

/* Conversation Area */
.conversation-area {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.welcome-message {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.welcome-message p {
    margin-bottom: 8px;
}

.welcome-message .hint {
    font-size: 14px;
    color: var(--text-muted);
}

/* Conversation Cards */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.card.interim {
    opacity: 0.7;
    border-style: dashed;
}

.card-original {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.card-translation {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.card-explanation {
    font-size: 14px;
    color: var(--primary-color);
    background-color: #f0f7ff;
    padding: 8px 12px;
    border-radius: 6px;
    margin-bottom: 12px;
}

.card-suggestions {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.card-suggestions-title {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.suggestion-item {
    display: block;
    width: 100%;
    text-align: left;
    padding: 10px 14px;
    margin-bottom: 8px;
    background-color: #f8f9fa;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 15px;
}

.suggestion-item:hover {
    background-color: #e9ecef;
    border-color: var(--primary-color);
}

.suggestion-item:active {
    background-color: #dee2e6;
}

.suggestion-text {
    font-weight: 500;
    color: var(--text-primary);
    display: block;
}

.suggestion-scenario {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
}

/* Help Respond Card */
.help-card {
    background-color: #fffbf0;
    border-color: var(--warning-color);
}

.help-card .card-context {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-style: italic;
}

/* Error Card */
.error-card {
    background-color: #fff5f5;
    border-color: var(--danger-color);
    color: var(--danger-color);
}

/* Audio Device Selector */
.device-selector {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-color);
}

.device-selector label {
    font-size: 14px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.device-selector select {
    flex: 1;
    padding: 8px 12px;
    font-size: 14px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: white;
    cursor: pointer;
}

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

.device-selector .blackhole-device {
    color: var(--primary-color);
    font-weight: 500;
}

/* Controls */
.controls {
    display: flex;
    justify-content: center;
    gap: 12px;
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    background-color: var(--card-bg);
    position: sticky;
    bottom: 0;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-icon {
    font-size: 18px;
}

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

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

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

.btn-secondary:hover:not(:disabled) {
    background-color: #5a6268;
}

.btn-help {
    background-color: var(--warning-color);
    color: #333;
}

.btn-help:hover:not(:disabled) {
    background-color: #e0a800;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: #333;
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    opacity: 0;
    transition: all 0.3s;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

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

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-muted);
    cursor: pointer;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group select {
    width: 100%;
    padding: 10px 12px;
    font-size: 14px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: white;
}

.summary-result {
    margin-top: 20px;
    padding: 16px;
    background-color: var(--bg-color);
    border-radius: 8px;
}

.summary-result h3 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

#summaryContent {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    white-space: pre-wrap;
}

.summary-actions {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

/* Responsive */
@media (max-width: 600px) {
    .header {
        padding: 12px 16px;
    }

    .header h1 {
        font-size: 20px;
    }

    .conversation-area {
        padding: 16px;
    }

    .controls {
        flex-wrap: wrap;
        padding: 12px 16px;
    }

    .btn {
        flex: 1;
        min-width: calc(50% - 6px);
        padding: 10px 16px;
        font-size: 14px;
    }

    .btn-help {
        min-width: 100%;
    }
}