/* Live Translation - Styles */

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

:root {
    --color-source: #2563eb;
    --color-source-bg: #eff6ff;
    --color-target: #16a34a;
    --color-target-bg: #f0fdf4;
    --color-error: #dc2626;
    --color-error-bg: #fef2f2;
    --color-error-border: #fca5a5;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-stop: #dc2626;
    --color-stop-hover: #b91c1c;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-status-connected: #16a34a;
    --color-status-connecting: #f59e0b;
    --color-status-disconnected: #94a3b8;
    --color-status-error: #dc2626;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --transition: 150ms ease;
}

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

/* Header */
header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

/* Status Indicator */
.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

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

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

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

.status-indicator.reconnecting .status-dot {
    background-color: var(--color-status-connecting);
    animation: pulse 1s infinite;
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Main Content */
main {
    max-width: 960px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* Controls Section */
.controls {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
}

.controls-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.controls-row:last-child {
    margin-bottom: 0;
}

.controls-actions {
    justify-content: center;
    margin-top: 0.5rem;
}

.control-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.control-group label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.control-group select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.9375rem;
    color: var(--color-text);
    background-color: var(--color-surface);
    cursor: pointer;
    transition: border-color var(--transition), box-shadow var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

.control-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Start/Stop Button */
.btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
    min-width: 140px;
}

.btn:active {
    transform: scale(0.97);
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn-start {
    background-color: var(--color-primary);
    color: #ffffff;
}

.btn-start:hover {
    background-color: var(--color-primary-hover);
    box-shadow: var(--shadow-md);
}

.btn-stop {
    background-color: var(--color-stop);
    color: #ffffff;
}

.btn-stop:hover {
    background-color: var(--color-stop-hover);
    box-shadow: var(--shadow-md);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Loading Indicator */
.loading-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem;
    margin-bottom: 1rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.loading-indicator[hidden] {
    display: none;
}

.loading-spinner {
    width: 20px;
    height: 20px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

/* Error Area */
.error-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    margin-bottom: 1rem;
    background-color: var(--color-error-bg);
    border: 1px solid var(--color-error-border);
    border-radius: var(--radius);
}

.error-area[hidden] {
    display: none;
}

.error-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.error-message {
    flex: 1;
    font-size: 0.9375rem;
    color: var(--color-error);
}

.error-dismiss {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-error);
    cursor: pointer;
    padding: 0 0.25rem;
    line-height: 1;
    opacity: 0.7;
    transition: opacity var(--transition);
}

.error-dismiss:hover {
    opacity: 1;
}

.error-dismiss:focus-visible {
    outline: 2px solid var(--color-error);
    outline-offset: 2px;
    border-radius: 2px;
}

/* Transcript Section */
.transcript-section {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.transcript-header {
    display: flex;
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-bg);
}

.transcript-column-header {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.source-header {
    color: var(--color-source);
    border-right: 1px solid var(--color-border);
}

.target-header {
    color: var(--color-target);
}

/* Transcript Area */
.transcript-area {
    height: 400px;
    overflow-y: auto;
    scroll-behavior: smooth;
}

.transcript-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

/* Transcript Segments */
.transcript-segment {
    display: flex;
    border-bottom: 1px solid var(--color-border);
}

.transcript-segment:last-child {
    border-bottom: none;
}

.segment-source,
.segment-target {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    line-height: 1.5;
}

.segment-source {
    color: var(--color-source);
    background-color: var(--color-source-bg);
    border-right: 1px solid var(--color-border);
}

.segment-target {
    color: var(--color-target);
    background-color: var(--color-target-bg);
}

.segment-source.partial,
.segment-target.partial {
    font-style: italic;
    opacity: 0.8;
}

/* Responsive Layout */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }

    main {
        padding: 1rem;
    }

    .controls {
        padding: 1rem;
    }

    .controls-row {
        flex-direction: column;
    }

    .transcript-area {
        height: 300px;
    }

    .segment-source,
    .segment-target {
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.25rem;
    }

    .btn {
        width: 100%;
    }

    .transcript-header {
        font-size: 0.75rem;
    }

    .transcript-area {
        height: 250px;
    }
}