:root {
    --bg-primary: #0f0f12;
    --bg-secondary: #1a1a21;
    --bg-tertiary: #252530;
    --accent: #6366f1;
    --accent-light: #818cf8;
    --text-primary: #f1f1f4;
    --text-secondary: #9898a6;
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --border: #2e2e3a;
}

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

body {
    font-family: 'Noto Sans TC', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container { max-width: 1200px; margin: 0 auto; padding: 2rem; }

header {
    text-align: center;
    padding: 3rem 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

header p { color: var(--text-secondary); font-size: 1.1rem; }

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--accent);
    color: white;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-top: 0.5rem;
}

.status-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    margin-bottom: 2rem;
    border: 1px solid var(--border);
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--warning);
    animation: pulse 2s infinite;
}

.status-indicator.ready { background: var(--success); animation: none; }
.status-indicator.error { background: var(--error); animation: none; }

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

.status-text {
    flex: 1;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
}

.main-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 2rem;
}

@media (max-width: 900px) {
    .main-grid { grid-template-columns: 1fr; }
}

.panel {
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border);
    overflow: hidden;
}

.panel-header {
    padding: 1rem 1.5rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.panel-content { padding: 1.5rem; }

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

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

.form-group textarea,
.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group textarea:focus,
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-group textarea { resize: vertical; min-height: 100px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: white;
    width: 100%;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

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

.output-area {
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: 12px;
    overflow: hidden;
}

.output-area img { max-width: 100%; height: auto; display: block; }

.output-placeholder { text-align: center; color: var(--text-secondary); }
.output-placeholder svg { width: 64px; height: 64px; stroke: var(--border); margin-bottom: 1rem; }

.security-info {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.security-info h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: var(--accent-light);
}

.security-info h3 svg { width: 20px; height: 20px; }

.security-list { list-style: none; display: grid; gap: 0.5rem; }

.security-list li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.security-list li::before { content: '✓'; color: var(--success); font-weight: bold; }

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.download-btn {
    margin-top: 1rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.download-btn:hover { background: var(--border); }

.worker-info {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid var(--accent);
    border-radius: 8px;
    font-size: 0.85rem;
}

.worker-info strong { color: var(--accent-light); }

.file-upload-wrapper {
    position: relative;
}

.file-upload-wrapper input[type="file"] {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
    cursor: pointer;
    z-index: 2;
}

.file-upload-info {
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border: 2px dashed var(--border);
    border-radius: 8px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all 0.2s;
}

.file-upload-wrapper:hover .file-upload-info {
    border-color: var(--accent);
    background: rgba(99, 102, 241, 0.05);
}

.file-upload-info.has-file {
    border-color: var(--success);
    color: var(--success);
}