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

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --border: #2a2a2a;
}

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

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
}

h1 {
    font-size: 1.75rem;
    margin: 0.5rem 0;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Warning Banner */
.warning-banner {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--warning);
    color: var(--warning);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    text-align: center;
    margin-bottom: 2rem;
    font-size: 0.9rem;
}

/* Steps */
.step {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: opacity 0.3s, filter 0.3s;
}

.step.disabled {
    opacity: 0.5;
    pointer-events: none;
    filter: grayscale(0.5);
}

.step.completed .step-number {
    background: var(--success);
}

.step-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.step-number {
    width: 28px;
    height: 28px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.85rem;
}

.step-header h2 {
    font-size: 1rem;
    font-weight: 600;
}

.step-content {
    padding: 1.25rem;
}

.step-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.step-content ul {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    margin-left: 1.5rem;
    font-size: 0.9rem;
}

.step-content code {
    background: var(--bg-tertiary);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.85rem;
}

/* Drop Zone */
.drop-zone {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.05);
}

.drop-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.drop-zone p {
    margin-bottom: 0.25rem;
}

.drop-zone .hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Stats */
.stats {
    display: flex;
    gap: 1.5rem;
    margin: 1rem 0;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg-tertiary);
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    min-width: 80px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

/* Options */
.options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.checkbox-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
}

.checkbox-option input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
}

.input-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
}

.input-option input[type="text"],
.input-option input[type="number"] {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    width: 150px;
    font-size: 0.9rem;
}

.input-option input:focus {
    outline: none;
    border-color: var(--accent);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, opacity 0.2s;
}

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

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

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

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

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

.btn-icon {
    font-size: 1rem;
}

.btn-icon-only {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    padding: 0.25rem;
    opacity: 0.7;
}

.btn-icon-only:hover {
    opacity: 1;
}

/* Progress */
.progress-container {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.3s;
}

.progress-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    min-width: 45px;
}

/* Download Buttons */
.download-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

/* Final Stats */
.final-stats {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success);
    border-radius: 8px;
    padding: 1rem;
    margin-top: 1rem;
}

.final-stats h3 {
    color: var(--success);
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.final-stats .stat-value {
    color: var(--success);
}

/* Log Panel */
.log-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-top: 2rem;
    overflow: hidden;
}

.log-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.log-header h3 {
    font-size: 0.9rem;
    font-weight: 600;
}

.log-content {
    height: 200px;
    overflow-y: auto;
    padding: 0.75rem 1rem;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.8rem;
    line-height: 1.5;
}

.log-entry {
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.log-entry.info {
    color: var(--text-primary);
}

.log-entry.success {
    color: var(--success);
}

.log-entry.warning {
    color: var(--warning);
}

.log-entry.error {
    color: var(--error);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 1rem;
    }

    h1 {
        font-size: 1.4rem;
    }

    .stats {
        justify-content: center;
    }

    .download-buttons {
        flex-direction: column;
    }

    .download-buttons .btn {
        width: 100%;
        justify-content: center;
    }
}