/* Pixels - Styles */

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --success: #22c55e;
    --background: #0f172a;
    --surface: #1e293b;
    --surface-light: #334155;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #475569;
    --accent: #f59e0b;
}

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

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

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

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

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

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Steps */
.step {
    background: var(--surface);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    overflow: hidden;
    border: 1px solid var(--border);
}

.step-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--surface-light);
    border-bottom: 1px solid var(--border);
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    font-weight: 600;
    font-size: 0.9rem;
}

.step-header h2 {
    font-size: 1.2rem;
    font-weight: 600;
}

.step-content {
    padding: 1.5rem;
}

/* Upload Zones */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.upload-zone:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.upload-zone.dragover {
    border-color: var(--accent);
    background: rgba(245, 158, 11, 0.1);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.upload-zone p {
    color: var(--text);
    margin-bottom: 0.5rem;
}

.hint {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* File Info */
.file-info {
    background: var(--surface-light);
    border-radius: 8px;
    padding: 1.5rem;
}

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

.file-info h3::before {
    content: '✓';
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.info-item .label {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.info-item .value {
    font-weight: 600;
    font-size: 1.1rem;
}

/* Settings Form */
.settings-form {
    display: grid;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group select {
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    color: var(--text);
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group input[type="range"] {
    width: 100%;
    cursor: pointer;
}

.brightness-value {
    color: var(--accent);
    font-weight: 600;
}

/* Buttons */
.btn {
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-small {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
    background: var(--surface-light);
    color: var(--text-muted);
    border: 1px solid var(--border);
}

.btn-small:hover {
    background: var(--border);
    color: var(--text);
}

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

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

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

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

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

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

.btn-success:hover:not(:disabled) {
    opacity: 0.9;
}

/* Progress Bar */
#progress-container {
    margin-top: 1.5rem;
}

#progress-container h3 {
    margin-bottom: 1rem;
}

.progress-bar {
    height: 12px;
    background: var(--surface-light);
    border-radius: 6px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 6px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    text-align: center;
    margin-top: 0.5rem;
    color: var(--text-muted);
}

/* Preview */
#preview-container {
    margin-top: 1.5rem;
    text-align: center;
}

#preview-container h3 {
    margin-bottom: 1rem;
}

#preview-image {
    max-width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border);
}

/* Result */
#result-container {
    margin-top: 1.5rem;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success);
    border-radius: 8px;
    padding: 1.5rem;
}

#result-container h3 {
    color: var(--success);
    margin-bottom: 1rem;
}

.result-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* Footer */
footer {
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
}

/* Preview boxes */
.preview-box {
    flex: 1;
    min-width: 300px;
    max-width: 600px;
    text-align: center;
}

.preview-box img {
    width: 100%;
    height: auto;
}

.preview-comparison {
    margin-top: 1rem;
}

/* Frame slider value */
.preview-frame-value,
.frame-value {
    color: var(--accent);
    font-weight: 600;
    margin-left: 0.5rem;
}

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

    header h1 {
        font-size: 1.75rem;
    }

    .upload-zone {
        padding: 2rem 1rem;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }
}