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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #f5f5f7;
    color: #1d1d1f;
    min-height: 100vh;
}

.container {
    max-width: 640px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 32px;
}

header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.subtitle {
    color: #86868b;
    font-size: 16px;
}

.card {
    background: #fff;
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 16px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.card h2 {
    font-size: 20px;
    margin-bottom: 16px;
}

.card h3 {
    font-size: 14px;
    color: #86868b;
    margin: 16px 0 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hidden {
    display: none;
}

/* Drop Zone */
.drop-zone {
    border: 2px dashed #d2d2d7;
    border-radius: 12px;
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: #007aff;
    background: #f0f7ff;
}

.drop-zone-content svg {
    color: #86868b;
    margin-bottom: 12px;
}

.drop-zone-content p {
    color: #86868b;
    font-size: 15px;
}

/* Theme Info */
.theme-info {
    background: #f5f5f7;
    border-radius: 8px;
    padding: 12px 16px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
}

.info-row + .info-row {
    border-top: 1px solid #e5e5e7;
}

.info-row .label {
    color: #86868b;
    font-size: 14px;
}

.info-row .value {
    font-weight: 500;
    font-size: 14px;
}

/* Color Preview */
.color-preview {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.color-swatch {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.color-swatch .swatch {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    border: 1px solid #e5e5e7;
}

.color-swatch .swatch-label {
    font-size: 10px;
    color: #86868b;
}

/* Icon Preview */
.icon-preview {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.icon-preview img {
    width: 38px;
    height: 38px;
    border-radius: 4px;
    background: #f5f5f7;
}

/* Button */
.btn-primary {
    display: block;
    width: 100%;
    padding: 14px;
    margin-top: 20px;
    background: #007aff;
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary:hover {
    background: #0062cc;
}

.btn-primary:disabled {
    background: #d2d2d7;
    cursor: not-allowed;
}

/* Progress */
.progress-bar {
    height: 6px;
    background: #e5e5e7;
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-fill {
    height: 100%;
    background: #007aff;
    border-radius: 3px;
    transition: width 0.3s;
    width: 0%;
}

#progress-text {
    font-size: 14px;
    color: #86868b;
    text-align: center;
}

/* Guide */
.guide {
    margin-top: 20px;
    background: #f5f5f7;
    border-radius: 8px;
    padding: 16px;
}

.guide h3 {
    margin-top: 0;
    color: #1d1d1f;
}

.guide ol {
    padding-left: 20px;
}

.guide li {
    font-size: 14px;
    line-height: 1.6;
    color: #424245;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 32px;
}

footer p {
    font-size: 12px;
    color: #86868b;
}