/**
 * FORMAT-CONVERTER.CSS - Image Format Converter
 * Production-level styles
 */

:root {
    --bg: #f7f7f8;
    --bg-white: #ffffff;
    --text: #1a1a1a;
    --text-secondary: #666666;
    --text-muted: #999999;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: rgba(99, 102, 241, 0.1);
    --success: #22c55e;
    --success-light: rgba(34, 197, 94, 0.1);
    --warning: #f59e0b;
    --border: #e5e5e5;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --container: 1200px;
}

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

body {
    font-family: var(--font);
    font-size: 15px;
    line-height: 1.5;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
input, select { font: inherit; }
img, svg { display: block; max-width: 100%; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }

/* Header */
.header { background: var(--bg-white); border-bottom: 1px solid var(--border); padding: 14px 0; }
.header__inner { display: flex; align-items: center; justify-content: space-between; }
.back-btn { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; background: #f5f5f5; border-radius: 10px; color: #333; margin-right: 12px; transition: all 0.2s; text-decoration: none; }
.back-btn:hover { background: var(--primary); color: white; }
.back-btn svg { width: 20px; height: 20px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; }
.logo__icon { width: 28px; height: 28px; color: var(--primary); }
.nav { display: flex; gap: 4px; }
.nav__link { padding: 10px 18px; font-size: 14px; font-weight: 500; color: var(--text-secondary); border-radius: 6px; transition: all 0.2s; }
.nav__link:hover { color: var(--text); background: var(--bg); }
.nav__link--active { color: var(--primary); }

/* Pages */
.page { display: none; flex: 1; }
.page.active { display: flex; align-items: center; justify-content: center; }

/* Upload Page */
.upload-box {
    text-align: center;
    padding: 60px 20px;
    max-width: 600px;
    margin: 0 auto;
}

.upload-title { font-size: 42px; font-weight: 700; margin-bottom: 16px; }
.upload-desc { font-size: 18px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 40px; }
.upload-desc .highlight { color: var(--primary); }

.dropzone { display: flex; flex-direction: column; align-items: center; }

.upload-btn {
    display: inline-flex;
    padding: 18px 48px;
    font-size: 18px;
    font-weight: 600;
    color: white;
    background: var(--primary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: var(--shadow);
}

.upload-btn:hover { background: var(--primary-hover); transform: translateY(-2px); }

.upload-hint { margin-top: 16px; font-size: 14px; color: var(--text-muted); }

/* Convert Page */
#page-convert.active { display: flex; align-items: stretch; padding: 0; }

.convert-container {
    display: grid;
    grid-template-columns: 1fr 360px;
    width: 100%;
    min-height: calc(100vh - 120px);
}

/* Preview Section */
.preview-section {
    padding: 24px;
    background: var(--bg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.preview-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
}

.preview-title span {
    color: var(--primary);
}

.add-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    background: var(--primary-light);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.add-more-btn:hover { background: rgba(99, 102, 241, 0.15); }
.add-more-btn svg { width: 16px; height: 16px; }
.add-more-btn input { display: none; }

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 16px;
    flex: 1;
    overflow-y: auto;
    align-content: flex-start;
}

.image-card {
    position: relative;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.2s;
}

.image-card:hover { box-shadow: var(--shadow); }

.image-card img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.image-card__info {
    padding: 8px 10px;
    border-top: 1px solid var(--border);
}

.image-card__name {
    font-size: 12px;
    font-weight: 500;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.image-card__meta {
    font-size: 11px;
    color: var(--text-muted);
}

.image-card__remove {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.6);
    color: white;
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.2s;
}

.image-card:hover .image-card__remove { opacity: 1; }
.image-card__remove svg { width: 14px; height: 14px; }

/* Settings Panel */
.settings-panel {
    padding: 28px;
    background: var(--bg-white);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.panel-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}

/* Format Grid */
.format-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.format-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 12px;
    background: var(--bg);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.2s;
    text-align: center;
}

.format-btn:hover { border-color: var(--primary); }

.format-btn.active {
    border-color: var(--primary);
    background: var(--primary-light);
}

.format-icon {
    font-size: 14px;
    font-weight: 800;
    color: var(--primary);
    background: var(--bg-white);
    padding: 6px 10px;
    border-radius: 6px;
    margin-bottom: 8px;
}

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

.format-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 2px;
}

.format-desc {
    font-size: 11px;
    color: var(--text-muted);
    line-height: 1.3;
}

/* Quality Section */
.quality-section {
    padding: 20px;
    background: var(--bg);
    border-radius: var(--radius-lg);
}

.quality-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.quality-header label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.quality-value {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
}

.quality-slider {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    background: var(--border);
    border-radius: 3px;
    outline: none;
}

.quality-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(99, 102, 241, 0.3);
    transition: transform 0.2s;
}

.quality-slider::-webkit-slider-thumb:hover { transform: scale(1.15); }

.quality-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 11px;
    color: var(--text-muted);
}

/* Transparency Note */
.transparency-note {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 14px;
    background: rgba(245, 158, 11, 0.1);
    border-radius: var(--radius);
    font-size: 13px;
    color: var(--warning);
    line-height: 1.5;
}

.transparency-note svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    margin-top: 1px;
}

.transparency-note.hidden { display: none; }

/* Convert Button */
.convert-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 16px;
    font-size: 16px;
    font-weight: 600;
    color: white;
    background: var(--primary);
    border-radius: var(--radius-lg);
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
    margin-top: auto;
}

.convert-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.35);
}

.convert-btn svg { width: 20px; height: 20px; }

.privacy-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 16px;
}

.privacy-note svg { width: 14px; height: 14px; color: var(--success); }

/* Download Page */
#page-download.active { display: flex; }

.download-box {
    text-align: center;
    padding: 48px 24px;
    max-width: 700px;
    margin: 0 auto;
}

.success-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    color: var(--success);
}

.success-icon svg { width: 100%; height: 100%; }

.download-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
}

.download-info {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* Converted Grid */
.converted-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 12px;
    margin-bottom: 32px;
    max-height: 200px;
    overflow-y: auto;
}

.converted-item {
    position: relative;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.converted-item img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.converted-item__download {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.5);
    opacity: 0;
    transition: opacity 0.2s;
}

.converted-item:hover .converted-item__download { opacity: 1; }

.converted-item__download svg {
    width: 24px;
    height: 24px;
    color: white;
}

/* Download Actions */
.download-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    color: white;
    background: var(--success);
    border-radius: var(--radius-lg);
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(34, 197, 94, 0.25);
}

.download-btn:hover {
    background: #16a34a;
    transform: translateY(-2px);
}

.download-btn svg { width: 20px; height: 20px; }

/* Share Section */
.share-section { margin-bottom: 32px; }
.share-label { font-size: 13px; color: var(--text-muted); margin-bottom: 12px; }

.share-buttons { display: flex; justify-content: center; gap: 12px; }

.share-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s;
}

.share-btn svg { width: 20px; height: 20px; }

.share-btn--twitter { background: #1da1f2; color: white; }
.share-btn--whatsapp { background: #25d366; color: white; }
.share-btn--copy { background: var(--bg); border: 1px solid var(--border); color: var(--text-secondary); }
.share-btn:hover { transform: scale(1.1); }

/* More Actions */
.more-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 14px;
}

.link-btn {
    color: var(--primary);
    font-weight: 500;
    background: none;
    border: none;
    cursor: pointer;
}

.link-btn:hover { text-decoration: underline; }
.divider { color: var(--text-muted); }

/* Processing Overlay */
.processing {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.processing.active { display: flex; }

.processing__modal {
    background: var(--bg-white);
    padding: 40px 48px;
    border-radius: var(--radius-lg);
    text-align: center;
    min-width: 300px;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 20px;
}

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

.processing__text {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 16px;
}

.progress {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress__bar {
    height: 100%;
    background: var(--primary);
    width: 0%;
    transition: width 0.3s;
}

.processing__count {
    font-size: 13px;
    color: var(--text-muted);
}

/* Footer */
.footer {
    padding: 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    border-top: 1px solid var(--border);
    background: var(--bg-white);
}

/* Responsive */
@media (max-width: 900px) {
    .convert-container {
        grid-template-columns: 1fr;
    }
    
    .settings-panel {
        border-left: none;
        border-top: 1px solid var(--border);
    }
    
    .preview-section {
        max-height: 40vh;
    }
}

@media (max-width: 600px) {
    .nav { display: none; }
    
    .upload-title { font-size: 28px; }
    .upload-desc { font-size: 16px; }
    .upload-btn { padding: 16px 32px; font-size: 16px; }
    
    .format-grid { grid-template-columns: 1fr; }
    
    .download-title { font-size: 24px; }
}