/* ============ Upload Section ============ */
.upload-section {
    margin-bottom: 32px;
}

.drop-zone {
    background: var(--bg-card);
    border: 2px dashed var(--border-strong);
    border-radius: var(--radius-lg);
    padding: 48px 24px;
    text-align: center;
    transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
    cursor: pointer;
}

.drop-zone:hover {
    border-color: var(--accent);
    background: rgba(34, 211, 238, 0.05);
    box-shadow: 0 0 24px var(--accent-glow);
}

.drop-zone.dragover {
    border-color: var(--accent);
    background: rgba(34, 211, 238, 0.1);
    transform: scale(1.01);
    box-shadow: 0 0 32px var(--accent-glow);
    animation: pulse 1.2s var(--ease) infinite;
}

.drop-zone-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.drop-zone-actions {
    margin-top: 16px;
    display: flex;
    justify-content: center;
    gap: 8px;
}

.upload-icon {
    color: var(--text-muted);
    margin-bottom: 8px;
}

.drop-zone:hover .upload-icon,
.drop-zone.dragover .upload-icon {
    color: var(--accent);
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 24px var(--accent-glow); }
    50%      { box-shadow: 0 0 40px var(--accent-glow); }
}

.drop-title {
    font-size: 18px;
    font-weight: 500;
    color: var(--text);
}

.drop-subtitle {
    color: var(--text-muted);
    font-size: 14px;
}

.drop-subtitle a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.drop-subtitle a:hover {
    text-decoration: underline;
}

.drop-subtitle kbd {
    background: var(--bg-elevated);
    border: 1px solid var(--border-strong);
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 12px;
    font-family: inherit;
}

/* Upload Progress */
.progress-container {
    margin-top: 16px;
}

.progress-item {
    background: var(--bg-card);
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 8px;
    border: 1px solid var(--border);
}

.progress-item-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 13px;
}

.progress-filename {
    color: var(--text);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 60%;
}

.progress-percent {
    color: var(--primary);
    font-weight: 600;
}

.progress-bar {
    height: 6px;
    background: var(--bg);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--primary);
    width: 0%;
    transition: width 0.15s;
}

.progress-fill.done {
    background: var(--success);
}

.progress-fill.error {
    background: var(--danger);
}