.converter-section {
    padding: 1rem 0 3rem;
}
.converter-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: clamp(1.25rem, 3vw, 2.25rem);
    position: relative;
    overflow: hidden;
    max-width: 920px;
    margin: 0 auto;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.converter-card::before {
    content: '';
    position: absolute;
    inset: 0 0 auto 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent), #a855f7);
    opacity: 0.9;
}
.converter-card[data-state='dragging'] {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1), var(--shadow-xl);
}
.converter-card[data-state='processing'] {
    border-color: rgba(99, 102, 241, 0.3);
}

.upload-zone {
    border: 2px dashed var(--color-border-strong);
    border-radius: var(--radius-lg);
    padding: clamp(2rem, 6vw, 3.5rem) 1.5rem;
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
    background: linear-gradient(180deg, #fafbff, var(--color-surface-alt));
    position: relative;
}
.upload-zone:hover,
.upload-zone:focus-visible {
    border-color: var(--color-primary);
    background: linear-gradient(180deg, var(--color-primary-soft), #f5f6ff);
}
.upload-zone:focus-visible {
    outline: none;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}
.converter-card[data-state='dragging'] .upload-zone {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
    transform: scale(1.005);
}
.upload-inner {
    max-width: 460px;
    margin: 0 auto;
}
.upload-icon {
    color: var(--color-primary);
    width: 72px;
    height: 72px;
    margin: 0 auto 1.25rem;
    transition: transform var(--transition-base);
}
.upload-zone:hover .upload-icon,
.converter-card[data-state='dragging'] .upload-icon {
    transform: translateY(-4px);
}
.upload-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.85rem;
}
.upload-divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0.5rem 0 1rem;
    color: var(--color-text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.upload-divider::before,
.upload-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}
.upload-divider span {
    flex-shrink: 0;
}
.upload-hint {
    margin-top: 1.1rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.url-toggle {
    width: 100%;
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    justify-content: space-between;
    border-radius: var(--radius-md);
    font-size: 0.92rem;
}
.toggle-chevron {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-base);
    color: var(--color-text-muted);
}
.url-toggle[aria-expanded='true'] .toggle-chevron {
    transform: rotate(180deg);
}

.url-import {
    margin-top: 0.75rem;
    padding: 1.1rem;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    animation: fadeSlideIn var(--transition-base) ease;
}
@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}
.url-input-group {
    display: flex;
    gap: 0.6rem;
    align-items: stretch;
}
.url-input-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0 0.85rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}
.url-input-wrapper:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}
.url-input-wrapper svg {
    width: 18px;
    height: 18px;
    color: var(--color-text-muted);
    flex-shrink: 0;
}
.url-input-wrapper input {
    flex: 1;
    min-width: 0;
    border: none;
    background: transparent;
    padding: 0.7rem 0;
    font-size: 0.95rem;
    color: var(--color-text);
}
.url-input-wrapper input::placeholder {
    color: var(--color-text-muted);
}
.url-hint {
    margin-top: 0.65rem;
    font-size: 0.82rem;
    color: var(--color-text-muted);
}

.file-queue-section {
    margin-top: 1.75rem;
    animation: fadeSlideIn var(--transition-base) ease;
}
.queue-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}
.queue-info {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
}
.queue-info h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-secondary);
}
.queue-count {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    font-weight: 500;
}
.add-more-btn {
    font-weight: 600;
}

.global-output {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
    background: var(--color-primary-soft);
    border: 1px solid rgba(99, 102, 241, 0.18);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
}
.global-output label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary);
}
.global-output .select-wrapper select {
    background: white;
    border-color: rgba(99, 102, 241, 0.25);
    padding: 0.5rem 2rem 0.5rem 0.8rem;
    font-size: 0.9rem;
}

.file-queue {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    max-height: 480px;
    overflow-y: auto;
    padding: 0.35rem 0.35rem 0.35rem 0;
    margin: 0 -0.35rem 1.25rem 0;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border-strong) transparent;
}
.file-queue::-webkit-scrollbar {
    width: 7px;
}
.file-queue::-webkit-scrollbar-track {
    background: transparent;
}
.file-queue::-webkit-scrollbar-thumb {
    background: var(--color-border-strong);
    border-radius: var(--radius-pill);
}
.file-queue::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

.file-card {
    display: grid;
    grid-template-columns: 78px 1fr auto;
    align-items: center;
    gap: 0.9rem;
    padding: 0.8rem;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    animation: cardIn var(--transition-base) ease;
    position: relative;
}
@keyframes cardIn {
    from { opacity: 0; transform: translateX(-8px) scale(0.98); }
    to { opacity: 1; transform: translateX(0) scale(1); }
}
.file-card:hover {
    border-color: var(--color-border-strong);
    background: #f8f9ff;
}
.file-card[data-status='uploading'] {
    border-color: rgba(59, 130, 246, 0.35);
    background: linear-gradient(135deg, var(--color-surface-alt), rgba(59, 130, 246, 0.05));
}
.file-card[data-status='converting'] {
    border-color: rgba(99, 102, 241, 0.4);
    background: linear-gradient(135deg, var(--color-surface-alt), rgba(99, 102, 241, 0.06));
}
.file-card[data-status='completed'] {
    border-color: rgba(16, 185, 129, 0.35);
    background: linear-gradient(135deg, var(--color-surface-alt), rgba(16, 185, 129, 0.05));
}
.file-card[data-status='failed'] {
    border-color: rgba(239, 68, 68, 0.35);
    background: linear-gradient(135deg, var(--color-surface-alt), rgba(239, 68, 68, 0.05));
}
.file-card.is-removing {
    animation: cardOut var(--transition-base) ease forwards;
}
@keyframes cardOut {
    to { opacity: 0; transform: translateX(20px) scale(0.98); max-height: 0; padding-top: 0; padding-bottom: 0; margin-bottom: 0; border-width: 0; }
}

.file-thumb {
    width: 78px;
    height: 78px;
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    flex-shrink: 0;
}
.thumb-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    padding: 18px;
}
.thumb-placeholder svg {
    width: 100%;
    height: 100%;
    opacity: 0.5;
}
.thumb-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.file-info {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}
.file-name-row {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    justify-content: space-between;
}
.file-name {
    font-size: 0.94rem;
    font-weight: 600;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    flex: 1;
    min-width: 0;
}
.file-meta {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    flex-wrap: wrap;
    font-size: 0.82rem;
    color: var(--color-text-secondary);
}
.file-size {
    color: var(--color-text-muted);
    font-weight: 500;
}
.file-arrow {
    color: var(--color-text-muted);
    opacity: 0.7;
}
.file-format-input {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.78rem;
    color: var(--color-secondary);
    background: var(--color-surface);
    padding: 0.18rem 0.45rem;
    border-radius: 5px;
    border: 1px solid var(--color-border);
}
.file-format-output {
    display: inline-flex;
}
.file-format-output select {
    font-size: 0.8rem;
    padding: 0.3rem 1.7rem 0.3rem 0.55rem;
    border-color: rgba(99, 102, 241, 0.25);
    background: white;
    color: var(--color-primary);
}

.file-status-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.file-status {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.22rem 0.6rem;
    border-radius: var(--radius-pill);
    line-height: 1.4;
}
.file-status::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}
.file-status[data-status='ready'] {
    background: #f1f5f9;
    color: var(--color-text-secondary);
}
.file-status[data-status='ready']::before {
    background: var(--color-text-muted);
}
.file-status[data-status='uploading'] {
    background: rgba(59, 130, 246, 0.12);
    color: var(--color-info);
}
.file-status[data-status='uploading']::before {
    background: var(--color-info);
    animation: pulse 1.2s ease-in-out infinite;
}
.file-status[data-status='converting'] {
    background: rgba(99, 102, 241, 0.12);
    color: var(--color-primary);
}
.file-status[data-status='converting']::before {
    background: var(--color-primary);
    animation: pulse 1.2s ease-in-out infinite;
}
.file-status[data-status='completed'] {
    background: var(--color-success-soft);
    color: var(--color-success);
}
.file-status[data-status='completed']::before {
    background: var(--color-success);
}
.file-status[data-status='failed'] {
    background: var(--color-error-soft);
    color: var(--color-error);
}
.file-status[data-status='failed']::before {
    background: var(--color-error);
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.85); }
}

.conversion-progress {
    margin-bottom: 1.25rem;
}
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-surface-alt);
    border-radius: var(--radius-pill);
    overflow: hidden;
    margin-bottom: 0.5rem;
}
.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-pill);
    transition: width var(--transition-base) ease;
    background-size: 200% 100%;
    animation: shimmer 2s linear infinite;
}
@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}
.progress-text {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-align: right;
}

.converter-footer {
    border-top: 1px solid var(--color-border);
    padding-top: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: flex-end;
}
.terms-label {
    width: 100%;
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    cursor: pointer;
    padding: 0.5rem 0;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    user-select: none;
}
.terms-label input[type='checkbox'] {
    margin-top: 0.22rem;
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    accent-color: var(--color-primary);
    cursor: pointer;
}
.terms-label a {
    color: var(--color-primary);
    font-weight: 500;
}
.action-buttons {
    width: 100%;
    display: flex;
    justify-content: flex-end;
}
.convert-btn {
    min-width: 200px;
}