:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-card: #1a1a1a;
    --bg-hover: #222222;
    --bg-active: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #aaaaaa;
    --text-muted: #666666;
    --border-color: #2a2a2a;
    --shadow: rgba(255,255,255,0.02);
    --shadow-modal: rgba(0,0,0,0.7);
    --tag-bg: #222222;
    --tag-text: #aaaaaa;
    --drop-border: #333333;
    --success-bg: #1a2a1a;
    --success-text: #8fdf8f;
    --error-bg: #2a1a1a;
    --error-text: #ff6b6b;
    --warning-bg: #2a2a1a;
    --warning-text: #ffd93d;
    --modal-overlay: rgba(0,0,0,0.8);
    --transition-speed: 0.4s;
    --popup-bg: #1a1a1a;
    --footer-bg: #0d0d0d;
}

body.light-theme {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-hover: #f0f0f0;
    --bg-active: #e8e8e8;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-muted: #999999;
    --border-color: #e0e0e0;
    --tag-bg: #f0f0f0;
    --tag-text: #666666;
    --drop-border: #d0d0d0;
    --success-bg: #d4edda;
    --success-text: #155724;
    --error-bg: #f8d7da;
    --error-text: #721c24;
    --warning-bg: #fff3cd;
    --warning-text: #856404;
    --modal-overlay: rgba(0,0,0,0.5);
    --popup-bg: #ffffff;
    --footer-bg: #fafafa;
}

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

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    width: 100vw;
    overflow: hidden;
    transition: background var(--transition-speed) ease, color var(--transition-speed) ease;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes popupIn {
    from { opacity: 0; transform: scale(0.9) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

/* ===== WAVES ===== */
.waves {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
    pointer-events: none;
}

.wave {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
}

.wave1 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, transparent 70%);
}

.wave2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(200, 200, 200, 0.1) 0%, transparent 70%);
}

.wave3 {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(180, 180, 180, 0.08) 0%, transparent 70%);
}

.wave4 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(220, 220, 220, 0.1) 0%, transparent 70%);
}

.wave5 {
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, rgba(190, 190, 190, 0.09) 0%, transparent 70%);
}

body.light-theme .wave1 {
    background: radial-gradient(circle, rgba(100, 100, 100, 0.15) 0%, transparent 70%);
}

body.light-theme .wave2 {
    background: radial-gradient(circle, rgba(80, 80, 80, 0.12) 0%, transparent 70%);
}

body.light-theme .wave3 {
    background: radial-gradient(circle, rgba(120, 120, 120, 0.1) 0%, transparent 70%);
}

body.light-theme .wave4 {
    background: radial-gradient(circle, rgba(90, 90, 90, 0.12) 0%, transparent 70%);
}

body.light-theme .wave5 {
    background: radial-gradient(circle, rgba(110, 110, 110, 0.13) 0%, transparent 70%);
}

/* ===== CENTER BACKGROUND TEXT ===== */
.center-bg-text {
    position: fixed;
    top: 55%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: -1;
    pointer-events: none;
    opacity: 0.15;
}

.center-bg-text h1 {
    font-size: 4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -1px;
}

.center-bg-text p {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: 1px;
}

body.light-theme .center-bg-text {
    opacity: 0.1;
}

/* ===== DRAG OVERLAY ===== */
.drag-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.92);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
    animation: fadeIn 0.3s ease;
}

.drag-overlay.show { display: flex; }

.drag-overlay-content {
    text-align: center;
    padding: 40px;
    animation: float 2s ease-in-out infinite;
}

.drag-overlay-content i {
    font-size: 5rem;
    color: #fff;
    margin-bottom: 20px;
    animation: bounce 1s infinite;
}

.drag-overlay-content h2 {
    font-size: 2.5rem;
    font-weight: 300;
    color: #fff;
    margin-bottom: 10px;
}

.drag-overlay-content p {
    color: #aaa;
    font-size: 1.1rem;
}

/* ===== APP ===== */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
    background: transparent;
    transition: background var(--transition-speed) ease;
}

/* ===== HEADER ===== */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 20px;
    flex-shrink: 0;
    height: 60px;
    display: flex;
    align-items: center;
    transition: all var(--transition-speed) ease;
    overflow: hidden;
}

.header-content {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    animation: slideIn 0.6s ease;
    flex-shrink: 0;
}

.logo-img {
    height: 32px;
    width: auto;
    max-width: 32px;
    object-fit: contain;
}

.nav-tabs {
    display: flex;
    gap: 4px;
    background: var(--bg-primary);
    padding: 4px;
    border-radius: 10px;
    flex-shrink: 0;
}

.nav-tab {
    background: transparent;
    border: none;
    padding: 6px 16px;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    position: relative;
    white-space: nowrap;
}

.nav-tab:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.nav-tab.active {
    background: var(--bg-secondary);
    color: var(--text-primary);
    box-shadow: 0 2px 8px var(--shadow);
    transform: translateY(0);
}

.nav-tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 30%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    animation: fadeIn 0.3s ease;
}

.header-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    width: 34px;
    height: 34px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.btn-icon:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: scale(1.1);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    display: flex;
    flex: 1;
    min-height: 0;
    padding: 16px;
    gap: 16px;
    overflow: hidden;
}

/* ===== SIDEBAR ===== */
.sidebar {
    width: 220px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow-y: auto;
    height: 100%;
    padding-right: 2px;
}

.sidebar::-webkit-scrollbar {
    width: 3px;
}
.sidebar::-webkit-scrollbar-track {
    background: transparent;
}
.sidebar::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.sidebar-section {
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
    animation: slideIn 0.6s ease;
    overflow: hidden;
}

.sidebar-section.active-section {
    border-left: 2px solid var(--text-primary);
}

.sidebar-section h3 {
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 8px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ===== WHAT WE REMOVE ===== */
.metadata-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.tag {
    background: var(--tag-bg);
    padding: 3px 9px;
    border-radius: 10px;
    font-size: 0.6rem;
    color: var(--tag-text);
    font-weight: 500;
    border: 1px solid transparent;
}

/* ===== STATS ===== */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 6px;
}

.stat-item {
    text-align: center;
    min-width: 0;
    overflow: hidden;
    background: var(--bg-primary);
    border-radius: 6px;
    padding: 8px 4px;
    border: 1px solid var(--border-color);
}

.stat-value {
    display: block;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.stat-label {
    font-size: 0.5rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-top: 2px;
}

/* ===== ACTIVE FILE ===== */
.active-file-display {
    display: flex;
    flex-direction: column;
    gap: 3px;
    background: var(--bg-primary);
    border-radius: 6px;
    padding: 8px 10px;
    border: 1px solid var(--border-color);
}

.active-file-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    word-break: break-all;
}

.active-file-size {
    font-size: 0.65rem;
    color: var(--text-muted);
}

/* ===== DOWNLOAD METADATA ===== */
.btn-full {
    width: 100%;
    justify-content: center;
}

/* ===== MAIN AREA ===== */
.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    height: 100%;
    overflow: hidden;
}

/* ===== TAB CONTENT ===== */
.tab-content {
    display: none;
    flex-direction: column;
    height: 100%;
    gap: 12px;
    overflow-y: auto;
    padding-right: 4px;
    animation: fadeInScale 0.5s ease;
}

.tab-content.active { display: flex; }

.tab-content::-webkit-scrollbar {
    width: 4px;
}
.tab-content::-webkit-scrollbar-track {
    background: transparent;
}
.tab-content::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

/* ===== DROP ZONE ===== */
.drop-zone {
    background: var(--bg-secondary);
    border: 2px dashed var(--drop-border);
    border-radius: 14px;
    padding: 15px;
    text-align: center;
    transition: all var(--transition-speed) ease;
    cursor: pointer;
    flex-shrink: 0;
    height: 190px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeInScale 0.6s ease;
    position: relative;
    overflow: hidden;
}

.drop-zone:hover {
    border-color: var(--text-secondary);
    background: var(--bg-hover);
}

.drop-zone .drop-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    position: relative;
    z-index: 1;
    width: 100%;
}

.drop-content i {
    font-size: 2.5rem;
    color: var(--text-muted);
    transition: all 0.5s ease;
}

.drop-zone:hover .drop-content i {
    transform: translateY(-8px) scale(1.1);
    color: var(--text-secondary);
}

.drop-content h2 {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.drop-content p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

#fileInput { display: none; }

/* ===== TOOLBAR ===== */
.toolbar {
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 10px 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 8px;
    flex-shrink: 0;
    animation: slideUp 0.5s ease;
}

.toolbar-left {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    min-width: 0;
}

.file-count {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.85rem;
    white-space: nowrap;
}

.toolbar-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.toolbar-right {
    display: flex;
    gap: 6px;
}

/* ===== BUTTONS ===== */
.btn {
    padding: 6px 14px;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    transition: width 0.6s ease, height 0.6s ease, top 0.6s ease, left 0.6s ease;
}

.btn:active::after {
    width: 300px;
    height: 300px;
    top: -100px;
    left: -100px;
}

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

.btn-primary:hover:not(:disabled) {
    opacity: 0.85;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(255,255,255,0.15);
}

.btn-primary:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: none;
}

.btn-success {
    background: var(--text-primary);
    color: var(--bg-primary);
}

.btn-success:hover:not(:disabled) {
    opacity: 0.85;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(255,255,255,0.15);
}

.btn-success:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: none;
}

.btn-danger {
    background: transparent;
    color: #ff6b6b;
    border: 1px solid #ff6b6b;
    padding: 6px 12px;
}

.btn-danger:hover {
    background: #ff6b6b;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(255,107,107,0.3);
}

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

.btn-outline:hover {
    background: var(--bg-hover);
    border-color: var(--text-secondary);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 4px 10px;
    font-size: 0.75rem;
}

.btn .fa-spinner {
    animation: spin 1s linear infinite;
}

/* ===== FILE LIST ===== */
.file-list-container {
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 150px;
    animation: fadeInScale 0.5s ease;
}

.file-list-header {
    display: flex;
    justify-content: space-between;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.file-list {
    flex: 1;
    overflow-y: auto;
    padding: 4px 6px;
}

.file-list::-webkit-scrollbar {
    width: 4px;
}
.file-list::-webkit-scrollbar-track {
    background: transparent;
}
.file-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 8px 10px;
    border-radius: 6px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    gap: 10px;
    cursor: pointer;
    border-left: 2px solid transparent;
    animation: slideIn 0.3s ease;
}

.file-item:hover {
    background: var(--bg-hover);
    transform: translateX(4px);
}

.file-item.selected {
    background: var(--bg-active);
    border-left-color: var(--text-primary);
    box-shadow: 0 0 20px rgba(255,255,255,0.03);
}

.file-item .checkbox {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-color);
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
    pointer-events: none;
}

.file-item.selected .checkbox {
    background: var(--text-primary);
    border-color: var(--text-primary);
    transform: scale(1.1);
}

.file-item.selected .checkbox i {
    display: block;
    color: var(--bg-primary);
}

.file-item .checkbox i {
    display: none;
    font-size: 0.6rem;
}

.file-item .file-icon {
    font-size: 1.1rem;
    color: var(--text-secondary);
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.file-item.selected .file-icon {
    transform: scale(1.1);
}

.file-item .file-info {
    flex: 1;
    min-width: 0;
}

.file-item .file-name {
    font-weight: 500;
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.file-item .file-meta {
    display: flex;
    gap: 10px;
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 1px;
    flex-wrap: wrap;
}

.file-item .file-status {
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.65rem;
    font-weight: 500;
    flex-shrink: 0;
}

.file-status.pending {
    background: var(--tag-bg);
    color: var(--text-secondary);
}

.file-status.processing {
    background: var(--warning-bg);
    color: var(--warning-text);
    animation: pulse 1s infinite;
}

.file-status.done {
    background: var(--success-bg);
    color: var(--success-text);
}

.file-status.error {
    background: var(--error-bg);
    color: var(--error-text);
}

/* ===== REMOVE METADATA ===== */
.remove-panel {
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    flex-shrink: 0;
    animation: fadeInScale 0.5s ease;
}

.remove-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 8px;
}

.remove-header h3 {
    font-size: 0.95rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
}

.remove-header-actions {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.remove-body {
    padding: 16px;
}

.remove-info {
    margin-bottom: 12px;
}

.remove-stats {
    display: flex;
    gap: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
    background: var(--bg-primary);
    border-radius: 6px;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
}

.remove-stats span strong {
    color: var(--text-primary);
}

.remove-files-list {
    background: var(--bg-primary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
    padding: 10px 14px;
    max-height: 200px;
    overflow-y: auto;
}

.remove-files-list::-webkit-scrollbar {
    width: 3px;
}
.remove-files-list::-webkit-scrollbar-track {
    background: transparent;
}
.remove-files-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.remove-empty-msg {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
    padding: 10px 0;
}

.remove-file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 4px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8rem;
}

.remove-file-item:last-child {
    border-bottom: none;
}

.remove-file-item .rfi-name {
    color: var(--text-primary);
    font-weight: 500;
}

.remove-file-item .rfi-status {
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 10px;
}

.remove-file-item .rfi-status.pending {
    background: var(--tag-bg);
    color: var(--text-secondary);
}

.remove-file-item .rfi-status.done {
    background: var(--success-bg);
    color: var(--success-text);
}

.remove-file-item .rfi-status.error {
    background: var(--error-bg);
    color: var(--error-text);
}

.remove-file-item .rfi-status.processing {
    background: var(--warning-bg);
    color: var(--warning-text);
    animation: pulse 1s infinite;
}

/* ===== CURRENT FILE INDICATOR ===== */
.current-file-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 8px 14px;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
    animation: fadeInScale 0.3s ease;
}

.current-file-indicator i {
    font-size: 1rem;
    color: var(--text-muted);
}

.current-file-indicator span {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.current-file-indicator .file-badge {
    font-size: 0.7rem;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 2px 10px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    margin-left: auto;
    display: none;
}

/* ===== DOWNLOAD SECTION ===== */
.download-section {
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    flex-shrink: 0;
    animation: fadeInScale 0.5s ease;
}

.download-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-color);
}

.download-section-header h3 {
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
}

.download-files-list {
    padding: 8px 14px;
    max-height: 120px;
    overflow-y: auto;
}

.download-files-list::-webkit-scrollbar {
    width: 3px;
}
.download-files-list::-webkit-scrollbar-track {
    background: transparent;
}
.download-files-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.download-file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8rem;
}

.download-file-item:last-child {
    border-bottom: none;
}

.download-file-item .dfi-name {
    color: var(--text-primary);
    font-weight: 500;
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.download-file-item .dfi-size {
    color: var(--text-muted);
    font-size: 0.7rem;
    margin: 0 10px;
    white-space: nowrap;
}

.download-file-item .dfi-download-btn {
    background: var(--text-primary);
    color: var(--bg-primary);
    border: none;
    border-radius: 4px;
    padding: 2px 10px;
    font-size: 0.65rem;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.download-file-item .dfi-download-btn:hover {
    opacity: 0.85;
    transform: scale(1.05);
}

.download-file-item .dfi-download-btn i {
    font-size: 0.6rem;
}

/* ===== COMPRESS ===== */
.compress-panel {
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    flex-shrink: 0;
    animation: fadeInScale 0.5s ease;
}

.compress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 8px;
}

.compress-header h3 {
    font-size: 0.95rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
}

.compress-header-actions {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.compress-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.compress-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.compress-field label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.compress-quality {
    display: flex;
    align-items: center;
    gap: 12px;
}

.compress-quality input[type="range"] {
    flex: 1;
    -webkit-appearance: none;
    background: var(--border-color);
    height: 4px;
    border-radius: 2px;
    outline: none;
}

.compress-quality input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--text-primary);
    cursor: pointer;
}

.compress-quality input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--text-primary);
    cursor: pointer;
    border: none;
}

#compressQualityValue {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 45px;
    text-align: right;
}

.compress-quality-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.6rem;
    color: var(--text-muted);
    padding: 0 4px;
}

.compress-resize {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.compress-resize input[type="number"] {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 4px 8px;
    color: var(--text-primary);
    font-size: 0.8rem;
    width: 80px;
}

.compress-resize input[type="number"]:focus {
    outline: none;
    border-color: var(--text-primary);
}

.compress-resize span {
    color: var(--text-muted);
}

.compress-field select {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 6px 10px;
    color: var(--text-primary);
    font-size: 0.8rem;
    cursor: pointer;
}

.compress-field select:focus {
    outline: none;
    border-color: var(--text-primary);
}

.compress-info {
    background: var(--bg-primary);
    border-radius: 6px;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    margin-top: 4px;
}

.compress-stats {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.compress-savings {
    font-weight: 600;
}

/* ===== INFO CARD ===== */
.info-card {
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    gap: 12px;
    transition: all var(--transition-speed) ease;
    animation: slideIn 0.5s ease;
}

.info-card:hover {
    border-color: var(--text-muted);
}

.info-card i {
    font-size: 1.3rem;
    color: var(--text-muted);
    margin-top: 2px;
    flex-shrink: 0;
}

.info-card h4 {
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.info-card p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.info-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.info-card ul li {
    padding: 2px 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--footer-bg);
    border-top: 1px solid var(--border-color);
    padding: 10px 20px;
    flex-shrink: 0;
    height: 48px;
    display: flex;
    align-items: center;
}

.footer-content {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.footer-left {
    display: flex;
    align-items: center;
    gap: 6px;
}

.footer-text {
    font-weight: 400;
    color: var(--text-muted);
}

.footer-link-dark {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.footer-link-dark:hover {
    color: #6366f1;
}

.footer-brand {
    font-weight: 600;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-right {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.7rem;
    color: var(--text-muted);
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: 0.3s ease;
    cursor: pointer;
    font-size: 0.75rem;
}

.footer-link:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

.footer-divider {
    color: var(--border-color);
}

/* ===== POPUPS ===== */
.popup-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.85);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.popup-overlay.show {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.popup-content {
    background: var(--popup-bg);
    border-radius: 14px;
    max-width: 520px;
    width: 90%;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px var(--shadow-modal);
    border: 1px solid var(--border-color);
    animation: popupIn 0.4s ease;
}

.confirm-popup {
    max-width: 420px;
}

.popup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.popup-header h2 {
    font-size: 1.2rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
}

.popup-close {
    background: transparent;
    border: none;
    font-size: 1.6rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.popup-close:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
    transform: rotate(90deg);
}

.popup-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.popup-body p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
    text-align: center;
}

.popup-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    flex-shrink: 0;
}

.confirm-footer {
    display: flex;
    justify-content: center;
    gap: 10px;
}

/* Info Popup */
.info-section {
    margin-bottom: 18px;
}

.info-section:last-child {
    margin-bottom: 0;
}

.info-section h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.info-section p {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text-secondary);
    text-align: left;
}

.info-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.info-tag {
    background: var(--tag-bg);
    padding: 3px 10px;
    border-radius: 10px;
    font-size: 0.7rem;
    color: var(--tag-text);
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.info-formats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.format-group {
    background: var(--bg-primary);
    padding: 8px 12px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.format-group h4 {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 2px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.format-group span {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.info-section ul {
    list-style: none;
    padding: 0;
}

.info-section ul li {
    padding: 3px 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.info-section ul li i {
    color: var(--success-text);
    font-size: 0.8rem;
    flex-shrink: 0;
}

.info-section ol {
    padding-left: 18px;
}

.info-section ol li {
    padding: 3px 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.shortcut-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.shortcut-item {
    background: var(--bg-primary);
    padding: 6px 10px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.shortcut-key {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--tag-bg);
    padding: 2px 8px;
    border-radius: 4px;
    white-space: nowrap;
}

.shortcut-desc {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* ===== MODALS ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--modal-overlay);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--popup-bg);
    border-radius: 14px;
    max-width: 520px;
    width: 90%;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px var(--shadow-modal);
    border: 1px solid var(--border-color);
    animation: popupIn 0.4s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.modal-header h2 {
    font-size: 1.2rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 1.6rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
    transform: rotate(90deg);
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.modal-body h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-top: 14px;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.modal-body h3:first-child {
    margin-top: 0;
}

.modal-body p {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.modal-body ul {
    padding-left: 20px;
    margin-bottom: 10px;
}

.modal-body ul li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    padding: 2px 0;
}

.modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    flex-shrink: 0;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .sidebar { display: none; }
}

@media (max-width: 768px) {
    .main-content { padding: 10px; gap: 10px; }
    
    .nav-tab {
        padding: 5px 12px;
        font-size: 0.8rem;
    }
    .nav-tab span { display: none; }
    .nav-tab i { font-size: 1.1rem; }
    
    .toolbar {
        flex-direction: column;
        align-items: stretch;
        padding: 8px 12px;
    }
    .toolbar-left {
        flex-direction: column;
        align-items: stretch;
    }
    .toolbar-actions { flex-wrap: wrap; }
    
    .drop-zone { padding: 24px 16px; min-height: 140px; }
    .drop-content i { font-size: 2.8rem; }
    .drop-content h2 { font-size: 1.1rem; }
    
    .file-item { flex-wrap: wrap; padding: 6px 8px; }
    
    .info-formats { grid-template-columns: 1fr; }
    .shortcut-grid { grid-template-columns: 1fr; }
    .popup-content { max-height: 90vh; max-width: 95%; }
    
    .footer-content {
        flex-direction: column;
        gap: 4px;
        text-align: center;
    }
    .footer {
        height: auto;
        padding: 8px 16px;
    }

    .compress-header {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }
    .compress-header-actions .btn {
        flex: 1;
        justify-content: center;
    }
    .compress-resize {
        flex-wrap: wrap;
    }
    .compress-resize input[type="number"] {
        width: 60px;
    }
    .compress-stats {
        font-size: 0.7rem;
        gap: 6px;
    }

    .remove-header {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }
    .remove-header-actions .btn {
        flex: 1;
        justify-content: center;
    }
    .remove-stats {
        font-size: 0.7rem;
        gap: 8px;
    }
    
    .current-file-indicator {
        padding: 6px 10px;
        flex-wrap: wrap;
    }
    .current-file-indicator .file-badge {
        margin-left: 0;
        width: 100%;
        text-align: center;
    }

    .download-section-header {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }
    .download-section-header .btn {
        justify-content: center;
    }
    .download-file-item {
        flex-wrap: wrap;
        gap: 4px;
    }
    .download-file-item .dfi-size {
        margin: 0 5px;
    }
}

@media (max-width: 480px) {
    .header { padding: 0 12px; height: 52px; }
    .logo { font-size: 1rem; }
    .btn { padding: 4px 10px; font-size: 0.7rem; }
    .main-content { padding: 6px; gap: 6px; }
    
    .drop-zone { padding: 16px 12px; min-height: 100px; }
    .drop-content i { font-size: 2rem; }
    .drop-content h2 { font-size: 0.95rem; }
    .drop-content p { font-size: 0.8rem; }
    
    .popup-content {
        width: 95%;
        max-height: 95vh;
        border-radius: 10px;
    }
    .popup-header h2 { font-size: 0.95rem; }
    .popup-header { padding: 12px 16px; }
    .popup-body { padding: 14px; }
    
    .info-tag { font-size: 0.6rem; padding: 2px 8px; }
    .format-group span { font-size: 0.65rem; }
    
    .footer {
        padding: 6px 12px;
    }
    .footer-content {
        font-size: 0.7rem;
    }

    .compress-body {
        padding: 12px;
        gap: 10px;
    }
    .compress-resize input[type="number"] {
        width: 50px;
        font-size: 0.7rem;
    }
    .compress-stats {
        flex-direction: column;
        align-items: flex-start;
        gap: 2px;
    }
    
    .remove-body {
        padding: 12px;
    }
    .remove-stats {
        flex-direction: column;
        gap: 4px;
    }
    .current-file-indicator {
        font-size: 0.8rem;
        padding: 4px 8px;
    }
    .current-file-indicator span {
        font-size: 0.75rem;
    }

    .download-file-item .dfi-download-btn span {
        display: none;
    }
    .download-file-item .dfi-download-btn {
        padding: 2px 6px;
    }
}