:root {
    --bg: #1a1a1a;
    --bg-elevated: #242424;
    --fg: #f5f5f0;
    --fg-muted: #888;
    --accent: #ff6b35;
    --accent-hover: #ff8c5a;
    --card: #2a2a2a;
    --border: #3a3a3a;
    --success: #4ade80;
    --warning: #fbbf24;
    --noise-opacity: 0.03;
}

[data-theme="light"] {
    --bg: #fafafa;
    --bg-elevated: #ffffff;
    --fg: #1a1a1a;
    --fg-muted: #666;
    --accent: #ff6b35;
    --accent-hover: #e55a2b;
    --card: #ffffff;
    --border: #e5e5e5;
    --success: #22c55e;
    --warning: #f59e0b;
    --noise-opacity: 0.02;
}

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

body {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--fg);
    min-height: 100vh;
    line-height: 1.5;
    overflow-x: hidden;
}

.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    opacity: var(--noise-opacity);
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 60px 40px;
}

.header {
    margin-bottom: 50px;
    padding-left: 20px;
    border-left: 4px solid var(--accent);
}

.header-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
}

.header-text {
    flex: 1;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.lang-selector {
    position: relative;
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 100;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.lang-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.lang-dropdown-item:hover {
    background: var(--bg);
}

.lang-dropdown-item.active {
    background: var(--accent);
    color: #fff;
}

.lang-dropdown-item .flag {
    font-size: 18px;
}

.lang-dropdown-item .name {
    font-size: 14px;
}

.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--card);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.theme-toggle .iconify {
    font-size: 20px;
    color: var(--fg);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.theme-toggle .sun-icon {
    display: none;
}

.theme-toggle .moon-icon {
    display: block;
}

[data-theme="light"] .theme-toggle .sun-icon {
    display: block;
}

[data-theme="light"] .theme-toggle .moon-icon {
    display: none;
}

.header h1 {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -2px;
    margin-bottom: 8px;
}

.header .accent {
    color: var(--accent);
}

.header .tagline {
    color: var(--fg-muted);
    font-size: 18px;
    font-weight: 400;
}

.upload-zone {
    margin-bottom: 40px;
}

.upload-inner {
    border: 2px dashed var(--border);
    border-radius: 16px;
    padding: 60px 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    background: var(--card);
    position: relative;
    overflow: hidden;
}

.upload-inner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,107,53,0.05) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.upload-inner:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.upload-inner:hover::before {
    opacity: 1;
}

.upload-inner.dragover {
    border-color: var(--accent);
    background: rgba(255,107,53,0.1);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 56px;
    color: var(--accent);
    margin-bottom: 16px;
    display: block;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.upload-inner:hover .upload-icon {
    transform: translateY(-8px) scale(1.1);
}

.upload-text {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
}

.upload-hint {
    color: var(--fg-muted);
    font-size: 14px;
}

.photos-section {
    margin-bottom: 40px;
    display: none;
}

.photos-section.show {
    display: block;
    animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--fg);
}

.section-header .count {
    font-size: 13px;
    color: var(--fg-muted);
    background: var(--card);
    padding: 4px 10px;
    border-radius: 20px;
}

.photos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 12px;
}

.photo-card {
    position: relative;
    aspect-ratio: 1;
    border-radius: 12px;
    overflow: hidden;
    background: var(--card);
    animation: popIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    cursor: grab;
}

.photo-card:active {
    cursor: grabbing;
}

.photo-card.dragging {
    opacity: 0.5;
    transform: scale(0.95);
}

.photo-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.photo-card:hover img {
    transform: scale(1.1);
}

.photo-card .photo-name {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 6px;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    font-size: 10px;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.photo-card .remove-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(0,0,0,0.6);
    border: none;
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.photo-card:hover .remove-btn {
    opacity: 1;
    transform: scale(1);
}

.photo-card .remove-btn:hover {
    background: var(--accent);
}

.settings-section {
    margin-bottom: 40px;
}

.settings-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 500px) {
    .settings-row {
        grid-template-columns: 1fr;
    }
}

.setting-item {
    background: var(--card);
    padding: 20px;
    border-radius: 12px;
}

.setting-item label {
    display: block;
    font-size: 12px;
    color: var(--fg-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.setting-item input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--fg);
    font-size: 16px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.setting-item input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(255,107,53,0.2);
}

.setting-item input::placeholder {
    color: var(--fg-muted);
}

.languages-section {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 24px;
    margin-bottom: 40px;
}

@media (max-width: 700px) {
    .languages-section {
        grid-template-columns: 1fr;
    }
}

.lang-column {
    background: var(--card);
    padding: 20px;
    border-radius: 16px;
}

.lang-column h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.lang-hint {
    font-size: 12px;
    color: var(--fg-muted);
    margin-bottom: 16px;
}

.lang-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    min-height: 80px;
    padding: 12px;
    background: var(--bg);
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.lang-list.dragover {
    border-color: var(--accent);
    background: rgba(255,107,53,0.05);
}

.lang-tag {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    user-select: none;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.lang-tag:hover {
    background: var(--accent);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.lang-tag.selected {
    background: var(--accent);
    border-color: var(--accent);
    cursor: grab;
}

.lang-tag.selected:active {
    cursor: grabbing;
}

.lang-tag.dragging {
    opacity: 0.5;
    transform: scale(0.95);
}

.preview-section {
    margin-bottom: 40px;
}

.preview-section h2 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.preview-list {
    background: var(--card);
    border-radius: 12px;
    padding: 16px;
    max-height: 280px;
    overflow-y: auto;
}

.preview-list::-webkit-scrollbar {
    width: 6px;
}

.preview-list::-webkit-scrollbar-track {
    background: transparent;
}

.preview-list::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.empty-state {
    color: var(--fg-muted);
    text-align: center;
    padding: 40px 20px;
    font-size: 14px;
}

.preview-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: var(--bg);
    border-radius: 8px;
    margin-bottom: 8px;
    font-size: 13px;
    animation: fadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.preview-item:last-child {
    margin-bottom: 0;
}

.preview-item .old-name {
    color: var(--fg-muted);
    flex-shrink: 0;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.preview-item .arrow {
    color: var(--accent);
    flex-shrink: 0;
}

.preview-item .new-name {
    color: var(--fg);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.warning {
    margin-top: 12px;
    padding: 12px 16px;
    background: rgba(251,191,36,0.1);
    border: 1px solid rgba(251,191,36,0.3);
    border-radius: 8px;
    color: var(--warning);
    font-size: 13px;
    display: none;
}

.warning.show {
    display: block;
    animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.action-section {
    text-align: right;
    padding-top: 20px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    background: var(--accent);
    border: none;
    border-radius: 12px;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.download-btn:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255,107,53,0.3);
}

.download-btn:active:not(:disabled) {
    transform: translateY(-1px);
}

.download-btn:disabled {
    background: var(--border);
    color: var(--fg-muted);
    cursor: not-allowed;
}

.download-btn .iconify {
    font-size: 20px;
}

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

@keyframes popIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.footer {
    text-align: center;
    padding: 40px 20px;
    margin-top: 40px;
    border-top: 1px solid var(--border);
}

.feedback-text {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--fg-muted);
}

.feedback-label {
    font-weight: 500;
}

.feedback-email {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent);
    text-decoration: none;
    padding: 6px 12px;
    background: var(--card);
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.feedback-email:hover {
    background: var(--accent);
    color: #fff;
    transform: translateY(-2px);
}

.feedback-email .iconify {
    font-size: 16px;
}