/* ==================== 图片工具箱 ==================== */

/* --- Hero 区域 --- */
.it-hero {
    position: relative;
    min-height: 56vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding: calc(var(--navbar-height) + var(--space-lg)) var(--space-sm) var(--space-lg);
    background: var(--bg-dark);
}

.it-hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.it-gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
    animation: itOrbFloat 8s ease-in-out infinite;
}

.it-gradient-orb.orb-1 {
    width: 420px;
    height: 420px;
    background: var(--primary);
    top: -120px;
    right: -100px;
    animation-delay: 0s;
}

.it-gradient-orb.orb-2 {
    width: 320px;
    height: 320px;
    background: var(--secondary);
    bottom: -90px;
    left: -80px;
    animation-delay: -3s;
}

.it-gradient-orb.orb-3 {
    width: 260px;
    height: 260px;
    background: var(--accent);
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -6s;
    opacity: 0.1;
}

@keyframes itOrbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.it-hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
}

.it-hero-title {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.it-hero-title .title-line {
    color: var(--text-primary);
    opacity: 0.9;
}

.it-hero-title .title-accent {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.it-hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    font-weight: 500;
}

.it-hero-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    opacity: 0.85;
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.8;
}

/* --- 主界面 --- */
.it-main {
    padding: var(--space-lg) 0 var(--space-xl);
}

.it-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-lg);
    align-items: start;
}

.it-upload-section,
.it-settings-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
}

.it-upload-section .section-title,
.it-settings-section .section-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border);
}

/* --- 上传区域 --- */
.it-dropzone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-xl) var(--space-md);
    border: 2px dashed var(--border);
    border-radius: var(--radius-md);
    text-align: center;
    cursor: pointer;
    transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
    outline: none;
}

.it-dropzone:hover,
.it-dropzone:focus-visible,
.it-dropzone.is-dragover {
    border-color: var(--primary);
    background: rgba(79, 142, 247, 0.06);
}

.it-dropzone.is-dragover {
    transform: scale(1.01);
}

.it-dropzone-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(79, 142, 247, 0.12);
    color: var(--primary);
    margin-bottom: var(--space-xs);
}

.it-dropzone-icon svg {
    width: 28px;
    height: 28px;
}

.it-dropzone-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.it-dropzone-hint {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin: 0;
}

/* --- 文件列表 --- */
.it-file-list {
    margin-top: var(--space-md);
}

.it-file-list-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-sm);
}

.it-file-count {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.it-clear-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.82rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: color 0.2s ease, background 0.2s ease;
}

.it-clear-btn:hover {
    color: #f56c6c;
    background: rgba(245, 108, 108, 0.1);
}

.it-clear-btn svg {
    width: 14px;
    height: 14px;
}

.it-file-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    max-height: 420px;
    overflow-y: auto;
    padding-right: 4px;
}

.it-file-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.it-file-item:hover {
    border-color: rgba(79, 142, 247, 0.5);
}

.it-file-item.selected {
    border-color: var(--primary);
    background: rgba(79, 142, 247, 0.08);
}

.it-file-thumb {
    width: 52px;
    height: 52px;
    flex-shrink: 0;
    border-radius: var(--radius-sm);
    object-fit: cover;
    background: repeating-conic-gradient(rgba(255,255,255,0.08) 0% 25%, transparent 0% 50%) 0 0 / 12px 12px;
}

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

.it-file-name {
    font-size: 0.85rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.it-file-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
}

.it-file-meta .it-size-down {
    color: #67c23a;
}

.it-file-meta .it-size-up {
    color: #f56c6c;
}

.it-file-status {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 999px;
    background: rgba(79, 142, 247, 0.15);
    color: var(--primary);
    flex-shrink: 0;
}

.it-file-status.done {
    background: rgba(103, 194, 58, 0.15);
    color: #67c23a;
}

.it-file-status.error {
    background: rgba(245, 108, 108, 0.15);
    color: #f56c6c;
}

.it-file-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.it-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border: none;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
}

.it-icon-btn:hover {
    background: rgba(79, 142, 247, 0.15);
    color: var(--primary);
}

.it-icon-btn.remove:hover {
    background: rgba(245, 108, 108, 0.15);
    color: #f56c6c;
}

.it-icon-btn svg {
    width: 15px;
    height: 15px;
}

.it-convert-btn {
    width: 100%;
    margin-top: var(--space-md);
    justify-content: center;
}

.it-convert-btn[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
}

/* --- 实时预览 --- */
.it-preview {
    margin-bottom: var(--space-md);
}

.it-preview-canvas-wrap {
    position: relative;
    min-height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: repeating-conic-gradient(rgba(255, 255, 255, 0.05) 0% 25%, transparent 0% 50%) 0 0 / 20px 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.it-preview-img {
    display: block;
    max-width: 100%;
    max-height: 280px;
    width: auto;
    height: auto;
}

.it-preview-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-lg) var(--space-md);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.82rem;
    line-height: 1.7;
}

.it-preview-empty svg {
    width: 32px;
    height: 32px;
    opacity: 0.5;
}

.it-preview-empty p {
    margin: 0;
}

.it-preview-meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-top: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
}

.it-preview-dims {
    color: var(--text-primary);
}

.it-preview-size {
    color: var(--primary);
    font-weight: 500;
}

/* --- 设置区域 --- */
.it-settings {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.it-setting-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.it-setting-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.it-quality-value {
    color: var(--primary);
    font-variant-numeric: tabular-nums;
}

/* 格式选择 */
.it-format-tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xs);
}

.it-format-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: var(--space-xs) 4px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.it-format-tab b {
    font-size: 0.95rem;
    color: var(--text-primary);
}

.it-format-tab i {
    font-style: normal;
    font-size: 0.7rem;
    color: var(--text-secondary);
}

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

.it-format-tab.active {
    border-color: var(--primary);
    background: rgba(79, 142, 247, 0.12);
}

.it-format-tab.active b {
    color: var(--primary);
}

.it-webp-warning {
    font-size: 0.78rem;
    color: #e6a23c;
    margin: 0;
}

/* 质量滑块 */
.it-range {
    width: 100%;
    accent-color: var(--primary);
    cursor: pointer;
}

.it-range-marks {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--text-secondary);
}

/* 尺寸模式 */
.it-resize-modes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xs);
}

.it-resize-mode {
    padding: 8px 4px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.it-resize-mode:hover {
    border-color: var(--primary);
    color: var(--text-primary);
}

.it-resize-mode.active {
    border-color: var(--primary);
    background: rgba(79, 142, 247, 0.12);
    color: var(--primary);
}

.it-resize-panel {
    padding-top: var(--space-xs);
}

.it-scale-chips {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.it-chip {
    padding: 6px 14px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 999px;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.it-chip:hover {
    border-color: var(--primary);
    color: var(--text-primary);
}

.it-chip.active {
    border-color: var(--primary);
    background: rgba(79, 142, 247, 0.12);
    color: var(--primary);
}

.it-custom-size {
    display: flex;
    align-items: flex-end;
    gap: var(--space-xs);
}

.it-size-field {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.it-size-field label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.it-size-field input {
    width: 100%;
    padding: 8px 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s ease;
}

.it-size-field input:focus {
    border-color: var(--primary);
}

.it-lock-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    margin-bottom: 1px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    cursor: pointer;
    transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.it-lock-btn svg {
    width: 16px;
    height: 16px;
}

.it-lock-btn.active {
    border-color: var(--primary);
    background: rgba(79, 142, 247, 0.12);
    color: var(--primary);
}

.it-size-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin: var(--space-xs) 0 0;
    line-height: 1.6;
}

/* 结果栏 */
.it-result-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(103, 194, 58, 0.08);
    border: 1px solid rgba(103, 194, 58, 0.25);
    border-radius: var(--radius-md);
}

.it-result-summary {
    font-size: 0.82rem;
    color: #67c23a;
    min-width: 0;
}

.it-note {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

.it-note svg {
    width: 15px;
    height: 15px;
    flex-shrink: 0;
    margin-top: 2px;
}

/* --- 使用步骤 --- */
.it-steps-section {
    padding-top: 0;
}

.it-steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.it-step-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    text-align: center;
    transition: transform 0.25s ease, border-color 0.25s ease;
}

.it-step-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.it-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
}

.it-step-card h3 {
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.it-step-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

/* --- FAQ --- */
.it-faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.it-faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
}

.it-faq-item h3 {
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.it-faq-item p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 0;
}

/* --- 响应式 --- */
@media (max-width: 992px) {
    .it-layout {
        grid-template-columns: 1fr;
    }

    .it-steps-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .it-format-tabs,
    .it-resize-modes {
        grid-template-columns: repeat(3, 1fr);
    }

    .it-custom-size {
        flex-wrap: wrap;
    }

    .it-lock-btn {
        order: 3;
    }
}