/* ============================================================
   在线图片处理工具 - 样式
   ============================================================ */

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #a5b4fc;
    --primary-bg: #eef2ff;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
    --transition: all 0.25s ease;
}

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

/* 去除所有状态下的下划线 */
a,
a:link,
a:visited,
a:hover,
a:active {
text-decoration: none;
}

/* 去除点击时的外部虚线框 */
a {
outline: none;
}

/* 设置链接颜色为黑色，去除默认的蓝色 */
a {
color: #000;
}

/* 使链接继承父元素的文本颜色 */
a {
color: inherit;
}


body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, #f0f4ff 0%, #fdf2f8 100%);
    min-height: 100vh;
    color: var(--gray-800);
    line-height: 1.6;
}

/* 页面头部 */
.app-header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
    padding: 16px 24px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header .header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.app-header .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
}

.app-header .logo svg {
    width: 32px;
    height: 32px;
}

/* 主容器 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px 24px 60px;
}

/* 工具导航标签 */
.tool-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius);
    padding: 8px;
    box-shadow: var(--shadow);
}

.tool-tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--gray-600);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tool-tab:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.tool-tab.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 12px rgba(99, 102, 241, 0.35);
}

.tool-tab .tab-icon {
    font-size: 18px;
}

/* 主面板 */
.main-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

@media (max-width: 1024px) {
    .main-panel {
        grid-template-columns: 1fr;
    }
}

/* 卡片 */
.card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-100);
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-body {
    padding: 20px;
}

/* 上传拖拽区域 */
.upload-zone {
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius);
    padding: 48px 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--gray-50);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.upload-zone .upload-icon {
    font-size: 48px;
    margin-bottom: 12px;
    color: var(--gray-400);
}

.upload-zone:hover .upload-icon {
    color: var(--primary);
}

.upload-zone .upload-text {
    font-size: 16px;
    color: var(--gray-600);
    margin-bottom: 4px;
}

.upload-zone .upload-hint {
    font-size: 13px;
    color: var(--gray-400);
}

.upload-zone.has-image {
    padding: 12px;
    border-style: solid;
    border-color: var(--success);
}

.upload-zone.has-image .upload-icon {
    display: none;
}

.upload-zone.has-image .upload-text,
.upload-zone.has-image .upload-hint {
    display: none;
}

.upload-zone .preview-thumb {
    max-width: 100%;
    max-height: 320px;
    border-radius: var(--radius-sm);
    object-fit: contain;
    display: block;
}

/* 预览图包装器 — 用于裁剪叠加层定位 */
.preview-wrapper {
    position: relative;
    display: inline-block;
    width: 100%;
}

.preview-wrapper .preview-thumb {
    max-height: 360px;
}

/* 裁剪叠加层 */
.crop-overlay {
    position: absolute;
    inset: 0;
    display: none;
    cursor: crosshair;
    z-index: 5;
    touch-action: none;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
}

.crop-overlay.active {
    display: block;
}

.crop-overlay canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    touch-action: none;
}

.crop-hint {
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.65);
    color: #fff;
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 4px;
    white-space: nowrap;
    pointer-events: none;
}

/* 控制区域 */
.controls {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-700);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
}

input[type="text"],
input[type="number"],
input[type="file"],
select {
    padding: 9px 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: var(--transition);
    background: #fff;
    color: var(--gray-800);
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

input[type="range"] {
    width: 100%;
    accent-color: var(--primary);
}

input[type="color"] {
    width: 44px;
    height: 36px;
    padding: 2px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.range-with-value {
    display: flex;
    align-items: center;
    gap: 12px;
}

.range-with-value input[type="range"] {
    flex: 1;
}

.range-with-value .range-value {
    min-width: 36px;
    text-align: center;
    font-weight: 600;
    font-size: 14px;
    color: var(--primary);
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

.btn-success {
    background: var(--success);
    color: #fff;
}

.btn-success:hover {
    background: #16a34a;
    box-shadow: 0 4px 16px rgba(34, 197, 94, 0.4);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-600);
}

.btn-outline:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

.btn-block {
    width: 100%;
}

.btn-lg {
    padding: 12px 32px;
    font-size: 16px;
}

/* 结果区域 */
.result-area {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.result-image-container {
    background: repeating-conic-gradient(var(--gray-200) 0% 25%, transparent 0% 50%) 50% / 20px 20px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    max-height: 420px;
}

.result-image-container img {
    max-width: 100%;
    max-height: 420px;
    object-fit: contain;
}

.result-placeholder {
    color: var(--gray-400);
    font-size: 14px;
    text-align: center;
    padding: 40px 20px;
}

.result-placeholder .placeholder-icon {
    font-size: 40px;
    margin-bottom: 8px;
    opacity: 0.4;
}

.result-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 8px;
}

.result-info .info-item {
    background: var(--gray-50);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    text-align: center;
}

.result-info .info-item .info-label {
    font-size: 11px;
    color: var(--gray-500);
    text-transform: uppercase;
}

.result-info .info-item .info-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-800);
    margin-top: 2px;
}

.result-info .info-item .info-value.saved {
    color: var(--success);
}

/* 结果操作按钮组 */
.result-actions {
    display: flex;
    gap: 12px;
}

.result-actions .btn {
    flex: 1;
}

/* 加载动画 */
.loading-overlay {
    display: none;
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.85);
    border-radius: var(--radius);
    align-items: center;
    justify-content: center;
    z-index: 10;
}

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

.spinner {
    width: 44px;
    height: 44px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Toast 通知 */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s ease;
    max-width: 360px;
}

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

.toast.toast-success {
    background: var(--success);
}

.toast.toast-info {
    background: var(--primary);
}

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

/* 文件大小显示 */
.file-size {
    font-size: 13px;
    color: var(--gray-500);
    margin-top: 4px;
}

/* 颜色选择器行 */
.color-picker-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.color-picker-row input[type="color"] {
    flex-shrink: 0;
}

.color-picker-row .color-hex {
    font-size: 13px;
    color: var(--gray-500);
    font-family: monospace;
}

/* 选项卡内嵌 */
.sub-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    padding: 3px;
}

.sub-tab {
    flex: 1;
    padding: 7px 12px;
    border: none;
    border-radius: 6px;
    background: transparent;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-600);
    transition: var(--transition);
}

.sub-tab.active {
    background: #fff;
    color: var(--primary);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

/* 内边距补丁 */
.p-0 { padding: 0 !important; }

/* 水印位置网格 */
.position-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
}

.position-btn {
    padding: 8px 4px;
    border: 1px solid var(--gray-200);
    border-radius: 4px;
    background: #fff;
    cursor: pointer;
    font-size: 12px;
    color: var(--gray-600);
    transition: var(--transition);
    text-align: center;
}

.position-btn:hover {
    border-color: var(--primary-light);
    background: var(--primary-bg);
}

.position-btn.active {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
}

/* 页脚 */
.app-footer {
    text-align: center;
    padding: 24px;
    color: var(--gray-400);
    font-size: 13px;
}

/* 响应式调整 */
@media (max-width: 640px) {
    .container {
        padding: 12px;
    }

    .tool-tabs {
        gap: 4px;
        padding: 4px;
    }

    .tool-tab {
        font-size: 12px;
        padding: 8px 10px;
    }

    .form-row,
    .form-row-3 {
        grid-template-columns: 1fr;
    }

    .result-actions {
        flex-direction: column;
    }
}