/* ========= 顶栏颜色 ========= */
.navbar {
    background-color: #3D85C6 !important;
    transition: background-color .3s ease;
}

html[data-user-color-scheme="dark"] .navbar {
    background-color: #1f3144 !important;
}

/* ===== 上传框 ===== */
.upload-box {
    border: 2px dashed #cbd5e1;
    border-radius: 12px;
    padding: 40px;
    margin: 20px auto;
    max-width: 560px;
    color: #6b7280;
    cursor: pointer;
    position: relative;
    font-size: 15px;
    background: #fafafa;
    transition: .25s;
}

.upload-box:hover {
    background: #f3f4f6;
}

.upload-box input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

html[data-user-color-scheme="dark"] .upload-box {
    background: #0f172a;
    border-color: #334155;
    color: #94a3b8;
}

html[data-user-color-scheme="dark"] .upload-box:hover {
    background: #111827;
}

/* ===== 工具按钮 ===== */
button {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
    color: #1f2937;
    transition: all .25s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, .08);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

button:hover {
    background: linear-gradient(135deg, #e2e8f0, #cbd5e1);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, .12);
}

button:active {
    transform: scale(.96);
}

.download-btn {
    font-weight: bold;
    color: #fff;
    background: linear-gradient(135deg, #22c55e, #16a34a);
    box-shadow: 0 4px 12px rgba(34, 197, 94, .3);
}

.download-btn:hover {
    background: linear-gradient(135deg, #16a34a, #15803d);
}

html[data-user-color-scheme="dark"] button {
    background: linear-gradient(135deg, #334155, #1e293b);
    color: #f1f5f9;
    box-shadow: 0 2px 6px rgba(0, 0, 0, .5);
}

html[data-user-color-scheme="dark"] button:hover {
    background: linear-gradient(135deg, #475569, #334155);
}

html[data-user-color-scheme="dark"] button.download-btn {
    background: linear-gradient(135deg, #16a34a, #15803d);
    color: #eafff0;
    box-shadow: 0 4px 12px rgba(22, 163, 74, .5);
}

html[data-user-color-scheme="dark"] button.download-btn:hover {
    background: linear-gradient(135deg, #22c55e, #16a34a);
}

.tool-actions {
    margin: 20px auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
    align-items: center;
}

.tool-actions .row {
    display: flex;
    gap: 14px;
    justify-content: center;
}

/* ===== 水印卡片 ===== */
.wm-box {
    margin-top: 20px;
    text-align: center;
    border: 1px solid #e5e7eb;
    padding: 20px;
    border-radius: 14px;
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
    background: #fdfdfd;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .05);
}

html[data-user-color-scheme="dark"] .wm-box {
    background: #1e293b;
    border-color: #334155;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .6);
}

html[data-user-color-scheme="dark"] .wm-box h3 {
    color: #e2e8f0;
}

html[data-user-color-scheme="dark"] .wm-box p,
.wm-info,
.lbl {
    color: #cbd5e1;
}

html[data-user-color-scheme="dark"] .input {
    background: #0f172a;
    border-color: #334155;
    color: #f1f5f9;
}

.wm-title {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

.wm-emoji {
    font-size: 28px;
}

.wm-box h3 {
    margin: 0;
    color: #1f2937;
    letter-spacing: .5px;
}

.wm-box p {
    margin: 2px 0 0;
    color: #6b7280;
    font-size: 13px;
}

.wm-box .row {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 12px;
}

.wm-box .row.align {
    align-items: center;
}

.lbl {
    color: #374151;
    font-size: 14px;
    line-height: 40px;
}

.input {
    height: 40px;
    line-height: 40px;
    padding: 0 12px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    background: #fff;
    outline: none;
}

.input:focus {
    border-color: #93c5fd;
    box-shadow: 0 0 0 3px rgba(147, 197, 253, .35);
}

.input-n {
    width: 120px;
    text-align: center;
}

.input-color {
    width: 56px;
    padding: 0;
}

.wm-info {
    font-size: 12px;
    color: #6b7280;
    margin-top: 6px;
}

/* ===== 每个 PDF 的分组容器（含标题 + 删除按钮 + 可拖拽网格） ===== */
.pdf-group {
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 14px;
    margin-bottom: 24px;
    background: #fff;
    box-shadow: 0 2px 6px rgba(0, 0, 0, .05);
}

html[data-user-color-scheme="dark"] .pdf-group {
    background: #1e293b;
    border-color: #334155;
}

.pdf-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-weight: 700;
    color: #374151;
}

html[data-user-color-scheme="dark"] .pdf-header {
    color: #e5e7f0;
}

.del-file-btn {
    background: #ef4444;
    color: #fff;
    border: none;
    padding: 6px 10px;
    border-radius: 8px;
    cursor: pointer;
}

.del-file-btn:hover {
    filter: brightness(.95);
}

/* ===== 缩略图网格 ===== */
.preview-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

/* 缩略图卡片 */
.page-wrapper {
    position: relative;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    background: #fff;
    padding: 6px;
    cursor: move;
    transition: all .25s ease;
    box-shadow: 0 2px 6px rgba(0, 0, 0, .05);
}

.page-wrapper:hover {
    box-shadow: 0 6px 14px rgba(0, 0, 0, .12);
}

.page-wrapper.selected {
    border: 2px solid #3b82f6;
}

/* 统一缩略图宽度（高度自适应），看起来更“横平竖直” */
.page-wrapper canvas {
    display: block;
    width: 220px;
    height: auto;
}

.page-number {
    position: absolute;
    top: 6px;
    right: 8px;
    background: #3b82f6;
    color: #fff;
    font-size: 12px;
    padding: 2px 6px;
    border-radius: 6px;
    font-weight: bold;
    transition: .25s;
}

.page-wrapper.selected .page-number {
    background: #ef4444;
}

.drag-ghost {
    opacity: .6;
}


/* ===== 放大预览 Modal ===== */
#modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .7);
    justify-content: center;
    align-items: center;
    z-index: 3000;
}

#modalContent {
    background: #fff;
    border-radius: 12px;
    padding: 10px;
    max-width: 95vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

/* #closeBtn { position:absolute; top:-12px; right:-12px;
    background:#fff; border:2px solid #ef4444; color:#ef4444;
    border-radius:50%; width:32px; height:32px; cursor:pointer;
    font-size:18px; line-height:26px; font-weight:bold; box-shadow:0 2px 8px rgba(0,0,0,.4); }
  #closeBtn:hover { background:#ef4444; color:#fff; } */


.canvas-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 90vw;
    max-height: 90vh;
    overflow: auto;
    background: #333;
    padding: 10px;
    border-radius: 12px;
}

.canvas-wrapper canvas {
    display: block;
    max-width: 100%;
    height: auto;
}





#drawCanvas {
    position: absolute;
    top: 0;
    left: 0;
}

.toolbar {
    margin-top: 8px;
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

/* .zoom-icon { position:absolute; top:6px; right:6px; background:#3b82f6; color:#fff;
    border-radius:50%; width:24px; height:24px; text-align:center; line-height:24px;
    font-size:14px; cursor:pointer; } */