:root {
    --bg: #f7f4ef;
    --ink: #1f2937;
    --muted: #6b7280;
    --card: #fff;
    --accent: #8b4513;
    --accent-dark: #6d3610;
    --border: #e5e7eb;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Noto Serif SC", Georgia, serif;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.6;
}
a { color: var(--accent); }
.container { max-width: 960px; margin: 0 auto; padding: 1.5rem; }
.topbar {
    display: flex; flex-wrap: wrap; align-items: center; gap: 1rem;
    padding: 1rem 1.5rem; background: #fff; border-bottom: 1px solid var(--border);
}
.brand a { font-weight: 700; color: var(--ink); text-decoration: none; font-size: 1.2rem; }
.nav { display: flex; gap: .75rem; flex-wrap: wrap; }
.nav-link { text-decoration: none; color: var(--muted); padding: .35rem .6rem; border-radius: .4rem; }
.nav-link.active, .nav-link:hover { color: var(--accent); background: #faf5ef; }
.user-meta { margin-left: auto; color: var(--muted); font-size: .95rem; }
.hero { text-align: center; padding: 4rem 1.5rem 2rem; }
.hero h1 { font-size: 2.4rem; margin-bottom: .5rem; }
.hero-actions { display: flex; gap: 1rem; justify-content: center; margin-top: 1.5rem; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; padding-bottom: 3rem; }
.card, .panel, .auth-box { background: var(--card); border: 1px solid var(--border); border-radius: .8rem; padding: 1.25rem; box-shadow: 0 1px 2px rgba(0,0,0,.04); }
.auth-box { max-width: 420px; margin: 3rem auto; }
.form label, .field { display: block; margin-bottom: 1rem; }
.input, .textarea, select.input { width: 100%; padding: .65rem .75rem; border: 1px solid var(--border); border-radius: .5rem; font: inherit; background: #fff; }
.textarea { min-height: 120px; resize: vertical; }
.btn { display: inline-block; padding: .6rem 1rem; border-radius: .5rem; border: 1px solid var(--border); background: #fff; color: var(--ink); text-decoration: none; cursor: pointer; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-dark); }
.alert { padding: .75rem 1rem; border-radius: .5rem; margin-bottom: 1rem; }
.alert.success { background: #ecfdf5; color: #065f46; }
.alert.error { background: #fef2f2; color: #991b1b; }
.muted { color: var(--muted); }
.hint { color: var(--muted); font-size: .92rem; }
.section-title { margin-top: 1.5rem; }
.style-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin: 1rem 0; }
.style-block { background: #fafafa; padding: .75rem; border-radius: .5rem; border: 1px solid var(--border); }
.style-block-title { font-weight: 600; margin: 0 0 .5rem; }
.field-label { display: block; font-size: .85rem; color: var(--muted); margin: .4rem 0 .2rem; }
.image-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: .75rem; margin: .75rem 0; }
.image-item { border: 1px solid var(--border); border-radius: .5rem; overflow: hidden; background: #fff; }
.image-item img { width: 100%; height: 100px; object-fit: cover; display: block; }
.image-item span { display: block; padding: .35rem .5rem; font-size: .85rem; }
.upload-row { margin-top: .5rem; }
.upload-status { font-size: .9rem; color: var(--muted); margin-top: .35rem; }
.quick-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin-top: 1rem; }
.card-link { display: block; padding: 1rem; background: #faf5ef; border-radius: .6rem; text-decoration: none; color: var(--ink); font-weight: 600; text-align: center; }
.poem-list { display: grid; gap: 1rem; }
.poem-item { border: 1px solid var(--border); border-radius: .6rem; padding: 1rem; background: #fff; }
.row-between { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.row-actions { display: flex; gap: 1rem; margin-top: .5rem; }
.review-box { background: #faf5ef; padding: 1rem; border-radius: .5rem; margin: 1rem 0; }
.preview-block { margin-top: 1rem; }
.cover-preview { background: #fff; padding: 1.5rem; border: 1px dashed var(--border); text-align: center; }
.preview-img, .image-row img { max-width: 180px; max-height: 140px; object-fit: cover; border-radius: .4rem; margin: .25rem; }
.public-book section { margin-bottom: 2.5rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
.book-poem .ai-review { margin-top: 1rem; padding: 1rem; background: #faf5ef; border-left: 4px solid var(--accent); }
.checkbox { display: flex; align-items: center; gap: .5rem; margin: .75rem 0; }
#save-btn.loading { opacity: .7; pointer-events: none; }

/* 分享面板 · 仿微信链接卡片 */
.share-panel { margin-top: 1rem; }
.share-wechat-card {
    display: flex; gap: 0; max-width: 420px;
    border: 1px solid #e7e7e7; border-radius: 8px; overflow: hidden;
    background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,.06);
}
.share-card-thumb { width: 88px; min-height: 88px; flex-shrink: 0; background: #f3f3f3; }
.share-card-thumb img { width: 100%; height: 100%; min-height: 88px; object-fit: cover; display: block; }
.share-card-body { padding: 10px 12px; flex: 1; min-width: 0; }
.share-card-title {
    font-size: 15px; font-weight: 600; color: #111;
    margin: 0 0 4px; line-height: 1.35;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.share-card-desc {
    font-size: 12px; color: #888; margin: 0 0 6px; line-height: 1.4;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.share-card-site { font-size: 11px; color: #b2b2b2; margin: 0; }
.share-actions {
    display: flex; flex-wrap: wrap; gap: 1.5rem; align-items: flex-start; margin-top: 1.25rem;
}
.share-qr { text-align: center; }
.share-qr img { border: 1px solid var(--border); border-radius: 8px; padding: 6px; background: #fff; }
.share-copy { flex: 1; min-width: 220px; }
.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: .75rem; }
.copy-toast { color: #065f46; font-size: .92rem; margin-top: .5rem; }
.copy-toast[hidden] { display: none; }

/* 页面导航 */
.page-nav {
    display: flex; flex-wrap: wrap; gap: .5rem; align-items: center;
    padding: .65rem 1rem; background: #fff; border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 100;
}
#book-top { scroll-margin-top: 4rem; }
.nav-btn { font-size: .92rem; padding: .45rem .85rem; }

/* 图片画布：任意位置 / 大小 / 亮度 */
.placed-stage, .placed-canvas, .editor-canvas {
    position: relative;
    min-height: 280px;
    overflow: hidden;
}
.placed-stage { background: #fff; border-radius: .5rem; padding: 1rem; }
.placed-canvas { min-height: 240px; }
.placed-img, .editor-image {
    position: absolute;
    object-fit: cover;
    border-radius: .35rem;
    box-shadow: 0 2px 8px rgba(0,0,0,.12);
}
.editor-canvas {
    background: repeating-linear-gradient(45deg, #fafafa, #fafafa 10px, #f0f0f0 10px, #f0f0f0 20px);
    border: 2px dashed var(--border);
    border-radius: .6rem;
    margin: .75rem 0;
    touch-action: none;
}
.editor-image {
    cursor: grab;
    border: 2px solid transparent;
    overflow: hidden;
    user-select: none;
}
.editor-image.selected { border-color: var(--accent); z-index: 5; }
.editor-image img { width: 100%; height: 100%; object-fit: cover; pointer-events: none; display: block; }
.resize-handle {
    position: absolute; right: 0; bottom: 0; width: 16px; height: 16px;
    background: var(--accent); cursor: nwse-resize; border-radius: 2px 0 .3rem 0;
}
.editor-controls {
    background: #fafafa; border: 1px solid var(--border); border-radius: .5rem;
    padding: .75rem 1rem; margin-bottom: .75rem;
}
.editor-controls[hidden] { display: none; }
.pwa-hint, .pwa-tip { margin-top: .75rem; }
.pwa-hint { background: #faf5ef; }

/* 印刷导出 */
.export-panel .subscription-box {
    margin: 1rem 0; padding: 1rem; border-radius: .6rem; border: 1px solid var(--border);
}
.export-panel .subscription-box.active { background: #ecfdf5; border-color: #a7f3d0; }
.export-panel .subscription-box.inactive { background: #fffbeb; border-color: #fde68a; }
.sub-status.ok { color: #065f46; margin: 0; }
.sub-status.warn { color: #92400e; margin: 0 0 .75rem; }
.preset-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: .75rem; margin: .75rem 0 1.25rem; }
.preset-card { cursor: pointer; }
.preset-card input { position: absolute; opacity: 0; pointer-events: none; }
.preset-inner {
    display: block; padding: 1rem; border: 2px solid var(--border); border-radius: .6rem;
    background: #fff; min-height: 100%;
}
.preset-card input:checked + .preset-inner { border-color: var(--accent); background: #faf5ef; }
.preset-inner strong { display: block; margin-bottom: .35rem; }
.preset-tag { display: inline-block; margin-top: .5rem; font-size: .8rem; color: var(--accent); background: #fff; padding: .15rem .45rem; border-radius: .25rem; }
.format-row { display: flex; flex-wrap: wrap; gap: 1.5rem; margin: .75rem 0 1rem; }
.format-option { display: flex; align-items: center; gap: .4rem; cursor: pointer; }
.export-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; margin-top: 1rem; }
.export-status { color: var(--muted); font-size: .95rem; }
.export-notes, .lineart-tool-list { margin: .5rem 0; padding-left: 1.25rem; color: var(--muted); }
.export-notes li, .lineart-tool-list li { margin: .35rem 0; }
.warn-text { color: #b45309; }

/* 线稿工具 */
.lineart-panel {
    margin-top: 1rem; padding: .75rem; background: #fafafa; border: 1px dashed var(--border); border-radius: .5rem;
}
.lineart-modes { display: flex; flex-wrap: wrap; gap: .5rem; margin: .5rem 0; }
.lineart-btn.external { border-color: #93c5fd; color: #1d4ed8; }
.lineart-status { font-size: .9rem; color: var(--muted); margin-top: .35rem; min-height: 1.2em; }
.tool-hint[hidden] { display: none; }
#export-btn.loading, .pay-btn:disabled { opacity: .7; pointer-events: none; }