/* ============================================================
   webooks · Kevin 的书房
   视觉基因与《Vibe Coding》阅读版同源：
   色板 #0C2864 / #2064AE / #08A6F6，paper / night 双主题。
   ============================================================ */
*,*::before,*::after{box-sizing:border-box}
:root{--sw-topbar:60px}
html[data-theme="paper"]{
  --bg:#F4F7FB; --paper:#FFFFFF; --panel:#F7FAFD;
  --ink:#1F2937; --ink-soft:#475569; --head:#0C2864; --head2:#2064AE;
  --muted:#7B8CA0; --line:#E3EBF4; --accent:#08A6F6;
  --shadow:0 1px 2px rgba(12,40,100,.05),0 10px 28px rgba(12,40,100,.08);
  --spine1:#0C2864; --spine2:#2064AE; --spine3:#08A6F6; --spine4:#B5D4F4; --spine5:#0C447C; --spine6:#3FB6F5;
}
html[data-theme="night"]{
  --bg:#0C1119; --paper:#131B26; --panel:#18222F;
  --ink:#D8E1EC; --ink-soft:#AAB8C8; --head:#9CC2EE; --head2:#7FB2E8;
  --muted:#8494A8; --line:#26323F; --accent:#3FB6F5;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 28px rgba(0,0,0,.35);
  --spine1:#2064AE; --spine2:#3FB6F5; --spine3:#7FB2E8; --spine4:#0C447C; --spine5:#08A6F6; --spine6:#B5D4F4;
}
body{
  margin:0;background:var(--bg);color:var(--ink);
  /* 字体策略（2026-09-22 定）：OFL 开源字体优先（思源黑体，免费商用可嵌入），
     缺失时回落系统字体；不再显式点名 Microsoft YaHei —— 其著作权归方正，
     商业发布需单独授权（"双重授权"陷阱），详见 deploy/typography.md。 */
  font-family:"Source Han Sans CN","思源黑体 CN",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB",sans-serif;
  line-height:1.75;letter-spacing:.012em;text-rendering:optimizeLegibility;
}
a{color:var(--head2);text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
.wrap.narrow{max-width:460px}
.muted{color:var(--muted)}

/* ---------------- 顶栏 ---------------- */
#topbar{position:sticky;top:0;z-index:50;background:var(--paper);border-bottom:1px solid var(--line)}
.tb-inner{max-width:1080px;margin:0 auto;padding:0 24px;height:var(--sw-topbar);display:flex;align-items:center;gap:14px}
.tb-home{font-weight:700;font-size:17px;color:var(--head);letter-spacing:.02em}
.tb-home:hover{color:var(--head2)}
.tb-nav{display:flex;align-items:center;min-width:0}
.crumb{color:var(--muted);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tb-theme{margin-left:auto;display:flex;align-items:center;gap:7px;cursor:pointer;
  font:inherit;font-size:12.5px;color:var(--ink-soft);background:var(--panel);
  border:1px solid var(--line);border-radius:999px;padding:5px 13px;transition:.2s}
.tb-theme:hover{border-color:var(--head2);color:var(--head2)}
.theme-dot{width:9px;height:9px;border-radius:50%;background:var(--accent)}
html[data-theme="night"] .theme-dot{background:#7FB2E8}

/* ---------------- Hero ---------------- */
#hero{padding:64px 0 44px}
.hero-grid{display:flex;align-items:flex-end;gap:48px}
.hero-text{flex:1;min-width:0}
#hero h1{margin:0 0 16px;font-size:40px;line-height:1.3;color:var(--head);letter-spacing:.02em}
.hero-sub{margin:0 0 22px;max-width:560px;color:var(--ink-soft);font-size:15.5px}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{display:inline-block;padding:2px 11px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.04em}
.chip-blue{background:var(--head2);color:#fff}
.chip-red{background:#DF203C;color:#fff}
.chip-gray{background:var(--panel);color:var(--muted);border:1px solid var(--line)}
.chip-ghost{border:1px solid var(--line);color:var(--ink-soft);background:transparent}

/* 书脊装饰：一排竖立的书 */
.hero-deco{flex:none;display:flex;flex-direction:column;align-items:center;padding-bottom:6px}
.shelf{display:flex;align-items:flex-end;gap:7px;height:120px}
.spine{width:17px;border-radius:4px 4px 2px 2px;display:inline-block}
.spine.s1{height:104px;background:var(--spine1)}
.spine.s2{height:88px;background:var(--spine2)}
.spine.s3{height:112px;background:var(--spine3)}
.spine.s4{height:80px;background:var(--spine4)}
.spine.s5{height:96px;background:var(--spine5)}
.spine.s6{height:72px;background:var(--spine6)}
.spine.leaned{height:98px;background:var(--spine2);transform:rotate(9deg);transform-origin:bottom left;margin-left:4px}
.shelf-board{width:150px;height:5px;border-radius:3px;background:var(--head);opacity:.85;margin-top:2px}

/* ---------------- 区块标题 ---------------- */
.sec-head{display:flex;align-items:baseline;gap:14px;margin:44px 0 20px;border-bottom:1px solid var(--line);padding-bottom:10px}
.sec-head h2{margin:0;font-size:21px;color:var(--head);letter-spacing:.03em}
.sec-head.in-panel{margin-top:0;border-bottom:none;padding-bottom:6px}
.sec-meta{font-size:12.5px;color:var(--muted)}

/* ---------------- 书架卡片 ---------------- */
.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(430px,1fr));gap:22px}
.book-card{background:var(--paper);border:1px solid var(--line);border-radius:16px;
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease}
.book-card:hover{transform:translateY(-6px);border-color:var(--head2);box-shadow:var(--shadow)}
.card-link{display:flex;gap:20px;padding:20px;color:inherit;height:100%}
.cover-wrap{position:relative;flex:none;width:138px}
.cover{width:138px;aspect-ratio:720/1018;object-fit:cover;border-radius:8px;
  border:1px solid var(--line);display:block;user-select:none;
  transition:transform .3s ease}
.book-card:hover .cover{transform:perspective(640px) rotateY(-9deg) translateY(-3px)}
/* 只有"真实封面 + 未上架"才灰化；占位书封保持设计色（它本身已表达"待上架"） */
.is-preview .cover:not(.cover-ph){filter:grayscale(.55) opacity(.82)}
/* 占位书封：没有 cover.png 的书（如「整理中」）也不出裂图 */
.cover-ph{
  display:flex;flex-direction:column;gap:7px;
  aspect-ratio:720/1018;padding:18px 16px;border-radius:8px;
  background:linear-gradient(160deg,#0C2864 0%,#2064AE 64%,#08A6F6 145%);
  color:#fff;border:1px solid rgba(255,255,255,.14);
}
.cover-ph .cp-kicker{font-size:10.5px;letter-spacing:.22em;color:rgba(255,255,255,.72)}
.cover-ph .cp-title{font-size:17px;font-weight:700;line-height:1.45;letter-spacing:.02em;margin-top:auto}
.cover-ph .cp-sub{font-size:11px;line-height:1.6;color:rgba(255,255,255,.78)}
.cover-ph-lg{padding:26px 24px;gap:10px}
.cover-ph-lg .cp-title{font-size:23px}
.cover-ph-lg .cp-sub{font-size:12.5px}
.ribbon{position:absolute;top:9px;left:-7px;background:var(--muted);color:#fff;
  font-size:11px;font-weight:600;letter-spacing:.1em;padding:2px 10px;border-radius:0 6px 6px 0}
.card-body{flex:1;min-width:0;display:flex;flex-direction:column}
.card-title{margin:2px 0 4px;font-size:17.5px;line-height:1.4;color:var(--head);font-weight:700}
.card-sub{margin:0 0 8px;font-size:13px;color:var(--head2)}
.card-meta{margin:0 0 10px;font-size:12.5px;color:var(--muted)}
.card-stats{margin:0 0 10px;font-size:12px;color:var(--muted)}
.card-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.card-actions{margin-top:auto;display:flex;gap:10px;flex-wrap:wrap}

/* ---------------- 按钮 ---------------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:7px 16px;border-radius:9px;font-size:13px;font-weight:600;cursor:pointer;
  border:1px solid transparent;transition:.2s}
.btn-primary{background:var(--head2);color:#fff}
.btn-primary:hover{background:var(--accent);color:#fff}
.btn-ghost{border-color:var(--head2);color:var(--head2);background:transparent}
.btn-ghost:hover{background:var(--panel)}
.btn-disabled{border:1px dashed var(--line);color:var(--muted);background:transparent;cursor:default}
.btn-lg{padding:10px 22px;font-size:14.5px;border-radius:11px}
.btn-sm{padding:3px 11px;font-size:12px}

/* ---------------- 时间线 ---------------- */
.timeline{list-style:none;margin:0;padding:6px 0 8px}
.timeline li{position:relative;display:flex;align-items:baseline;gap:16px;padding:7px 0 7px 26px}
.tl-dot{position:absolute;left:5px;top:16px;width:9px;height:9px;border-radius:50%;
  background:var(--paper);border:2.5px solid var(--head2)}
.timeline li:not(:last-child)::before{content:"";position:absolute;left:9px;top:30px;bottom:-6px;width:1px;background:var(--line)}
.tl-date{flex:none;font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums}
.tl-text{font-size:14px;color:var(--ink-soft)}

/* ---------------- 详情页 ---------------- */
.detail-head{display:flex;gap:36px;margin-top:40px;
  background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:30px}
.detail-cover img,.detail-cover .cover-ph{width:190px;display:block;border-radius:10px;aspect-ratio:720/1018}
.detail-cover img{object-fit:cover;border:1px solid var(--line)}
.detail-info{flex:1;min-width:0}
.detail-tags{display:flex;gap:9px;margin-bottom:12px}
.detail-title{margin:0 0 6px;font-size:27px;line-height:1.35;color:var(--head);font-weight:700}
.detail-sub{margin:0 0 14px;font-size:15.5px;color:var(--head2)}
.detail-abstract{margin:0 0 18px;font-size:14px;color:var(--ink-soft);max-width:560px}
.detail-meta{display:grid;grid-template-columns:1fr 1fr;gap:9px 28px;margin:0 0 22px}
.detail-meta div{display:flex;gap:10px;font-size:13.5px}
.detail-meta dt{flex:none;color:var(--muted);min-width:3.2em}
.detail-meta dd{margin:0;color:var(--ink)}
.detail-actions{display:flex;gap:12px;flex-wrap:wrap}

.panel{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:24px 28px;margin:26px 0 44px}
.panel-title{margin:0 0 8px;font-size:19px;color:var(--head)}
.toc-list{list-style:none;margin:6px 0 0;padding:0}
.toc-list li{display:flex;align-items:baseline;gap:18px;padding:9px 2px;border-bottom:1px dashed var(--line)}
.toc-list li:last-child{border-bottom:none}
.toc-part{font-size:14.5px;font-weight:600;color:var(--head)}
.toc-chaps{font-size:13px;color:var(--muted)}

/* ---------------- 后台 ---------------- */
.login-panel{margin-top:64px;padding:30px 34px}
.login-hint{margin:0 0 18px;font-size:13.5px;color:var(--muted)}
.login-error{margin:0 0 12px;font-size:13.5px;color:#DF203C}
.login-form{display:flex;flex-direction:column;gap:12px}
.login-form input{padding:10px 14px;border:1px solid var(--line);border-radius:9px;
  font:inherit;background:var(--panel);color:var(--ink)}
.login-form input:focus{outline:2px solid var(--accent);outline-offset:-1px}
.flash-ok{margin:24px 0 0;padding:11px 16px;border-radius:10px;font-size:13.5px;
  background:var(--panel);border:1px solid var(--line);color:var(--head2)}
.admin-table{width:100%;border-collapse:collapse;font-size:13.5px}
.admin-table th{text-align:left;padding:9px 10px;color:var(--muted);font-weight:600;border-bottom:1px solid var(--line);white-space:nowrap}
.admin-table td{padding:11px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.admin-table tr:last-child td{border-bottom:none}
.admin-table code{font-size:11.5px;color:var(--muted)}
.file-cell a{margin-right:10px;font-size:12.5px}
.pub-form label{display:flex;flex-direction:column;gap:5px;font-size:12.5px;color:var(--muted);margin-bottom:14px}
.pub-form input,.pub-form select,.pub-form textarea{
  padding:8px 12px;border:1px solid var(--line);border-radius:8px;
  font:inherit;font-size:13.5px;background:var(--panel);color:var(--ink)}
.pub-form input:focus,.pub-form textarea:focus,.pub-form select:focus{outline:2px solid var(--accent);outline-offset:-1px}
.pub-form textarea{resize:vertical}
.form-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0 16px}
.form-grid.files{grid-template-columns:repeat(2,1fr)}
.pub-form .btn-lg{margin-top:6px}

/* ---------------- 页脚 ---------------- */
#footer{border-top:1px solid var(--line);margin-top:26px;padding:26px 0 34px}
.foot-inner{max-width:1080px;margin:0 auto;padding:0 24px;text-align:center;
  font-size:12.5px;color:var(--muted);display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.foot-sep{opacity:.6}

/* ---------------- 响应式 ---------------- */
@media (max-width:900px){
  .book-grid{grid-template-columns:1fr}
  .hero-grid{flex-direction:column;align-items:flex-start;gap:30px}
  #hero h1{font-size:31px}
  .detail-head{flex-direction:column;gap:22px}
  .detail-cover img,.detail-cover .cover-ph{width:150px}
  .form-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:560px){
  .card-link{flex-direction:column}
  .cover-wrap{width:150px}
  .cover{width:150px}
  .detail-meta{grid-template-columns:1fr}
  .form-grid,.form-grid.files{grid-template-columns:1fr}
}