/* ===== pages-v3.css — 棋库 / 复盘 / 登录 三页统一到「鲸鱼娘 · 深海蓝」设计语言 (v2.44.4) ===== */
:root{
  --pg-brand:#4d6bfe;
  --pg-brand-2:#3a55e8;
  --pg-aqua:#35c9e6;
  --pg-ink:#10243d;
  --pg-ink-2:#3c5c82;
  --pg-mute:#7d96b4;
  --pg-line:rgba(77,107,254,.12);
  --pg-r:20px;
  --pg-shadow:0 10px 26px rgba(31,63,120,.08);
}
body{
  background:
    radial-gradient(900px 420px at 12% -8%, rgba(53,201,230,.20), transparent 62%),
    radial-gradient(760px 380px at 92% 4%, rgba(77,107,254,.16), transparent 60%),
    linear-gradient(180deg,#f2f7fe 0%,#e9f1fb 46%,#eaf2fc 100%);
  color:var(--pg-ink);
  -webkit-font-smoothing:antialiased;
}
.rv-app{max-width:1040px;margin:0 auto;padding:0 12px 28px}

/* 顶部栏 */
.rv-top{
  position:sticky;top:0;z-index:20;
  display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;
  margin:0 -12px 14px;padding:10px 14px;
  background:rgba(255,255,255,.78);
  -webkit-backdrop-filter:blur(16px) saturate(1.2);backdrop-filter:blur(16px) saturate(1.2);
  border-bottom:1px solid var(--pg-line);
}
.rv-brand{display:flex;align-items:center;gap:9px;min-width:0}
.rv-brand::before{
  content:"";width:28px;height:28px;flex:0 0 28px;border-radius:50%;
  background:url(../assets/mascot/whale-girl.png) center/cover no-repeat,#e8efff;
  box-shadow:0 3px 9px rgba(31,63,120,.16);
}
.rv-brand h1{font-size:16.5px;font-weight:800;letter-spacing:-.2px;margin:0;line-height:1.2}
.rv-brand .sub{font-size:11.5px;color:var(--pg-mute);letter-spacing:.01em}
.rv-brand .back{
  order:-1;font-size:12.5px;font-weight:600;color:var(--pg-brand);text-decoration:none;
  padding:6px 10px;border-radius:10px;background:rgba(77,107,254,.08);
}
.rv-brand .back:active{transform:scale(.97)}

/* 卡片 */
.card{
  background:linear-gradient(180deg,#ffffff,#fbfdff);
  border:1px solid var(--pg-line);
  border-radius:var(--pg-r);
  box-shadow:var(--pg-shadow);
  padding:15px 14px;
  margin:0 0 13px;
}
.card h2{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  margin:0 0 12px;font-size:15px;font-weight:800;letter-spacing:-.2px;color:var(--pg-ink);
}
.card h2::before{
  content:"";width:4px;height:15px;border-radius:2px;
  background:linear-gradient(180deg,var(--pg-brand),var(--pg-aqua));
}
.tag{
  font-size:11px;font-weight:700;padding:2.5px 8px;border-radius:999px;
  background:rgba(77,107,254,.10);color:var(--pg-brand-2);
}
.tag.off{background:rgba(125,150,180,.14);color:var(--pg-mute)}

/* 分段 tab */
.lib-tabs{display:flex;gap:5px;padding:4px;border-radius:13px;background:rgba(77,107,254,.07);margin:0 0 10px}
.lib-tab{
  flex:1 1 0;border:0;background:transparent;border-radius:9px;padding:8px 10px;
  font-size:12.5px;font-weight:700;color:var(--pg-ink-2);transition:background .18s ease,color .18s ease,box-shadow .18s ease;
}
.lib-tab.on{background:#fff;color:var(--pg-brand-2);box-shadow:0 3px 10px rgba(31,63,120,.10)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:0;border-radius:11px;padding:9px 14px;font-size:13px;font-weight:700;
  color:#fff;background:linear-gradient(135deg,#5b76ff,var(--pg-brand-2));
  box-shadow:0 7px 16px rgba(63,92,240,.24);
  transition:transform .14s ease,box-shadow .18s ease,background .18s ease;
}
.btn:active{transform:translateY(1px) scale(.99);box-shadow:0 4px 10px rgba(63,92,240,.20)}
.btn.ghost{
  background:#fff;color:var(--pg-brand-2);
  border:1px solid rgba(77,107,254,.20);box-shadow:0 3px 10px rgba(31,63,120,.06);
}
.btn.ghost:active{background:#f4f8ff}

/* 行与输入 */
.row{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:9px 0}
.row.center{justify-content:center}
.search,input[type="text"],select,textarea{
  font:inherit;font-size:13px;color:var(--pg-ink);
  background:#f6f9ff;border:1px solid rgba(77,107,254,.14);border-radius:11px;
  padding:9px 11px;outline:none;transition:border-color .16s ease,box-shadow .16s ease,background .16s ease;
}
.search{flex:1 1 190px;min-width:0}
.search:focus,input:focus,select:focus,textarea:focus{
  background:#fff;border-color:rgba(77,107,254,.45);box-shadow:0 0 0 3px rgba(77,107,254,.13);
}
textarea{width:100%;min-height:74px;resize:vertical;line-height:1.6;font-family:inherit}
.check{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:var(--pg-ink-2);font-weight:600}
.check input{accent-color:var(--pg-brand)}

/* 列表 */
.lib-list{display:grid;gap:8px;margin-top:10px}
.lib-list>*{
  background:#fff;border:1px solid rgba(77,107,254,.10);border-radius:13px;
  padding:11px 12px;transition:transform .16s ease,box-shadow .18s ease,border-color .16s ease;
}
.lib-list>*:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(31,63,120,.09);border-color:rgba(77,107,254,.22)}
.empty{
  display:flex;align-items:center;justify-content:center;
  min-height:82px;border:1.5px dashed rgba(77,107,254,.22);border-radius:14px;
  background:rgba(246,249,255,.7);color:var(--pg-mute);font-size:12.5px;
}
.msg{font-size:12px;color:var(--pg-mute)}
.bk-stats{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px;border:0;background:none}
.bk-stats>*, .bk-stats span, .bk-stats div{border:0!important;background:none!important;box-shadow:none!important;font-size:12.5px;color:var(--pg-ink-2)}
.teach-cat{padding:8px 10px}

@media (max-width:760px){
  .rv-top{margin:0 -12px 12px;padding:9px 12px}
  .rv-brand h1{font-size:15.5px}
  .card{padding:13px 12px;border-radius:18px}
  .btn{padding:9px 13px;font-size:12.5px}
  .lib-tab{font-size:12px;padding:7px 8px}
}

/* 溢出修正：老样式里有百分比宽度导致窄屏横向溢出 */
*,*::before,*::after{box-sizing:border-box}
.card{overflow:hidden}
.lib-tabs{flex-wrap:nowrap;overflow:hidden}
.lib-tab{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.row{min-width:0}
.row>*{min-width:0;max-width:100%}
.search{max-width:100%}
@media (max-width:760px){
  .lib-tab{padding:8px 4px;font-size:12px}
  .row .btn{flex:1 1 auto}
}
/* 登录页：窄栏 + 与其它页一致的返回胶囊；顺手清掉卡片上的重影伪元素 */
.wrap{max-width:520px;margin:0 auto;padding:0 12px 30px}
.wrap .back{
  display:inline-block;margin:12px 0 4px;font-size:12.5px;font-weight:600;
  color:var(--pg-brand);text-decoration:none;padding:6px 10px;border-radius:10px;background:rgba(77,107,254,.08);
}
.wrap h1{font-size:22px;font-weight:800;letter-spacing:-.3px;margin:8px 0 4px;text-align:center}
.wrap .sub{text-align:center;font-size:12.5px;color:var(--pg-mute);margin-bottom:14px}
.wrap label{display:block;font-size:12.5px;font-weight:700;color:var(--pg-ink-2);margin:12px 0 6px}
.wrap input{width:100%}
.wrap button{width:100%;margin-top:14px;border:0;border-radius:12px;padding:12px;
  font-size:14.5px;font-weight:800;color:#fff;background:linear-gradient(135deg,#5b76ff,var(--pg-brand-2));
  box-shadow:0 10px 22px rgba(63,92,240,.26)}
.wrap button.ghost{background:#fff;color:var(--pg-brand-2);border:1px solid rgba(77,107,254,.22);box-shadow:0 3px 10px rgba(31,63,120,.06)}
.wrap .switch{margin-top:14px;text-align:center;font-size:13px;font-weight:600;color:var(--pg-brand-2);cursor:pointer}
.wrap .msg{font-size:12px;color:var(--pg-mute);text-align:center;margin-top:8px;min-height:16px}
.card::after,.wrap .card::before{content:none!important;display:none!important}