/* 文件：/static/app.css */

:root{
  --bg:#F5F6FA;
  --card:rgba(255,255,255,0.86);
  --cardSolid:#FFFFFF;
  --text:#0B1220;
  --muted:#6B7280;
  --line:rgba(15,23,42,0.08);
  --brand:#10B981;
  --shadow:0 10px 30px rgba(15,23,42,0.08);
  --shadow2:0 6px 18px rgba(15,23,42,0.10);
  --radius:18px;
  --radius2:26px;
  --navH:66px;

  --ease-spring:cubic-bezier(0.16, 1, 0.24, 1);
  --ease-spring2:cubic-bezier(0.12, 1, 0.24, 1);
  --ease-soft:cubic-bezier(0.22, 0.95, 0.26, 1);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  color:var(--text);
  background:
    radial-gradient(900px 500px at 10% 0%, rgba(16,185,129,0.10), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(59,130,246,0.10), transparent 55%),
    var(--bg);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }

.container{
  width:min(1060px, calc(100% - 28px));
  margin:0 auto;
  padding:16px 0 calc(var(--navH) + 26px);
}

.topbar{
  position:sticky;
  top:0;
  z-index:20;
  padding:12px 0 10px;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}

.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  letter-spacing:0.2px;
  transition:transform 220ms var(--ease-spring), opacity 220ms var(--ease-soft);
}
.brand:active{ transform:scale(0.985); opacity:0.96; }

.brand-badge{
  width:34px;
  height:34px;
  border-radius:12px;
  background:linear-gradient(135deg, rgba(16,185,129,0.95), rgba(59,130,246,0.85));
  box-shadow:0 10px 20px rgba(16,185,129,0.18);
  transition:transform 340ms var(--ease-spring2);
}
.brand:hover .brand-badge{ transform:rotate(-2deg) scale(1.03); }

.tabs{
  display:flex;
  gap:6px;
  padding:6px;
  background:rgba(255,255,255,0.65);
  border:1px solid rgba(255,255,255,0.75);
  border-radius:999px;
  box-shadow:var(--shadow);
}

.tab{
  position:relative;
  padding:9px 12px;
  border-radius:999px;
  color:var(--muted);
  font-size:14px;
  cursor:pointer;
  user-select:none;
  transition:transform 280ms var(--ease-spring), color 240ms var(--ease-soft), background 240ms var(--ease-soft);
}
.tab:hover{ transform:translateY(-1px) scale(1.01); }
.tab:active{ transform:translateY(0) scale(0.985); }

.tab.on{
  color:var(--text);
  font-weight:800;
  background:rgba(255,255,255,0.55);
}
.tab.on::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:6px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg, rgba(16,185,129,0.95), rgba(59,130,246,0.75));
  opacity:0.90;
  transform-origin:center;
  animation:underlinePop 420ms var(--ease-spring2) both;
}
@keyframes underlinePop{
  0%{ transform:scaleX(0.4); opacity:0.35; }
  100%{ transform:scaleX(1); opacity:0.90; }
}

/* ✅ 仅首页：置顶分类条更像 iOS（左对齐 + 横向滚动） */
.home-topbar{ z-index:50; }
.home-topbar .topbar-inner{ justify-content:flex-start; gap:12px; }
.home-topbar .tabs{
  flex:1;
  justify-content:flex-start;
  overflow-x:auto;
  overflow-y:hidden;
  white-space:nowrap;
  -webkit-overflow-scrolling:touch;
  scroll-snap-type:x mandatory;
  background:rgba(255,255,255,0.72);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}
.home-topbar .tabs::-webkit-scrollbar{ height:0; }
.home-topbar .tabs{ scrollbar-width:none; }
.home-topbar .tab{ flex:0 0 auto; scroll-snap-align:start; }
.home-topbar .brand{ margin-left:auto; flex:0 0 auto; }
@media (max-width:420px){
  .home-topbar .brand-badge{ width:30px; height:30px; border-radius:11px; }
  .home-topbar .brand{ gap:8px; }
}

.card{
  background:var(--card);
  border:1px solid rgba(255,255,255,0.70);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transform:translateZ(0);
}

.list{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-top:12px;
}

/* ✅ 列表无刷新切换动效（软Q） */
.list-ready{ animation:listIn 360ms var(--ease-spring2) both; }
.list-switching{
  opacity:0.55;
  transform:translateY(6px);
  transition:opacity 180ms var(--ease-soft), transform 180ms var(--ease-soft);
}
@keyframes listIn{
  0%{ opacity:0.0; transform:translateY(10px) scale(0.995); }
  100%{ opacity:1; transform:translateY(0) scale(1); }
}

.post{
  display:flex;
  gap:14px;
  padding:14px;
  align-items:stretch;
  cursor:pointer;
  transition:transform 340ms var(--ease-spring), box-shadow 340ms var(--ease-soft), background 340ms var(--ease-soft);
  will-change:transform;
}
.post:hover{
  transform:translateY(-2px) scale(1.006);
  box-shadow:0 16px 36px rgba(15,23,42,0.12);
  background:rgba(255,255,255,0.92);
}
.post:active{
  transform:translateY(0) scale(0.992);
  box-shadow:0 10px 26px rgba(15,23,42,0.10);
}

.post-left{
  flex:1;
  min-width:0;
  display:flex;
  flex-direction:column;
  gap:8px;
}
.post-title{
  font-weight:900;
  font-size:16px;
  line-height:1.25;
  letter-spacing:0.1px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-excerpt{
  color:var(--muted);
  font-size:13px;
  line-height:1.45;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-meta{
  margin-top:auto;
  display:flex;
  gap:10px;
  align-items:center;
  color:rgba(107,114,128,0.92);
  font-size:12px;
}
.pill{
  display:inline-flex;
  align-items:center;
  padding:4px 10px;
  border-radius:999px;
  background:rgba(16,185,129,0.10);
  color:rgba(16,185,129,0.95);
  border:1px solid rgba(16,185,129,0.18);
  font-weight:800;
  transition:transform 280ms var(--ease-spring);
}
.post:hover .pill{ transform:translateY(-1px); }

.post-cover{
  width:92px;
  flex:0 0 92px;
  border-radius:16px;
  overflow:hidden;
  border:1px solid rgba(15,23,42,0.08);
  box-shadow:0 10px 22px rgba(15,23,42,0.08);
  transition:transform 340ms var(--ease-spring2);
}
.post:hover .post-cover{ transform:rotate(0.4deg) scale(1.02); }

/* ✅ 空态卡 */
.empty-card{ padding:16px; }
.empty-title{ font-weight:900; }
.empty-sub{ color:rgba(107,114,128,0.92); font-size:13px; margin-top:6px; }

/* ✅ 骨架屏 */
.sk-post{
  padding:14px;
  display:flex;
  gap:14px;
  align-items:stretch;
  position:relative;
  overflow:hidden;
}
.sk-left{ flex:1; min-width:0; display:flex; flex-direction:column; gap:10px; padding-top:4px; }
.sk-line{
  height:12px;
  border-radius:10px;
  background:rgba(15,23,42,0.06);
  position:relative;
  overflow:hidden;
}
.sk-w95{ width:95%; }
.sk-w85{ width:85%; }
.sk-w70{ width:70%; }
.sk-w45{ width:45%; }

.sk-cover{
  width:92px;
  flex:0 0 92px;
  border-radius:16px;
  background:rgba(15,23,42,0.06);
  border:1px solid rgba(15,23,42,0.06);
  overflow:hidden;
  position:relative;
}
.sk-line::after, .sk-cover::after{
  content:"";
  position:absolute;
  top:-40%;
  left:-40%;
  width:60%;
  height:180%;
  transform:rotate(18deg);
  background:linear-gradient(90deg, rgba(255,255,255,0), rgba(255,255,255,0.45), rgba(255,255,255,0));
  animation:shimmer 1200ms var(--ease-soft) infinite;
  opacity:0.80;
}
@keyframes shimmer{
  0%{ transform:translateX(-10%) rotate(18deg); }
  100%{ transform:translateX(240%) rotate(18deg); }
}

.footer-note{
  color:rgba(107,114,128,0.90);
  font-size:12px;
  text-align:center;
  margin-top:12px;
}

/* ✅ iOS26-ish 底部胶囊导航 */
.float-nav-wrap{
  position:fixed;
  left:0;
  right:0;
  bottom:16px;
  z-index:999;
  pointer-events:none;
}
.float-nav{
  width:min(520px, calc(100% - 28px));
  margin:0 auto;
  height:var(--navH);
  border-radius:999px;
  background:rgba(255,255,255,0.72);
  border:1px solid rgba(255,255,255,0.80);
  box-shadow:0 22px 46px rgba(15,23,42,0.18);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  display:flex;
  align-items:center;
  justify-content:space-around;
  gap:10px;
  padding:8px;
  pointer-events:auto;
  position:relative;
  overflow:hidden;
  transform:translateZ(0);
}
.float-nav .glow{
  --pos:0;
  position:absolute;
  top:8px;
  bottom:8px;
  left:8px;
  width:calc(50% - 8px);
  border-radius:999px;
  background:linear-gradient(90deg, rgba(16,185,129,0.24), rgba(59,130,246,0.22));
  transform:translate3d(calc(var(--pos) * 100%), 0, 0);
  transition:transform 640ms var(--ease-spring2), filter 640ms var(--ease-soft), opacity 420ms var(--ease-soft);
  box-shadow:0 18px 30px rgba(16,185,129,0.18), 0 12px 28px rgba(59,130,246,0.10);
  will-change:transform, filter;
}
.float-nav.moving .glow{ filter:saturate(1.15); }
.float-nav.pressing .glow{
  filter:saturate(1.20);
  transform:translate3d(calc(var(--pos) * 100%), 0, 0) scale(0.985, 0.96);
  transition:transform 180ms var(--ease-soft), filter 180ms var(--ease-soft);
}
.float-nav a{
  flex:1;
  height:100%;
  border-radius:999px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  position:relative;
  z-index:2;
  color:rgba(15,23,42,0.72);
  font-weight:900;
  letter-spacing:0.2px;
  transition:transform 340ms var(--ease-spring), color 240ms var(--ease-soft), opacity 240ms var(--ease-soft);
  user-select:none;
}
.float-nav a.on{
  color:rgba(15,23,42,0.92);
  transform:translateY(-1px);
}
.float-nav a:active{ transform:translateY(0) scale(0.985); }
.float-nav .dot{
  width:7px;
  height:7px;
  border-radius:99px;
  background:linear-gradient(90deg, rgba(16,185,129,0.95), rgba(59,130,246,0.78));
  box-shadow:0 10px 16px rgba(16,185,129,0.24);
  transform:translateZ(0);
  transition:transform 340ms var(--ease-spring2);
}
.float-nav a.on .dot{ transform:scale(1.18); }

/* ✅ ink ripple */
[data-ripple]{ position:relative; overflow:hidden; }
.ink{
  position:absolute;
  border-radius:999px;
  transform:translate(-50%, -50%) scale(0.25);
  background:radial-gradient(circle at 30% 30%, rgba(255,255,255,0.55), rgba(255,255,255,0.12) 45%, rgba(255,255,255,0) 70%);
  opacity:0;
  pointer-events:none;
  animation:ink 620ms var(--ease-spring2) both;
  filter:blur(0.2px);
}
@keyframes ink{
  0%{ opacity:0; transform:translate(-50%,-50%) scale(0.25); }
  20%{ opacity:0.85; }
  100%{ opacity:0; transform:translate(-50%,-50%) scale(1.85); }
}

@media (prefers-reduced-motion: reduce){
  *{ animation:none !important; transition:none !important; scroll-behavior:auto !important; }
}