:root{
  --primary:#4f46e5;
  --primary-light:#eef2ff;
  --primary-dark:#3730a3;
  --danger:#dc2626;
  --danger-bg:#fee2e2;
  --success:#16a34a;
  --warn:#d97706;
  --text:#1f2937;
  --text-2:#4b5563;
  --text-3:#6b7280;
  --glass:rgba(255,255,255,0.78);
  --glass-border:rgba(255,255,255,0.55);
  --glass-strong:rgba(255,255,255,0.92);
  --radius:22px;
  --shadow:0 8px 32px rgba(0,0,0,0.12);
  --shadow-hover:0 14px 44px rgba(0,0,0,0.18);
  --bg-pos:50%;
  --bg-scale:1;
  --bright:1.06;
  --veil:0.30;
}
*::before,*::after,*{margin:0;padding:0;box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
html,body{height:100%;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,sans-serif;
  font-size:15px;color:var(--text);line-height:1.55;
  overflow-x:hidden;
  padding-bottom:calc(72px + env(safe-area-inset-bottom));
}
button{font-family:inherit;cursor:pointer;border:none;background:none;font-size:14px;color:inherit;}
input,select,textarea{
  font-family:inherit;font-size:16px;color:var(--text);border:1px solid var(--glass-border);
  border-radius:12px;padding:11px 13px;background:rgba(255,255,255,0.85);outline:none;backdrop-filter:blur(6px);
}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(79,70,229,.14);background:#fff;}
textarea{resize:vertical;min-height:90px;}

/* ===== 视频背景 ===== */
.bg-wrap{position:fixed;inset:0;z-index:0;overflow:hidden;background:#101828;}
.bg-video{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  object-position:center var(--bg-pos);
  filter:brightness(var(--bright)) saturate(1.15) contrast(1.05);
  transform:scale(var(--bg-scale));transform-origin:center center;
}
.bg-veil{
  position:fixed;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(180deg,
    rgba(255,255,255,calc(var(--veil) * 0.10)) 0%,
    rgba(255,255,255,calc(var(--veil) * 0.45)) 40%,
    rgba(255,255,255,calc(var(--veil) * 0.80)) 75%,
    rgba(255,255,255,var(--veil)) 100%);
}
.bg-veil::after{
  content:'';position:absolute;inset:0;
  background:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,.18) 0%, transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(255,235,200,.14) 0%, transparent 45%);
  animation:aurora 22s ease-in-out infinite alternate;
}
#particleCanvas{position:fixed;inset:0;z-index:2;pointer-events:none;}
@keyframes aurora{
  0%{opacity:.6;transform:translateX(0) scale(1);}
  100%{opacity:1;transform:translateX(-4%) scale(1.08);}
}

/* ===== 顶部栏 ===== */
.topbar{
  position:sticky;top:0;z-index:100;display:flex;align-items:center;gap:12px;
  padding:12px 18px;background:rgba(0,0,0,0.18);backdrop-filter:blur(16px) saturate(1.2);
  border-bottom:1px solid rgba(255,255,255,0.12);
}
.brand{color:#fff;font-size:20px;font-weight:800;letter-spacing:.5px;white-space:nowrap;}
.brand small{display:block;font-size:11px;font-weight:500;opacity:.8;line-height:1.2;}
.tabs-top{display:none;align-items:center;gap:4px;flex:1;justify-content:center;}
.tabs-top button{
  color:rgba(255,255,255,.82);padding:8px 14px;border-radius:10px;font-size:14px;font-weight:500;
  transition:all .15s;position:relative;
}
.tabs-top button.active{color:#fff;background:rgba(255,255,255,.16);}
.tabs-top button.active::after{
  content:'';position:absolute;bottom:4px;left:18%;right:18%;height:2px;background:#fff;border-radius:2px;
}
.top-actions{display:flex;align-items:center;gap:8px;margin-left:auto;}
.icon-h{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;color:#fff;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);border-radius:10px;
  padding:8px 12px;font-size:13px;min-height:38px;transition:background .15s;
}
.icon-h:hover{background:rgba(255,255,255,.24);}
.icon-h svg{width:15px;height:15px;}
.sync-status{
  display:inline-flex;align-items:center;gap:6px;color:rgba(255,255,255,.85);font-size:12px;
  padding:6px 10px;border-radius:8px;background:rgba(255,255,255,.1);white-space:nowrap;min-height:30px;
}
.sync-dot{width:8px;height:8px;border-radius:50%;display:inline-block;box-shadow:0 0 6px currentColor;}
.search-box{
  position:relative;display:flex;align-items:center;
}
.search-box input{
  width:160px;padding-left:34px;background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.25);color:#fff;
  transition:width .2s,background .2s;
}
.search-box input::placeholder{color:rgba(255,255,255,.65);}
.search-box input:focus{width:220px;background:rgba(255,255,255,.92);color:var(--text);}
.search-box input:focus::placeholder{color:var(--text-3);}
.search-box svg{position:absolute;left:11px;width:15px;height:15px;color:rgba(255,255,255,.7);pointer-events:none;}
.search-box input:focus+svg{color:var(--text-3);}
.search-clear{
  position:absolute;right:8px;color:rgba(255,255,255,.7);width:22px;height:22px;display:flex;align-items:center;justify-content:center;border-radius:50%;
}
.search-clear:hover{background:rgba(255,255,255,.18);color:#fff;}
#search-input{display:none;}

/* ===== 主内容 ===== */
.shell{position:relative;z-index:10;max-width:1600px;margin:0 auto;padding:58px 16px 60px;width:100%;}
.view{display:none;animation:fadeIn .35s ease both;}
.view.active{display:block;}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:translateY(0);}}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:18px;align-items:start;}
@media(min-width:1200px){.col-2{grid-column:span 2;}.col-3{grid-column:span 3;}}

.card{
  background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);backdrop-filter:blur(18px) saturate(1.1);
  transition:transform .22s ease,box-shadow .22s ease,opacity .2s;
  animation:cardIn .45s ease both;
}
.card:nth-child(1){animation-delay:.03s;}
.card:nth-child(2){animation-delay:.06s;}
.card:nth-child(3){animation-delay:.09s;}
.card:nth-child(4){animation-delay:.12s;}
@keyframes cardIn{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:translateY(0);}}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);}
.card.collapsed .card-body{max-height:0;opacity:0;overflow:hidden;padding-top:0;}
.card.collapsed .chevron{transform:rotate(180deg);}
.card-head{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.card-title{flex:1;font-size:16px;font-weight:700;display:flex;align-items:center;gap:8px;}
.card-title svg{width:18px;height:18px;color:var(--primary);}
.chevron{
  width:28px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:8px;
  color:var(--text-3);transition:all .2s;cursor:pointer;
}
.chevron:hover{background:rgba(0,0,0,.05);color:var(--text);}
.chevron svg{width:14px;height:14px;}
.card-body{transition:all .25s ease;}

.badge{display:inline-block;font-size:11px;padding:3px 9px;border-radius:20px;font-weight:700;}
.b-high{background:var(--danger-bg);color:var(--danger);}
.b-mid{background:#fff7ed;color:#c2410c;}
.b-low{background:#eff6ff;color:#2563eb;}
.b-cat{background:rgba(0,0,0,.06);color:var(--text-2);}
.b-done{background:#dcfce7;color:#15803d;}
.b-overdue{background:#fee2e2;color:#b91c1c;}

.empty{color:var(--text-3);font-size:13px;text-align:center;padding:24px 0;}
.muted{color:var(--text-3);font-size:12px;}

/* ===== 任务条目 ===== */
.item{
  display:flex;align-items:flex-start;gap:10px;padding:12px;border:1px solid var(--glass-border);
  border-radius:14px;margin-bottom:9px;background:rgba(255,255,255,.62);transition:all .15s;
  cursor:grab;
}
.item:active{cursor:grabbing;}
.item:hover{background:rgba(255,255,255,.9);border-color:#c7d2fe;box-shadow:0 2px 10px rgba(0,0,0,.05);}
.item.overdue{border-color:#fecaca;background:#fff1f2;}
.item.done .it-title{text-decoration:line-through;color:var(--text-3);}
.chk{
  width:20px;height:20px;min-width:20px;border:2px solid #cbd5e1;border-radius:6px;margin-top:2px;
  display:flex;align-items:center;justify-content:center;transition:all .15s;background:#fff;
}
.chk svg{width:12px;height:12px;color:#fff;display:none;}
.chk.checked{background:var(--success);border-color:var(--success);animation:pop .25s ease;}
.chk.checked svg{display:block;}
@keyframes pop{0%{transform:scale(1);}50%{transform:scale(1.25);}100%{transform:scale(1);}}
.it-body{flex:1;min-width:0;}
.it-title{font-size:14.5px;font-weight:500;word-break:break-word;}
.it-meta{display:flex;gap:6px;flex-wrap:wrap;margin-top:5px;align-items:center;}
.it-actions{display:flex;gap:3px;align-items:center;}
.ibtn{
  width:34px;height:34px;display:flex;align-items:center;justify-content:center;border-radius:9px;
  color:var(--text-3);transition:all .15s;position:relative;overflow:hidden;
}
.ibtn:hover{background:rgba(0,0,0,.05);color:var(--text);}
.ibtn svg{width:15px;height:15px;}
.btn-sm{
  background:var(--primary-light);color:var(--primary-dark);border-radius:9px;
  padding:7px 12px;font-size:12px;min-height:34px;font-weight:600;
}
.btn-sm:hover{background:#e0e7ff;}

/* ===== 表单 ===== */
.form-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px;}
.form-row input[type=text],.form-row textarea{flex:1;min-width:180px;}
.form-row select{min-width:96px;}
.add-btn{
  background:var(--primary);color:#fff;border-radius:12px;padding:11px 20px;
  font-size:14px;font-weight:600;min-height:44px;transition:all .15s;position:relative;overflow:hidden;
}
.add-btn:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 4px 14px rgba(79,70,229,.3);}
.divider{height:1px;background:rgba(0,0,0,.08);margin:14px 0;}

/* ===== 进度条 ===== */
.progress-wrap{height:10px;border-radius:8px;background:rgba(0,0,0,.06);overflow:hidden;}
.progress-bar{height:100%;border-radius:8px;background:linear-gradient(90deg,var(--primary),#6366f1);width:0;transition:width .8s cubic-bezier(.2,.8,.2,1);}

/* ===== 子导航 ===== */
.subtabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px;}
.subtabs button{
  padding:8px 16px;border-radius:20px;background:rgba(255,255,255,.6);border:1px solid var(--glass-border);
  color:var(--text-2);font-size:13px;min-height:40px;font-weight:500;
}
.subtabs button.active{background:var(--primary);border-color:var(--primary);color:#fff;}
.date-nav{display:flex;align-items:center;gap:8px;margin-bottom:12px;}
.date-nav input[type=date]{flex:1;}
.nav-btn{border:1px solid var(--glass-border);border-radius:11px;background:rgba(255,255,255,.7);min-width:44px;min-height:44px;color:var(--text-2);font-size:18px;transition:all .15s;}
.nav-btn:hover{background:#fff;}

/* ===== 统计 ===== */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:18px;}
.stat-card{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius);padding:20px;text-align:center;box-shadow:var(--shadow);backdrop-filter:blur(18px);animation:cardIn .45s ease both;}
.stat-num{font-size:28px;font-weight:800;color:var(--primary);}
.stat-label{font-size:12px;color:var(--text-2);margin-top:3px;font-weight:500;}
.chart-flex{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;}
.chart-box{background:var(--glass);border:1px solid var(--glass-border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);backdrop-filter:blur(18px);animation:cardIn .45s ease both;}
.chart-box h3{font-size:14px;font-weight:700;margin-bottom:12px;}

/* ===== 复盘 ===== */
.review-item{border:1px solid var(--glass-border);border-radius:14px;padding:14px;margin-bottom:10px;background:rgba(255,255,255,.62);transition:all .15s;}
.review-item:hover{background:rgba(255,255,255,.9);}
.review-head{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:8px;flex-wrap:wrap;}
.review-head .date{font-size:13px;font-weight:700;color:var(--text-2);}
.review-sec{margin-bottom:8px;font-size:13.5px;}
.review-sec .lbl{font-weight:700;font-size:11px;color:var(--text-3);display:block;margin-bottom:2px;text-transform:uppercase;letter-spacing:.5px;}
.review-sec p{white-space:pre-wrap;word-break:break-word;}

/* ===== 底部 Tab（仅移动端） ===== */
.bottom-tabs{
  position:fixed;left:0;right:0;bottom:0;z-index:100;background:rgba(0,0,0,0.22);
  display:flex;border-top:1px solid rgba(255,255,255,.14);backdrop-filter:blur(16px);
  padding-bottom:env(safe-area-inset-bottom);
}
.bottom-tabs button{
  flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;
  color:rgba(255,255,255,.7);font-size:11px;padding:8px 0 6px;min-height:58px;
}
.bottom-tabs button.active{color:#fff;font-weight:600;background:rgba(255,255,255,.1);}
.bottom-tabs svg{width:20px;height:20px;}

/* ===== 背景微调面板 ===== */
.bg-fab{
  position:fixed;right:16px;bottom:calc(84px + env(safe-area-inset-bottom));z-index:150;
  width:46px;height:46px;border-radius:50%;background:rgba(255,255,255,.88);backdrop-filter:blur(14px);
  box-shadow:0 6px 20px rgba(0,0,0,.2);display:flex;align-items:center;justify-content:center;
  color:var(--primary);transition:transform .2s,background .2s;
}
.bg-fab:hover{transform:scale(1.08);background:#fff;}
.bg-fab svg{width:20px;height:20px;}
.bg-panel{
  position:fixed;right:16px;bottom:calc(140px + env(safe-area-inset-bottom));z-index:151;width:266px;
  background:rgba(255,255,255,.93);backdrop-filter:blur(20px);border:1px solid var(--glass-border);
  border-radius:20px;box-shadow:var(--shadow-hover);padding:18px;
  opacity:0;transform:translateY(14px) scale(.96);pointer-events:none;transition:all .25s ease;
}
.bg-panel.open{opacity:1;transform:translateY(0) scale(1);pointer-events:auto;}
.bg-panel h4{font-size:14px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:6px;}
.bg-panel label{display:block;font-size:12px;color:var(--text-2);font-weight:600;margin-bottom:14px;}
.bg-panel label span{float:right;color:var(--text-3);font-weight:500;}
.bg-panel input[type=range]{width:100%;margin-top:8px;padding:0;border:none;background:transparent;height:24px;accent-color:var(--primary);}
.bg-panel .reset{width:100%;}
@media(min-width:768px){.bg-fab{bottom:24px;}.bg-panel{bottom:84px;}}

/* ===== Toast & ripple ===== */
#toast{
  position:fixed;left:50%;bottom:calc(86px + env(safe-area-inset-bottom));transform:translateX(-50%) translateY(20px);
  background:rgba(17,24,39,.88);color:#fff;padding:11px 22px;border-radius:12px;font-size:13px;
  opacity:0;pointer-events:none;transition:all .25s;z-index:200;backdrop-filter:blur(8px);
}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0);}
.ripple{position:absolute;border-radius:50%;background:rgba(255,255,255,.45);transform:scale(0);animation:ripple .6s linear;pointer-events:none;}
@keyframes ripple{to{transform:scale(4);opacity:0;}}

@media(min-width:768px){
  body{padding-bottom:24px;}
  .tabs-top{display:flex;}
  .bottom-tabs{display:none;}
  #toast{bottom:32px;}
  #search-input{display:block;}
}
@media(min-width:992px){
  .shell{padding:86px 30px 60px;}
  .topbar{padding:14px 28px;}
  .brand{font-size:22px;}
  .brand small{font-size:12px;display:inline;margin-left:8px;}
  .tabs-top button{padding:9px 18px;}
  .card{padding:24px;}
  .grid{gap:22px;}
  .form-row select{min-width:110px;}
  .form-row input[type=text],.form-row textarea{min-width:240px;}
  .today-grid{grid-template-columns:1.7fr 1fr;grid-auto-rows:min-content;}
  .today-grid .today-main{grid-row:span 2;}
  .plan-grid{grid-template-columns:330px 1fr;}
  .review-grid{grid-template-columns:400px 1fr;}
  .plan-grid > .card:first-child,
  .review-grid > .card:first-child{position:sticky;top:80px;}
  .chart-flex{grid-template-columns:repeat(3,1fr);}
}
@media(max-width:480px){
  .brand{font-size:18px;}
  .brand small{display:block;margin-left:0;margin-top:2px;}
  .icon-h span{display:none;}
  .icon-h{padding:8px;}
  .grid{grid-template-columns:1fr;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
}