:root{
  --bg:#0d1117;
  --bg-soft:#131a23;
  --panel:#161d27;
  --panel-2:#1b2431;
  --line:#253040;
  --txt:#e6edf3;
  --txt-dim:#8b98a9;
  --accent:#4f8cff;
  --accent-2:#22c55e;
  --warn:#f59e0b;
  --danger:#ef4444;
  --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px;line-height:1.6;
  min-height:100vh;
  background-image:radial-gradient(900px 500px at 12% -8%,rgba(79,140,255,.14),transparent 60%),
                   radial-gradient(800px 460px at 92% 0%,rgba(34,197,94,.10),transparent 60%);
  background-attachment:fixed;
}
h1,h2,h3{margin:0;font-weight:650}
button{font-family:inherit}

/* 顶栏 */
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 28px;border-bottom:1px solid var(--line);
  background:rgba(13,17,23,.72);backdrop-filter:blur(10px);
  position:sticky;top:0;z-index:20;
}
.brand{display:flex;align-items:center;gap:12px}
.logo{font-size:28px;line-height:1}
.brand h1{font-size:19px;letter-spacing:.5px}
.brand .sub{margin:0;font-size:12px;color:var(--txt-dim)}
.topbar-right{display:flex;align-items:center;gap:10px}
.streak-chip{
  display:flex;align-items:center;gap:6px;font-size:13px;color:var(--txt-dim);
  border:1px solid var(--line);border-radius:999px;padding:6px 14px;background:var(--panel);
}
.streak-chip strong{color:var(--warn);font-size:15px}

/* 按钮 */
.btn{
  border:1px solid transparent;border-radius:10px;padding:8px 16px;
  background:var(--accent);color:#fff;font-size:14px;cursor:pointer;transition:.18s;
}
.btn:hover{filter:brightness(1.1)}
.btn.primary{background:linear-gradient(180deg,#5b95ff,#3d7bf0);box-shadow:0 4px 14px rgba(79,140,255,.28)}
.btn-ghost{
  border:1px solid var(--line);background:var(--panel);color:var(--txt-dim);
  border-radius:10px;padding:7px 14px;font-size:13px;cursor:pointer;transition:.18s;
}
.btn-ghost:hover{color:var(--txt);border-color:#35455c}
.link{background:none;border:none;color:var(--accent);cursor:pointer;font-size:inherit;padding:0}
.link:hover{text-decoration:underline}

/* 标签页 */
.tabs{display:flex;gap:6px;padding:14px 28px 0;flex-wrap:wrap}
.tab{
  border:1px solid var(--line);background:var(--panel);color:var(--txt-dim);
  padding:8px 18px;border-radius:999px;font-size:14px;cursor:pointer;transition:.18s;
}
.tab:hover{color:var(--txt)}
.tab.active{background:var(--accent);border-color:var(--accent);color:#fff}

main{max-width:1120px;margin:0 auto;padding:22px 28px 60px}
.view{display:none;animation:fade .25s ease}
.view.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* 统计卡 */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}
.stat-card{
  background:linear-gradient(160deg,var(--panel-2),var(--panel));
  border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;
  display:flex;flex-direction:column;gap:4px;
}
.stat-label{font-size:12px;color:var(--txt-dim);letter-spacing:.5px}
.stat-value{font-size:28px;font-weight:700;line-height:1.2}
.stat-value small{font-size:13px;font-weight:400;color:var(--txt-dim);margin-left:4px}
.stat-hint{font-size:12px;color:var(--txt-dim)}

/* 面板 */
.panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;margin-bottom:20px;
}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.panel-head h2{font-size:16px}
.panel-head.standalone{margin:0 0 14px}
.legend{font-size:12px;color:var(--txt-dim);display:flex;align-items:center;gap:4px}
.legend i{width:11px;height:11px;border-radius:3px;display:inline-block;margin:0 1px}
.lv0{background:#1b2431}.lv1{background:#123a24}.lv2{background:#176b39}.lv3{background:#1f9d52}.lv4{background:#22c55e}

/* 热力图 */
.heatmap{display:flex;gap:4px;overflow-x:auto;padding-bottom:4px}
.heat-col{display:flex;flex-direction:column;gap:4px}
.heat-cell{width:14px;height:14px;border-radius:3px;background:#1b2431;border:1px solid rgba(255,255,255,.03)}
.heat-cell.l1{background:#123a24}.heat-cell.l2{background:#176b39}
.heat-cell.l3{background:#1f9d52}.heat-cell.l4{background:#22c55e}
.heat-cell.today{outline:2px solid var(--accent);outline-offset:1px}

/* 两栏 */
.two-col{display:grid;grid-template-columns:1.35fr 1fr;gap:20px}
.bars{display:flex;align-items:flex-end;gap:10px;height:170px;padding-top:8px}
.bar-item{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;height:100%;justify-content:flex-end}
.bar{width:100%;max-width:38px;border-radius:6px 6px 2px 2px;background:linear-gradient(180deg,#5b95ff,#2f66d6);min-height:3px}
.bar-item span{font-size:11px;color:var(--txt-dim)}

/* 番茄钟 */
.pomodoro{display:flex;flex-direction:column;align-items:center;gap:14px}
.pomo-ring{position:relative;width:150px;height:150px}
.pomo-ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring-bg{fill:none;stroke:#222f40;stroke-width:9}
.ring-fg{fill:none;stroke:var(--accent-2);stroke-width:9;stroke-linecap:round;
  stroke-dasharray:326.7;stroke-dashoffset:0;transition:stroke-dashoffset .5s linear}
.pomo-time{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-size:30px;font-weight:700;font-variant-numeric:tabular-nums;
}
.pomo-actions{display:flex;gap:10px}
.pomo-tip{font-size:12px;color:var(--txt-dim);text-align:center;margin:0}

/* 路径 */
.path-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.path-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;
  display:flex;flex-direction:column;gap:10px;position:relative;
}
.path-card h3{font-size:16px;display:flex;align-items:center;gap:8px}
.path-desc{margin:0;font-size:13px;color:var(--txt-dim)}
.progress{height:8px;border-radius:999px;background:#222f40;overflow:hidden}
.progress i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#5b95ff,#22c55e);transition:width .4s}
.path-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px;color:var(--txt-dim)}
.path-actions{display:flex;gap:6px}
.icon-btn{
  border:1px solid var(--line);background:var(--panel-2);color:var(--txt-dim);
  border-radius:8px;padding:4px 10px;font-size:12px;cursor:pointer;transition:.18s;
}
.icon-btn:hover{color:var(--txt)}
.icon-btn.danger:hover{color:var(--danger);border-color:var(--danger)}

/* 任务 */
.inline-form{display:flex;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.inline-form input[type=text]{flex:1;min-width:200px}
input,select,textarea{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;
  color:var(--txt);padding:9px 12px;font-size:14px;font-family:inherit;outline:none;transition:.18s;
}
input:focus,select:focus,textarea:focus{border-color:var(--accent)}
textarea{resize:vertical;width:100%}
.task-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.task-item{
  display:flex;align-items:center;gap:12px;padding:11px 14px;
  background:var(--panel-2);border:1px solid var(--line);border-radius:11px;
}
.task-item.done .t-title{text-decoration:line-through;color:var(--txt-dim)}
.t-title{flex:1;font-size:14px}
.t-tag{font-size:11px;color:var(--txt-dim);border:1px solid var(--line);border-radius:999px;padding:2px 9px}
.chk{
  width:20px;height:20px;border-radius:6px;border:1.5px solid #3a4a61;background:transparent;
  cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--accent-2);font-size:13px;flex:none;
}
.chk:hover{border-color:var(--accent-2)}
.empty{color:var(--txt-dim);font-size:13px;text-align:center;padding:20px}

/* 笔记 */
.note-form{display:flex;flex-direction:column;gap:10px}
.note-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.note-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;gap:8px}
.note-card h3{font-size:15px}
.note-body{margin:0;font-size:13px;color:var(--txt-dim);white-space:pre-wrap;word-break:break-word}
.note-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12px;color:var(--txt-dim)}
.tag{background:rgba(79,140,255,.14);color:#8fb6ff;border-radius:999px;padding:2px 9px;font-size:11px}
.search{width:220px}

/* 资源 */
.res-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.res-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px;
  display:flex;flex-direction:column;gap:6px;text-decoration:none;color:inherit;transition:.18s;position:relative;
}
.res-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.res-card h3{font-size:15px}
.res-card p{margin:0;font-size:12px;color:var(--txt-dim)}

/* 页脚 & toast */
.foot{
  border-top:1px solid var(--line);padding:16px 28px;display:flex;justify-content:space-between;
  color:var(--txt-dim);font-size:12px;flex-wrap:wrap;gap:8px;
}
.toast{
  position:fixed;left:50%;bottom:34px;transform:translateX(-50%);
  background:var(--panel-2);border:1px solid var(--line);border-radius:10px;
  padding:10px 20px;font-size:14px;z-index:60;box-shadow:0 10px 30px rgba(0,0,0,.4);
}

@media (max-width:900px){
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .two-col,.path-grid,.note-grid{grid-template-columns:1fr}
  .res-grid{grid-template-columns:repeat(2,1fr)}
  .topbar{padding:14px 16px}.tabs{padding:12px 16px 0}main{padding:18px 16px 50px}
}
@media (max-width:600px){
  .res-grid{grid-template-columns:1fr}
  .topbar-right .btn-ghost{display:none}
}