/* 麦子动学 —— 学习端布局与页面样式 */

/* ===================== 登录页 ===================== */
.auth{min-height:100vh;display:grid;grid-template-columns:minmax(320px,44%) 1fr}
.auth-brand{background:var(--ink);color:#EAF0F9;padding:44px 40px;display:flex;
  flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}
.auth-brand::after{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:40px 40px;pointer-events:none}
.brand-word .mono{color:var(--wheat);letter-spacing:.16em}
.brand-word h1{font-size:38px;margin:10px 0 6px;letter-spacing:-.02em}
.brand-word p{color:#9FB0CB;font-size:14px}
.brand-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:16px;position:relative}
.brand-list li{display:flex;flex-direction:column;gap:2px;padding-left:14px;border-left:2px solid rgba(232,163,61,.5)}
.brand-list b{font-size:14.5px}
.brand-list span{font-size:13px;color:#9FB0CB}
.brand-foot{position:relative;color:#6D7F9C}
.auth-panel{display:flex;flex-direction:column;justify-content:center;padding:40px;
  max-width:560px;width:100%;margin:0 auto}
.auth-tabs{display:flex;gap:6px;background:#E9EEF6;padding:4px;border-radius:12px;margin-bottom:22px}
.auth-tab{flex:1;padding:9px;border:none;background:transparent;border-radius:9px;cursor:pointer;
  font-size:14px;font-weight:600;color:var(--muted);transition:.15s}
.auth-tab.is-on{background:#fff;color:var(--ink);box-shadow:var(--shadow)}
.auth-form{animation:fade .2s ease}
@media (max-width:860px){
  .auth{grid-template-columns:1fr}
  .auth-brand{padding:26px 22px;gap:18px}
  .brand-word h1{font-size:26px}
  .brand-list{display:none}
  .brand-foot{display:none}
  .auth-panel{padding:24px 18px 40px;justify-content:flex-start}
}

/* ===================== 主框架 ===================== */
.shell{display:grid;grid-template-columns:var(--rail-w) 1fr;min-height:100vh}
.rail{background:var(--ink);color:#D9E2F0;display:flex;flex-direction:column;
  padding:20px 16px;position:sticky;top:0;height:100vh}
.rail-brand{display:flex;align-items:center;gap:10px;padding:0 6px 18px;
  border-bottom:1px solid rgba(255,255,255,.09)}
.rail-brand b{font-size:16px;color:#fff;display:block}
.rail-brand small{color:var(--wheat);letter-spacing:.18em;font-size:10px}
.rail-mark{width:26px;height:26px;border-radius:8px;background:var(--chalk);
  box-shadow:inset 0 0 0 2px rgba(255,255,255,.25);position:relative;flex:none}
.rail-mark::after{content:"";position:absolute;right:-3px;top:-3px;width:9px;height:9px;
  border-radius:50%;background:var(--wheat)}
.rail-nav{display:flex;flex-direction:column;gap:4px;margin-top:16px;flex:1}
.rail-nav a{padding:10px 12px;border-radius:10px;font-size:14px;font-weight:600;color:#B9C6DC;
  transition:.15s;border-left:2px solid transparent}
.rail-nav a:hover{background:rgba(255,255,255,.06);color:#fff}
.rail-nav a.is-on{background:rgba(46,107,230,.22);color:#fff;border-left-color:var(--wheat)}
.rail-foot{display:flex;flex-direction:column;gap:10px}
.rail-license{font-size:12.5px;color:#9FB0CB;background:rgba(255,255,255,.05);
  border-radius:10px;padding:10px 12px;line-height:1.5}
.rail-license b{display:block;color:#fff;font-size:13px}
.rail-license.is-warn{background:rgba(217,79,61,.18);color:#F5C9C3}
.rail-license.is-warn b{color:#FFD9D4}
.rail .btn-quiet{color:#9FB0CB}
.rail .btn-quiet:hover{background:rgba(255,255,255,.08);color:#fff}

.main{display:flex;flex-direction:column;min-width:0}
.topbar{display:flex;align-items:center;gap:20px;padding:14px 26px;background:rgba(242,245,250,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.topbar-id{min-width:130px}
.topbar-id .mono{color:var(--muted)}
.topbar-id h2{font-size:17px}
.topbar-scale{flex:1;max-width:360px}
.topstatus{display:block;max-width:320px;padding:7px 12px;border-radius:11px;border:1px solid var(--line);
  background:#fff;transition:.16s}
.topstatus:hover{border-color:var(--chalk)}
.topstatus.is-warn{background:var(--alert-soft);border-color:#F3D2CD}
.topstatus-head{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.topstatus-head span{font-size:11.5px;color:var(--muted)}
.topstatus-head b{font-size:12.5px;color:var(--ink)}
.topstatus.is-warn .topstatus-head b{color:#A8362A}
.topstatus .track{height:9px;margin-top:5px;background:#DCE4F1;border-radius:5px}
.topstatus .track i{box-shadow:0 0 0 1px rgba(46,107,230,.25) inset}
.topstatus-foot{display:flex;justify-content:space-between;font-size:10.5px;color:#8592AA;
  margin-top:4px;font-variant-numeric:tabular-nums}
.topbar-user{display:flex;align-items:center;gap:10px;margin-left:auto}
.avatar{width:36px;height:36px;border-radius:11px;background:var(--chalk-soft);color:var(--chalk-d);
  display:grid;place-content:center;font-weight:700;font-size:15px}
.who small{display:block;color:var(--muted)}
.who b{font-size:13.5px}
.view{flex:1;padding:24px 26px 40px;max-width:1240px;width:100%}
.tabbar{display:none}

@media (max-width:980px){
  .shell{grid-template-columns:1fr}
  .rail{display:none}
  .topbar{padding:11px 16px;gap:12px}
  .topbar-scale{display:none}
  .view{padding:16px 14px 96px}
  .chips{top:58px;padding:8px 0}
  .tabbar{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:0;right:0;bottom:0;
    background:#fff;border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom));
    z-index:30}
  .tabbar a{padding:8px 2px;text-align:center;font-size:12px;color:var(--muted);font-weight:600}
  .tabbar a i{font-style:normal;display:block}
  .tabbar a.is-on{color:var(--chalk)}
  .tabbar a.is-on i::after{content:"";display:block;width:18px;height:2px;margin:4px auto 0;
    background:var(--wheat);border-radius:2px}
}

/* ===================== 总览 ===================== */
.hero{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);display:grid;gap:18px;
  grid-template-columns:1.4fr 1fr}
.hero h1{font-size:24px;letter-spacing:-.02em}
.hero h1 span{color:var(--chalk)}
.hero p{color:var(--muted);font-size:14px;margin-top:6px}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.hero-scale{background:linear-gradient(180deg,#FAFBFE,#F2F5FA);border:1px solid var(--line-soft);
  border-radius:12px;padding:16px}
.hero-scale .scale{height:40px}
.hero-scale .scale i{height:12px}
.hero-scale .scale i.tall{height:22px}
.hero-scale .scale i.now{height:36px}
.hero-license-line{display:none;margin-top:10px;font-size:12.5px;color:var(--muted)}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:15px}
.stat b{display:block;font-size:26px;font-weight:800;letter-spacing:-.03em;color:var(--ink);
  font-variant-numeric:tabular-nums}
.stat span{font-size:12.5px;color:var(--muted)}
.stat.is-wheat b{color:#B87715}
.stat.is-sprout b{color:#0B7A6D}
@media (max-width:860px){
  .hero{grid-template-columns:1fr;padding:18px}
  .hero h1{font-size:20px}
  .hero-scale{display:none}
  .hero-license-line{display:block}
}
.module-card{display:flex;flex-direction:column;gap:10px;cursor:pointer;transition:.18s}
.module-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift);border-color:#C9D6EA}
.module-icon{width:38px;height:38px;border-radius:11px;background:var(--chalk-soft);
  display:grid;place-content:center;font-size:19px}
.module-card h4{font-size:15px}
.module-card p{font-size:13px;color:var(--muted)}
.module-card footer{display:flex;justify-content:space-between;align-items:center;margin-top:auto;
  padding-top:10px;border-top:1px dashed var(--line)}
.grid-modules{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(268px,1fr))}

/* 首页底部的参考与致谢 */
.home-credits{display:flex;flex-wrap:wrap;gap:10px;align-items:center;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;box-shadow:var(--shadow)}
.credit-link{display:inline-flex;align-items:baseline;gap:6px;padding:8px 14px;border-radius:10px;
  background:var(--chalk-soft);border:1px solid #CDDCF8;font-size:13px;font-weight:700;
  color:var(--chalk-d);transition:.15s}
.credit-link::after{content:"↗";font-size:11px;margin-left:2px;opacity:.75}
.credit-link small{font-weight:500;color:#5B79B8;font-size:12px}
.credit-link:hover{background:#D8E5FD;border-color:var(--chalk);color:var(--chalk-d)}
.credit-link:hover::after{opacity:1}
.credit-note{flex:1 1 100%;font-size:12.5px;color:var(--muted);line-height:1.85;margin-top:4px;
  padding-top:11px;border-top:1px dashed var(--line-soft)}
@media (max-width:560px){
  .home-credits{padding:12px}
  .credit-link{font-size:12.5px;padding:6px 10px}
}

/* ===================== 动态课件 ===================== */
.chips{display:flex;gap:8px;overflow-x:auto;padding:6px 0;margin-bottom:10px;scrollbar-width:none;
  position:sticky;top:64px;z-index:6;background:rgba(242,245,250,.94);backdrop-filter:blur(6px)}
.chips::-webkit-scrollbar{display:none}
.chip{padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:13.5px;font-weight:600;color:var(--muted);cursor:pointer;white-space:nowrap;transition:.15s}
.chip:hover{border-color:var(--chalk);color:var(--chalk)}
.chip.is-on{background:var(--ink);border-color:var(--ink);color:#fff}
.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
.toolbar .grow{flex:1;min-width:180px}
.input{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:var(--radius-sm);
  font-size:14px;font-family:inherit;background:#fff}
.input:focus{outline:none;border-color:var(--chalk);box-shadow:0 0 0 3px var(--chalk-soft)}
.param-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.param{display:flex;flex-direction:column;gap:4px}
.param label{font-size:12px;color:var(--muted);font-weight:600}
.param input{padding:9px 11px;border:1px solid var(--line);border-radius:9px;font-size:14px;
  font-family:inherit;font-variant-numeric:tabular-nums}
.param input:focus{outline:none;border-color:var(--chalk)}
.param label em{font-style:normal;color:#93A0B8;font-weight:500;margin-left:4px}
.cw-card{display:flex;flex-direction:column;overflow:hidden;cursor:pointer;transition:.18s;padding:0}
.cw-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift);border-color:#C9D6EA}
.cw-thumb{height:96px;background:
    radial-gradient(120% 120% at 10% 10%, #E7EEFD 0%, transparent 60%),
    linear-gradient(135deg,#F7F9FD,#EEF3FB);
  border-bottom:1px solid var(--line-soft);position:relative;overflow:hidden}
.cw-thumb::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(46,107,230,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(46,107,230,.07) 1px,transparent 1px);
  background-size:18px 18px}
.cw-thumb .cw-icon{position:absolute;left:14px;top:12px;font-size:24px;line-height:1;
  filter:saturate(1.1)}
.cw-thumb .cw-code{position:absolute;right:12px;top:14px;font-family:var(--font-mono);
  font-size:10px;letter-spacing:.14em;color:#8FA2C2}
.cw-thumb .cw-name{position:absolute;left:14px;bottom:17px;right:12px;font-size:13px;
  font-weight:700;color:var(--ink-soft);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  padding-right:6px}
.cw-thumb .scale{position:absolute;left:12px;right:12px;bottom:6px;height:14px}
.cw-thumb .scale i{height:4px}
.cw-thumb .scale i.tall{height:7px}
.cw-thumb .scale i.now{height:11px}
.cw-body{padding:12px 13px;display:flex;flex-direction:column;gap:7px;flex:1}
.cw-body h4{font-size:14px}
.cw-body .tiny{color:var(--muted)}
.cw-foot{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:8px}
.preview-frame{width:100%;height:78vh;border:0;border-radius:12px;background:#fff}
.preview-actions{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.ai-box{background:linear-gradient(180deg,#FBFCFE,#F4F7FC);border:1px solid var(--line-soft);
  border-radius:var(--radius);padding:14px}

/* ===================== 知识点 ===================== */
.kp-modes{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.kp-mode{padding:9px 16px;border-radius:11px;border:1px solid var(--line);background:#fff;
  font-size:13.5px;font-weight:600;color:var(--muted);cursor:pointer;transition:.15s}
.kp-mode:hover{border-color:var(--chalk);color:var(--chalk)}
.kp-mode.is-on{background:var(--ink);border-color:var(--ink);color:#fff}
.stu-form{display:grid;grid-template-columns:150px 160px 150px 1fr;gap:12px;align-items:end}
.stu-form .field{margin:0}
@media (max-width:900px){
  .stu-form{grid-template-columns:1fr 1fr}
  .stu-form .stu-topic{grid-column:1 / -1}
}
@media (max-width:520px){ .stu-form{grid-template-columns:1fr} }
.stu-target{border-left:3px solid var(--chalk)}
.stu-target h3{font-size:18px}
.stu-block{margin-top:12px;padding:11px 14px;border-radius:0 11px 11px 0;font-size:13.5px;
  line-height:1.75}
.stu-block b{display:block;font-size:12px;letter-spacing:.02em;margin-bottom:3px}
.stu-block.is-std{background:var(--sprout-soft);border-left:3px solid var(--sprout)}
.stu-block.is-std b{color:#0B7A6D}
.stu-block.is-test{background:var(--chalk-soft);border-left:3px solid var(--chalk)}
.stu-block.is-test b{color:var(--chalk-d)}
.stu-block.is-plain{background:#F7F9FD;border-left:3px solid var(--line)}
.stu-block.is-plain b{color:var(--muted)}
.stu-block ul{margin:2px 0 0;padding-left:18px}
.stu-dep{cursor:pointer;transition:.16s;padding:13px 14px}
.stu-dep:hover{border-color:var(--chalk);box-shadow:var(--shadow-lift);transform:translateY(-1px)}
.stu-dep b{font-size:14px}
.path-list{display:flex;flex-direction:column;gap:0}
.path-step{display:flex;gap:12px;align-items:center;padding:11px 6px;cursor:pointer;
  border-bottom:1px dashed var(--line-soft);transition:.15s}
.path-step:last-child{border-bottom:0}
.path-step:hover{background:#F7F9FD}
.path-step.is-target{background:var(--wheat-soft);border-radius:10px}
.path-idx{color:var(--chalk-d);font-size:12px;min-width:24px}
.path-body{flex:1;display:flex;flex-direction:column;gap:2px}
.kp-item{display:flex;flex-direction:column;gap:8px;cursor:pointer;transition:.16s;position:relative;
  padding:14px 15px}
.kp-item:hover{border-color:#C9D6EA;box-shadow:var(--shadow-lift);transform:translateY(-1px)}
.kp-item .scale{height:16px;margin-top:2px}
.kp-item .scale i{height:6px}
.kp-item .scale i.now{height:13px}
.kp-head{display:flex;gap:10px;align-items:flex-start;justify-content:space-between}
.kp-head h4{font-size:15px;flex:1}
.kp-desc{font-size:13px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;
  -webkit-box-orient:vertical;overflow:hidden}
.kp-meta{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.kp-item.is-done{border-left:3px solid var(--sprout)}
.kp-item.is-learning{border-left:3px solid var(--wheat)}
.step-list{display:flex;flex-direction:column;gap:0;margin-top:6px}
.step{display:grid;grid-template-columns:64px 1fr;gap:12px;padding:12px 0;
  border-bottom:1px dashed var(--line-soft)}
.step:last-child{border-bottom:0}
.step-key{font-family:var(--font-mono);font-size:12px;color:var(--chalk-d);padding-top:2px}
.step-key b{display:block;font-family:var(--font-sans);font-size:13px;color:var(--ink)}
.chain{display:flex;flex-direction:column;gap:8px}
.chain-node{display:flex;gap:10px;align-items:center;padding:9px 11px;border-radius:10px;
  background:#F7F9FD;border:1px solid var(--line-soft);font-size:13.5px;cursor:pointer}
.chain-node:hover{border-color:var(--chalk);background:var(--chalk-soft)}
.chain-node .idx{font-family:var(--font-mono);font-size:11px;color:var(--muted);min-width:20px}
.chain-node.is-target{background:var(--wheat-soft);border-color:#F1D9AE}
.filter-panel{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px}
.pager{display:flex;justify-content:center;align-items:center;gap:12px;margin-top:18px}

/* ===================== 我的 ===================== */
.profile-head{display:flex;gap:16px;align-items:center}
.profile-head .avatar{width:56px;height:56px;border-radius:16px;font-size:22px}
.license-card{background:var(--ink);color:#E8EDF7;border-radius:var(--radius);padding:18px;
  display:flex;flex-direction:column;gap:12px}
.license-card b{font-size:16px;color:#fff}
.license-card .scale i{background:rgba(255,255,255,.2)}
.license-card .scale i.now{background:var(--wheat)}
.license-card .scale i.on{background:rgba(46,107,230,.9)}
.license-card.is-warn{background:#5B2A24}
.redeem{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}