/* MathTopper AI Test Generator — theme */
:root{
  --blue:#1f6fe0; --blue-dark:#155bb5; --navy:#0e2a5e; --ink:#1b2a4a;
  --amber:#f5a623; --green:#1e9e6a; --red:#e05252;
  --bg:#f2f6fd; --card:#ffffff; --line:#e3eaf6; --muted:#6b7a99;
  --radius:16px; --shadow:0 10px 30px rgba(20,60,140,.08);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.55}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
a{color:var(--blue)}
.muted{color:var(--muted);font-size:.9rem}
.muted-inline{color:var(--muted);font-weight:400;font-size:.82rem}

/* top bar */
.topbar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--navy);font-weight:700;font-size:1.05rem}
.brand img{height:38px}
.brand span{border-left:2px solid var(--line);padding-left:10px;font-weight:600;color:var(--blue-dark)}
.topnav{display:flex;align-items:center;gap:14px}
.navlink{text-decoration:none;color:var(--ink);font-weight:600}
.navlink:hover{color:var(--blue)}
.navuser{color:var(--muted);font-size:.92rem}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid transparent;border-radius:12px;
  padding:10px 18px;font-size:.95rem;font-weight:700;cursor:pointer;text-decoration:none;
  transition:transform .06s ease, box-shadow .15s ease, background .15s ease}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue-dark));color:#fff;box-shadow:0 8px 18px rgba(31,111,224,.35)}
.btn-primary:hover{filter:brightness(1.06)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue-dark)}
.btn-sm{padding:7px 12px;font-size:.85rem;border-radius:10px}
.btn-lg{padding:13px 26px;font-size:1.02rem}
.btn-danger{background:#fff;border-color:#f3c1c1;color:var(--red)}
.btn:disabled{opacity:.55;cursor:wait}

/* hero */
.hero{background:linear-gradient(160deg,#0e2a5e 0%,#174a9e 60%,#1f6fe0 100%);color:#fff;padding:52px 0 40px;margin-bottom:28px}
.hero h1{margin:0 0 8px;font-size:2.1rem;letter-spacing:-.5px}
.hero h1 em{font-style:normal;color:var(--amber)}
.hero .sub{opacity:.85;max-width:640px;margin:0 0 22px}
.prompt-card{background:#fff;color:var(--ink);border-radius:20px;padding:22px;box-shadow:var(--shadow)}
.prompt-card label{font-weight:700;display:block;margin-bottom:8px}
.prompt-card textarea{width:100%;border:2px solid var(--line);border-radius:12px;padding:12px 14px;
  font-size:1rem;font-family:inherit;resize:vertical}
.prompt-card textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 4px rgba(31,111,224,.12)}
.chips{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:12px 0}
.chips span{color:var(--muted);font-size:.88rem}
.chip{background:#eef4ff;border:1px solid #d7e5ff;color:var(--blue-dark);border-radius:999px;
  padding:6px 13px;font-size:.85rem;cursor:pointer;font-weight:600}
.chip:hover{background:#dfeaff}
.prompt-actions{display:flex;gap:12px;justify-content:flex-end;flex-wrap:wrap}

/* layout cards */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-bottom:22px}
@media(max-width:900px){.grid2{grid-template-columns:1fr}}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin-bottom:22px;border:1px solid #eaf0fb}
.card h2{margin:0 0 4px;font-size:1.25rem;display:flex;align-items:center;gap:8px}
.card h2 span{color:var(--navy)}
.hint{color:var(--muted);font-size:.88rem;margin:0 0 16px}
.link-right{margin-left:auto;font-size:.88rem;text-decoration:none}

/* forms */
.frow{display:flex;gap:14px;flex-wrap:wrap}
.field{margin-bottom:14px;min-width:0}
.field.grow{flex:1}
.field label{display:block;font-weight:700;font-size:.9rem;margin-bottom:6px;color:var(--navy)}
.field input[type=text],.field input[type=number],.field input[type=date],
.field input[type=tel],.field input[type=password],.field input[type=email],
.field select,.field textarea{width:100%;border:1.5px solid var(--line);border-radius:10px;
  padding:9px 12px;font-size:.95rem;font-family:inherit;background:#fbfdff}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(31,111,224,.12)}
.mini-actions{float:right;font-weight:400;font-size:.8rem}
.mini-actions a{text-decoration:none}
.checklist{max-height:210px;overflow:auto;border:1.5px solid var(--line);border-radius:10px;padding:8px 10px;background:#fbfdff}
.checklist label{display:flex;gap:9px;align-items:flex-start;font-weight:500;font-size:.9rem;padding:5px 4px;border-radius:8px;cursor:pointer}
.checklist label:hover{background:#eef4ff}
.checklist input{margin-top:4px;accent-color:var(--blue)}
.pillrow{display:flex;gap:8px;flex-wrap:wrap}
.pill{border:1.5px solid var(--line);background:#fbfdff;border-radius:999px;padding:7px 14px;font-size:.88rem;cursor:pointer;user-select:none}
.pill.on{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:700}
.typerow{display:flex;gap:10px}
.typerow>div{flex:1;background:#fbfdff;border:1.5px solid var(--line);border-radius:10px;padding:8px 10px}
.typerow span{display:block;font-size:.78rem;font-weight:700;color:var(--muted);margin-bottom:4px}
.typerow input{width:100%;border:none;background:transparent;font-size:1.05rem;font-weight:700;color:var(--navy)}
.typerow input:focus{outline:none}
.logobox{display:flex;align-items:center;gap:10px}
.logobox img{height:44px;border:1px solid var(--line);border-radius:8px;background:#fff}
.filebtn{cursor:pointer}

/* recent */
.recent-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.recent-item{border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:#fbfdff}
.recent-item b{display:block;color:var(--navy)}
.recent-item small{color:var(--muted)}
.recent-item .row{display:flex;gap:8px;margin-top:8px}

/* modal */
.modal{position:fixed;inset:0;background:rgba(10,25,60,.55);display:flex;align-items:flex-start;
  justify-content:center;padding:40px 16px;z-index:100;overflow:auto}
.modal[hidden]{display:none}
.modal-box{background:#fff;border-radius:20px;max-width:640px;width:100%;padding:28px;box-shadow:0 30px 80px rgba(0,0,0,.25)}
.modal-box h2{margin-top:0;color:var(--navy)}
.modal-actions{display:flex;justify-content:space-between;margin-top:20px}
.bp-chips{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.bp-chip{background:#eef4ff;border:1px solid #cfe1ff;color:var(--navy);border-radius:10px;padding:7px 12px;font-size:.88rem}
.bp-chip b{color:var(--blue-dark)}
.bp-sec{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:12px;padding:10px 14px;margin-bottom:8px}
.bp-sec .grow{flex:1}
.bp-sec input{width:70px;border:1.5px solid var(--line);border-radius:8px;padding:6px 8px;font-size:.95rem}
.bp-total{margin-top:12px;font-size:1.05rem;color:var(--navy)}
.bp-note{background:#fff8e6;border:1px solid #f5dfa0;color:#8a5c00;border-radius:10px;padding:8px 12px;font-size:.88rem;margin:6px 0}

/* toast */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--navy);color:#fff;
  padding:12px 22px;border-radius:12px;box-shadow:0 12px 30px rgba(0,0,0,.3);z-index:200;font-weight:600}
.toast[hidden]{display:none}

.footer{text-align:center;color:var(--muted);font-size:.85rem;padding:26px 0 40px}

/* ---------- paper page ---------- */
.paper-toolbar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40;padding:10px 0;box-shadow:0 2px 12px rgba(20,60,140,.06)}
.paper-toolbar .wrap{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.tb-group{display:flex;gap:8px;align-items:center;background:#f4f8ff;border:1px solid var(--line);border-radius:12px;padding:6px 10px}
.tb-group .lbl{font-size:.78rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.4px}
.seg{display:flex;border:1.5px solid var(--line);border-radius:10px;overflow:hidden}
.seg button{border:none;background:#fff;padding:8px 14px;font-weight:700;cursor:pointer;color:var(--muted)}
.seg button.on{background:var(--blue);color:#fff}
.tb-spacer{flex:1}

.paper-wrap{max-width:860px;margin:26px auto;background:#fff;border-radius:8px;box-shadow:var(--shadow);
  border:1px solid var(--line);overflow:hidden}
.paper{padding:48px 52px;color:#111;font-size:15px}
@media(max-width:700px){.paper{padding:28px 22px}}
.p-head{text-align:center;border-bottom:3px double #111;padding-bottom:14px;margin-bottom:6px}
.p-school{display:flex;align-items:center;justify-content:center;gap:14px}
.p-school img{height:64px}
.p-school-name{font-size:1.55rem;font-weight:800;letter-spacing:.5px}
.p-exam{font-size:1.15rem;font-weight:700;margin-top:6px}
.p-meta{display:flex;flex-wrap:wrap;gap:6px 22px;justify-content:space-between;border-bottom:1px solid #111;
  padding:8px 2px;margin-bottom:10px;font-size:.95rem}
.p-meta b{font-weight:700}
.p-instr{font-size:.88rem;margin:0 0 14px}
.p-instr ol{margin:6px 0;padding-left:20px}
.p-sec-head{background:#f0f0f0;border:1px solid #999;border-left:6px solid var(--navy);
  padding:7px 12px;font-weight:800;margin:20px 0 10px;font-size:1rem}
.p-sec-head small{font-weight:600;color:#444}
.p-q{display:flex;gap:10px;margin:0 0 12px;page-break-inside:avoid}
.p-qnum{font-weight:800;min-width:28px}
.p-qbody{flex:1}
.p-marks{font-weight:700;white-space:nowrap}
.p-marks input{width:38px;border:1px dashed #999;border-radius:6px;text-align:center;font-weight:700}
.p-rubric{font-style:italic;color:#333;margin-bottom:4px}
.p-opts{display:grid;grid-template-columns:1fr 1fr;gap:6px 18px;margin-top:8px}
@media(max-width:600px){.p-opts{grid-template-columns:1fr}}
.p-opt{display:flex;gap:8px;align-items:flex-start}
.p-opt .ol{font-weight:700}
body.teacher-copy .p-opt.correct{background:#e8f7ee;border:1px solid #9ed9b4;border-radius:8px;padding:4px 8px}
body.teacher-copy .p-opt.correct .ol{color:var(--green)}
.p-sol{background:#fbfdff;border:1px dashed var(--blue);border-radius:10px;padding:10px 14px;margin-top:8px;font-size:.92rem}
.p-sol .sol-tag{font-weight:800;color:var(--blue-dark);font-size:.8rem;text-transform:uppercase;letter-spacing:.5px}
.p-foot{margin-top:26px;border-top:1px solid #111;padding-top:10px;display:flex;justify-content:space-between;font-size:.9rem}
.p-qimg{max-width:100%;margin-top:8px;border:1px solid var(--line);border-radius:8px}
.q-tools{display:flex;gap:6px;margin-top:6px}
.q-tools button{border:1px solid var(--line);background:#fff;border-radius:8px;font-size:.75rem;padding:3px 9px;cursor:pointer;color:var(--muted)}
.q-tools button:hover{border-color:var(--red);color:var(--red)}
.teacher-only{display:none}
body.teacher-copy .teacher-only{display:block}
body.teacher-copy .student-only{display:none}

/* login */
.login-wrap{max-width:420px;margin:60px auto}
.login-card{background:#fff;border-radius:20px;box-shadow:var(--shadow);padding:34px;border:1px solid #eaf0fb;text-align:center}
.login-card img{height:52px;margin-bottom:10px}

/* tests list */
.test-table{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
.test-table th,.test-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:.92rem}
.test-table th{background:#eef4ff;color:var(--navy)}
.test-table tr:hover td{background:#f8fbff}

/* ---------- print ---------- */
@media print{
  .topbar,.paper-toolbar,.q-tools,.footer,.no-print{display:none!important}
  body{background:#fff}
  .paper-wrap{box-shadow:none;border:none;margin:0;max-width:none;border-radius:0}
  .paper{padding:0}
  .p-marks input{border:none}
  @page{size:A4;margin:14mm}
}

/* ---------- settings modal (gear) ---------- */
.modal-wide{max-width:1060px;max-height:92vh;overflow-y:auto}
.card.flat{box-shadow:none;border:1px solid var(--line);margin-bottom:0}
.gear-btn{position:relative;font-size:1.15rem;padding:10px 14px}
.gear-btn .dot{position:absolute;top:6px;right:6px;width:9px;height:9px;border-radius:50%;background:#e63946;border:2px solid #fff}
.center{text-align:center}
.modal-actions-end{justify-content:flex-end}
.muted-inline{font-size:.8rem;color:var(--muted);font-weight:400}

/* ---- question edit modal + equation editor ---- */
.eqbar{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.eqbtn{border:1px solid var(--line);background:#fff;border-radius:8px;padding:5px 10px;font-size:13px;cursor:pointer;color:var(--ink)}
.eqbtn:hover{border-color:var(--blue);color:var(--blue)}
.eqbtn.eqwrap{background:#eaf2fe;border-color:#c9ddfb}
.eq-preview{margin-top:8px;border:1px dashed var(--line);border-radius:10px;padding:10px 12px;background:#fbfcff;min-height:48px}
.eq-preview .lbl{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;display:block;margin-bottom:4px}
.eqopt{display:flex;gap:8px;align-items:flex-start;margin-bottom:8px}
.eqopt textarea{flex:1}
.eqopt input[type=radio]{margin-top:12px;transform:scale(1.35);accent-color:var(--green);cursor:pointer}
#editModal textarea{width:100%;font-family:inherit;font-size:14px;padding:10px;border:1px solid var(--line);border-radius:10px;resize:vertical;color:var(--ink)}
#editModal textarea:focus{outline:2px solid #c9ddfb;border-color:var(--blue)}
.muted-inline{color:var(--muted);font-weight:400}

/* ---- paper settings modal ---- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
.form-grid .field{margin-bottom:12px}
#psModal .field label{display:block;font-weight:600;font-size:13px;margin-bottom:4px;color:var(--navy)}
#psModal .field input[type=text],#psModal .field input[type=date]{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:10px;font-size:14px;font-family:inherit;color:var(--ink)}
#psModal textarea{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:10px;font-size:14px;font-family:inherit;color:var(--ink);resize:vertical}

/* ---------- landing page ---------- */
.btn-lg{padding:14px 26px;font-size:1.05rem;border-radius:14px}
.lp-hero{background:linear-gradient(180deg,#e8f0fd 0%,var(--bg) 100%);padding:64px 0 40px}
.lp-hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.lp-badge{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:6px 14px;font-size:.85rem;font-weight:700;color:var(--blue-dark);box-shadow:var(--shadow)}
.lp-hero h1{font-size:2.7rem;line-height:1.12;color:var(--navy);margin:18px 0 14px}
.lp-hero h1 em{font-style:normal;color:var(--blue)}
.lp-lead{font-size:1.08rem;color:#3c4f76;max-width:34rem}
.lp-cta-row{display:flex;gap:12px;margin:24px 0 14px;flex-wrap:wrap}
.lp-hero-card{background:#fff;border-radius:20px;box-shadow:var(--shadow);border:1px solid #eaf0fb;padding:22px}
.lp-demo-prompt{background:#f0f5ff;border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:.92rem}
.lp-demo-arrow{text-align:center;font-size:1.3rem;margin:8px 0;color:var(--blue)}
.lp-demo-paper{border:1.5px solid var(--line);border-radius:12px;padding:16px;font-size:.9rem}
.lp-demo-paper>b{display:block;text-align:center;color:var(--navy)}
.lp-demo-paper>span{display:block;text-align:center;color:var(--muted);font-size:.8rem;margin-bottom:10px}
.lp-demo-sec{background:#eef3fd;border-left:4px solid var(--blue);font-weight:700;font-size:.82rem;
  padding:5px 10px;margin:10px 0 6px;color:var(--navy)}
.lp-demo-q{padding:3px 0 3px 8px;color:#3c4f76}
.lp-demo-q i{color:var(--muted);font-style:normal}
.lp-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:44px}
.lp-stat{background:#fff;border:1px solid #eaf0fb;border-radius:14px;box-shadow:var(--shadow);
  padding:18px;text-align:center}
.lp-stat b{display:block;font-size:1.6rem;color:var(--navy)}
.lp-stat span{color:var(--muted);font-size:.88rem}
.lp-section{padding:64px 0}
.lp-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.lp-section h2{text-align:center;color:var(--navy);font-size:1.9rem;margin:0 0 8px}
.lp-sub{text-align:center;color:var(--muted);max-width:38rem;margin:0 auto 34px}
.lp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.lp-grid-4{grid-template-columns:repeat(4,1fr)}
.lp-card{background:#fff;border:1px solid #eaf0fb;border-radius:16px;box-shadow:var(--shadow);padding:24px}
.lp-alt .lp-card{background:var(--bg)}
.lp-ico{font-size:1.9rem;margin-bottom:10px}
.lp-card h3{margin:0 0 8px;color:var(--navy);font-size:1.08rem}
.lp-card p{margin:0;color:#3c4f76;font-size:.94rem}
.lp-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}
.lp-step{text-align:center;padding:10px}
.lp-step-n{width:52px;height:52px;border-radius:50%;background:var(--navy);color:#fff;font-weight:800;
  font-size:1.3rem;display:flex;align-items:center;justify-content:center;margin:0 auto 14px}
.lp-step h3{color:var(--navy);margin:0 0 6px}
.lp-step p{color:var(--muted);margin:0}
.lp-cta{background:linear-gradient(135deg,var(--navy),var(--blue-dark));color:#fff;text-align:center;padding:70px 0}
.lp-cta h2{color:#fff;font-size:2rem;margin:0 0 10px}
.lp-cta p{opacity:.85;margin:0 0 26px}
.lp-footer{padding:22px 0;background:#fff;border-top:1px solid var(--line)}
.lp-footer .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
@media(max-width:900px){
  .lp-hero-inner{grid-template-columns:1fr}
  .lp-hero h1{font-size:2.1rem}
  .lp-grid{grid-template-columns:1fr 1fr}
  .lp-grid-4{grid-template-columns:1fr 1fr}
  .lp-stats{grid-template-columns:1fr 1fr}
  .lp-steps{grid-template-columns:1fr}
}
@media(max-width:560px){.lp-grid,.lp-grid-4{grid-template-columns:1fr}}

/* ---------- dashboard ---------- */
.dash-hero{display:flex;justify-content:space-between;align-items:center;gap:20px;
  padding:36px 0 8px;flex-wrap:wrap}
.dash-hero h1{margin:0 0 4px;color:var(--navy);font-size:1.8rem}
.dash-stats{display:flex;gap:12px}
.dash-stat{background:#fff;border:1px solid #eaf0fb;border-radius:14px;box-shadow:var(--shadow);
  padding:14px 22px;text-align:center;min-width:110px}
.dash-stat b{display:block;font-size:1.5rem;color:var(--navy)}
.dash-stat span{color:var(--muted);font-size:.85rem}
.dash-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:26px 0 30px}
.dash-tile{background:#fff;border:1.5px solid #eaf0fb;border-radius:18px;box-shadow:var(--shadow);
  padding:28px;text-decoration:none;color:var(--ink);display:block;position:relative;
  transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}
a.dash-tile:hover{transform:translateY(-3px);box-shadow:0 16px 36px rgba(20,60,140,.13);border-color:var(--blue)}
.dash-ico{font-size:2.4rem;margin-bottom:12px}
.dash-tile h3{margin:0 0 8px;color:var(--navy);font-size:1.2rem}
.dash-tile p{margin:0 0 14px;color:#3c4f76;font-size:.95rem}
.dash-go{font-weight:700;color:var(--blue)}
.dash-soon{opacity:.75;cursor:default}
.dash-soon:hover{transform:none;box-shadow:var(--shadow);border-color:#eaf0fb}
.dash-badge{display:inline-block;background:#fff3d6;color:#8a5a00;border:1px solid #f0d48a;
  font-size:.78rem;font-weight:700;border-radius:999px;padding:4px 12px}
.dash-foot{text-align:center;margin:10px 0 30px}
@media(max-width:700px){.dash-grid{grid-template-columns:1fr}}

/* ---------- content library (worksheets / papers) ---------- */
.lib-head{padding:32px 0 4px}
.lib-head h1{margin:0 0 4px;color:var(--navy);font-size:1.7rem}
.lib-filters{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px;margin:18px 0 6px}
.lib-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:14px 0 30px}
.lib-card{background:#fff;border:1px solid #eaf0fb;border-radius:16px;box-shadow:var(--shadow);
  padding:20px;display:flex;flex-direction:column}
.lib-card h3{margin:0 0 6px;color:var(--navy);font-size:1.02rem}
.lib-card p{margin:0 0 14px;font-size:.88rem}
.lib-actions{margin-top:auto;display:flex;gap:10px;flex-wrap:wrap}
@media(max-width:900px){.lib-grid{grid-template-columns:1fr 1fr}.lib-filters{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.lib-grid{grid-template-columns:1fr}.lib-filters{grid-template-columns:1fr}}

/* ---------- notes library ---------- */
.notes-h2{color:var(--navy);font-size:1.25rem;margin:26px 0 12px}
.notes-list{display:flex;flex-direction:column;gap:12px;margin-bottom:30px}
.notes-topic{background:#fff;border:1px solid #eaf0fb;border-radius:14px;box-shadow:var(--shadow);padding:16px 18px}
.notes-topic-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.notes-topic-head b{color:var(--navy)}
.notes-subs{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.notes-sub{background:#f0f5ff;border:1px solid var(--line);border-radius:999px;padding:4px 12px;font-size:.82rem}
.notes-sub a{margin-left:6px;font-weight:700}

/* ---------- lesson plan ---------- */
.lp-form{padding:24px;margin:18px 0 10px}
.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.lp-actions{display:flex;gap:10px;margin:24px 0 6px;flex-wrap:wrap}
.lp-paper{background:#fff;border:1px solid #eaf0fb;border-radius:16px;box-shadow:var(--shadow);padding:32px;margin:10px 0 30px}
.lp-paper h1{color:var(--navy);margin:0 0 6px;font-size:1.6rem}
.lp-table{width:100%;border-collapse:collapse;margin-top:18px;font-size:.9rem}
.lp-table th{background:var(--navy);color:#fff;padding:10px;text-align:left}
.lp-table td{border:1px solid var(--line);padding:9px 10px;vertical-align:top}
.lp-table tr:nth-child(even) td{background:#f7faff}
.flash-ok{background:#e6f7ee;border:1px solid #9fdcb8;color:#146c43;border-radius:12px;padding:10px 16px;font-weight:600}
.flash-err{background:#fdecec;border:1px solid #f3b0b0;color:#a02a2a;border-radius:12px;padding:10px 16px;font-weight:600}

/* ---------- syllabus tracker ---------- */
.syl-progress{background:#e6ecf7;border-radius:999px;height:14px;overflow:hidden;margin:16px 0 6px}
.syl-bar{height:100%;background:linear-gradient(90deg,var(--green),#35c37e);border-radius:999px;transition:width .3s}
.syl-list{display:flex;flex-direction:column;gap:10px;margin:14px 0 30px}
.syl-row{display:flex;align-items:center;gap:14px;background:#fff;border:1.5px solid #eaf0fb;border-radius:14px;
  box-shadow:var(--shadow);padding:14px 18px;cursor:pointer;text-align:left;font-size:.98rem;color:var(--ink);width:100%}
.syl-row:hover{border-color:var(--blue)}
.syl-check{font-size:1.3rem;color:var(--muted);min-width:26px;text-align:center}
.syl-row.done{border-color:var(--green);background:#f2fbf6}
.syl-row.done .syl-check{color:var(--green)}
.syl-row.done .syl-name{text-decoration:line-through;color:var(--muted)}
@media(max-width:700px){.form-grid{grid-template-columns:1fr}}
@media print{.no-print{display:none!important}.lp-paper{box-shadow:none;border:none;padding:0}}

/* ---------- syllabus tree ---------- */
.syl-tree{display:flex;flex-direction:column;gap:10px;margin:14px 0 30px}
.syl-chap,.syl-topic{background:#fff;border:1.5px solid #eaf0fb;border-radius:14px;box-shadow:var(--shadow)}
.syl-chap summary,.syl-topic summary{display:flex;align-items:center;gap:12px;padding:14px 18px;
  cursor:pointer;list-style:none}
.syl-chap summary::-webkit-details-marker,.syl-topic summary::-webkit-details-marker{display:none}
.syl-chap summary:hover,.syl-topic summary:hover{border-color:var(--blue)}
.syl-chap{padding:0}
.syl-chap.done{border-color:var(--green);background:#f2fbf6}
.syl-topic{margin:0;border:none;border-top:1px solid var(--line);border-radius:0;box-shadow:none}
.syl-topic.done{background:#f2fbf6}
.syl-topics{padding:0 12px 12px 12px}
.syl-check{background:none;border:none;font-size:1.25rem;cursor:pointer;color:var(--muted);
  min-width:28px;padding:0;line-height:1}
.syl-check.on{color:var(--green)}
.syl-check:hover{transform:scale(1.15)}
.syl-name{flex:1;font-weight:600;color:var(--ink)}
.done > summary > .syl-name{text-decoration:line-through;color:var(--muted)}
.syl-count{font-size:.8rem;color:var(--muted);background:#f0f5ff;border-radius:999px;padding:2px 10px;white-space:nowrap}
.syl-caret{color:var(--muted);font-size:.85rem;transition:transform .2s}
details[open] > summary .syl-caret{transform:rotate(180deg)}
.syl-subs{padding:4px 12px 12px 12px;display:flex;flex-direction:column;gap:6px}
.syl-sub{display:flex;align-items:center;gap:12px;padding:9px 12px;background:#f7faff;
  border:1px solid var(--line);border-radius:10px}
.syl-sub.done{background:#f2fbf6;border-color:#bfe6cf}
.syl-sub.done .syl-name{text-decoration:line-through;color:var(--muted);font-weight:400}
.syl-topic-leaf{display:flex;align-items:center;gap:12px;padding:12px 18px;border-top:1px solid var(--line)}
.syl-topic-leaf.done{background:#f2fbf6}
.syl-topic-leaf.done .syl-name{text-decoration:line-through;color:var(--muted)}

/* ---------- AI presentation maker ---------- */
.gen-card{margin:18px 0}
.gen-row{display:flex;gap:10px;align-items:flex-start}
.gen-row textarea{flex:1;border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;
  font:inherit;resize:vertical;min-height:56px}
.gearbtn{position:relative;font-size:1.5rem;background:#f0f5ff;border:1.5px solid var(--line);
  border-radius:12px;width:52px;height:52px;cursor:pointer;flex:none}
.gearbtn .dot{position:absolute;top:8px;right:8px;width:10px;height:10px;border-radius:50%;
  background:var(--orange,#e8730c)}
.gen-actions{display:flex;gap:10px;align-items:center;margin-top:12px;flex-wrap:wrap}
.chk{display:flex;gap:8px;align-items:center;margin:8px 0;font-size:.95rem}
.pres-preview{margin:0 0 6px;padding-left:24px;display:flex;flex-direction:column;gap:6px;
  max-height:320px;overflow:auto}
.pres-preview li{font-size:.95rem}
.pbadge{font-size:.7rem;background:#eef3ff;color:var(--blue);border-radius:999px;padding:2px 8px;
  margin-right:6px;text-transform:uppercase;letter-spacing:.4px}

/* viewer */
.pres-body{background:#0f1b2d;margin:0;min-height:100vh}
.pres-toolbar{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;gap:10px;align-items:center;
  padding:10px 16px;background:rgba(15,27,45,.92);backdrop-filter:blur(6px);color:#fff}
.pres-title{flex:1;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pres-count{color:#9fb3cc;font-size:.9rem}
.pres-progress{position:fixed;top:58px;left:0;right:0;height:4px;background:#1e2f4a;z-index:50}
.pres-progress div{height:100%;background:linear-gradient(90deg,var(--blue),#7aa5ff);width:0;transition:width .3s}
.pres-stage{min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:90px 70px 40px;box-sizing:border-box}
.pres-nav{position:fixed;top:50%;transform:translateY(-50%);z-index:40;font-size:2.2rem;
  background:rgba(255,255,255,.08);color:#fff;border:none;border-radius:50%;width:56px;height:56px;cursor:pointer}
.pres-nav:hover{background:rgba(255,255,255,.22)}
.pres-nav.prev{left:14px}.pres-nav.next{right:14px}
.pres-slide{width:min(1060px,100%);aspect-ratio:16/9;max-height:calc(100vh - 150px);overflow:auto;
  background:#fff;border-radius:18px;box-shadow:0 24px 70px rgba(0,0,0,.5);padding:44px 52px;box-sizing:border-box}
.pslide{position:relative;min-height:100%;display:flex;flex-direction:column}
.pslide h2{margin:0 0 18px;color:var(--ink);font-size:1.7rem;border-bottom:3px solid var(--blue);
  padding-bottom:10px}
.ps-titlecard{margin:auto;text-align:center}
.ps-kicker{color:var(--blue);font-weight:700;letter-spacing:2px;text-transform:uppercase;font-size:.85rem}
.ps-titlecard h1{font-size:2.6rem;margin:14px 0;color:var(--ink)}
.ps-sub p{color:var(--muted);font-size:1.05rem;margin:6px 0}
.ps-bullets{font-size:1.25rem;line-height:2;list-style:none;padding:0}
.ps-bullets li{padding-left:34px;position:relative}
.ps-bullets li::before{content:"▸";position:absolute;left:4px;color:var(--blue)}
.ps-html{font-size:1.12rem;line-height:1.75}
.ps-img{max-width:44%;max-height:38vh;float:right;margin:0 0 14px 20px;border-radius:12px;
  border:1px solid var(--line);box-shadow:0 6px 18px rgba(0,0,0,.08);background:#fff}
.ps-titleimg{max-width:52%;max-height:34vh;margin:18px auto 6px;display:block;border-radius:14px;
  border:1px solid var(--line);box-shadow:0 10px 26px rgba(0,0,0,.10)}
.ps-print .ps-img{float:none;max-width:70%;display:block;margin:10px auto}
.ps-embed{width:100%;height:52vh;border:1.5px solid var(--line);border-radius:12px;background:#f7faff}
.ps-solbtn{margin-top:16px;align-self:flex-start}
.myth{background:#fff1f1;border-left:5px solid #e5484d;padding:.8rem 1rem;border-radius:8px;margin-bottom:.6rem}
.fact{background:#f0faf2;border-left:5px solid #2f9e44;padding:.8rem 1rem;border-radius:8px;margin-bottom:1rem}
.ps-solution{margin-top:12px;background:#f2fbf6;border:1.5px solid #bfe6cf;border-radius:12px;
  padding:14px 18px;font-size:1.05rem}
.ps-foot{margin-top:auto;padding-top:18px;color:#9aa7bd;font-size:.78rem;text-align:center}
/* summary-module content styles */
.explain{background:#f8f9fa;padding:1.1rem 1.3rem;border-radius:10px;border:1px solid #e6e6e6;margin-bottom:.8rem}
.note{background:#fff7dd;border-left:5px solid #ffcc00;padding:.9rem 1.1rem;border-radius:8px;margin-bottom:.8rem}
.pq-stem{font-size:1.2rem;margin-bottom:10px}
.pq-opts{font-size:1.1rem;line-height:1.9}
.pres-print{display:none}
@media print{
  .no-print,.pres-toolbar,.pres-progress,.pres-stage{display:none!important}
  .pres-body{background:#fff}
  .pres-print{display:block}
  .ps-print{page-break-after:always;padding:20px}
  .ps-print h2{border-bottom:2px solid #333}
}