/* ===========================================================================
   Associate CET Study — app.css
   =========================================================================== */
:root{
  --bg:#eef1f7; --panel:#fff; --text:#0f172a; --muted:#64748b;
  --header:#0f172a; --header2:#172033;
  --primary:#4f46e5; --primary-hover:#4338ca; --primary-soft:#eef2ff;
  --accent:#7c3aed; --border:#e6e9f1; --radius:16px; --radius-sm:10px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.06),0 1px 3px rgba(15,23,42,.07);
  --shadow:0 10px 30px -12px rgba(15,23,42,.18),0 2px 6px -2px rgba(15,23,42,.08);
  --ring:0 0 0 3px rgba(79,70,229,.22);
}
*{box-sizing:border-box;}
html{height:100%;}
body{
  min-height:100%;
  margin:0; background:var(--bg); color:var(--text);
  font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,"Segoe UI Emoji";
  background-image:radial-gradient(1100px 560px at 82% -8%,rgba(79,70,229,.07),transparent 60%),
                   radial-gradient(950px 480px at -8% 8%,rgba(124,58,237,.05),transparent 55%);
  background-attachment:fixed; -webkit-font-smoothing:antialiased;
}
.container{width:min(1200px,95vw); margin:0 auto; padding:0 16px;}
a{color:var(--primary);}
h1,h2,h3{color:var(--text);}

/* ── Header / nav ── */
.topstick{position:sticky; top:0; z-index:30;}
.site-header{background:linear-gradient(180deg,var(--header),var(--header2)); color:#fff; box-shadow:0 2px 14px rgba(15,23,42,.22);}
.hdr-inner{display:flex; align-items:center; gap:16px; padding:12px 16px; flex-wrap:wrap;}
.brand{display:inline-flex; align-items:center; gap:10px; color:#fff; text-decoration:none; font-weight:800; letter-spacing:.2px;}
.brand-mark{font-size:1.4rem;}
.brand-text{font-size:1.05rem;}
/* Exam-selector row — pinned to the top via the .topstick wrapper */
.exam-bar{background:#111a2e; border-bottom:1px solid rgba(255,255,255,.08);}
.exam-bar-inner{display:flex; align-items:center; gap:14px; padding:8px 16px; flex-wrap:wrap;}
.exam-bar-label{color:#cbd5e1; font-size:.82rem; font-weight:600; flex-shrink:0;}
.exam-bar-label b{color:#fff; font-weight:800;}
.exam-groups{display:flex; gap:8px; margin-left:auto; flex-wrap:wrap;}
.exam-dd{position:relative;}
.exam-dd-btn{display:inline-flex; align-items:center; gap:6px; cursor:pointer; white-space:nowrap;
  background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.14); color:#cbd5e1;
  font-weight:700; font-size:.85rem; padding:7px 13px; border-radius:9px; transition:background .12s,color .12s,border-color .12s;}
.exam-dd-btn:hover{background:rgba(255,255,255,.14); color:#fff;}
.exam-dd.has-current .exam-dd-btn{background:var(--primary); border-color:var(--primary); color:#fff;}
.exam-dd-caret{font-size:.7rem; opacity:.8; transition:transform .15s;}
.exam-dd.open .exam-dd-caret{transform:rotate(180deg);}
.exam-dd-menu{position:absolute; top:calc(100% + 6px); left:0; min-width:200px; z-index:40;
  background:var(--panel); border:1px solid var(--border); border-radius:12px; box-shadow:0 10px 30px rgba(0,0,0,.28);
  padding:6px; display:none;}
.exam-dd.open .exam-dd-menu{display:block;}
.exam-dd-item{display:flex; align-items:center; gap:8px; text-decoration:none; color:var(--text);
  padding:9px 11px; border-radius:8px; font-size:.9rem; font-weight:600;}
.exam-dd-item:hover{background:var(--primary-soft);}
.exam-dd-item.current{background:var(--primary-soft); color:var(--primary); font-weight:800;}
.exam-dd-name{flex:1;}
.exam-dd-meta{font-size:.7rem; font-weight:800; color:var(--muted); background:var(--panel2,#f1f5f9); padding:1px 7px; border-radius:999px;}
.exam-dd-check{color:var(--primary); font-weight:900;}
[data-theme="light"] .exam-bar{background:#1e293b;}
@media (max-width:560px){ .exam-bar-label{width:100%;} .exam-groups{margin-left:0;} }
.nav{display:flex; align-items:center; gap:4px; margin-left:auto; flex-wrap:wrap;}
.nav a{color:#cbd5e1; text-decoration:none; font-weight:600; font-size:.9rem; padding:8px 13px; border-radius:9px; transition:background .12s,color .12s;}
.nav a:hover{background:rgba(255,255,255,.08); color:#fff;}
.nav a.active{background:var(--primary); color:#fff;}
.nav-spacer{flex:1;}
.nav-user{color:#94a3b8; font-size:.85rem; padding:0 6px;}
.nav-badge{background:#fde68a; color:#92400e; border-radius:6px; padding:1px 6px; font-size:.68rem; font-weight:800; text-transform:uppercase;}
.nav-logout{color:#fca5a5 !important;}
.nav-toggle{display:none; margin-left:auto; background:rgba(255,255,255,.1); color:#fff; border:none; font-size:1.2rem; border-radius:8px; padding:6px 11px; cursor:pointer;}
.site-main{padding:22px 16px 40px;}
.site-footer{padding:22px 16px 34px; text-align:center;}
.site-footer small{color:var(--muted); display:block;}
.site-credit{margin-top:8px; font-size:.9rem; color:var(--text) !important;}
.site-credit b{color:var(--primary);}

/* ── Cards / headings ── */
.card{background:var(--panel); border:1px solid var(--border); border-radius:var(--radius); box-shadow:var(--shadow); padding:clamp(18px,3vw,30px); margin:0 auto;}
.card h1{margin:0 0 12px; font-size:clamp(1.3rem,1.1rem+1.1vw,1.7rem); font-weight:800; letter-spacing:-.01em;}
.muted{color:var(--muted);}
.mt{margin-top:16px;} .mb{margin-bottom:16px;}

/* ── Buttons ── */
.btn{display:inline-flex; align-items:center; justify-content:center; gap:.45rem; padding:10px 18px; border:1px solid transparent; border-radius:12px;
  background:linear-gradient(180deg,#5b53ea,var(--primary)); color:#fff; font-weight:600; font-size:.9rem; font-family:inherit; cursor:pointer;
  text-decoration:none; white-space:nowrap; transition:filter .15s,box-shadow .18s,transform .06s; box-shadow:0 2px 5px rgba(79,70,229,.3);}
.btn:hover{filter:brightness(1.07); box-shadow:0 8px 20px -6px rgba(79,70,229,.55);}
.btn:active{transform:translateY(1px);}
.btn:disabled{opacity:.55; cursor:not-allowed; filter:none; box-shadow:none;}
.btn-small{padding:6px 12px; border-radius:9px; font-size:.82rem;}
.btn-secondary{background:#fff; color:#334155; border-color:#d6dce5; box-shadow:0 1px 2px rgba(15,23,42,.05);}
.btn-secondary:hover{background:#f4f6fa; filter:none;}
.btn-danger{background:#fef2f2; color:#dc2626; border-color:#fbcaca; box-shadow:none;}
.btn-danger:hover{background:#fee2e2; filter:none;}
.btn-indigo{background:var(--primary-soft); color:#3730a3; border-color:#d5dbfb; box-shadow:none;}
.btn-indigo:hover{background:#e0e7ff; filter:none;}
.btn-success{background:#ecfdf5; color:#047857; border-color:#a7f3d0; box-shadow:none;}
.btn-success:hover{background:#d1fae5; filter:none;}
.btn-outline{background:#fff; color:#374151; border-color:#d6dce5; box-shadow:none;}

/* ── Forms ── */
label{font-weight:600; color:#475569; font-size:.9rem;}
input[type=text],input[type=password],input[type=number],input[type=search],textarea,select{
  width:100%; padding:11px 14px; border:1px solid #d6dce5; border-radius:12px; background:#fff; color:var(--text);
  font-size:.95rem; font-family:inherit; outline:none; transition:border-color .15s,box-shadow .15s;}
input:focus,textarea:focus,select:focus{border-color:var(--primary); box-shadow:var(--ring);}
textarea{resize:vertical; min-height:80px; line-height:1.5;}
.field{display:grid; gap:6px; margin-bottom:14px;}

/* ── Flash / alerts ── */
.flash{padding:.7rem 1rem; border-radius:10px; font-size:.88rem; margin-bottom:16px; font-weight:600;}
.flash.success{background:#d1fae5; color:#065f46; border:1px solid #a7f3d0;}
.flash.error{background:#fee2e2; color:#991b1b; border:1px solid #fca5a5;}
.flash.info{background:#e0e7ff; color:#3730a3; border:1px solid #c7d2fe;}

/* ── Auth (login / setup) ── */
.auth-wrap{min-height:70vh; display:flex; align-items:center; justify-content:center;}
.auth-card{width:min(420px,96vw); background:var(--panel); border:1px solid var(--border); border-radius:var(--radius); box-shadow:var(--shadow); padding:28px 26px;}
.auth-card h1{font-size:1.4rem; margin:0 0 4px;}
.auth-logo{font-size:2.2rem; text-align:center; margin-bottom:6px;}

/* ── Tables (accounts) ── */
.tbl{width:100%; border-collapse:collapse; font-size:.9rem;}
.tbl th,.tbl td{text-align:left; padding:10px 12px; border-bottom:1px solid var(--border); vertical-align:middle;}
.tbl th{font-size:.74rem; text-transform:uppercase; letter-spacing:.04em; color:var(--muted);}
.tbl tr:hover td{background:#fafbff;}
.pill{display:inline-block; padding:2px 9px; border-radius:999px; font-size:.72rem; font-weight:800;}
.pill.admin{background:#fde68a; color:#92400e;} .pill.student{background:#e0e7ff; color:#3730a3;}
/* Group hierarchy tree (admin Groups tab) */
.grp-node{border:1px solid var(--border); border-radius:12px; padding:10px 14px; margin:8px 0; background:var(--panel); box-shadow:var(--shadow-sm);}
.grp-head{display:flex; align-items:center; gap:10px; flex-wrap:wrap;}
.grp-name{font-weight:800; color:var(--text); font-size:.98rem;}
.grp-meta{font-size:.78rem; color:var(--muted);}
.grp-acts{margin-left:auto; white-space:nowrap; display:flex; gap:6px; align-items:center;}
.grp-members{display:flex; flex-wrap:wrap; gap:6px; margin-top:9px; padding-left:6px;}
.grp-mem{display:inline-flex; align-items:center; gap:6px; font-size:.82rem; font-weight:600; color:var(--text);
  background:var(--panel2,#f4f6fa); border:1px solid var(--border); border-radius:999px; padding:3px 10px;}
.grp-mem-role{font-size:.68rem; font-weight:800; color:var(--primary); background:var(--primary-soft); border-radius:999px; padding:2px 8px; white-space:nowrap;}
/* Aligned People & Groups table */
.pg-table td, .pg-table th{vertical-align:middle;}
.pg-table th{white-space:nowrap;}
.pg-grow > td{background:var(--panel2,#f4f6fa); border-top:2px solid var(--border);}
.pg-caret{background:none; border:none; cursor:pointer; color:var(--muted); font-size:.8rem; padding:0 6px 0 0; line-height:1;}
.pg-caret:hover{color:var(--text);}
.pg-caret-sp{display:inline-block; width:18px;}
.pg-gname{font-weight:800; color:var(--text); font-size:.98rem;}
.pg-name{min-width:200px;}
.pg-email{font-size:.82rem; word-break:break-all;}
.pg-login{font-size:.8rem; white-space:nowrap;}
.pg-acts{text-align:right; white-space:nowrap;}
.pg-acts .btn{padding:3px 9px; margin-left:3px;}
.pg-tools{display:flex; margin:2px 0 12px; background:var(--panel2,#f4f6fa); border:1px solid var(--border); border-radius:12px; overflow:hidden; flex-wrap:wrap;}
.pg-tool{flex:1 1 260px; padding:13px 16px; min-width:0;}
.pg-tool + .pg-tool{border-left:1px solid var(--border);}
.pg-tool-h{font-weight:800; font-size:.72rem; text-transform:uppercase; letter-spacing:.05em; color:var(--muted); margin-bottom:10px;}
.pg-tool-body{display:flex; gap:8px; align-items:center; flex-wrap:wrap;}
.pg-tool-body select{max-width:230px; padding:7px 10px; border:1px solid var(--border); border-radius:9px; background:var(--panel); color:var(--text); font-size:.88rem;}
[data-theme="dark"] .pg-tools{background:var(--panel2);}
@media (max-width:560px){ .pg-tool + .pg-tool{border-left:none; border-top:1px solid var(--border);} }
.pg-search{display:flex; gap:6px; align-items:center;}
.pg-search input[type=search]{padding:7px 11px; border:1px solid var(--border); border-radius:9px; background:var(--panel); color:var(--text); min-width:230px; font-size:.88rem;}
[data-theme="dark"] .pg-grow > td{background:var(--panel2);}

/* Sign in with Google */
.auth-or{display:flex; align-items:center; gap:10px; margin:16px 0; color:var(--muted); font-size:.8rem;}
.auth-or::before, .auth-or::after{content:""; flex:1; height:1px; background:var(--border);}
.google-btn{display:flex; align-items:center; justify-content:center; gap:10px; width:100%; padding:10px 14px;
  border:1px solid var(--border); border-radius:10px; background:var(--panel); color:var(--text); text-decoration:none;
  font-weight:700; font-size:.92rem; transition:background .12s, box-shadow .12s;}
.google-btn:hover{background:var(--panel2,#f4f6fa); box-shadow:var(--shadow-sm);}
[data-theme="dark"] .grp-mem{background:var(--panel2);}
[data-theme="dark"] .grp-mem-role{color:#c7d2fe;}

/* Permission / group checkbox grids + permission badges (admin control area) */
.perm-grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(200px,1fr)); gap:6px 14px; margin:4px 0 6px;}
.perm-check{display:flex; align-items:center; gap:8px; font-size:.88rem; font-weight:600; color:var(--text); padding:5px 0;}
.perm-check input{width:auto; flex:0 0 auto;}
.perm-check.disabled{opacity:.45;}
.perm-badge{display:inline-block; margin:2px 4px 2px 0; padding:2px 8px; border-radius:7px; font-size:.7rem; font-weight:700;
  background:var(--primary-soft); color:#3730a3; border:1px solid #d5dbfb;}
[data-theme="dark"] .pill.admin{background:#4a3a12; color:#fde68a;}
[data-theme="dark"] .pill.student{background:#252d4d; color:#c7d2fe;}
[data-theme="dark"] .perm-badge{background:var(--primary-soft); color:#c7d2fe; border-color:#333c5e;}
[data-theme="dark"] .tbl tr:hover td{background:#1a2236;}

/* ===========================================================================
   Study module (dashboard / flashcards / tests)
   =========================================================================== */
.sm-hero-sub{color:var(--muted); font-size:.95rem; margin:.35rem 0 0; max-width:72ch;}
.sm-actions{display:grid; grid-template-columns:repeat(auto-fit,minmax(210px,1fr)); gap:14px; margin:18px 0 4px;}
.sm-cta{display:flex; flex-direction:column; gap:.3rem; padding:18px; border-radius:14px; text-decoration:none; border:1px solid var(--border);
  background:var(--panel); box-shadow:var(--shadow-sm); transition:transform .1s,box-shadow .15s,border-color .15s; min-width:0;}
.sm-cta:hover{transform:translateY(-2px); box-shadow:var(--shadow); border-color:#c9d0fb;}
.sm-cta .ico{font-size:1.5rem;} .sm-cta .t{font-weight:750; color:var(--text); font-size:1.02rem;} .sm-cta .d{font-size:.83rem; color:var(--muted);}
.sm-cta.primary{background:linear-gradient(160deg,#eef2ff,#f7f8ff); border-color:#d5dbfb;}
.sm-cta.mock{background:linear-gradient(160deg,#fff7ed,#fffaf5); border-color:#fbd8ac;}
.sm-stats{display:grid; grid-template-columns:repeat(auto-fit,minmax(150px,1fr)); gap:12px; margin:20px 0;}
.sm-stat{background:var(--panel); border:1px solid var(--border); border-radius:14px; padding:14px 16px; box-shadow:var(--shadow-sm); min-width:0;}
.sm-stat .lbl{font-size:.74rem; font-weight:700; text-transform:uppercase; letter-spacing:.04em; color:var(--muted);}
.sm-stat .num{font-size:1.9rem; font-weight:800; letter-spacing:-.02em; line-height:1.15; margin-top:2px;}
.sm-stat .num small{font-size:.9rem; font-weight:600; color:var(--muted);}
.sm-secgrid{display:grid; gap:12px;}
.sm-sec{display:grid; grid-template-columns:1fr auto; gap:12px 18px; align-items:center; background:var(--panel); border:1px solid var(--border); border-radius:14px; padding:14px 16px; box-shadow:var(--shadow-sm); min-width:0;}
.sm-sec-main{min-width:0;}
.sm-sec-head{display:flex; align-items:baseline; gap:.5rem; flex-wrap:wrap;}
.sm-sec-code{font-size:.72rem; font-weight:800; color:#fff; background:var(--primary); border-radius:6px; padding:2px 7px;}
.sm-sec-title{font-weight:700; font-size:.98rem;}
.sm-bar{height:9px; border-radius:999px; background:#eef1f6; overflow:hidden; margin:9px 0 6px;}
.sm-bar > i{display:block; height:100%; border-radius:999px; background:linear-gradient(90deg,#6366f1,#7c3aed); transition:width .4s ease;}
.sm-bar.acc > i{background:linear-gradient(90deg,#10b981,#059669);}
.sm-sec-meta{display:flex; flex-wrap:wrap; gap:.35rem 1rem; font-size:.8rem; color:var(--muted);}
.sm-sec-meta b{color:var(--text);}
.sm-sec-actions{display:flex; gap:8px; flex-shrink:0; align-items:center;}
.sm-badge{display:inline-flex; align-items:center; gap:.3rem; padding:3px 10px; border-radius:999px; font-size:.75rem; font-weight:800;}
.sm-badge.pass{background:#d1fae5; color:#065f46;} .sm-badge.fail{background:#fee2e2; color:#b91c1c;}
.sm-history{display:grid; gap:8px;}
.sm-hrow{display:flex; align-items:center; justify-content:space-between; gap:12px; padding:10px 14px; border:1px solid var(--border); border-radius:11px; background:#fafbff; min-width:0; text-decoration:none; color:inherit;}
.sm-hrow .h-title{font-weight:700; font-size:.9rem; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;}
.sm-hrow .h-sub{font-size:.76rem; color:var(--muted);}
.sm-hrow .h-score{font-weight:800; font-size:1.05rem; white-space:nowrap;}
.sm-empty{text-align:center; color:var(--muted); padding:26px 14px; border:1px dashed #d6dce5; border-radius:14px; background:#fbfcff;}

/* Flashcards */
.fc-toolbar{display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap; margin-bottom:12px;}
.fc-counter{font-weight:700; color:var(--muted); font-size:.9rem;}
.fc-progress{height:8px; border-radius:999px; background:#eef1f6; overflow:hidden; margin-bottom:16px;}
.fc-progress > i{display:block; height:100%; background:linear-gradient(90deg,#6366f1,#7c3aed); width:0; transition:width .3s;}
.fc-stage{perspective:1600px;}
.fc-card{position:relative; width:100%; min-height:300px; cursor:pointer; transform-style:preserve-3d; transition:transform .5s cubic-bezier(.2,.7,.2,1);}
.fc-card.flipped{transform:rotateY(180deg);}
.fc-face{position:absolute; inset:0; backface-visibility:hidden; -webkit-backface-visibility:hidden; display:flex; flex-direction:column; align-items:center; justify-content:center; text-align:center; padding:30px 26px; border-radius:18px; border:1px solid var(--border); background:var(--panel); box-shadow:var(--shadow); overflow:auto;}
.fc-face .fc-kicker{position:absolute; top:14px; left:16px; font-size:.72rem; font-weight:800; color:var(--primary); letter-spacing:.03em; text-transform:uppercase;}
.fc-face .fc-fliphint{position:absolute; bottom:12px; right:16px; font-size:.72rem; color:#aeb6c4;}
.fc-front{font-size:1.25rem; font-weight:650; line-height:1.5;}
.fc-back{transform:rotateY(180deg);}
.fc-back .fc-answer{font-size:1.08rem; line-height:1.6;}
.fc-hint{margin-top:14px; font-size:.85rem; color:var(--muted); font-style:italic;}
.fc-controls{display:flex; gap:12px; justify-content:center; margin-top:18px; flex-wrap:wrap;}
.fc-controls .btn{min-width:150px;}
.fc-flipbtn{display:flex; justify-content:center; margin-top:18px;}
.fc-done{text-align:center; padding:26px 16px;} .fc-done .big{font-size:2.4rem; font-weight:800;}

/* Quiz / test */
.qz-seclist{display:grid; grid-template-columns:repeat(auto-fill,minmax(230px,1fr)); gap:8px; margin-top:6px;}
.qz-seccheck{display:flex; align-items:center; gap:.5rem; padding:9px 12px; border:1px solid var(--border); border-radius:10px; background:#fafbff; cursor:pointer; font-size:.86rem;}
.qz-seccheck:hover{border-color:#c9d0fb; background:var(--primary-soft);}
.qz-seccheck input{width:auto;}
.qz-timer{font-weight:800; font-variant-numeric:tabular-nums; padding:6px 12px; border-radius:10px; background:#eef2ff; color:#3730a3;}
.qz-timer.warn{background:#fef3c7; color:#92400e;} .qz-timer.danger{background:#fee2e2; color:#b91c1c;}
.qz-topbar{display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap; margin-bottom:14px; position:sticky; top:60px; background:var(--panel); padding:8px 0; z-index:5;}
.qz-question{border:1px solid var(--border); border-radius:14px; padding:16px 18px; margin-bottom:14px; background:var(--panel); box-shadow:var(--shadow-sm);}
.qz-qnum{font-size:.74rem; font-weight:800; color:var(--primary); text-transform:uppercase; letter-spacing:.03em;}
.qz-stem{font-size:1.05rem; font-weight:650; margin:.35rem 0 12px; line-height:1.5;}
.qz-choices{display:grid; gap:9px;}
.qz-choice{display:flex; align-items:flex-start; gap:.6rem; padding:11px 14px; border:1.5px solid var(--border); border-radius:11px; cursor:pointer; transition:border-color .12s,background .12s; background:#fff;}
.qz-choice:hover{border-color:#c9d0fb; background:var(--primary-soft);}
.qz-choice input{width:auto; margin-top:3px; flex-shrink:0;}
.qz-choice .lab{font-size:.94rem; line-height:1.45;}
.qz-choice.sel{border-color:var(--primary); background:var(--primary-soft);}
.qz-choice.correct{border-color:#10b981; background:#ecfdf5;}
.qz-choice.wrong{border-color:#ef4444; background:#fef2f2;}
.qz-choice .mark{margin-left:auto; font-weight:800; flex-shrink:0;}
.qz-choice.correct .mark{color:#059669;} .qz-choice.wrong .mark{color:#dc2626;}
.qz-explain{margin-top:12px; padding:11px 14px; border-left:3px solid var(--primary); background:#f7f8ff; border-radius:0 10px 10px 0; font-size:.88rem; color:#475569; line-height:1.55;}
.qz-explain b{color:var(--text);}
.qz-actions{display:flex; gap:12px; flex-wrap:wrap; margin-top:6px;}
.qz-result{text-align:center; padding:8px 6px 6px;}
.qz-scorenum{font-size:3.2rem; font-weight:850; letter-spacing:-.03em; line-height:1;}
.qz-scorenum.pass{color:#059669;} .qz-scorenum.fail{color:#dc2626;}
.qz-scoresub{color:var(--muted); font-weight:600; margin-top:4px;}
.qz-scorebar{height:14px; border-radius:999px; background:#eef1f6; overflow:hidden; max-width:520px; margin:16px auto 6px; position:relative;}
.qz-scorebar > i{display:block; height:100%; border-radius:999px;}
.qz-scorebar > i.pass{background:linear-gradient(90deg,#10b981,#059669);} .qz-scorebar > i.fail{background:linear-gradient(90deg,#f59e0b,#ef4444);}
.qz-threshline{position:absolute; top:-3px; bottom:-3px; width:2px; background:#334155;}
.qz-secbreak{display:grid; gap:8px; max-width:640px; margin:16px auto 0; text-align:left;}

/* Admin */
.as-tools{display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:14px; margin-bottom:20px;}
.as-panel{border:1px solid var(--border); border-radius:14px; padding:14px 16px; background:#fafbff;}
.as-panel h3{margin:0 0 8px; font-size:.95rem;}
.as-row{display:flex; align-items:center; gap:10px; flex-wrap:wrap;}
.as-item{border:1px solid var(--border); border-radius:11px; padding:11px 14px; margin-bottom:8px; background:var(--panel);}
.as-item .top{display:flex; gap:10px; align-items:flex-start; justify-content:space-between;}
.as-item .txt{min-width:0;} .as-item .ttl{font-weight:650; font-size:.94rem;} .as-item .sub{font-size:.82rem; color:var(--muted); margin-top:3px;}
.as-item .acts{display:flex; gap:6px; flex-shrink:0;}
.as-choicelist{margin:6px 0 0; padding-left:18px; font-size:.83rem; color:#475569;}
.as-choicelist li.ok{color:#059669; font-weight:700;}
.as-inactive{opacity:.55;}
.subtabs{display:flex; gap:6px; border-bottom:1px solid var(--border); margin-bottom:18px; flex-wrap:wrap;}
.subtabs a{padding:9px 15px; border-radius:10px 10px 0 0; font-weight:600; font-size:.9rem; color:var(--muted); text-decoration:none; border:1px solid transparent; border-bottom:none;}
.subtabs a.active{color:var(--primary-hover); background:var(--panel); border-color:var(--border);}
dialog.as-modal{border:none; border-radius:14px; padding:0; box-shadow:0 20px 60px rgba(0,0,0,.2); width:min(680px,96vw);}
dialog.as-modal::backdrop{background:rgba(0,0,0,.45);}
.as-modal-head{display:flex; justify-content:space-between; align-items:center; padding:14px 18px; border-bottom:1px solid var(--border);}
.as-modal-head h3{margin:0; font-size:1rem;}
.as-modal-body{padding:16px 18px; max-height:70vh; overflow:auto;}
.as-modal-body label{display:block; font-weight:600; font-size:.84rem; margin:10px 0 4px;}
.as-modal-foot{padding:12px 18px; border-top:1px solid var(--border); display:flex; justify-content:flex-end; gap:8px;}
.as-choice-row{display:flex; align-items:center; gap:8px; margin-bottom:6px;}
.as-choice-row input[type=text]{flex:1;}
.x-close{background:none; border:none; font-size:1.3rem; cursor:pointer; color:#9ca3af;}

@media (max-width:720px){
  .nav{display:none; width:100%; flex-direction:column; align-items:stretch; gap:2px; margin-top:8px;}
  .nav.open{display:flex;}
  .nav-toggle{display:inline-block;}
  .nav-spacer{display:none;} .nav-user{padding:8px 13px;}
  .sm-sec{grid-template-columns:1fr;} .sm-sec-actions{justify-content:flex-start;}
  .qz-topbar{top:0;}
  .as-cols{grid-template-columns:1fr !important;}
  .qz-scorenum{font-size:2.6rem;}
}

/* ── Theme toggle button ── */
.theme-toggle{margin-left:auto; background:rgba(255,255,255,.12); color:#fff; border:none; width:38px; height:38px; border-radius:9px; cursor:pointer; font-size:1.05rem; line-height:1; display:inline-flex; align-items:center; justify-content:center; flex-shrink:0;}
.theme-toggle:hover{background:rgba(255,255,255,.24);}

/* ── Focus areas panel ── */
.focus-panel{border:1px solid var(--border); border-radius:16px; padding:16px 18px; background:linear-gradient(160deg,var(--primary-soft),var(--panel)); margin:20px 0; box-shadow:var(--shadow-sm);}
.focus-head{display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap; margin-bottom:12px;}
.focus-head h2{margin:0; font-size:1.05rem;}
.focus-actions{display:flex; gap:8px; flex-wrap:wrap;}
.focus-tag{display:inline-block; font-size:.68rem; font-weight:800; text-transform:uppercase; letter-spacing:.03em; color:#b45309; background:#fef3c7; border-radius:6px; padding:1px 7px; margin-left:6px;}

/* ===========================================================================
   Dark theme
   =========================================================================== */
:root[data-theme="dark"]{
  --bg:#0b1120; --panel:#141c2e; --text:#e6eaf3; --muted:#98a3b8;
  --header:#0a0f1c; --header2:#0e1524;
  --primary:#6366f1; --primary-hover:#818cf8; --primary-soft:#1e2540;
  --accent:#a78bfa; --border:#27314c;
  --shadow-sm:0 1px 2px rgba(0,0,0,.5);
  --shadow:0 12px 34px -14px rgba(0,0,0,.7),0 2px 8px -3px rgba(0,0,0,.5);
  --ring:0 0 0 3px rgba(99,102,241,.4);
  --panel2:#1b2438; --track:#242f49; --input-bg:#0f1626;
}
:root[data-theme="dark"] body{
  background-image:radial-gradient(1100px 560px at 82% -8%,rgba(99,102,241,.12),transparent 60%),
                   radial-gradient(950px 480px at -8% 8%,rgba(124,58,237,.10),transparent 55%);
}
/* Buttons */
[data-theme="dark"] .btn-secondary{background:var(--panel2); color:var(--text); border-color:var(--border);}
[data-theme="dark"] .btn-secondary:hover{background:#222c44;}
[data-theme="dark"] .btn-outline{background:var(--panel2); color:var(--text); border-color:var(--border);}
[data-theme="dark"] .btn-outline:hover{background:#222c44;}
[data-theme="dark"] .btn-indigo{background:var(--primary-soft); color:#c7d2fe; border-color:#333c5e;}
[data-theme="dark"] .btn-indigo:hover{background:#252d4d;}
[data-theme="dark"] .btn-danger{background:#3a1620; color:#fca5a5; border-color:#5b2530;}
[data-theme="dark"] .btn-danger:hover{background:#4a1b28;}
[data-theme="dark"] .btn-success{background:#0e2c20; color:#6ee7b7; border-color:#14532d;}
[data-theme="dark"] .btn-success:hover{background:#123a2a;}
/* Forms */
[data-theme="dark"] input[type=text],[data-theme="dark"] input[type=password],[data-theme="dark"] input[type=number],[data-theme="dark"] input[type=search],[data-theme="dark"] textarea,[data-theme="dark"] select{background:var(--input-bg); color:var(--text); border-color:var(--border);}
[data-theme="dark"] ::placeholder{color:#6b7690;}
/* Flash */
[data-theme="dark"] .flash.success{background:#0e2c20; color:#86efac; border-color:#14532d;}
[data-theme="dark"] .flash.error{background:#3a1620; color:#fca5a5; border-color:#5b2530;}
[data-theme="dark"] .flash.info{background:#1e2540; color:#c7d2fe; border-color:#333c5e;}
/* Tables + pills */
[data-theme="dark"] .tbl tr:hover td{background:var(--panel2);}
[data-theme="dark"] .pill.admin{background:#3a2e10; color:#fcd34d;}
[data-theme="dark"] .pill.student{background:#1e2540; color:#c7d2fe;}
/* Study surfaces */
[data-theme="dark"] .sm-bar,[data-theme="dark"] .fc-progress,[data-theme="dark"] .qz-scorebar{background:var(--track);}
[data-theme="dark"] .sm-hrow{background:var(--panel2);}
[data-theme="dark"] .sm-empty{background:var(--panel2); border-color:var(--border);}
[data-theme="dark"] .sm-cta.primary{background:linear-gradient(160deg,#1a2140,#151b2c); border-color:#333c5e;}
[data-theme="dark"] .sm-cta.mock{background:linear-gradient(160deg,#2a2114,#1a160f); border-color:#4a3a1f;}
[data-theme="dark"] .sm-badge.pass{background:#0e2c20; color:#6ee7b7;}
[data-theme="dark"] .sm-badge.fail{background:#3a1620; color:#fca5a5;}
[data-theme="dark"] .focus-tag{background:#3a2e10; color:#fcd34d;}
/* Quiz */
[data-theme="dark"] .qz-choice{background:var(--panel); border-color:var(--border);}
[data-theme="dark"] .qz-choice:hover{background:var(--primary-soft);}
[data-theme="dark"] .qz-choice.sel{background:var(--primary-soft); border-color:var(--primary);}
[data-theme="dark"] .qz-choice.correct{background:#0e2c20; border-color:#1c7a4f;}
[data-theme="dark"] .qz-choice.wrong{background:#3a1620; border-color:#a13a45;}
[data-theme="dark"] .qz-explain{background:var(--panel2); color:#aab3c6;}
[data-theme="dark"] .qz-seccheck{background:var(--panel2); border-color:var(--border);}
[data-theme="dark"] .qz-timer{background:#1e2540; color:#c7d2fe;}
[data-theme="dark"] .qz-timer.warn{background:#3a2e10; color:#fcd34d;}
[data-theme="dark"] .qz-timer.danger{background:#3a1620; color:#fca5a5;}
[data-theme="dark"] .qz-scorenum.pass{color:#34d399;} [data-theme="dark"] .qz-scorenum.fail{color:#f87171;}
/* Admin */
[data-theme="dark"] .as-panel{background:var(--panel2);}
[data-theme="dark"] dialog.as-modal{background:var(--panel); color:var(--text);}
[data-theme="dark"] .fc-face .fc-fliphint{color:#6b7690;}
[data-theme="dark"] .as-choicelist li.ok{color:#34d399;}

/* Instant-feedback practice tests: lock a question once answered (radios stay
   enabled so their value still submits; pointer-events blocks changing it). */
.qz-question.answered .qz-choices{ pointer-events:none; }
.qz-question.answered .qz-choice:not(.correct):not(.wrong){ opacity:.55; }

/* ===========================================================================
   Learn lessons (ELI5 + read-aloud narration)
   =========================================================================== */
.ln-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:14px; margin-top:18px; }
.ln-card{ display:flex; flex-direction:column; gap:6px; padding:16px; border:1px solid var(--border); border-radius:14px;
  background:var(--panel); box-shadow:var(--shadow-sm); text-decoration:none; color:inherit;
  transition:transform .1s, box-shadow .15s, border-color .15s; min-width:0; }
.ln-card:hover{ transform:translateY(-2px); box-shadow:var(--shadow); border-color:#c9d0fb; }
.ln-card-empty{ opacity:.6; }
.ln-card-code{ font-size:.72rem; font-weight:800; color:#fff; background:var(--primary); border-radius:6px; padding:2px 8px; align-self:flex-start; }
.ln-card-title{ font-weight:750; font-size:1rem; color:var(--text); }
.ln-card-eli5{ font-size:.85rem; color:var(--muted); line-height:1.45; flex:1; }
.ln-card-go{ font-size:.8rem; font-weight:700; color:var(--primary); margin-top:2px; }

.ln-controls{ display:flex; align-items:center; gap:10px; flex-wrap:wrap; margin:16px 0 6px; padding:12px 14px;
  background:var(--primary-soft); border:1px solid #d5dbfb; border-radius:12px; }
.ln-intro{ font-size:1.15rem; line-height:1.6; font-weight:600; color:var(--text); padding:16px 18px; margin:14px 0;
  background:linear-gradient(160deg,var(--primary-soft),var(--panel)); border:1px solid var(--border); border-radius:14px; transition:box-shadow .2s, background .2s; }
.ln-points{ display:flex; flex-direction:column; gap:12px; }
.ln-point{ display:flex; gap:14px; align-items:flex-start; padding:14px 16px; border:1px solid var(--border); border-radius:14px;
  background:var(--panel); box-shadow:var(--shadow-sm); cursor:pointer; transition:box-shadow .2s, border-color .2s, background .2s, transform .1s; }
.ln-point:hover{ border-color:#c9d0fb; }
.ln-ico{ font-size:1.7rem; line-height:1; flex-shrink:0; width:2rem; text-align:center; }
.ln-h{ font-weight:750; font-size:1.02rem; color:var(--text); margin-bottom:3px; }
.ln-t{ font-size:.95rem; line-height:1.6; color:var(--text); }
.ln-recap{ margin-top:16px; padding:14px 16px; border-left:4px solid var(--primary); background:#f7f8ff; border-radius:0 12px 12px 0; font-size:1rem; line-height:1.6; }
/* Highlight the piece being read aloud */
.ln-point.speaking, .ln-intro.speaking, .ln-recap.speaking{
  border-color:var(--primary); background:var(--primary-soft);
  box-shadow:0 0 0 3px rgba(79,70,229,.22); transform:none; }
.ln-recap.speaking{ background:var(--primary-soft); }

/* Dark theme tweaks for Learn */
[data-theme="dark"] .ln-controls{ background:var(--panel2); border-color:var(--border); }
[data-theme="dark"] .ln-intro{ background:linear-gradient(160deg,var(--primary-soft),var(--panel)); }
[data-theme="dark"] .ln-recap{ background:var(--panel2); }
[data-theme="dark"] .ln-point.speaking, [data-theme="dark"] .ln-intro.speaking, [data-theme="dark"] .ln-recap.speaking{
  background:var(--primary-soft); box-shadow:0 0 0 3px rgba(99,102,241,.4); }

/* Learn — diagrams gallery + quick-facts cheat sheet */
.ln-sec-h{ font-size:1.05rem; margin:22px 0 10px; }
.ln-figs{ display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:14px; }
.ln-fig{ margin:0; padding:14px; border:1px solid var(--border); border-radius:14px; background:var(--panel); box-shadow:var(--shadow-sm); }
.ln-fig-title{ font-weight:750; font-size:.92rem; color:var(--text); margin-bottom:8px; }
.ln-fig-svg{ display:flex; justify-content:center; color:var(--text); }
/* SVG line art uses currentColor for strokes/labels so it flips with the theme */
.ln-fig-svg svg{ width:100%; height:auto; max-width:420px; max-height:280px; }
.ln-fig-cap{ font-size:.83rem; color:var(--muted); line-height:1.5; margin-top:8px; }
.ln-facts{ list-style:none; padding:0; margin:0; display:grid; gap:8px; }
.ln-facts li{ padding:10px 14px 10px 34px; position:relative; border:1px solid var(--border); border-radius:11px; background:var(--panel2,#fafbff); font-size:.9rem; line-height:1.5; }
.ln-facts li::before{ content:"✓"; position:absolute; left:12px; top:10px; color:#059669; font-weight:800; }
[data-theme="dark"] .ln-facts li{ background:var(--panel2); }
[data-theme="dark"] .ln-facts li::before{ color:#34d399; }

/* Learn — guided course: progress bar + modules */
.ln-progress{ display:flex; align-items:center; gap:16px; flex-wrap:wrap; padding:16px 18px; margin:14px 0 6px;
  background:linear-gradient(150deg,var(--primary-soft),var(--panel)); border:1px solid #d5dbfb; border-radius:14px; }
.ln-prog-main{ flex:1; min-width:220px; }
.ln-prog-top{ font-size:.95rem; color:var(--text); }
.ln-module{ margin-top:22px; }
.ln-mod-head{ display:flex; align-items:center; gap:12px; padding-bottom:4px; border-bottom:1px solid var(--border); margin-bottom:2px; }
.ln-mod-ico{ font-size:1.6rem; line-height:1; flex-shrink:0; }
.ln-mod-name{ font-weight:800; font-size:1.05rem; color:var(--text); }
.ln-mod-blurb{ font-size:.83rem; color:var(--muted); line-height:1.4; }
.ln-mod-count{ margin-left:auto; flex-shrink:0; font-size:.8rem; font-weight:800; color:var(--muted);
  background:var(--panel2,#f4f6fa); border:1px solid var(--border); border-radius:999px; padding:3px 11px; }
.ln-mod-count.done{ color:#047857; background:#ecfdf5; border-color:#a7f3d0; }
.ln-card.ln-done{ border-color:#a7f3d0; background:linear-gradient(160deg,#f0fdf9,var(--panel)); }
.ln-card.ln-done .ln-card-code{ background:#059669; }
.ln-card.ln-done .ln-card-go{ color:#047857; }
.ln-check{ font-weight:900; }
[data-theme="dark"] .ln-progress{ background:var(--panel2); border-color:var(--border); }
[data-theme="dark"] .ln-mod-count.done{ color:#6ee7b7; background:#0e2c20; border-color:#14532d; }
[data-theme="dark"] .ln-card.ln-done{ border-color:#14532d; background:linear-gradient(160deg,#0e2c20,var(--panel)); }
[data-theme="dark"] .ln-card.ln-done .ln-card-go{ color:#6ee7b7; }

/* Learn — lesson completion bar */
.ln-done-bar{ display:flex; align-items:center; gap:12px; flex-wrap:wrap; margin-top:22px; padding:14px 16px;
  border:1px dashed var(--border); border-radius:12px; background:var(--panel2,#fafbff); }
.ln-done-bar .btn-success{ font-weight:750; }

/* Learn — interactive tools */
.tool{ border:1px solid var(--border); border-radius:14px; padding:16px 18px; background:var(--panel); box-shadow:var(--shadow-sm); }
.tool-title{ font-weight:800; font-size:1rem; color:var(--text); }
.tool-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(140px,1fr)); gap:12px; margin:6px 0 12px; }
.tool-grid label{ display:flex; flex-direction:column; gap:5px; font-size:.8rem; font-weight:700; color:var(--muted); }
.tool-grid input, .tool-grid select, .tool input[type=text]{ padding:9px 11px; border:1px solid var(--border); border-radius:10px;
  background:var(--panel); color:var(--text); font-size:.95rem; }
.tool input[type=text]{ width:100%; max-width:340px; }
.tool-actions{ display:flex; gap:8px; flex-wrap:wrap; }
.tool-out{ margin-top:12px; font-size:1.05rem; color:var(--text); min-height:1.4em; padding:2px 0; }
.tool-out b{ color:var(--primary); }
.tool-err{ color:#b91c1c; font-size:.9rem; font-weight:600; }
.rc-viz svg{ width:100%; max-width:300px; height:auto; }
[data-theme="dark"] .tool-err{ color:#fca5a5; }
[data-theme="dark"] .ln-done-bar{ background:var(--panel2); }

/* Learn — "go deeper" enrichment blocks */
.ln-deep{ border:1px solid var(--border); border-radius:12px; padding:12px 16px; margin:10px 0; background:var(--panel); box-shadow:var(--shadow-sm); }
.ln-deep-h{ font-weight:800; font-size:.92rem; margin-bottom:5px; }
.ln-deep-b{ font-size:.95rem; line-height:1.65; color:var(--text); }
.ln-deep.ex{ border-left:4px solid #6366f1; }
.ln-deep.mn{ border-left:4px solid #0ea5e9; }
.ln-deep.pf{ border-left:4px solid #f59e0b; background:#fffbeb; }
[data-theme="dark"] .ln-deep.pf{ background:#2a2413; }

/* Account area */
.nav-user{cursor:pointer;}
.acct-head{display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap; padding:16px 18px; margin:6px 0 18px;
  background:linear-gradient(150deg,var(--primary-soft),var(--panel)); border:1px solid #d5dbfb; border-radius:14px;}
.acct-name{font-size:1.3rem; font-weight:800; color:var(--text);}
.acct-overall{text-align:right;}
.acct-overall-num{font-size:2rem; font-weight:900; color:var(--primary); line-height:1;}
.acct-h2{font-size:1.05rem; margin:22px 0 12px;}
.acct-grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:14px;}
.acct-exam{display:block; text-decoration:none; color:inherit; border:1px solid var(--border); border-radius:14px; padding:14px 16px;
  background:var(--panel); box-shadow:var(--shadow-sm); transition:transform .1s, box-shadow .15s, border-color .15s;}
.acct-exam:hover{transform:translateY(-2px); box-shadow:var(--shadow); border-color:#c9d0fb;}
.acct-exam-top{display:flex; justify-content:space-between; align-items:baseline; gap:8px;}
.acct-exam-name{font-weight:750; color:var(--text);}
.acct-exam-pct{font-weight:900; color:var(--primary);}
.acct-exam-stats{display:flex; flex-wrap:wrap; gap:4px 14px; font-size:.8rem; color:var(--muted); margin-top:8px;}
.acct-exam-stats b{color:var(--text);}
.acct-settings{display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:18px;}
.acct-form{border:1px solid var(--border); border-radius:14px; padding:16px 18px; background:var(--panel); box-shadow:var(--shadow-sm);}
.acct-form h3{margin:0 0 10px; font-size:1rem;}
.acct-form label{display:block; font-size:.8rem; font-weight:700; color:var(--muted); margin:8px 0 4px;}
.acct-form input{width:100%; padding:9px 11px; border:1px solid var(--border); border-radius:10px; background:var(--panel); color:var(--text); margin-bottom:4px;}
.acct-form button{margin-top:10px;}
[data-theme="dark"] .acct-head{background:var(--panel2); border-color:var(--border);}

/* Concept Drills */
.dr-groupbar{ display:flex; gap:8px; flex-wrap:wrap; margin:14px 0 16px; }
.dr-gpill{ border:1px solid var(--border); background:var(--panel2,#f4f6fa); color:var(--muted); border-radius:999px;
  padding:6px 14px; font-size:.82rem; font-weight:700; cursor:pointer; transition:all .12s; }
.dr-gpill:hover{ border-color:#c9d0fb; color:var(--text); }
.dr-gpill.active{ background:var(--primary); border-color:var(--primary); color:#fff; }
.dr-card{ border:1px solid var(--border); border-radius:16px; padding:20px 22px; background:var(--panel); box-shadow:var(--shadow-sm); }
.dr-top{ display:flex; justify-content:space-between; align-items:center; gap:10px; flex-wrap:wrap; }
.dr-cat{ font-size:.76rem; font-weight:800; text-transform:uppercase; letter-spacing:.05em; color:var(--primary);
  background:var(--primary-soft); border-radius:999px; padding:3px 12px; }
.dr-streak{ font-size:.82rem; font-weight:700; color:var(--muted); }
.dr-prompt{ font-size:1.2rem; line-height:1.6; color:var(--text); margin:16px 0 18px; }
.dr-answer{ display:flex; gap:8px; align-items:center; flex-wrap:wrap; }
.dr-answer input{ font-size:1.1rem; padding:10px 12px; border:1px solid var(--border); border-radius:10px; background:var(--panel);
  color:var(--text); max-width:180px; font-weight:600; }
.dr-unit{ font-size:.9rem; color:var(--muted); font-weight:700; margin-right:6px; }
.dr-hintwrap{ display:block; margin-top:12px; font-size:.85rem; }
.dr-hintbtn{ background:none; border:none; color:var(--primary); font-weight:700; cursor:pointer; padding:0; font-size:.85rem; text-decoration:underline; }
.dr-hint{ color:var(--muted); margin-left:6px; }
.dr-result{ margin-top:16px; padding:12px 14px; border-radius:12px; font-size:1.02rem; }
.dr-result.ok{ background:#ecfdf5; color:#047857; border:1px solid #a7f3d0; }
.dr-result.no{ background:#fef2f2; color:#b91c1c; border:1px solid #fecaca; }
.dr-steps{ margin-top:10px; padding:12px 14px; border-left:4px solid var(--primary); background:var(--panel2,#f7f8ff);
  border-radius:0 12px 12px 0; font-size:.95rem; line-height:1.7; color:var(--text); }
[data-theme="dark"] .dr-result.ok{ background:#0e2c20; color:#6ee7b7; border-color:#14532d; }
[data-theme="dark"] .dr-result.no{ background:#3a1414; color:#fca5a5; border-color:#7f1d1d; }
[data-theme="dark"] .dr-steps{ background:var(--panel2); }

/* Formula Sheet guide */
.fm-list{ display:grid; gap:12px; }
.fm-card{ border:1px solid var(--border); border-radius:14px; padding:14px 16px; background:var(--panel); box-shadow:var(--shadow-sm); cursor:pointer; transition:box-shadow .2s,border-color .2s,background .2s; }
.fm-card:hover{ border-color:#c9d0fb; }
.fm-card.speaking{ border-color:var(--primary); background:var(--primary-soft); box-shadow:0 0 0 3px rgba(79,70,229,.22); }
.fm-top{ display:flex; align-items:baseline; justify-content:space-between; gap:12px; flex-wrap:wrap; margin-bottom:6px; }
.fm-name{ font-weight:750; font-size:1rem; color:var(--text); }
.fm-formula{ font-family:ui-monospace,"Cascadia Code",Consolas,monospace; font-size:1.02rem; font-weight:700; color:var(--primary-hover); background:var(--primary-soft); padding:5px 12px; border-radius:9px; }
[data-theme="dark"] .fm-formula{ color:#c7d2fe; }
.fm-what{ font-size:.92rem; color:var(--text); line-height:1.55; margin-bottom:10px; }
.fm-grid{ display:grid; grid-template-columns:1fr 1fr; gap:12px; }
.fm-block{ background:var(--panel2,#fafbff); border:1px solid var(--border); border-radius:10px; padding:9px 12px; }
[data-theme="dark"] .fm-block{ background:var(--panel2); }
.fm-lbl{ font-size:.7rem; font-weight:800; text-transform:uppercase; letter-spacing:.04em; color:var(--muted); margin-bottom:4px; }
.fm-vars{ margin:0; padding-left:16px; font-size:.86rem; line-height:1.55; }
.fm-block p{ margin:0; font-size:.88rem; line-height:1.5; }
.fm-ex{ margin-top:10px; font-size:.88rem; background:#f0fdf4; border-left:3px solid #22c55e; border-radius:0 8px 8px 0; padding:8px 12px; line-height:1.5; }
[data-theme="dark"] .fm-ex{ background:#0e2c20; }
.fm-ex-lbl{ font-weight:800; color:#059669; text-transform:uppercase; font-size:.72rem; letter-spacing:.03em; }
[data-theme="dark"] .fm-ex-lbl{ color:#34d399; }
@media (max-width:640px){ .fm-grid{ grid-template-columns:1fr; } }