/* ==========================================================================
   QuizCast — design token layer
   --------------------------------------------------------------------------
   Loaded by index.html, the public/student/teacher guide pages and teacher.html. student.html keeps
   plain style.css untouched, so nothing here can affect a live exam session.
   Load order is style.css → theme.css: this file refines, it does not replace.

   Token naming follows the shadcn/ui convention (surface / fg / muted /
   border / ring + a radius and elevation scale) so the visual grammar is
   consistent, but everything is plain CSS custom properties — no Tailwind,
   no build step.
   ========================================================================== */

/* ==========================================================================
   Typefaces — vendored woff2 rather than CDN-loaded: no third-party request on
   page load, and no dependency on an external host staying up. Both are SIL OFL
   (licences alongside the files).
     Instrument Serif — display only (h1/h2). High-contrast editorial serif.
     Geist            — UI/body. Variable weight, one file covers 100..900.
   `swap` so text paints immediately in the fallback and never blocks a join.
   ========================================================================== */
@font-face{
  font-family:"Instrument Serif"; font-style:normal; font-weight:400; font-display:swap;
  src:url("/vendor/fonts/instrument-serif-latin-400-normal.woff2") format("woff2");
}
@font-face{
  font-family:"Instrument Serif"; font-style:italic; font-weight:400; font-display:swap;
  src:url("/vendor/fonts/instrument-serif-latin-400-italic.woff2") format("woff2");
}
@font-face{
  font-family:"Geist"; font-style:normal; font-weight:100 900; font-display:swap;
  src:url("/vendor/fonts/geist-latin-wght-normal.woff2") format("woff2-variations"),
      url("/vendor/fonts/geist-latin-wght-normal.woff2") format("woff2");
}

:root{
  /* -- Editorial Luxury palette -------------------------------------------
     Warm cream paper against espresso ink, with a muted sage accent. The
     saturated brand green survives only as a "signal" colour (live badges,
     primary CTA) so it reads as information rather than decoration. */
  --paper:#FDFBF7;
  --paper-2:#F7F3EB;
  --paper-3:#EFEAE0;
  --ink:#1A1815;
  --ink-2:#3D3831;
  --ink-muted:#6B655C;
  --ink-subtle:#9A9288;
  --sage-deep:#2F4A3A;
  --sage:#4C6B58;
  --sage-pale:#E7EDE7;
  --signal:#107C41;          /* reserved: live state + primary action only */
  --signal-deep:#0B5A2F;

  /* Warm tinted hairlines — never a neutral grey border. */
  --hair:rgba(26,24,21,.09);
  --hair-strong:rgba(26,24,21,.16);

  /* Diffused ambient shadows, warm-tinted rather than black. */
  --lift-sm:0 1px 2px rgba(61,56,49,.04), 0 4px 12px rgba(61,56,49,.04);
  --lift-md:0 2px 6px rgba(61,56,49,.05), 0 12px 32px rgba(61,56,49,.07);
  --lift-lg:0 4px 12px rgba(61,56,49,.05), 0 28px 64px rgba(61,56,49,.10);

  /* Squircle radii. */
  --sq:2rem;
  --sq-in:calc(2rem - 0.375rem);   /* concentric inner core (double-bezel) */

  /* Motion: mass + spring, never linear/ease-in-out. */
  --swift:cubic-bezier(.32,.72,0,1);
  --settle:cubic-bezier(.22,1,.36,1);

  --font-display:"Instrument Serif",ui-serif,Georgia,serif;
  --font-ui:"Geist",ui-sans-serif,system-ui,-apple-system,sans-serif;

  /* -- Brand ramp (green) ------------------------------------------------ */
  --g-50:#F0F7F3;  --g-100:#DCEDE3;  --g-200:#B9DAC8;
  --g-300:#8AC1A5; --g-400:#4E9E76;  --g-500:#107C41;
  --g-600:#0D6836; --g-700:#0B5A2F;  --g-800:#084426;  --g-900:#05301B;

  /* -- Accent ramp (indigo) ---------------------------------------------- */
  --i-50:#EEF0FE;  --i-100:#E0E3FD;  --i-300:#A5AAF6;
  --i-500:#4F46E5; --i-600:#4338CA;  --i-700:#3730A3;

  /* -- Semantic surfaces -------------------------------------------------- */
  --surface:#FFFFFF;
  --surface-2:#F7FAF8;
  --surface-3:#F0F4F1;
  --fg:#12211A;
  --fg-muted:#5E6E65;
  --fg-subtle:#8A9A91;
  --border:#E2E9E5;
  --border-strong:#CBD8D1;
  --ring:var(--g-500);

  /* -- Radius scale ------------------------------------------------------- */
  --r-sm:6px; --r-md:10px; --r-lg:14px; --r-xl:20px; --r-2xl:28px; --r-full:999px;

  /* -- Elevation ---------------------------------------------------------- */
  --sh-xs:0 1px 2px rgba(18,33,26,.05);
  --sh-sm:0 1px 3px rgba(18,33,26,.07), 0 1px 2px rgba(18,33,26,.04);
  --sh-md:0 4px 12px rgba(18,33,26,.08), 0 2px 4px rgba(18,33,26,.04);
  --sh-lg:0 12px 32px rgba(18,33,26,.10), 0 4px 8px rgba(18,33,26,.04);
  --sh-xl:0 24px 56px rgba(18,33,26,.14), 0 8px 16px rgba(18,33,26,.05);
  --sh-glow:0 0 0 1px rgba(16,124,65,.12), 0 12px 32px rgba(16,124,65,.18);

  /* -- Motion ------------------------------------------------------------- */
  --ease-out:cubic-bezier(.16,.84,.44,1);
  --ease-spring:cubic-bezier(.34,1.56,.64,1);
  --t-fast:.14s; --t-med:.24s; --t-slow:.44s;

  /* -- Typography --------------------------------------------------------- */
  --font-mono:ui-monospace,SFMono-Regular,Consolas,Menlo,monospace;
  --tracking-tight:-.022em;
}

/* Respect the OS reduced-motion setting globally for this layer. Anything
   GSAP-driven is additionally gated in JS (see index.html). */
@media (prefers-reduced-motion:reduce){
  :root{ --t-fast:0s; --t-med:0s; --t-slow:0s; }
}

/* ==========================================================================
   Shared primitives — used by both the landing page and the teacher panel
   ========================================================================== */

/* Focus ring: one consistent treatment, keyboard-only. */
.tk :where(a,button,input,select,textarea):focus-visible{
  outline:2px solid var(--ring); outline-offset:2px; border-radius:var(--r-sm);
}

/* Surface card */
.tk-card{
  background:var(--surface); border:1px solid var(--border);
  border-radius:var(--r-lg); box-shadow:var(--sh-sm);
  transition:transform var(--t-med) var(--ease-out),
             box-shadow var(--t-med) var(--ease-out),
             border-color var(--t-med) var(--ease-out);
}
.tk-card.lift:hover{ transform:translateY(-3px); box-shadow:var(--sh-lg); }

/* Pill / eyebrow label */
.tk-pill{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-mono); font-size:.72rem; font-weight:700;
  letter-spacing:.08em; text-transform:uppercase;
  padding:6px 13px; border-radius:var(--r-full);
  color:var(--g-700); background:var(--g-50); border:1px solid var(--g-200);
}

/* Section heading block */
.tk-sechead{ text-align:center; }
.tk-sechead h2{
  font-size:clamp(1.5rem,3vw,2rem); letter-spacing:var(--tracking-tight);
  color:var(--fg); line-height:1.15;
}
.tk-sechead p{ color:var(--fg-muted); margin-top:10px; font-size:1rem; line-height:1.6; }

/* Buttons — shared shape, colour set by modifier */
.tk-btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-weight:650; font-size:.95rem; line-height:1;
  padding:13px 24px; border-radius:var(--r-md);
  border:1px solid transparent; cursor:pointer; text-decoration:none;
  transition:background var(--t-fast) var(--ease-out),
             border-color var(--t-fast) var(--ease-out),
             box-shadow var(--t-med) var(--ease-out),
             transform var(--t-fast) var(--ease-out);
}
.tk-btn:active{ transform:translateY(1px); }
.tk-btn--primary{ background:var(--g-500); color:#fff; box-shadow:var(--sh-sm); }
.tk-btn--primary:hover{ background:var(--g-600); box-shadow:var(--sh-md); }
.tk-btn--ghost{ background:var(--surface); color:var(--fg); border-color:var(--border-strong); }
.tk-btn--ghost:hover{ background:var(--g-50); border-color:var(--g-400); }
.tk-btn--onDark{ background:#fff; color:var(--g-700); }
.tk-btn--onDark:hover{ background:var(--g-50); }
.tk-btn--onDarkGhost{ background:rgba(255,255,255,.10); color:#fff; border-color:rgba(255,255,255,.45); }
.tk-btn--onDarkGhost:hover{ background:rgba(255,255,255,.20); border-color:rgba(255,255,255,.75); }

/* ==========================================================================
   TEACHER PANEL — editorial theme
   --------------------------------------------------------------------------
   Everything hangs off body.tk-teacher and overrides style.css rather than
   replacing it, so every existing class name and all the inline JS in
   teacher.html keeps working untouched.

   Scope note: the auth screens (#login) have their own rules inside
   teacher.html and take precedence there. student.html never loads this file
   (its :root would clash with style.css's --ink/--paper), so nothing here can
   reach a live exam screen.
   ========================================================================== */

body.tk-teacher{
  background:var(--paper);
  background-image:none;                  /* drop the graph-paper tile */
  font-family:var(--font-ui);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
}
/* Film grain — fixed, so it never repaints while a long roster scrolls. */
body.tk-teacher::before{
  content:""; position:fixed; inset:0; z-index:0; pointer-events:none; opacity:.035;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}
body.tk-teacher .wrap{ position:relative; z-index:1; padding-top:40px }

/* ---------- Headings + eyebrow label ------------------------------------- */
body.tk-teacher h1{
  font-family:var(--font-display); font-weight:400;
  font-size:clamp(2rem,4vw,2.7rem); line-height:1.04;
  letter-spacing:-.022em; color:var(--ink); margin:14px 0 6px;
}
body.tk-teacher h1 em{ font-style:italic; color:var(--sage-deep) }
body.tk-teacher h3{
  font-family:var(--font-display); font-weight:400; font-size:1.32rem;
  letter-spacing:-.015em; color:var(--ink);
}
body.tk-teacher .cellref{
  display:inline-flex; align-items:center; gap:9px;
  background:none; color:var(--ink-subtle); padding:0; border-radius:0;
  font-family:var(--font-ui); font-size:10px; font-weight:500;
  letter-spacing:.2em; text-transform:uppercase;
}
body.tk-teacher .cellref::before{
  content:""; width:5px; height:5px; border-radius:50%; background:var(--signal);
}

/* ---------- Exam cards ---------------------------------------------------- */
/* A single paper plate rather than the landing page's double-bezel: these cards
   host tables, forms and roster rows, and a nested inner-plate pseudo-element
   would need a stacking context that the existing markup does not provide
   (z-index:-1 on ::after paints behind the parent's own background, so the
   plate would simply not show). One surface is safer and reads the same. */
body.tk-teacher .card{
  position:relative;
  background:var(--paper);
  border:1px solid var(--hair);
  border-radius:var(--sq-in);
  padding:26px 28px;
  margin-bottom:20px;
  box-shadow:var(--lift-sm);
  overflow:hidden;
  transition:border-color .5s var(--swift), box-shadow .5s var(--swift);
}
body.tk-teacher .card:hover{ box-shadow:var(--lift-md) }

/* ---------- Editorial meta line under each exam title -------------------- */
body.tk-teacher .card p.small{
  font-size:12.5px; color:var(--ink-muted); line-height:1.6;
}
body.tk-teacher .small{ color:var(--ink-muted) }
body.tk-teacher .urlline{
  font-family:var(--font-mono); font-size:12px; color:var(--ink-muted);
  background:var(--paper-2); border:1px solid var(--hair);
  border-radius:10px; padding:9px 13px;
}

/* ---------- Status badges: same escalation as the landing roster --------- */
body.tk-teacher .badge{
  font-family:var(--font-ui); font-size:11px; font-weight:500; letter-spacing:0;
  text-transform:none; padding:4px 11px; border-radius:999px;
  background:rgba(26,24,21,.055); color:var(--ink-muted);
}
body.tk-teacher .badge.live{
  background:var(--sage-pale); color:var(--sage-deep);
  animation:tkBeat 2.6s ease-out infinite;
}
body.tk-teacher .badge.done{ background:rgba(26,24,21,.055); color:var(--ink-muted) }
body.tk-teacher .badge.warn{ background:#F6EFE0; color:#8A6420 }
body.tk-teacher .badge.locked{ background:#F7E7E3; color:#A8412C }
@keyframes tkBeat{
  0%{ box-shadow:0 0 0 0 rgba(16,124,65,.30) }
  70%{ box-shadow:0 0 0 7px rgba(16,124,65,0) }
  100%{ box-shadow:0 0 0 0 rgba(16,124,65,0) }
}
@media (prefers-reduced-motion:reduce){ body.tk-teacher .badge.live{ animation:none } }

/* ---------- Buttons ------------------------------------------------------- */
body.tk-teacher button{
  font-family:var(--font-ui); font-size:13.5px; font-weight:500; letter-spacing:-.005em;
  border-radius:999px; padding:10px 18px;
  background:var(--ink); color:var(--paper); border:1px solid transparent;
  transition:background .45s var(--swift), color .45s var(--swift),
             border-color .45s var(--swift), box-shadow .45s var(--swift),
             transform .45s var(--swift);
}
body.tk-teacher button:hover{ background:#000; box-shadow:var(--lift-sm) }
body.tk-teacher button:active{ transform:scale(.985) }
body.tk-teacher button.secondary{
  background:transparent; color:var(--ink); border-color:var(--hair-strong);
}
body.tk-teacher button.secondary:hover{ background:rgba(26,24,21,.04); border-color:var(--ink-subtle) }
body.tk-teacher button.danger{ background:#A8412C; color:#FDF6F4 }
body.tk-teacher button.danger:hover{ background:#8E3323 }
body.tk-teacher button:disabled{ opacity:.4 }

/* Dashboard tabs → editorial underline, matching the sign-in tabs. */
body.tk-teacher button.tab{
  background:none; border:none; border-radius:0; padding:0 0 12px;
  margin-right:26px; color:var(--ink-subtle); font-weight:450; position:relative;
}
body.tk-teacher button.tab:hover{ background:none; color:var(--ink-muted); box-shadow:none }
body.tk-teacher button.tab.active{ background:none; color:var(--ink); font-weight:500 }
body.tk-teacher button.tab::after{
  content:""; position:absolute; left:0; right:0; bottom:-1px; height:1.5px;
  background:var(--ink); transform:scaleX(0); transform-origin:left;
  transition:transform .55s var(--swift);
}
body.tk-teacher button.tab.active::after{ transform:scaleX(1) }

body.tk-teacher .iconbtn{
  background:none; color:var(--ink-muted);
  border:1px solid var(--hair-strong); border-radius:10px; padding:7px 10px;
}
body.tk-teacher .iconbtn:hover{
  background:rgba(26,24,21,.04); border-color:var(--ink-subtle);
  color:var(--ink); box-shadow:none;
}
body.tk-teacher .iconbtn.danger{ background:none; color:#A8412C; border-color:rgba(168,65,44,.35) }
body.tk-teacher .iconbtn.danger:hover{ background:#FBEFEC; border-color:#A8412C }

body.tk-teacher button.typebtn{
  background:none; color:var(--ink-subtle); border:1px solid var(--hair-strong);
  border-radius:999px; padding:5px 13px; font-size:12px;
}
body.tk-teacher button.typebtn:hover{ background:rgba(26,24,21,.04); color:var(--ink) }
body.tk-teacher button.typebtn.active{
  background:var(--ink); color:var(--paper); border-color:var(--ink);
}

/* ---------- Inputs -------------------------------------------------------- */
body.tk-teacher input[type=text],
body.tk-teacher input[type=password],
body.tk-teacher input[type=email],
body.tk-teacher input[type=number],
body.tk-teacher select,
body.tk-teacher textarea{
  font-family:var(--font-ui); font-size:14px; color:var(--ink);
  padding:11px 13px; border-radius:11px;
  border:1px solid var(--hair-strong); background:var(--paper);
  transition:border-color .45s var(--swift), box-shadow .45s var(--swift), background .45s var(--swift);
}
body.tk-teacher input::placeholder,
body.tk-teacher textarea::placeholder{ color:var(--ink-subtle); opacity:.75 }
body.tk-teacher input:focus,
body.tk-teacher select:focus,
body.tk-teacher textarea:focus{
  outline:none; border-color:var(--sage); background:#fff;
  box-shadow:0 0 0 3.5px rgba(76,107,88,.13);
}
/* Micro-label treatment is for SHORT field captions only. A label that wraps a
   checkbox is prose (e.g. the retention consent sentence), and setting it in
   spaced uppercase makes it genuinely hard to read — so those keep sentence case
   at a normal reading size. :has() picks them out without touching the markup. */
body.tk-teacher label{
  font-family:var(--font-ui); font-size:11px; font-weight:500;
  letter-spacing:.11em; text-transform:uppercase; color:var(--ink-subtle);
  margin-bottom:8px;
}
body.tk-teacher label:has(input[type=checkbox]),
body.tk-teacher label:has(input[type=radio]){
  font-size:13px; font-weight:400; letter-spacing:0; text-transform:none;
  color:var(--ink-muted); line-height:1.55;
}
body.tk-teacher label:has(input[type=checkbox]) b{ color:var(--ink); font-weight:550 }
body.tk-teacher .optional{ letter-spacing:.06em; color:var(--ink-subtle) }
body.tk-teacher .info{
  border-color:var(--hair-strong); color:var(--ink-subtle); font-size:9px;
}
body.tk-teacher .info:hover,body.tk-teacher .info:focus{
  background:var(--ink); border-color:var(--ink); color:var(--paper);
}

/* ---------- Create-exam form sections ------------------------------------ */
body.tk-teacher .fsection{
  border:1px solid var(--hair); border-radius:var(--sq-in);
  background:var(--paper); padding:24px 26px; margin:0 0 18px;
  box-shadow:var(--lift-sm);
}
body.tk-teacher .fsection > .fhead{
  font-family:var(--font-display); font-weight:400; font-size:1.2rem;
  letter-spacing:-.014em; color:var(--ink);
  padding-bottom:16px; margin-bottom:20px; border-bottom:1px solid var(--hair);
}
body.tk-teacher .fsection > .fhead .fnum{
  width:26px; height:26px; border-radius:999px;
  background:var(--ink); color:var(--paper);
  font-family:var(--font-ui); font-size:11.5px; font-weight:600;
}
body.tk-teacher .subbox{
  background:var(--paper-2); border:1px solid var(--hair); border-radius:12px;
  padding:14px 16px;
}
body.tk-teacher .subbox textarea{ font-family:var(--font-mono); font-size:12.5px }

/* Question editor blocks read as stacked plates. */
body.tk-teacher .qedit{
  background:var(--paper); border:1px solid var(--hair);
  border-radius:var(--sq-in); padding:20px 22px; margin-bottom:16px;
  box-shadow:var(--lift-sm);
  transition:border-color .45s var(--swift), box-shadow .45s var(--swift);
}
body.tk-teacher .qedit:focus-within{
  border-color:var(--sage); box-shadow:0 0 0 3px rgba(76,107,88,.10), var(--lift-sm);
}

/* ---------- Roster table -------------------------------------------------- */
body.tk-teacher .tablewrap{ border:1px solid var(--hair); border-radius:14px }
body.tk-teacher table{ font-family:var(--font-ui); font-size:13px }
body.tk-teacher th{
  font-size:10px; font-weight:500; letter-spacing:.13em; text-transform:uppercase;
  color:var(--ink-subtle); background:var(--paper-2);
  position:sticky; top:0; z-index:2;
  border-bottom:1px solid var(--hair);
}
body.tk-teacher td{ border-bottom:1px solid var(--hair); color:var(--ink-2) }
body.tk-teacher .tablewrap tbody tr{ transition:background .3s var(--swift) }
body.tk-teacher .tablewrap tbody tr:hover,
body.tk-teacher .tablewrap tr:hover{ background:rgba(26,24,21,.028) }

/* Late-entry approvals sit above the admitted roster as a nested, tactile
   queue. The double bezel separates "awaiting a decision" from real students
   without introducing another dense table. */
body.tk-teacher .approval-count{ color:#8A5424; font-weight:600 }
body.tk-teacher .approval-shell{
  margin-top:12px; padding:6px; border-radius:20px;
  background:rgba(154,112,63,.10);
  box-shadow:inset 0 0 0 1px rgba(117,78,36,.10), var(--lift-sm);
}
body.tk-teacher .approval-core{
  padding:18px; border-radius:14px; background:#FFFCF5;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.9), inset 0 0 0 1px rgba(117,78,36,.12);
}
body.tk-teacher .approval-head{
  display:flex; align-items:flex-start; justify-content:space-between; gap:20px;
  padding:2px 2px 15px;
}
body.tk-teacher .approval-eyebrow{
  display:inline-flex; padding:4px 9px; border-radius:999px;
  background:#F4E8D6; color:#805022; font-size:9px; font-weight:650;
  letter-spacing:.16em; text-transform:uppercase;
}
body.tk-teacher .approval-head h4{
  margin:8px 0 2px; font-family:var(--font-display); font-size:1.28rem;
  font-weight:400; letter-spacing:-.012em; color:var(--ink);
}
body.tk-teacher .approval-head p{ margin:0; color:var(--ink-muted); font-size:12.5px }
body.tk-teacher .approval-list{ display:grid; gap:7px }
body.tk-teacher .approval-row{
  display:grid; grid-template-columns:minmax(180px,1fr) auto auto;
  align-items:center; gap:14px; padding:10px 10px 10px 13px; border-radius:12px;
  background:rgba(255,255,255,.72);
  box-shadow:inset 0 0 0 1px rgba(117,78,36,.09);
  transition:transform .45s var(--swift), box-shadow .45s var(--swift), background .45s var(--swift);
}
body.tk-teacher .approval-row:hover{
  transform:translateY(-1px); background:#FFF;
  box-shadow:inset 0 0 0 1px rgba(117,78,36,.14), 0 8px 22px rgba(90,62,31,.07);
}
body.tk-teacher .approval-person{ display:flex; align-items:center; gap:10px; min-width:0 }
body.tk-teacher .approval-person div{ display:grid; min-width:0 }
body.tk-teacher .approval-person b{ color:var(--ink); font-size:13px; font-weight:600 }
body.tk-teacher .approval-person span:not(.approval-dot){ color:var(--ink-muted); font-size:11.5px }
body.tk-teacher .approval-dot{
  width:8px; height:8px; flex:0 0 auto; border-radius:999px; background:#B77731;
  box-shadow:0 0 0 5px rgba(183,119,49,.11);
}
body.tk-teacher .approval-age{ color:#8A6B4D; font-size:11.5px; white-space:nowrap }
body.tk-teacher button.approval-one,
body.tk-teacher button.approval-all{
  display:inline-flex; align-items:center; gap:9px; border:0; border-radius:999px;
  padding:5px 6px 5px 14px; font-size:12px; font-weight:600;
  transition:transform .45s var(--swift), background .45s var(--swift), box-shadow .45s var(--swift);
}
body.tk-teacher button.approval-one{ background:var(--sage-deep); color:var(--paper) }
body.tk-teacher button.approval-all{ background:var(--ink); color:var(--paper) }
body.tk-teacher button.approval-one:hover,
body.tk-teacher button.approval-all:hover{
  transform:translateY(-1px); box-shadow:0 8px 18px rgba(47,40,31,.14);
}
body.tk-teacher button.approval-one:active,
body.tk-teacher button.approval-all:active{ transform:scale(.98) }
body.tk-teacher button.approval-one:disabled,
body.tk-teacher button.approval-all:disabled{ opacity:.45; transform:none; box-shadow:none }
body.tk-teacher .approval-arrow{
  display:grid; place-items:center; width:25px; height:25px; border-radius:999px;
  background:rgba(255,255,255,.13); font-size:14px;
  transition:transform .45s var(--swift), background .45s var(--swift);
}
body.tk-teacher button:hover .approval-arrow{ transform:translateX(2px); background:rgba(255,255,255,.2) }
@media(max-width:767px){
  body.tk-teacher .approval-head{ display:grid; gap:12px }
  body.tk-teacher .approval-head .approval-all{ width:max-content }
  body.tk-teacher .approval-row{ grid-template-columns:1fr auto; gap:9px }
  body.tk-teacher .approval-age{ grid-column:1; padding-left:18px }
  body.tk-teacher .approval-one{ grid-column:2; grid-row:1 / span 2 }
}

/* ---------- Notices ------------------------------------------------------- */
body.tk-teacher .notice{
  background:var(--paper-2); border:none; border-left:2px solid var(--sage);
  border-radius:0 10px 10px 0; padding:14px 16px;
  font-size:13px; line-height:1.6; color:var(--ink-muted);
}
body.tk-teacher .notice strong{ color:var(--ink); font-weight:550 }
body.tk-teacher .err{ color:#B3402C; font-size:13px }
body.tk-teacher .progress{ background:var(--paper-3); border-radius:999px }
body.tk-teacher .progress > div{ background:var(--sage-deep) }

/* Row-level destructive actions sit inside the roster, where a solid red fill on
   every row shouts louder than the action warrants. Outline them; the card-level
   "End exam" keeps its solid fill so the primary destructive action still leads. */
body.tk-teacher td button.danger{
  background:transparent; color:#A8412C; border-color:rgba(168,65,44,.38);
}
body.tk-teacher td button.danger:hover{
  background:#FBEFEC; border-color:#A8412C; color:#8E3323; box-shadow:none;
}

/* ---------- "Find the right IP" dialog ------------------------------------ */
/* Native <dialog>: focus trap, Esc-to-close and backdrop come from the platform. */
body.tk-teacher .ipdlg{
  width:min(94vw,540px); padding:0; border:1px solid var(--hair);
  border-radius:var(--sq); background:var(--paper); color:var(--ink);
  box-shadow:var(--lift-lg);
}
body.tk-teacher .ipdlg::backdrop{ background:rgba(26,24,21,.34) }
@supports ((backdrop-filter:blur(3px))){
  body.tk-teacher .ipdlg::backdrop{ backdrop-filter:blur(3px) }
}
body.tk-teacher .ipdlg-head{
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  padding:22px 24px 18px; border-bottom:1px solid var(--hair);
}
body.tk-teacher .ipdlg-head h3{
  font-family:var(--font-display); font-weight:400; font-size:1.32rem;
  letter-spacing:-.015em; margin:0;
}
body.tk-teacher .ipdlg-head .iconbtn{ font-size:1.15rem; line-height:1; padding:4px 11px }
body.tk-teacher .ipdlg-body{ padding:22px 24px 24px }

body.tk-teacher .ipblock + .ipblock{
  margin-top:20px; padding-top:20px; border-top:1px solid var(--hair);
}
body.tk-teacher .ipblock-l{
  font-size:11px; font-weight:500; letter-spacing:.11em; text-transform:uppercase;
  color:var(--ink-subtle); margin-bottom:12px;
}
body.tk-teacher .ipblock-row{ display:flex; align-items:center; gap:12px; flex-wrap:wrap }
body.tk-teacher .ipval{
  font-family:var(--font-mono); font-size:1.4rem; font-weight:500;
  color:var(--ink); font-variant-numeric:tabular-nums; word-break:break-all;
}
body.tk-teacher .ipval.pending{ font-size:.95rem; color:var(--ink-subtle) }
body.tk-teacher .ipblock-n{
  font-size:12.5px; line-height:1.55; color:var(--ink-muted); margin:12px 0 0;
}
body.tk-teacher .ipblock-n code,
body.tk-teacher .ipurl{
  font-family:var(--font-mono); font-size:12px;
  background:var(--paper-2); border:1px solid var(--hair);
  border-radius:8px; padding:3px 8px; color:var(--ink-2);
}
body.tk-teacher .ipurl{
  flex:1; min-width:0; padding:10px 13px; font-size:12.5px;
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap;
}

/* ---------- Bulk import block --------------------------------------------- */
body.tk-teacher details:has(> .imp-sum){
  background:var(--paper); border:1px solid var(--hair);
  border-radius:var(--sq-in); padding:0; margin:0 0 18px;
  box-shadow:var(--lift-sm);
}
body.tk-teacher .imp-sum{
  list-style:none; cursor:pointer; padding:18px 24px;
  font-family:var(--font-display); font-weight:400; font-size:1.2rem;
  letter-spacing:-.014em; color:var(--ink);
  display:flex; align-items:center; gap:11px;
}
body.tk-teacher .imp-sum::-webkit-details-marker{ display:none }
/* Custom disclosure triangle that rotates open. */
body.tk-teacher .imp-sum::before{
  content:""; width:0; height:0; flex:none;
  border-left:5px solid var(--ink-subtle);
  border-top:4px solid transparent; border-bottom:4px solid transparent;
  transition:transform .4s var(--swift);
}
body.tk-teacher details[open] > .imp-sum::before{ transform:rotate(90deg) }
body.tk-teacher details[open] > .imp-sum{ border-bottom:1px solid var(--hair) }

body.tk-teacher .imp{ padding:20px 24px 22px }
body.tk-teacher .imp-top{
  display:flex; align-items:flex-start; justify-content:space-between;
  gap:20px; margin-bottom:14px; flex-wrap:wrap;
}
body.tk-teacher .imp-lede{
  font-size:13px; line-height:1.6; color:var(--ink-muted); margin:0; max-width:56ch;
}
body.tk-teacher .imp-lede code{
  font-family:var(--font-mono); font-size:11.5px;
  background:var(--paper-2); border:1px solid var(--hair);
  border-radius:5px; padding:1px 5px; color:var(--ink-2);
}
body.tk-teacher .imp-guide{
  flex:none; display:inline-flex; align-items:center; gap:7px;
  font-size:12.5px; font-weight:500; text-decoration:none;
  padding:8px 15px; border-radius:999px;
  color:var(--sage-deep); background:var(--sage-pale);
  border:1px solid rgba(76,107,88,.22);
  transition:background .4s var(--swift), gap .4s var(--swift);
}
body.tk-teacher .imp-guide:hover{ background:#DCE6DC; gap:10px }

body.tk-teacher .imp-text{
  width:100%; font-family:var(--font-mono); font-size:12.5px; line-height:1.6;
  padding:16px 18px; border-radius:14px; background:var(--paper-2);
  border:1px solid var(--hair-strong); color:var(--ink);
  resize:vertical; tab-size:2;
}
body.tk-teacher .imp-text:focus{
  background:#fff; border-color:var(--sage);
  box-shadow:0 0 0 3.5px rgba(76,107,88,.13); outline:none;
}

/* Action bar: low-emphasis helpers left, the three real actions right. */
body.tk-teacher .imp-bar{
  display:flex; align-items:center; justify-content:space-between;
  gap:16px; margin-top:14px; flex-wrap:wrap;
}
body.tk-teacher .imp-bar-l,
body.tk-teacher .imp-bar-r{ display:flex; align-items:center; gap:9px; flex-wrap:wrap }
body.tk-teacher .imp-file{
  cursor:pointer; margin:0; padding:9px 16px; border-radius:999px;
  font-family:var(--font-ui); font-size:13px; font-weight:450; letter-spacing:0;
  text-transform:none; color:var(--ink-muted);
  border:1px dashed var(--hair-strong); background:transparent;
  transition:border-color .4s var(--swift), color .4s var(--swift), background .4s var(--swift);
}
body.tk-teacher .imp-file:hover{
  border-color:var(--ink-subtle); color:var(--ink); background:rgba(26,24,21,.03);
}
/* Text-only helpers — these are not primary actions and should not look like buttons. */
body.tk-teacher .imp-link{
  background:none; border:none; padding:6px 4px; border-radius:0;
  font-size:12.5px; font-weight:450; color:var(--ink-subtle);
  text-decoration:underline; text-underline-offset:3px;
  text-decoration-color:var(--hair-strong);
}
body.tk-teacher .imp-link:hover{
  background:none; box-shadow:none; color:var(--ink); text-decoration-color:var(--ink-subtle);
}
body.tk-teacher .imp-result:empty{ display:none }
body.tk-teacher .imp-result{
  margin-top:14px; padding:12px 15px; border-radius:11px;
  background:var(--paper-2); border:1px solid var(--hair);
  font-size:12.5px; line-height:1.6;
}
/* Option-prefix legend: a compact key, kept out of the prose so the sentence
   above does not end up with code chips colliding mid-wrap. */
body.tk-teacher .imp-legend{
  display:flex; gap:18px; flex-wrap:wrap; margin:9px 0 0;
  font-size:12px; color:var(--ink-subtle);
}
body.tk-teacher .imp-legend code{
  font-family:var(--font-mono); font-size:11.5px; margin-right:5px;
  background:var(--paper-2); border:1px solid var(--hair);
  border-radius:5px; padding:1px 6px; color:var(--ink-2);
}