/* Classroom Engagement Tools: shared look for the portal, Setup, Pulse Check and Showdown (Hot Seat and Solo have their own).
   Navy theme with rounded, friendly pieces. Each tool sets its own accent (--pulse): violet here, coral in Pulse Check,
   royal blue in Showdown. Headings use Fredoka. */
:root{
  --ink:#0c0f1e; --ink-2:#141933; --ink-3:#1c2242; --ink-4:#262e57;
  --line:#2f3866; --text:#f4f2ff; --muted:#a0a8cf; --faint:#6e77a3;
  --pulse:#7c6cff; --pulse-deep:#5546d6; --pulse-glow:rgba(124,108,255,.35);
  --mint:#3ddc9b; --mint-bg:#123d33; --red:#ff7b6b; --red-bg:#43202a; --amber:#ffbf47;
  --o0:#8f7dff; --o1:#33c6e8; --o2:#ffbf47; --o3:#ff6fb0; --o4:#9fdc5a; --o5:#ff8a4c;
  --display:"Fredoka","Segoe UI",Arial,sans-serif;
  --body:"Atkinson Hyperlegible","Segoe UI",Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  --r:20px;
  --link:#c9c2ff; --card-2:rgba(20,25,51,.85);
  --err-text:#ffd2cb; --err-line:#6a3440; --ok-text:#c9ffe8; --ok-line:#23705a; --mint-ink:#062a1f; --mint-deep:#1f9b6c;
  --shadow:rgba(0,0,0,.35);
  color-scheme:dark;
}
/* Light mode (the ☀ button; saved to the instructor's account) */
:root[data-theme="light"]{
  --ink:#f4f5fb; --ink-2:#ffffff; --ink-3:#eef0f8; --ink-4:#e3e6f3;
  --line:#d3d7e8; --text:#161a33; --muted:#565d80; --faint:#868cab;
  --pulse-deep:#5546d6; --pulse-glow:rgba(124,108,255,.22);
  --mint:#1fa774; --mint-bg:#dcf5ea; --red:#c93a2f; --red-bg:#fde6e3; --amber:#b87d00;
  --link:#5546d6; --card-2:rgba(255,255,255,.94);
  --err-text:#8e2a21; --err-line:#f1b9b2; --ok-text:#0f5f40; --ok-line:#9fdcc2; --mint-ink:#ffffff; --mint-deep:#15805a;
  --shadow:rgba(30,40,90,.14);
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%}
/* Headings use Fredoka up to 600; don't fake a heavier weight */
html{font-synthesis-weight:none}
[hidden]{display:none!important}
body{
  background:
    radial-gradient(ellipse 80% 55% at 85% -10%, rgba(124,108,255,.18), transparent 60%),
    radial-gradient(ellipse 70% 50% at -10% 110%, rgba(51,198,232,.10), transparent 60%),
    var(--ink) fixed;
  color:var(--text);font-family:var(--body);font-size:16px;line-height:1.45;
  -webkit-font-smoothing:antialiased;
}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px}
a{color:var(--link)}

/* Logo */
.logo{white-space:nowrap;display:inline-flex;align-items:center;gap:calc(.45em);font-family:var(--display);font-weight:800;
  font-size:calc(1.35rem * var(--logo,1));line-height:1;color:var(--text)}
.logo svg{width:1.6em;height:1.1em;color:var(--pulse);filter:drop-shadow(0 0 6px var(--pulse-glow))}

/* Common pieces */
.card{background:linear-gradient(180deg,var(--ink-2),var(--card-2));border:2px solid var(--line);border-radius:var(--r);padding:18px}
/* A card that stands out (the student in the hot seat, a score): accent edge with an inner ring */
.card.feature{border:3px solid var(--pulse);box-shadow:inset 0 0 0 3px var(--ink),0 8px 22px var(--shadow)}
.card h2{font-family:var(--display);font-weight:700;font-size:1.15rem;margin:0 0 12px}
.eyebrow{font-size:.78rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.muted{color:var(--muted)}
.small{font-size:.88rem}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.grow{flex:1 1 auto;min-width:0}
.stack{display:flex;flex-direction:column;gap:12px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:2px solid transparent;border-radius:999px;padding:10px 20px;font-weight:700;
  background:var(--pulse);color:#fff;transition:transform .08s, filter .15s;text-decoration:none;white-space:nowrap}
.btn:hover:not(:disabled){filter:brightness(1.07);transform:translateY(-1px)}
.btn:active:not(:disabled){transform:translateY(1px)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.big{padding:15px 22px;font-size:1.1rem;width:100%}
.btn.quiet{background:transparent;color:var(--text);border:2px solid var(--line);box-shadow:none}
.btn.quiet:hover:not(:disabled){border-color:var(--pulse);filter:none}
.btn.small{padding:6px 14px;font-size:.88rem}
.btn.mint{background:var(--mint);color:var(--mint-ink)}
.btn.danger{background:transparent;color:var(--red);border:2px solid var(--err-line);box-shadow:none}
.btn.danger:hover:not(:disabled){border-color:var(--red)}
.linkish{background:none;border:0;color:var(--muted);text-decoration:underline;padding:4px;font-size:.92rem}
.linkish:hover{color:var(--text)}

label.field{display:flex;flex-direction:column;gap:6px;font-weight:700;font-size:.95rem}
input[type=text],input[type=email],input[type=password],input[type=date],input:not([type]),select,textarea{
  width:100%;background:var(--ink);border:2px solid var(--line);border-radius:12px;padding:10px 13px;font-size:1rem}
select{border-radius:999px;padding-left:16px}
input:focus,select:focus,textarea:focus{border-color:var(--pulse);outline:none;box-shadow:0 0 0 3px var(--pulse-glow)}
textarea{resize:vertical;min-height:80px}
select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);
  background-position:calc(100% - 18px) 55%,calc(100% - 12px) 55%;background-size:6px 6px;background-repeat:no-repeat;padding-right:34px}

.msg{border-radius:14px;padding:10px 14px;font-weight:700}
.msg.err{background:var(--red-bg);color:var(--err-text);border:1px solid var(--err-line)}
.msg.ok{background:var(--mint-bg);color:var(--ok-text);border:1px solid var(--ok-line)}
.msg.info{background:var(--ink-3);color:var(--muted);border:1px solid var(--line)}

/* Answer tiles, used on every page */
.opts{display:grid;gap:10px}
.opt{position:relative;display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px;align-items:center;text-align:left;
  background:var(--ink-3);border:2px solid var(--line);border-radius:14px;padding:12px 14px;min-height:56px;transition:border-color .12s, background .12s, transform .08s}
.opt .key{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;font-family:var(--display);font-weight:800;color:#0c0f1e;background:var(--c)}
.opt[data-i="0"]{--c:var(--o0)} .opt[data-i="1"]{--c:var(--o1)} .opt[data-i="2"]{--c:var(--o2)}
.opt[data-i="3"]{--c:var(--o3)} .opt[data-i="4"]{--c:var(--o4)} .opt[data-i="5"]{--c:var(--o5)}
button.opt:hover:not(:disabled){border-color:var(--c);transform:translateY(-1px)}
button.opt:active:not(:disabled){transform:scale(.99)}
.opt[aria-checked="true"]{border-color:var(--c);background:color-mix(in srgb,var(--c) 18%,var(--ink-3))}
.opt[aria-checked="true"]::after{content:"✓";position:absolute;right:12px;top:50%;transform:translateY(-50%);font-weight:800;color:var(--c);font-size:1.2rem}
.opt.correct{border-color:var(--mint);background:var(--mint-bg)}
.opt.correct .key{background:var(--mint)}
.opt.dim{opacity:.55}

#toast{position:fixed;left:50%;bottom:22px;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:var(--ink-4);border:1px solid var(--line);
  padding:10px 18px;border-radius:999px;font-weight:700;transition:.2s;z-index:50;max-width:calc(100vw - 32px)}
#toast.show{opacity:1;transform:translate(-50%,0)}
#toast.err{background:var(--red-bg);border-color:var(--err-line)}

.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* Suite logo: Braincloud cloud, name and tagline */
.hublogo{text-decoration:none;color:var(--text);gap:12px}
.hublogo img{width:calc(64px * var(--logo,1));height:auto;display:block;flex:none}
.hublogo .hubname{display:flex;flex-direction:column;line-height:1.1}
.hublogo .hubname b{font-weight:600;font-size:calc(1.5rem * var(--logo,1))}
.hublogo .hubname small{font-family:var(--body, inherit);font-size:.86rem;font-weight:500;color:var(--muted)}

/* Page frame */
body.page{padding:max(14px,env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) max(28px,env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left))}
.wrap{max-width:1040px;margin:0 auto;display:flex;flex-direction:column;gap:18px}
header.bar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.acct{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.88rem;min-width:0;flex-wrap:wrap}
.acct .signed{display:contents}
.acct .email{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:46vw}
.crumb{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.crumb .sep{color:var(--faint)}
.crumb .here{font-family:var(--display);font-weight:800;font-size:1.35rem}

nav.tabs{display:flex;gap:6px;background:var(--ink-2);border:2px solid var(--line);border-radius:999px;padding:5px}
nav.tabs button{flex:1;border:0;background:transparent;border-radius:999px;padding:10px 8px;font-weight:700;color:var(--muted)}
nav.tabs button[aria-selected="true"]{background:var(--pulse);color:#fff}

.icon{width:36px;height:36px;padding:0;border-radius:50%;background:transparent;border:2px solid var(--line);display:inline-grid;place-items:center;font-size:.95rem;flex:none}
.icon:hover:not(:disabled){border-color:var(--pulse)}
.icon:disabled{opacity:.35;cursor:not-allowed}
.empty{text-align:center;padding:26px 10px;color:var(--muted)}
.pill{display:inline-block;font-size:.75rem;font-weight:700;padding:2px 8px;border-radius:999px;background:var(--ink-4);color:var(--muted);white-space:nowrap}
.pill.on{background:var(--mint-bg);color:var(--mint)}

/* The light/dark button */
.theme-toggle{white-space:nowrap}
.toplinks{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.toplinks .btn{text-decoration:none}