:root {
  color-scheme: light;
  --background: #f3f5f8;
  --surface: #fff;
  --surface-soft: #f8f1f4;
  --surface-blue: #edf3f9;
  --text: #171a1f;
  --muted: #626a76;
  --border: #d9dee5;
  --maroon: #8b1538;
  --maroon-dark: #71102d;
  --navy: #17365d;
  --green: #39724e;
  --amber: #a4630c;
  --danger: #a8203f;
  --shadow: 0 18px 55px rgba(20,30,44,.1);
}
* { box-sizing: border-box; }
html { min-height: 100%; }
body {
  min-height: 100vh; margin: 0; color: var(--text);
  background: radial-gradient(circle at 8% 0%, rgba(23,54,93,.08), transparent 31rem),
    radial-gradient(circle at 94% 4%, rgba(139,21,56,.08), transparent 27rem), var(--background);
  font-family: Arial, "Segoe UI", sans-serif;
}
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: .55rem; font-size: clamp(1.8rem,4vw,2.65rem); line-height: 1.08; font-weight: 600; letter-spacing: -.035em; }
h2 { margin-bottom: .45rem; font-size: 1.35rem; font-weight: 600; letter-spacing: -.02em; }
h3 { font-size: 1rem; }
small { color: var(--muted); }
.hidden { display: none !important; }
.sr-only { width: 1px; height: 1px; padding: 0; margin: -1px; position: absolute; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.site-header {
  min-height: 70px; padding: 12px max(18px,calc((100vw - 1220px)/2));
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
  background: rgba(255,255,255,.93); border-bottom: 1px solid rgba(217,222,229,.9);
  backdrop-filter: blur(15px);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand > span:last-child { display: grid; gap: 2px; }
.brand small { font-size: .75rem; }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; color: #fff; background: linear-gradient(145deg,var(--maroon),var(--maroon-dark)); border-radius: 10px; font-weight: 700; box-shadow: 0 8px 20px rgba(139,21,56,.2); }
.connection-status { display: flex; align-items: center; gap: 8px; color: var(--green); font-size: .9rem; }
.connection-status::before { content: ""; width: 8px; height: 8px; background: currentColor; border-radius: 50%; }
.connection-status[data-state="offline"] { color: var(--danger); }

.page-shell { width: min(100% - 32px,1120px); margin: 36px auto 70px; }
.student-shell { max-width: 1120px; }
.teacher-shell { width: min(100% - 32px,1400px); margin: 32px auto 70px; }
.surface { background: var(--surface); border: 1px solid var(--border); border-radius: 18px; box-shadow: var(--shadow); }
.join-surface, .setup-surface { max-width: 760px; margin: 7vh auto 0; padding: clamp(28px,6vw,58px); }
.section-heading { margin-bottom: 30px; }
.eyebrow { margin-bottom: 10px; color: var(--maroon); font-size: .78rem; font-weight: 700; letter-spacing: .11em; }
.lead { margin-bottom: 0; color: var(--muted); line-height: 1.55; }
.form-stack { display: grid; gap: 18px; }
label { display: grid; gap: 8px; color: var(--text); font-weight: 600; }
input { width: 100%; min-height: 48px; padding: 12px 14px; color: var(--text); background: #fff; border: 1px solid var(--border); border-radius: 10px; outline: none; }
input:focus { border-color: var(--maroon); box-shadow: 0 0 0 3px rgba(139,21,56,.13); }
.button { min-height: 44px; padding: 10px 17px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 10px; cursor: pointer; font-weight: 600; transition: transform 150ms ease,border-color 150ms ease,background 150ms ease; }
.button:hover { transform: translateY(-1px); border-color: #aeb6c0; }
.button:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.button-primary { color: #fff; background: var(--maroon); border-color: var(--maroon); }
.button-primary:hover { background: var(--maroon-dark); border-color: var(--maroon-dark); }
.button-ghost { background: transparent; }
.button-block { width: 100%; }
.button-row { display: flex; flex-wrap: wrap; gap: 10px; }
.button-arrow { margin-left: auto; font-size: 1.2rem; }
.form-error { min-height: 1.2rem; margin: 0; color: var(--danger); font-weight: 500; }
.privacy-note, .purpose-note { margin-top: 22px; padding: 14px 16px; display: grid; gap: 4px; color: var(--muted); border-radius: 10px; line-height: 1.45; }
.privacy-note { background: var(--surface-blue); border-left: 4px solid var(--navy); }
.privacy-note strong { color: var(--navy); }
.purpose-note { background: linear-gradient(135deg,#fff7f9,#f7f9fc); border: 1px solid #ecd9df; border-left: 4px solid var(--maroon); }
.purpose-note strong { color: var(--maroon-dark); }

.game-picker-view { max-width: 1120px; margin: 2vh auto 0; padding: clamp(26px,5vw,52px); }
.picker-hero { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
.picker-hero h1 { margin-bottom: 10px; }
.picker-prompt { width: 104px; height: 104px; flex: 0 0 104px; display: flex; align-items: center; justify-content: center; gap: 7px; color: var(--navy); background: linear-gradient(145deg,#f1f5fa,#fff7f9); border: 1px solid var(--border); border-radius: 24px; transform: rotate(3deg); }
.picker-prompt span { color: var(--maroon); font-size: 3.2rem; font-weight: 700; line-height: 1; }
.picker-prompt small { color: var(--navy); font-size: .72rem; font-weight: 700; line-height: 1.2; }
.game-index { margin: 16px 0 0; color: var(--maroon); font-size: .78rem; font-weight: 700; letter-spacing: .03em; }
.games-loading { min-height: 180px; display: grid; place-items: center; align-content: center; gap: 6px; color: var(--muted); border: 1px dashed var(--border); border-radius: 14px; text-align: center; }
.games-loading strong { color: var(--navy); }

.lesson-route { margin-top: 28px; padding: 15px; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 8px; background: linear-gradient(135deg,#f6f8fb,#fff8fa); border: 1px solid var(--border); border-radius: 14px; }
.route-item { display: grid; gap: 3px; text-align: center; }
.route-item span { width: 28px; height: 28px; margin: 0 auto 3px; display: grid; place-items: center; color: #fff; background: var(--navy); border-radius: 50%; font-weight: 700; }
.route-item:nth-child(2) span, .route-item:nth-child(4) span { background: var(--maroon); }
.route-item strong { color: var(--navy); font-size: .9rem; }
.route-item small { font-size: .72rem; }

#lobby-view { padding: clamp(24px,5vw,46px); }
.lobby-header, .experiment-header, .section-row, .dashboard-simple-header, .live-data-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 22px; }
.lobby-brief, .teacher-note { margin-top: 26px; padding: 18px 20px; border-left: 4px solid var(--maroon); background: linear-gradient(135deg,#fff8fa,#f7f9fc); border-radius: 10px; }
.lobby-brief h2 { margin-bottom: 4px; color: var(--navy); }
.lobby-brief p:last-child, .teacher-note span { margin-bottom: 0; color: var(--muted); }
.experiment-list { margin: 32px 0; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.experiment-card { min-height: 246px; padding: 20px; display: grid; grid-template-columns: 82px 1fr; gap: 17px; border: 1px solid var(--border); border-radius: 16px; background: linear-gradient(145deg,#fff,#fbfcfe); transition: transform 180ms ease,box-shadow 180ms ease,border-color 180ms ease; }
.experiment-card:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(23,54,93,.08); }
.experiment-card.is-complete { border-color: #b8d1c0; }
.game-card-visual { min-height: 204px; padding: 11px; display: flex; flex-direction: column; align-items: flex-start; justify-content: space-between; color: #fff; border-radius: 13px; overflow: hidden; position: relative; }
.game-card-visual::after { content: ""; width: 88px; height: 88px; position: absolute; right: -26px; bottom: -22px; border: 16px solid rgba(255,255,255,.2); border-radius: 50%; }
.game-tone-1 { background: linear-gradient(155deg,#8b1538,#c35a78); }
.game-tone-2 { background: linear-gradient(155deg,#17365d,#3b76ad); }
.game-tone-3 { background: linear-gradient(155deg,#1f4b47,#4d9a85); }
.game-tone-4 { background: linear-gradient(155deg,#8e5b18,#d59a36); }
.experiment-number { width: 34px; height: 34px; display: grid; place-items: center; color: currentColor; background: rgba(255,255,255,.18); border: 1px solid rgba(255,255,255,.35); border-radius: 10px; font-weight: 700; }
.game-card-glyph { align-self: center; margin-bottom: 24px; color: rgba(255,255,255,.92); font-size: 4.3rem; line-height: 1; font-weight: 300; }
.experiment-card-copy { min-width: 0; }
.card-topline { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.card-topline h2 { margin: 3px 0 3px; color: var(--navy); font-size: 1.35rem; }
.game-number-label { color: var(--maroon); font-size: .68rem; font-weight: 800; letter-spacing: .12em; }
.game-subtitle { margin: 0; color: var(--muted); font-size: .84rem; line-height: 1.35; }
.module-status { padding: 4px 7px; color: var(--maroon); background: var(--surface-soft); border-radius: 999px; font-size: .66rem; font-weight: 800; letter-spacing: .08em; }
.knowledge-chip { margin: 16px 0 12px; padding: 9px 11px; display: grid; gap: 3px; background: var(--surface-blue); border-radius: 9px; }
.knowledge-chip span { color: var(--maroon); font-size: .63rem; font-weight: 800; letter-spacing: .1em; }
.knowledge-chip strong { color: var(--navy); font-size: .9rem; }
.experiment-do { min-height: 42px; display: block; color: var(--muted); line-height: 1.4; }
.experiment-do strong { color: var(--navy); }
.play-game-button { width: 100%; margin-top: 13px; justify-content: space-between; }
.picker-footer { margin-top: 26px; padding: 13px 15px; display: flex; align-items: flex-start; gap: 10px; color: var(--muted); background: #f8fafc; border: 1px solid var(--border); border-radius: 10px; }
.picker-footer p { margin: 0; line-height: 1.45; }
.picker-footer strong { color: var(--navy); }
.footer-icon { width: 22px; height: 22px; flex: 0 0 22px; display: grid; place-items: center; color: #fff; background: var(--navy); border-radius: 50%; font-size: .78rem; font-weight: 700; }

.experiment-surface { padding: clamp(20px,4vw,38px); }
.trial-progress { width: min(240px,38vw); color: var(--muted); text-align: right; }
.progress-track { height: 8px; margin-top: 8px; background: var(--border); border-radius: 999px; overflow: hidden; }
.progress-track span { display: block; width: 0; height: 100%; background: var(--maroon); transition: width 220ms ease; }
.condition-intro { min-height: 470px; margin-top: 24px; padding: clamp(28px,7vw,68px); display: grid; place-items: center; align-content: center; gap: 28px; text-align: center; border: 1px solid var(--border); border-radius: 15px; background: linear-gradient(145deg,#fff,#f8fafc); }
.condition-intro p { max-width: 650px; color: var(--muted); line-height: 1.6; }
.instruction-reminder { max-width: 620px; padding: 13px 17px; color: var(--navy); background: var(--surface-blue); border-radius: 9px; font-weight: 700; }
.experiment-overview { width: min(100%,760px); margin: 0 auto 22px; padding: 14px; display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 9px; background: #fff; border: 1px solid var(--border); border-radius: 12px; text-align: left; }
.overview-item { min-height: 66px; padding: 10px 12px; display: grid; align-content: center; gap: 4px; background: var(--surface-blue); border-radius: 8px; }
.overview-item span { color: var(--maroon); font-size: .68rem; font-weight: 800; letter-spacing: .08em; }
.overview-item strong { color: var(--navy); font-size: .88rem; line-height: 1.3; }
.intro-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }

.setup-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.wide-field { grid-column: 1 / -1; }
.class-setup-guide { margin-top: 30px; padding-top: 24px; border-top: 1px solid var(--border); }
.class-setup-guide > .eyebrow { margin-bottom: 13px; }
.setup-guide-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 10px; }
.setup-guide-item { min-height: 76px; padding: 12px; display: flex; align-items: flex-start; gap: 10px; background: linear-gradient(145deg,#fff,#f8fafc); border: 1px solid var(--border); border-radius: 10px; }
.setup-guide-item > span { width: 25px; height: 25px; flex: 0 0 25px; display: grid; place-items: center; color: #fff; background: var(--navy); border-radius: 50%; font-size: .78rem; font-weight: 700; }
.setup-guide-item:nth-child(2) > span, .setup-guide-item:nth-child(3) > span { background: var(--maroon); }
.setup-guide-item div { display: grid; gap: 3px; }
.setup-guide-item strong { color: var(--navy); font-size: .88rem; }
.setup-guide-item small { line-height: 1.3; }

.simple-dashboard { display: grid; gap: 18px; }
.dashboard-simple-header h1 { margin-bottom: 8px; }
.status-line { color: var(--green); font-weight: 600; }
.status-line[data-status="draft"] { color: var(--amber); }
.teacher-note { display: flex; align-items: center; gap: 12px; margin: 0 0 0; border-left-color: var(--navy); }
.teacher-note strong { color: var(--navy); }
.share-panel, .step-card { padding: clamp(22px,4vw,32px); box-shadow: none; }
.step-heading { display: flex; align-items: flex-start; gap: 14px; }
.step-heading h2 { margin-bottom: 6px; }
.step-heading p, .section-help { margin: 0; color: var(--muted); line-height: 1.45; }
.step-number { width: 34px; height: 34px; flex: 0 0 34px; display: grid; place-items: center; color: #fff; background: var(--maroon); border-radius: 50%; font-weight: 700; }
.share-content { margin-top: 22px; display: grid; grid-template-columns: minmax(190px,.45fr) minmax(0,1.55fr); gap: 14px; }
.class-code-block, .student-address { min-height: 104px; padding: 18px 20px; display: grid; align-content: center; gap: 7px; background: var(--surface-blue); border: 1px solid #cad9e7; border-radius: 12px; }
.class-code-block span, .student-address span, .selected-test span { color: var(--muted); font-size: .8rem; font-weight: 700; }
.class-code-block strong { color: var(--maroon); font-size: clamp(2rem,5vw,3rem); line-height: 1; letter-spacing: .08em; }
.student-address code { overflow-wrap: anywhere; color: var(--navy); font-family: Arial,"Segoe UI",sans-serif; font-size: 1rem; font-weight: 600; }
.workflow-grid { display: grid; grid-template-columns: minmax(0,1.5fr) minmax(290px,.5fr); gap: 18px; align-items: stretch; }
.simple-dashboard .control-grid { margin-top: 22px; display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
.simple-dashboard .experiment-control { min-height: 122px; padding: 15px; display: grid; gap: 5px; text-align: left; color: var(--text); background: linear-gradient(145deg,#fff,#fbfcfe); border: 1px solid var(--border); border-radius: 10px; cursor: pointer; }
.simple-dashboard .experiment-control:hover { border-color: #aeb6c0; }
.simple-dashboard .experiment-control.is-active { border: 2px solid var(--maroon); background: var(--surface-soft); box-shadow: 0 10px 22px rgba(139,21,56,.1); }
.experiment-control strong { color: var(--navy); }
.experiment-control .control-goal { color: var(--text); font-size: .87rem; line-height: 1.3; }
.experiment-control small { color: var(--muted); font-size: .75rem; }
.start-card { display: flex; flex-direction: column; }
.selected-test { margin: 30px 0 18px; padding: 18px; display: grid; gap: 7px; background: linear-gradient(135deg,#fff8fa,#f8f1f4); border: 1px solid #e5c7d0; border-radius: 11px; }
.selected-test strong { color: var(--maroon); font-size: 1.1rem; }
.selected-test small { color: var(--muted); line-height: 1.4; }
.start-button { width: 100%; min-height: 58px; margin-top: auto; font-size: 1.05rem; }
.live-data-section { padding: 6px 0 0; }
.live-data-section .metrics-grid { margin-top: 16px; }
.metrics-grid { margin-top: 24px; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 14px; }
.metric { padding: 18px; display: grid; gap: 5px; background: linear-gradient(145deg,#fff,#fbfcfe); border: 1px solid var(--border); border-radius: 12px; }
.metric span,.metric small { color: var(--muted); }
.metric strong { color: var(--navy); font-size: 2rem; font-variant-numeric: tabular-nums; }
.simple-data-grid { display: grid; grid-template-columns: minmax(0,1.45fr) minmax(300px,.55fr); gap: 18px; }
.dashboard-section { padding: 24px; box-shadow: none; }
.simple-data-grid .section-help { margin-bottom: 14px; }
.condition-chart { min-height: 280px; margin-top: 18px; display: flex; align-items: end; gap: 12px; border-bottom: 1px solid var(--border); }
.chart-placeholder { width: 100%; min-height: 250px; display: grid; place-items: center; align-content: center; gap: 7px; color: var(--muted); text-align: center; border: 1px dashed var(--border); border-radius: 10px 10px 0 0; background: linear-gradient(145deg,#fff,#f8fafc); }
.chart-placeholder strong { color: var(--navy); font-size: 1.05rem; }
.chart-column { min-width: 56px; flex: 1; display: grid; align-content: end; gap: 7px; text-align: center; }
.chart-bar { width: min(58px,75%); min-height: 5px; margin: 0 auto; background: linear-gradient(180deg,var(--maroon),var(--maroon-dark)); border-radius: 7px 7px 0 0; }
.chart-value { color: var(--navy); font-weight: 700; }
.chart-label { min-height: 36px; color: var(--muted); font-size: .75rem; }
.quality-list { margin-top: 16px; display: grid; gap: 10px; }
.quality-item { padding: 12px; background: #fff5f7; border-left: 3px solid var(--maroon); border-radius: 7px; }
.quality-item strong { display: block; margin-bottom: 3px; }
.empty-state { color: var(--muted); }
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; margin-top: 14px; border-collapse: collapse; }
.data-table th,.data-table td { padding: 12px 10px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
.data-table th { color: var(--muted); font-size: .8rem; }

.toast { position: fixed; right: 22px; bottom: 22px; max-width: min(420px,calc(100vw - 44px)); padding: 13px 17px; color: #fff; background: #23272d; border-radius: 10px; box-shadow: var(--shadow); z-index: 10; }

/* Four courseware game boards */
.game-board { margin-top: 24px; padding: clamp(18px,4vw,32px); border: 1px solid var(--border); border-radius: 16px; background: linear-gradient(145deg,#fff,#f7f9fc); }
.game-status { margin: 12px 0; color: var(--muted); line-height: 1.45; }
.game-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 14px; color: var(--muted); line-height: 1.4; }
.game-toolbar strong { color: var(--navy); }
.round-timer { min-width: 58px; color: var(--maroon)!important; font-variant-numeric: tabular-nums; text-align: right; }
.selective-game,.divided-game,.fitts-game,.vigilance-game { max-width: 720px; margin: 0 auto; }
.number-grid { max-width: 520px; margin: 20px auto; padding: 12px; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px; background: #1e2530; border: 8px solid #dce3eb; border-radius: 16px; box-shadow: inset 0 0 0 1px rgba(255,255,255,.15),0 12px 28px rgba(23,54,93,.12); }
.number-cell,.dual-cell { min-height: 64px; border: 0; border-radius: 9px; cursor: pointer; font-size: 1.35rem; font-weight: 800; transition: transform 120ms ease,opacity 120ms ease,background 120ms ease; }
.number-cell.is-target { color: #fff; background: var(--maroon); box-shadow: 0 3px 0 rgba(0,0,0,.16); }
.number-cell.is-distractor { color: #fff; background: #20252c; }
.number-cell:hover,.dual-cell:hover { transform: translateY(-2px); }
.number-cell.is-picked { color: var(--maroon); background: #fff; outline: 3px solid #f3b4c4; }
.number-cell.is-wrong,.dual-cell.is-wrong { background: var(--danger); animation: shake 220ms ease; }
.number-cell:focus-visible,.dual-cell:focus-visible,.radar-report:focus-visible,.fitts-target:focus-visible { outline: 3px solid #e8aa3c; outline-offset: 3px; }
.dual-grid { max-width: 600px; margin: 20px auto 13px; padding: 14px; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px; background: #f0f4f8; border: 1px solid #cad9e7; border-radius: 14px; }
.dual-cell.is-target { color: #fff; background: var(--navy); box-shadow: 0 3px 0 rgba(0,0,0,.12); }
.dual-cell.is-distractor { color: #687383; background: #dce3eb; }
.dual-cell.is-picked { color: #17365d; background: #c9dced; opacity: .55; transform: scale(.94); }
.dual-cell:disabled { cursor: default; }
.dual-progress { margin: 16px auto 0; padding: 11px 14px; display: flex; justify-content: center; gap: 8px; color: var(--navy); background: var(--surface-blue); border-radius: 9px; font-weight: 700; }
.tone-dot { width: 11px; height: 11px; margin-top: 4px; display: inline-block; background: var(--maroon); border-radius: 50%; animation: pulse 1.1s infinite; }
.count-form { max-width: 480px; margin: 20px auto 0; padding: 20px; display: grid; gap: 14px; background: #fff; border: 1px solid var(--border); border-radius: 12px; }
.count-form h3 { margin: 0; color: var(--navy); }
.count-form p { margin: 0; color: var(--muted); }
.count-form .button { justify-self: start; }
.game-feedback { margin: 18px auto 0; padding: 12px 15px; max-width: 560px; text-align: center; border-radius: 9px; font-weight: 700; }
.game-feedback.is-good { color: var(--green); background: #edf6f0; }
.game-feedback.is-retry { color: var(--maroon); background: #fff1f4; }
.vigilance-game { text-align: center; }
.radar-readout { display: flex; align-items: center; justify-content: center; gap: 10px; color: var(--navy); }
.radar-readout strong { letter-spacing: .1em; }
.radar-readout small { margin-left: 8px; }
.radar-pulse { width: 12px; height: 12px; display: inline-block; background: var(--green); border-radius: 50%; box-shadow: 0 0 0 0 rgba(57,114,78,.35); animation: radarPulse 1.8s infinite; }
.radar-screen { position: relative; height: 290px; margin: 20px auto 16px; display: grid; place-items: center; overflow: hidden; background: #12283d; border: 12px solid #d7e1ea; border-radius: 50%; box-shadow: inset 0 0 34px rgba(75,188,151,.16),0 12px 28px rgba(23,54,93,.16); }
.radar-screen::before,.radar-screen::after { content: ""; position: absolute; inset: 16%; border: 1px solid rgba(122,210,181,.3); border-radius: 50%; }
.radar-screen::after { inset: 32%; }
.radar-crosshair { position: absolute; width: 64%; height: 1px; background: rgba(122,210,181,.28); }
.radar-crosshair::after { content: ""; position: absolute; left: 50%; top: -32%; width: 1px; height: 65%; background: rgba(122,210,181,.28); }
.radar-sweep { position: absolute; width: 46%; height: 1px; left: 50%; top: 50%; transform-origin: left center; background: linear-gradient(90deg,rgba(122,210,181,.7),transparent); animation: sweep 4.5s linear infinite; }
.radar-message { position: relative; z-index: 1; color: rgba(201,239,224,.72); font-size: 1.05rem; }
.is-ping .radar-screen { background: #7f1b3d; box-shadow: inset 0 0 40px rgba(255,255,255,.2),0 0 0 5px rgba(178,31,75,.15); }
.is-ping .radar-message { color: #fff; font-weight: 800; }
.is-ping .radar-pulse { background: #ffcad7; animation-duration: .45s; }
.has-false-alarm .radar-screen { background: #6a3c17; }
.radar-help { margin: 0; color: var(--muted); line-height: 1.4; }
.fitts-game { text-align: center; }
.fitts-prompt { margin: 14px 0; color: var(--muted); }
.fitts-stage { position: relative; height: 360px; margin-top: 10px; overflow: hidden; background: repeating-linear-gradient(0deg,rgba(23,54,93,.025) 0,rgba(23,54,93,.025) 1px,transparent 1px,transparent 36px),repeating-linear-gradient(90deg,rgba(23,54,93,.025) 0,rgba(23,54,93,.025) 1px,transparent 1px,transparent 36px),#f9fbfd; border: 1px solid var(--border); border-radius: 14px; }
.fitts-axis-label { position: absolute; right: 13px; bottom: 10px; color: #94a0ae; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; }
.fitts-target { position: absolute; padding: 0; transform: translate(-50%,-50%); border: 4px solid #fff; border-radius: 50%; background: var(--maroon); box-shadow: 0 7px 0 rgba(113,16,45,.22),0 0 0 2px var(--maroon); cursor: pointer; transition: transform 120ms ease,box-shadow 120ms ease; }
.fitts-target:hover { transform: translate(-50%,-50%) scale(1.07); }
.fitts-target.is-large { width: 86px; height: 86px; }
.fitts-target.is-small { width: 42px; height: 42px; }
.fitts-target.is-far { background: var(--navy); box-shadow: 0 7px 0 rgba(23,54,93,.22),0 0 0 2px var(--navy); }
@keyframes pulse { 50% { transform: scale(1.45); opacity: .55; } }
@keyframes shake { 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }
@keyframes radarPulse { 50% { box-shadow: 0 0 0 9px rgba(57,114,78,0); } }
@keyframes sweep { to { transform: rotate(360deg); } }

@media (max-width: 980px) {
  .workflow-grid,.simple-data-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .site-header { min-height: 62px; }
  .connection-status { display: none; }
  .page-shell,.teacher-shell { width: min(100% - 20px,1120px); margin-top: 18px; }
  .game-picker-view { margin-top: 0; padding: 22px 16px 18px; }
  .picker-hero { align-items: flex-start; }
  .picker-prompt { width: 78px; height: 78px; flex-basis: 78px; border-radius: 18px; }
  .picker-prompt span { font-size: 2.4rem; }
  .picker-prompt small { font-size: .62rem; }
  .experiment-list,.metrics-grid,.setup-grid { grid-template-columns: 1fr; }
  .experiment-card { grid-template-columns: 64px 1fr; min-height: 0; padding: 15px; gap: 12px; }
  .game-card-visual { min-height: 185px; padding: 9px; }
  .game-card-glyph { font-size: 3.2rem; }
  .card-topline { flex-direction: column; gap: 7px; }
  .module-status { align-self: flex-start; }
  .wide-field { grid-column: auto; }
  .lobby-header,.experiment-header,.dashboard-simple-header,.live-data-heading,.section-row { flex-direction: column; }
  .trial-progress { width: 100%; text-align: left; }
  .share-content,.simple-dashboard .control-grid { grid-template-columns: 1fr; }
  .setup-guide-grid { grid-template-columns: 1fr; }
  .teacher-note { align-items: flex-start; flex-direction: column; gap: 4px; }
  .experiment-overview { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .choice-buttons { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .game-toolbar { align-items: flex-start; flex-direction: column; gap: 4px; }
  .round-timer { text-align: left; }
  .number-grid,.dual-grid { gap: 7px; padding: 9px; }
  .number-cell,.dual-cell { min-height: 55px; font-size: 1.1rem; }
  .radar-screen { height: min(72vw,280px); border-width: 8px; }
  .fitts-stage { height: 300px; }
}
@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after { scroll-behavior: auto!important; animation-duration: .001ms!important; animation-iteration-count: 1!important; transition-duration: .001ms!important; }
}

.number-grid.is-baseline-grid { grid-template-columns: repeat(4,minmax(0,1fr)); }
.completion-surface { max-width: 900px; margin: 4vh auto 0; padding: clamp(30px,6vw,58px); text-align: center; }
.completion-mark { width: 58px; height: 58px; margin: 0 auto 18px; display: grid; place-items: center; color: #fff; background: var(--green); border-radius: 50%; font-size: 1.8rem; font-weight: 800; }
.comparison-result { margin: 28px auto; display: grid; gap: 15px; text-align: left; }
.comparison-heading { padding: 16px 18px; display: grid; gap: 5px; background: var(--surface-blue); border-radius: 11px; }
.comparison-heading span { color: var(--maroon); font-size: .7rem; font-weight: 800; letter-spacing: .1em; }
.comparison-heading strong { color: var(--navy); font-size: 1rem; line-height: 1.4; }
.comparison-cards { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; }
.comparison-card { padding: 16px; background: #fff; border: 1px solid var(--border); border-radius: 11px; }
.comparison-card h3 { margin-bottom: 12px; color: var(--navy); }
.comparison-card p { margin: 8px 0 0; display: flex; align-items: baseline; justify-content: space-between; gap: 14px; color: var(--muted); }
.comparison-card p strong { color: var(--maroon); font-variant-numeric: tabular-nums; }
.comparison-conclusion { margin: 0; padding: 13px 16px; color: var(--navy); background: #edf6f0; border-left: 4px solid var(--green); border-radius: 9px; line-height: 1.5; }
@media (max-width: 620px) { .comparison-cards { grid-template-columns: 1fr; } }