:root {
  --navy: #102f49;
  --blue: #2378a5;
  --teal: #287d78;
  --gold: #d49120;
  --red: #b44f45;
  --ink: #17212b;
  --muted: #5b6b79;
  --line: #d1dae2;
  --surface: #ffffff;
  --soft: #f3f6f8;
  --green-soft: #e8f3ef;
  --red-soft: #faece9;
  --shadow: 0 8px 24px rgba(16, 47, 73, 0.08);
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: #f6f8fa;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: #f6f8fa; }
button, input, select { font: inherit; }
button { cursor: pointer; }
.hidden { display: none !important; }
.eyebrow { display: block; color: var(--blue); font-size: 0.78rem; font-weight: 700; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }

.student-shell { width: min(760px, 100%); min-height: 100vh; margin: 0 auto; background: var(--surface); }
.student-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 86px; padding: 18px 22px; border-bottom: 1px solid var(--line); }
.student-header h1 { margin: 3px 0 0; color: var(--navy); font-size: 1.55rem; }
.connection-status { color: var(--muted); font-size: 0.82rem; font-weight: 700; text-align: right; }
.connection-status.ok { color: var(--teal); }
.connection-status.error { color: var(--red); }
#studentApp { padding: 22px; }

.join-panel { max-width: 520px; margin: 6vh auto 0; }
.join-panel h2 { color: var(--navy); font-size: 1.7rem; }
.join-panel p { color: var(--muted); line-height: 1.5; }
.field { margin-top: 18px; }
.field label { display: block; margin-bottom: 7px; color: var(--navy); font-weight: 700; }
.field input { width: 100%; min-height: 52px; padding: 12px 14px; border: 1px solid #aebcc7; border-radius: 6px; background: #fff; color: var(--ink); font-size: 1.05rem; }
.field input:focus { outline: 3px solid rgba(35, 120, 165, 0.18); border-color: var(--blue); }
.form-error { min-height: 22px; margin-top: 12px; color: var(--red); font-weight: 700; }

.button { min-height: 44px; padding: 10px 16px; border: 1px solid transparent; border-radius: 6px; background: var(--blue); color: #fff; font-weight: 700; }
.button:hover { filter: brightness(0.95); }
.button:disabled { cursor: not-allowed; opacity: 0.5; }
.button.secondary { border-color: #b8c6d0; background: #fff; color: var(--navy); }
.button.danger { background: var(--red); }
.button.gold { background: var(--gold); }
.join-button { width: 100%; min-height: 54px; margin-top: 20px; }

.waiting { padding: 8vh 0; text-align: center; }
.waiting-mark { width: 70px; height: 70px; margin: 0 auto 24px; border: 5px solid #d7e5ec; border-top-color: var(--blue); border-radius: 50%; animation: spin 1.2s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.waiting h2 { color: var(--navy); }
.waiting p { color: var(--muted); line-height: 1.5; }

.student-progress { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.category-chip { display: inline-flex; align-items: center; min-height: 30px; padding: 5px 10px; border-radius: 4px; color: #fff; font-size: 0.82rem; font-weight: 700; }
.question-counter { color: var(--muted); font-size: 0.86rem; font-weight: 700; }
.timer-line { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px; margin: 0 0 18px; }
.timer-track { height: 8px; overflow: hidden; border-radius: 4px; background: #e3e9ed; }
.timer-fill { height: 100%; width: 100%; background: var(--teal); transition: width 0.3s linear; }
.timer-value { min-width: 48px; color: var(--navy); font-size: 1.1rem; font-weight: 700; text-align: right; }
.student-question { color: var(--navy); font-size: clamp(1.35rem, 5vw, 2rem); line-height: 1.25; }
.question-image { display: block; width: 100%; max-height: 34vh; margin: 16px auto; object-fit: contain; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.options { display: grid; gap: 10px; margin-top: 18px; }
.option { display: grid; grid-template-columns: 42px 1fr; align-items: center; gap: 10px; width: 100%; min-height: 62px; padding: 10px 12px; border: 1px solid #b9c7d1; border-radius: 6px; background: #fff; color: var(--ink); text-align: left; font-weight: 700; }
.option:hover:not(:disabled) { border-color: var(--blue); background: #f1f8fb; }
.option:disabled { cursor: default; opacity: 1; }
.option-letter { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 4px; background: #e6edf2; color: var(--navy); }
.option.selected { border: 2px solid var(--blue); background: #edf7fb; }
.option.correct { border: 2px solid var(--teal); background: var(--green-soft); }
.option.incorrect { border: 2px solid var(--red); background: var(--red-soft); }
.answer-note { margin-top: 14px; padding: 12px 14px; border-left: 4px solid var(--blue); background: #eef6fa; color: var(--navy); font-weight: 700; }
.explanation { margin-top: 18px; padding: 16px; border: 1px solid #b8d4df; border-radius: 6px; background: #f0f7fa; line-height: 1.5; }

.piece-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin: 18px 0; }
.piece { min-height: 56px; padding: 8px 4px; border: 2px solid var(--line); border-radius: 6px; background: #fff; color: var(--muted); text-align: center; font-size: 0.72rem; font-weight: 700; }
.piece.earned { color: #fff; }
.score-line { display: flex; justify-content: center; gap: 22px; margin-top: 18px; color: var(--navy); font-weight: 700; }
.individual-score { padding: 16px; border: 1px solid var(--line); border-radius: 6px; background: var(--soft); }
.identity-code { display: inline-block; margin-top: 16px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 6px; background: var(--soft); color: var(--navy); }

.teacher-topbar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 88px; padding: 16px 28px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,0.97); }
.teacher-topbar h1 { margin: 3px 0 0; color: var(--navy); font-size: 1.7rem; }
.top-actions { display: flex; align-items: center; gap: 10px; }
.jump-label { color: var(--muted); font-size: 0.84rem; font-weight: 700; }
.top-actions select { min-width: 92px; min-height: 42px; padding: 7px 10px; border: 1px solid #aebcc7; border-radius: 6px; background: #fff; }
.teacher-shell { width: min(1440px, 100%); margin: 0 auto; padding: 24px 28px 36px; }
.notice { margin-bottom: 16px; padding: 12px 15px; border: 1px solid #e3c16f; border-radius: 6px; background: #fff6dd; color: #6d4b00; font-weight: 700; }
.mode-panel { display: flex; align-items: center; justify-content: space-between; gap: 26px; margin-bottom: 24px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.mode-panel h2 { margin: 4px 0 0; color: var(--navy); }
.mode-switch { display: grid; grid-template-columns: repeat(2, minmax(220px, 1fr)); gap: 10px; }
.mode-choice { min-height: 76px; padding: 12px 14px; border: 1px solid #aebcc7; border-radius: 6px; background: #fff; color: var(--ink); text-align: left; }
.mode-choice strong, .mode-choice span { display: block; }
.mode-choice strong { color: var(--navy); }
.mode-choice span { margin-top: 5px; color: var(--muted); font-size: 0.8rem; line-height: 1.35; }
.mode-choice.active { border: 2px solid var(--blue); background: #edf7fb; }
.quiz-config { display: grid; grid-template-columns: minmax(190px, .45fr) minmax(360px, 1.2fr) minmax(280px, 1fr); align-items: center; gap: 18px; margin: -6px 0 26px; padding: 16px 18px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.quiz-config label { display: block; margin-top: 4px; color: var(--navy); font-size: 1.05rem; font-weight: 700; }
.quiz-config .network-select { margin: 0; }
.quiz-config p { margin: 0; color: var(--muted); line-height: 1.4; }
.subject-quiz-config { grid-template-columns: minmax(260px, .85fr) minmax(320px, 1.15fr) minmax(280px, 1fr); align-items: end; }
.subject-quiz-config > div { min-width: 0; }
.text-command { margin-top: 2px; padding: 3px 0; border: 0; background: transparent; color: var(--blue); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.session-config { display: grid; grid-template-columns: minmax(180px, .55fr) minmax(250px, .75fr) minmax(310px, 1fr) minmax(260px, .85fr); align-items: center; gap: 18px; margin: -12px 0 26px; padding: 14px 18px; border: 1px solid var(--line); background: var(--soft); }
.session-config strong { display: block; margin-top: 4px; color: var(--navy); }
.session-config p { margin: 0; color: var(--muted); font-size: .82rem; line-height: 1.4; }
.duration-stepper { display: grid; grid-template-columns: 42px minmax(120px, 1fr) 42px; align-items: end; gap: 7px; }
.duration-stepper label { position: relative; }
.duration-stepper input { width: 100%; min-height: 42px; padding: 8px 70px 8px 10px; border: 1px solid #aebcc7; border-radius: 6px; background: #fff; }
.duration-stepper label span { position: absolute; right: 10px; bottom: 12px; color: var(--muted); font-size: .76rem; font-weight: 700; }
.lobby-layout { display: grid; grid-template-columns: minmax(360px, 0.9fr) minmax(480px, 1.4fr); gap: 28px; }
.join-info h2, .teams-panel h2 { color: var(--navy); }
.network-select { width: 100%; min-height: 44px; margin: 8px 0 14px; padding: 8px 10px; border: 1px solid #aebcc7; border-radius: 6px; background: #fff; }
.qr-wrap { position: relative; display: grid; grid-template-columns: 220px 1fr; align-items: center; gap: 20px; padding: 18px 0; }
.projection-trigger { cursor: zoom-in; }
.projection-trigger:focus { outline: 3px solid rgba(35, 120, 165, .2); outline-offset: 4px; }
.expand-cue { position: absolute; right: 4px; top: 22px; display: grid; place-items: center; width: 36px; height: 36px; border: 1px solid #aebcc7; border-radius: 5px; background: #fff; color: var(--navy); font-size: 1.25rem; }
#qrcode { width: 220px; min-height: 220px; padding: 10px; border: 1px solid var(--line); background: #fff; }
#qrcode img, #qrcode canvas { display: block; width: 200px !important; height: 200px !important; }
.join-url { overflow-wrap: anywhere; color: var(--blue); font-size: 1.18rem; font-weight: 700; }
.pin-box { display: inline-flex; flex-direction: column; margin-top: 18px; padding: 10px 16px; border: 1px solid #9bb6c7; border-radius: 6px; background: #edf6fa; color: var(--navy); }
.pin-box span { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; }
.pin-box strong { margin-top: 2px; font-size: 2rem; letter-spacing: 0; }
.secure-note { padding: 10px 12px; border-left: 4px solid var(--teal); background: var(--green-soft); color: #1f5f5a; line-height: 1.45; }
.hint { color: var(--muted); line-height: 1.5; }
.teams-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 16px 0 22px; }
.team-row { display: flex; align-items: center; justify-content: space-between; min-height: 56px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.team-code { color: var(--muted); font-size: 0.78rem; font-weight: 700; }
.empty-state { padding: 28px; border: 1px dashed #aebcc7; border-radius: 6px; color: var(--muted); text-align: center; }
.lobby-actions { display: flex; flex-wrap: wrap; gap: 10px; }

.question-layout { display: grid; grid-template-columns: minmax(0, 1.8fr) minmax(320px, 0.7fr); gap: 24px; }
.question-main, .side-panel { min-width: 0; }
.teacher-question-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 12px; }
.teacher-question { margin: 12px 0 16px; color: var(--navy); font-size: clamp(1.65rem, 2.8vw, 2.6rem); line-height: 1.18; text-align: center; }
.teacher-image { display: block; width: 100%; max-height: 44vh; margin: 12px auto; object-fit: contain; border: 1px solid var(--line); background: #fff; }
.teacher-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.teacher-option { display: grid; grid-template-columns: 40px 1fr; align-items: center; min-height: 72px; padding: 12px; border: 1px solid var(--line); border-radius: 6px; background: #fff; font-weight: 700; }
.teacher-option.correct { border: 2px solid var(--teal); background: var(--green-soft); }
.control-strip { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 10px; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); }
.big-timer { color: var(--navy); font-size: 2.2rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.response-count { margin: 12px 0; color: var(--muted); font-weight: 700; text-align: center; }
.ranking { width: 100%; border-collapse: collapse; background: #fff; }
.ranking th, .ranking td { padding: 10px 8px; border-bottom: 1px solid var(--line); text-align: left; }
.ranking th { color: var(--muted); font-size: 0.78rem; text-transform: uppercase; }
.table-scroll { max-width: 100%; overflow-x: auto; }
.result-ok { color: var(--teal); font-weight: 700; }
.result-bad { color: var(--red); font-weight: 700; }
.teacher-explanation { margin-top: 16px; padding: 16px; border-left: 5px solid var(--blue); background: #edf6fa; line-height: 1.5; }

.preview-dialog { width: min(1120px, calc(100% - 32px)); max-width: none; height: min(94vh, 940px); max-height: none; padding: 0; overflow: hidden; border: 1px solid #aebcc7; border-radius: 6px; background: #fff; box-shadow: 0 24px 70px rgba(16, 47, 73, 0.24); }
.preview-dialog::backdrop { background: rgba(16, 33, 45, 0.58); }
.preview-modal { display: grid; grid-template-rows: auto auto minmax(0, 1fr) auto; height: 100%; }
.preview-modal-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 22px; border-bottom: 1px solid var(--line); }
.preview-modal-header h2 { margin: 3px 0 0; color: var(--navy); font-size: 1.45rem; }
.preview-close { display: grid; place-items: center; width: 44px; height: 44px; padding: 0; border: 1px solid #b8c6d0; border-radius: 6px; background: #fff; color: var(--navy); font-size: 2rem; line-height: 1; }
.preview-close:hover { border-color: var(--blue); background: #f1f8fb; }
.preview-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 13px 22px; border-bottom: 1px solid var(--line); background: var(--soft); }
.preview-toolbar strong, .preview-toolbar span { display: block; }
.preview-toolbar strong { color: var(--navy); }
.preview-toolbar span { margin-top: 3px; color: var(--muted); font-size: 0.8rem; }
.preview-toolbar label { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; color: var(--navy); font-size: 0.82rem; font-weight: 700; }
.preview-toolbar select { min-width: 92px; min-height: 40px; padding: 7px 10px; border: 1px solid #aebcc7; border-radius: 6px; background: #fff; }
.preview-toolbar-actions { display: flex; align-items: center; gap: 12px; }
.preview-viewport { min-height: 0; padding: 24px; overflow: auto; background: #e9eef2; }
.preview-device { width: min(760px, 100%); min-height: 100%; margin: 0 auto; overflow: hidden; border: 1px solid #bdc9d2; border-radius: 6px; background: #fff; box-shadow: var(--shadow); }
.preview-device-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 76px; padding: 15px 20px; border-bottom: 1px solid var(--line); }
.preview-device-header strong { display: block; margin-top: 3px; color: var(--navy); }
.preview-private-badge { padding: 6px 9px; border: 1px solid #9bb6c7; border-radius: 4px; background: #edf6fa; color: var(--navy); font-size: 0.78rem; font-weight: 700; }
.preview-question { padding: 22px; }
.preview-timer { opacity: 0.72; }
.preview-answer-correct { border-color: var(--teal); background: var(--green-soft); color: #1f5f5a; }
.preview-answer-incorrect { border-color: var(--red); background: var(--red-soft); color: #7f3029; }
.preview-controls { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 14px 22px; border-top: 1px solid var(--line); background: #fff; }
.preview-controls .button { min-width: 142px; }

.side-panel { min-width: 0; }
.distribution-panel { margin-bottom: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.side-section-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.side-section-head h3, .ranking-panel h2 { margin: 3px 0 0; color: var(--navy); }
.distribution-toggle { display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: 0.78rem; font-weight: 700; }
.distribution-toggle input { width: 18px; height: 18px; }
.distribution-head-actions { display: flex; align-items: center; gap: 8px; }
.icon-button.compact { width: 34px; height: 34px; font-size: 1rem; }
.distribution-bars { display: grid; gap: 9px; }
.distribution-bars.clickable { cursor: zoom-in; }
.distribution-row { display: grid; grid-template-columns: 28px minmax(80px, 1fr) 64px; align-items: center; gap: 8px; }
.distribution-bar-content { min-width: 0; }
.distribution-row strong { color: var(--navy); font-size: 0.78rem; text-align: right; font-variant-numeric: tabular-nums; }
.distribution-letter { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 4px; background: #e6edf2; color: var(--navy); font-weight: 700; }
.distribution-track { height: 18px; overflow: hidden; border-radius: 4px; background: #e4eaee; }
.distribution-fill { height: 100%; min-width: 0; background: var(--blue); transition: width 0.25s ease; }
.distribution-row.closed .distribution-fill { background: #8998a3; }
.distribution-row.correct .distribution-letter { background: var(--teal); color: #fff; }
.distribution-row.correct .distribution-fill { background: var(--teal); }
.distribution-pending { margin-top: 11px; color: var(--muted); font-size: 0.82rem; text-align: right; }
.distribution-hidden { display: flex; align-items: center; gap: 12px; min-height: 62px; padding: 12px; border: 1px dashed #aebcc7; color: var(--muted); }
.distribution-hidden strong { color: var(--navy); font-size: 1.3rem; white-space: nowrap; }
.distribution-hidden span { font-size: 0.8rem; line-height: 1.35; }
.ranking-scroll { max-height: 48vh; overflow: auto; }
.compact-ranking { min-width: 0; width: 100%; table-layout: fixed; }
.compact-ranking th:first-child, .compact-ranking td:first-child { width: 2.25rem; }
.compact-ranking th:nth-child(3), .compact-ranking td:nth-child(3) { width: 5.6rem; text-align: center; }
.compact-ranking th:last-child, .compact-ranking td:last-child { width: 4.6rem; text-align: right; }
.compact-ranking td:nth-child(2) { overflow-wrap: anywhere; }
.auto-next-note { padding: 9px 12px; border: 1px solid #9bb6c7; background: #edf6fa; color: var(--navy); font-size: .82rem; }

.manager-dialog, .projection-dialog { width: min(920px, calc(100% - 32px)); max-width: none; max-height: 94vh; padding: 0; overflow: hidden; border: 1px solid #aebcc7; border-radius: 6px; background: #fff; box-shadow: 0 24px 70px rgba(16, 47, 73, .24); }
.manager-dialog::backdrop, .projection-dialog::backdrop { background: rgba(16, 33, 45, .68); }
.manager-modal, .projection-modal { display: grid; grid-template-rows: auto minmax(0, 1fr); max-height: 94vh; }
.subject-manager-body { padding: 22px; overflow-y: auto; }
.subject-rows { display: grid; gap: 10px; margin: 18px 0 24px; }
.subject-row { display: grid; grid-template-columns: minmax(0, 1fr) auto 42px; align-items: center; gap: 10px; padding: 12px; border: 1px solid var(--line); background: var(--soft); }
.subject-row > div { min-width: 0; }
.subject-row input, .subject-create-row input { width: 100%; min-height: 42px; padding: 8px 10px; border: 1px solid #aebcc7; border-radius: 6px; background: #fff; color: var(--ink); font-weight: 700; }
.subject-row span { display: block; margin-top: 5px; color: var(--muted); font-size: .78rem; }
.subject-create-row { padding-top: 18px; border-top: 1px solid var(--line); }
.subject-create-row > label { display: block; margin-bottom: 7px; color: var(--navy); font-weight: 700; }
.subject-create-row > div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 9px; }

.projection-dialog { width: min(1180px, calc(100% - 32px)); }
.join-projection-body { display: grid; grid-template-columns: minmax(420px, .85fr) minmax(380px, 1fr); align-items: center; gap: 48px; min-height: 650px; padding: 42px 54px; }
.qrcode-large { width: 444px; min-height: 444px; padding: 12px; border: 1px solid var(--line); background: #fff; }
.qrcode-large img, .qrcode-large canvas { display: block; width: 420px !important; height: 420px !important; }
.projection-access { text-align: center; }
.projection-access > span { display: block; color: var(--muted); font-size: 1rem; font-weight: 700; text-transform: uppercase; }
.projection-access > strong { display: block; margin: 12px 0 22px; color: var(--navy); font-size: clamp(4.5rem, 9vw, 8rem); font-variant-numeric: tabular-nums; letter-spacing: 0; }
.projection-access .join-url { font-size: 1.35rem; }

.distribution-dialog { width: min(1320px, calc(100% - 32px)); }
.distribution-large { min-height: 650px; padding: 30px 48px 42px; overflow-y: auto; }
.distribution-question span { color: var(--muted); font-weight: 700; }
.distribution-question h3 { margin: 5px 0 24px; color: var(--navy); font-size: clamp(1.35rem, 2.4vw, 2.2rem); line-height: 1.22; }
.large-bars { gap: 15px; }
.distribution-row.large { grid-template-columns: 54px minmax(0, 1fr) 110px; gap: 14px; }
.distribution-row.large .distribution-letter { width: 54px; height: 54px; font-size: 1.4rem; }
.distribution-row.large .distribution-option { display: block; margin-bottom: 6px; color: var(--navy); font-size: 1.05rem; font-weight: 700; }
.distribution-row.large .distribution-track { height: 28px; }
.distribution-row.large > strong { font-size: 1.05rem; }
.winner-stage { display: flex; align-items: center; justify-content: center; gap: 22px; margin-top: 30px; padding: 20px; border-top: 1px solid var(--line); text-align: left; }
.trophy { font-size: 4.5rem; line-height: 1; }
.winner-stage div > span, .winner-stage strong, .winner-stage small { display: block; }
.winner-stage div > span { color: var(--muted); font-size: .82rem; font-weight: 700; text-transform: uppercase; }
.winner-stage strong { margin: 4px 0; color: var(--navy); font-size: 1.8rem; }
.winner-stage small { color: var(--muted); font-size: .95rem; }

.editor-dialog { width: min(1440px, calc(100% - 24px)); max-width: none; height: min(96vh, 1040px); max-height: none; padding: 0; overflow: hidden; border: 1px solid #aebcc7; border-radius: 6px; background: #fff; box-shadow: 0 24px 70px rgba(16, 47, 73, 0.24); }
.editor-dialog::backdrop { background: rgba(16, 33, 45, 0.58); }
.editor-modal { display: grid; grid-template-rows: auto auto minmax(0, 1fr) auto; height: 100%; }
.editor-notice { margin: 12px 18px 0; }
.editor-workspace { display: grid; grid-template-columns: 310px minmax(0, 1fr); min-height: 0; overflow: hidden; }
.editor-sidebar { display: grid; grid-template-rows: auto minmax(0, 1fr); min-height: 0; padding: 18px; border-right: 1px solid var(--line); background: var(--soft); }
.editor-sidebar-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-bottom: 14px; }
.editor-sidebar-head h3 { margin: 3px 0 0; color: var(--navy); }
.editor-question-list { display: grid; align-content: start; gap: 7px; min-height: 0; overflow-y: auto; }
.editor-question-item { display: grid; grid-template-columns: 32px minmax(0, 1fr); align-items: center; gap: 8px; width: 100%; min-height: 54px; padding: 8px; border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--ink); text-align: left; }
.editor-question-item > span { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 4px; background: #e6edf2; color: var(--navy); font-weight: 700; }
.editor-question-item strong { overflow: hidden; font-size: 0.82rem; line-height: 1.3; text-overflow: ellipsis; white-space: nowrap; }
.editor-question-item.active { border: 2px solid var(--blue); background: #edf7fb; }
.editor-fields { min-width: 0; padding: 20px 24px 36px; overflow-y: auto; }
.editor-section { padding: 0 0 20px; margin-bottom: 20px; border: 0; border-bottom: 1px solid var(--line); }
details.editor-section summary { margin-bottom: 16px; color: var(--navy); font-size: 1.05rem; font-weight: 700; cursor: pointer; }
.editor-meta-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.editor-wide { grid-column: 1 / -1; }
.editor-subjects { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 0; padding: 12px; border: 1px solid var(--line); }
.editor-subjects legend { padding: 0 6px; color: var(--navy); font-size: .82rem; font-weight: 700; }
.editor-subjects label { display: flex; align-items: center; gap: 7px; }
.editor-subjects input { width: 18px; height: 18px; }
.editor-fields label { display: block; color: var(--navy); font-size: 0.82rem; font-weight: 700; }
.editor-fields input[type="text"], .editor-fields input[type="number"], .editor-fields select, .editor-fields textarea { width: 100%; min-height: 42px; margin-top: 6px; padding: 9px 11px; border: 1px solid #aebcc7; border-radius: 6px; background: #fff; color: var(--ink); }
.editor-fields textarea { resize: vertical; line-height: 1.45; }
.editor-fields input:focus, .editor-fields select:focus, .editor-fields textarea:focus { outline: 3px solid rgba(35, 120, 165, 0.16); border-color: var(--blue); }
.editor-category-list { display: grid; gap: 8px; margin-bottom: 12px; }
.editor-category-row { display: grid; grid-template-columns: 48px minmax(0, 1fr) 42px; align-items: end; gap: 8px; }
.editor-category-row input[type="color"] { width: 48px; height: 42px; padding: 3px; border: 1px solid #aebcc7; border-radius: 6px; background: #fff; }
.editor-question-toolbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.editor-question-toolbar h3 { margin: 4px 0 0; color: var(--navy); }
.editor-question-toolbar > div:last-child { display: flex; gap: 6px; }
.icon-button { display: grid; place-items: center; width: 42px; height: 42px; padding: 0; border: 1px solid #b8c6d0; border-radius: 6px; background: #fff; color: var(--navy); font-size: 1.15rem; font-weight: 700; }
.icon-button:hover:not(:disabled) { border-color: var(--blue); background: #f1f8fb; }
.icon-button:disabled { cursor: not-allowed; opacity: 0.45; }
.icon-button.danger-outline { border-color: #ddb2ad; color: var(--red); }
.question-settings { margin: 14px 0; }
.editor-image-preview { display: block; width: min(720px, 100%); max-height: 320px; margin: 14px auto; object-fit: contain; border: 1px solid var(--line); background: #fff; }
.editor-options { display: grid; gap: 9px; margin: 16px 0; padding: 14px; border: 1px solid var(--line); }
.editor-options legend { padding: 0 7px; color: var(--navy); font-size: 0.82rem; font-weight: 700; }
.editor-option-row { display: grid !important; grid-template-columns: 22px 38px minmax(0, 1fr); align-items: center; gap: 9px; }
.editor-option-row input[type="radio"] { width: 19px; height: 19px; }
.editor-option-row input[type="text"] { margin-top: 0; }
.editor-controls { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 14px 20px; border-top: 1px solid var(--line); background: #fff; }
.editor-controls > span { color: var(--muted); font-size: 0.82rem; }
.editor-controls > div { display: flex; gap: 9px; }

.mode-switch.three { grid-template-columns: repeat(3, minmax(205px, 1fr)); }
.auction-config { display: grid; grid-template-columns: 180px 220px 1fr; align-items: end; gap: 18px; margin: -6px 0 26px; padding: 16px 18px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.config-field label { display: block; margin-bottom: 6px; color: var(--navy); font-size: 0.82rem; font-weight: 700; }
.config-field input { width: 100%; min-height: 42px; padding: 8px 10px; border: 1px solid #aebcc7; border-radius: 6px; }
.check-field { display: flex; align-items: center; gap: 9px; min-height: 42px; color: var(--navy); font-weight: 700; }
.check-field input { width: 19px; height: 19px; }

.auction-stage h2, .auction-stage h3 { color: var(--navy); }
.auction-stage-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; margin-bottom: 22px; }
.auction-stage-head h2 { margin: 5px 0 0; font-size: 2rem; }
.role-counts { display: flex; gap: 10px; }
.role-counts span { min-width: 142px; padding: 12px; border: 1px solid var(--line); border-radius: 6px; background: #fff; color: var(--muted); text-align: center; }
.role-counts strong { display: block; color: var(--navy); font-size: 1.55rem; }
.auction-instruction { max-width: 820px; margin: 48px auto; padding: 22px; border-left: 5px solid var(--gold); background: #fff8e8; color: var(--ink); font-size: 1.08rem; line-height: 1.55; }
.auction-instruction p { margin: 8px 0 0; }
.auction-open { min-width: 310px; }
.auction-live-timer { min-width: 100px; color: var(--navy); font-size: 2.4rem; font-weight: 700; text-align: right; font-variant-numeric: tabular-nums; }
.market-quotes { display: grid; grid-template-columns: minmax(220px, 1fr) 150px minmax(220px, 1fr); align-items: stretch; gap: 14px; margin-bottom: 22px; }
.quote, .spread { display: flex; flex-direction: column; justify-content: center; min-height: 118px; padding: 16px; border: 1px solid var(--line); border-radius: 6px; background: #fff; text-align: center; }
.quote span, .spread span { color: var(--muted); font-size: 0.78rem; font-weight: 700; text-transform: uppercase; }
.quote strong { margin: 4px 0; font-size: 2.5rem; }
.quote small { color: var(--muted); }
.quote.bid { border-top: 5px solid var(--blue); }
.quote.bid strong { color: var(--blue); }
.quote.ask { border-top: 5px solid var(--red); }
.quote.ask strong { color: var(--red); }
.spread { background: var(--soft); }
.spread strong { margin-top: 4px; color: var(--navy); font-size: 1.55rem; }
.auction-live-grid, .auction-results-grid { display: grid; grid-template-columns: minmax(0, 1.8fr) minmax(280px, 0.7fr); gap: 20px; }
.chart-panel, .trade-panel, .result-explanation { min-width: 0; padding: 16px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.chart-panel h3, .trade-panel h3, .result-explanation h3 { margin-bottom: 12px; font-size: 1.05rem; }
.market-canvas { display: block; width: 100%; height: 300px; }
.trade-feed { display: grid; gap: 7px; max-height: 288px; overflow-y: auto; }
.trade-feed div { display: flex; justify-content: space-between; gap: 16px; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.trade-feed strong { color: var(--teal); }
.market-status { display: flex; justify-content: center; gap: 38px; margin: 18px 0 0; color: var(--muted); }
.market-status strong { color: var(--navy); }
.equilibrium-badge { padding: 12px 16px; border: 1px solid #d9bc74; border-radius: 6px; background: #fff8e8; }
.equilibrium-badge span, .equilibrium-badge strong { display: block; }
.equilibrium-badge span { color: #765814; font-size: 0.75rem; font-weight: 700; text-transform: uppercase; }
.equilibrium-badge strong { margin-top: 4px; color: var(--navy); }
.discovery-badge { min-width: 230px; padding: 12px 16px; border: 1px dashed #7f98a9; border-radius: 6px; background: #f5f8fa; }
.discovery-badge span, .discovery-badge strong { display: block; }
.discovery-badge span { color: var(--muted); font-size: 0.75rem; font-weight: 700; text-transform: uppercase; }
.discovery-badge strong { margin-top: 4px; color: var(--navy); }
.welfare-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px; }
.welfare-grid > div { padding: 15px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.welfare-grid span, .welfare-grid strong { display: block; }
.welfare-grid span { color: var(--muted); font-size: 0.78rem; font-weight: 700; }
.welfare-grid strong { margin-top: 5px; color: var(--navy); font-size: 1.7rem; }
.welfare-grid .efficiency { border-color: #90c2af; background: var(--green-soft); }
.observed-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px; }
.observed-grid > div { min-width: 0; padding: 15px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.observed-grid span, .observed-grid strong, .observed-grid small { display: block; }
.observed-grid span { color: var(--muted); font-size: 0.78rem; font-weight: 700; }
.observed-grid strong { margin-top: 5px; color: var(--navy); font-size: 1.55rem; }
.observed-grid small { margin-top: 3px; color: var(--muted); }
.observed-grid .efficiency { border-color: #90c2af; background: var(--green-soft); }
.result-explanation { line-height: 1.5; }
.result-explanation p { color: var(--muted); }
.result-explanation .theory-note { padding-top: 10px; border-top: 1px solid var(--line); color: var(--navy); font-weight: 700; }
.evolution-table { margin-top: 20px; }
.round-prices { margin-top: 12px; padding: 11px 14px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.round-prices summary { color: var(--navy); font-weight: 700; cursor: pointer; }
.round-prices .transaction-table { margin-top: 10px; }
.equilibrium-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 18px; }
.equilibrium-summary > div { padding: 16px; border-left: 5px solid var(--gold); background: #fff8e8; }
.equilibrium-summary span, .equilibrium-summary strong { display: block; }
.equilibrium-summary span { color: #765814; font-size: 0.78rem; font-weight: 700; text-transform: uppercase; }
.equilibrium-summary strong { margin-top: 5px; color: var(--navy); font-size: 1.6rem; }
.convergence-conclusion { margin-bottom: 20px; padding: 17px 20px; border-left: 5px solid var(--teal); background: #eef7f5; line-height: 1.5; }
.convergence-conclusion > strong { display: block; color: var(--navy); font-size: 1.05rem; }
.convergence-conclusion p { margin: 7px 0 0; color: #405260; }
.final-convergence-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.final-convergence-grid .wide-chart { grid-column: 1 / -1; }
.final-market-chart { margin-top: 18px; }
.compact-chart { height: 290px; }
.transaction-table, .round-table { margin-top: 20px; }
.final-price-chart { margin-top: 22px; }

.auction-chip { background: var(--navy); }
.mobile-auction { padding-bottom: 24px; }
.auction-identity { display: grid; grid-template-columns: 1fr auto; align-items: center; margin: 16px 0; padding: 16px; border: 1px solid var(--line); border-left-width: 6px; border-radius: 6px; background: #fff; }
.auction-identity.buyer { border-left-color: var(--blue); }
.auction-identity.seller { border-left-color: var(--red); }
.auction-identity span { color: var(--navy); font-weight: 700; }
.auction-identity strong { grid-row: span 2; color: var(--navy); font-size: 2rem; }
.auction-identity small { color: var(--muted); }
.auction-rule { padding: 14px 16px; border-left: 4px solid var(--gold); background: #fff8e8; line-height: 1.45; }
.auction-rule p { margin: 6px 0 0; color: var(--muted); }
.waiting.compact { padding: 38px 0 10px; }
.waiting.compact .waiting-mark { width: 48px; height: 48px; margin-bottom: 14px; border-width: 4px; }
.auction-mobile-timer { margin: 8px 0; color: var(--navy); font-size: 2rem; font-weight: 700; text-align: center; font-variant-numeric: tabular-nums; }
.mobile-quotes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin: 14px 0; }
.mobile-quotes > div { padding: 13px; border: 1px solid var(--line); border-radius: 6px; background: #fff; text-align: center; }
.mobile-quotes .bid { border-top: 4px solid var(--blue); }
.mobile-quotes .ask { border-top: 4px solid var(--red); }
.mobile-quotes span, .mobile-quotes strong { display: block; }
.mobile-quotes span { color: var(--muted); font-size: 0.76rem; font-weight: 700; text-transform: uppercase; }
.mobile-quotes strong { margin-top: 4px; color: var(--navy); font-size: 1.55rem; }
.own-order { margin: 12px 0; padding: 10px 12px; border: 1px solid #9bb6c7; border-radius: 6px; background: #edf6fa; color: var(--navy); text-align: center; }
.auction-order-form { margin-top: 14px; }
.auction-order-form label { display: block; margin-bottom: 7px; color: var(--navy); font-weight: 700; }
.price-entry { display: grid; grid-template-columns: minmax(0, 1fr) 26px auto; align-items: center; gap: 8px; }
.price-entry input { min-width: 0; min-height: 52px; padding: 10px 12px; border: 1px solid #aebcc7; border-radius: 6px; font-size: 1.1rem; }
.accept-market { width: 100%; margin-top: 8px; background: var(--teal); }
.mobile-market-history { margin-top: 20px; padding-top: 14px; border-top: 1px solid var(--line); }
.mobile-market-history h3 { color: var(--navy); font-size: 1rem; }
.mobile-trades { display: grid; gap: 7px; }
.mobile-trades span { display: flex; justify-content: space-between; padding: 8px 10px; background: var(--soft); }
.centered { text-align: center; }
.trade-success, .personal-result { margin: 16px 0; padding: 18px; border: 1px solid #90c2af; border-radius: 6px; background: var(--green-soft); text-align: center; }
.trade-success span, .trade-success strong, .personal-result span, .personal-result strong { display: block; }
.trade-success strong, .personal-result strong { margin-top: 4px; color: var(--navy); font-size: 2rem; }
.trade-success p, .personal-result p { margin: 8px 0 0; }
.mobile-result-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 9px; margin: 14px 0; }
.mobile-result-grid > div { padding: 12px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.mobile-result-grid span, .mobile-result-grid strong { display: block; }
.mobile-result-grid span { color: var(--muted); font-size: 0.72rem; font-weight: 700; }
.mobile-result-grid strong { margin-top: 4px; color: var(--navy); font-size: 1.25rem; }
.auction-finished-mobile h2 { margin-top: 5px; color: var(--navy); }
.round-mini-list { display: grid; gap: 7px; }
.round-mini-list div { display: flex; justify-content: space-between; gap: 12px; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.round-mini-list span { color: var(--muted); }

@media (max-width: 1100px) {
  .teacher-topbar { position: static; align-items: flex-start; flex-direction: column; }
  .top-actions { width: 100%; flex-wrap: wrap; }
  .lobby-layout, .question-layout { grid-template-columns: 1fr; }
  .mode-panel { align-items: stretch; flex-direction: column; }
  .mode-switch.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .auction-config { grid-template-columns: repeat(2, 1fr); }
  .quiz-config { grid-template-columns: 1fr; }
  .session-config { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .join-projection-body { grid-template-columns: 1fr; justify-items: center; gap: 24px; padding: 28px; }
  .check-field { grid-column: 1 / -1; }
  .auction-live-grid, .auction-results-grid { grid-template-columns: 1fr; }
  .final-convergence-grid { grid-template-columns: 1fr; }
  .final-convergence-grid .wide-chart { grid-column: auto; }
  .qr-wrap { grid-template-columns: 1fr; }
  .preview-toolbar-actions { align-items: flex-end; flex-direction: column; }
  .editor-workspace { grid-template-columns: 240px minmax(0, 1fr); }
}

@media (max-width: 620px) {
  .student-header, #studentApp { padding-left: 16px; padding-right: 16px; }
  .teacher-shell { padding: 18px 14px 28px; }
  .teacher-topbar { padding: 14px; }
  .teacher-options, .teams-list { grid-template-columns: 1fr; }
  .mode-switch { grid-template-columns: 1fr; }
  .mode-switch.three { grid-template-columns: 1fr; }
  .session-config { grid-template-columns: 1fr; }
  .auction-stage-head { flex-direction: column; }
  .role-counts { width: 100%; }
  .role-counts span { flex: 1; min-width: 0; }
  .market-quotes { grid-template-columns: 1fr 90px 1fr; gap: 7px; }
  .quote, .spread { min-height: 90px; padding: 9px; }
  .quote strong { font-size: 1.65rem; }
  .market-status { align-items: center; flex-direction: column; gap: 6px; }
  .welfare-grid { grid-template-columns: repeat(2, 1fr); }
  .observed-grid { grid-template-columns: repeat(2, 1fr); }
  .equilibrium-summary { grid-template-columns: 1fr; }
  .auction-config { grid-template-columns: 1fr; }
  .check-field { grid-column: auto; }
  .piece-row { grid-template-columns: repeat(5, minmax(46px, 1fr)); gap: 5px; overflow-x: auto; }
  .piece { font-size: 0.64rem; }
  .preview-dialog { width: 100%; height: 100%; max-height: 100%; border: 0; border-radius: 0; }
  .preview-modal-header, .preview-toolbar, .preview-controls { padding-left: 14px; padding-right: 14px; }
  .preview-toolbar { align-items: flex-start; flex-direction: column; gap: 10px; }
  .preview-toolbar-actions { align-items: stretch; width: 100%; }
  .preview-toolbar label { width: 100%; justify-content: space-between; }
  .preview-viewport { padding: 10px; }
  .preview-question { padding: 16px; }
  .preview-controls { display: grid; grid-template-columns: 1fr 1.25fr 1fr; gap: 7px; }
  .preview-controls .button { min-width: 0; padding-left: 8px; padding-right: 8px; font-size: 0.78rem; }
  .editor-dialog { width: 100%; height: 100%; max-height: 100%; border: 0; border-radius: 0; }
  .editor-workspace { grid-template-columns: 1fr; overflow-y: auto; }
  .editor-sidebar { grid-template-rows: auto auto; max-height: 250px; border-right: 0; border-bottom: 1px solid var(--line); }
  .editor-question-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .editor-fields { overflow: visible; padding: 16px; }
  .editor-meta-grid { grid-template-columns: 1fr; }
  .editor-wide { grid-column: auto; }
  .editor-controls { align-items: stretch; flex-direction: column; }
  .editor-controls > div { display: grid; grid-template-columns: 1fr 1fr; }
  .manager-dialog, .projection-dialog { width: 100%; height: 100%; max-height: 100%; border: 0; border-radius: 0; }
  .manager-modal, .projection-modal { max-height: 100%; height: 100%; }
  .subject-row { grid-template-columns: minmax(0, 1fr) 42px; }
  .subject-row .button { grid-column: 1 / -1; grid-row: 2; }
  .join-projection-body { min-height: 0; padding: 20px; overflow-y: auto; }
  .qrcode-large { width: 304px; min-height: 304px; padding: 8px; }
  .qrcode-large img, .qrcode-large canvas { width: 286px !important; height: 286px !important; }
  .projection-access > strong { font-size: 4rem; }
  .distribution-large { min-height: 0; padding: 20px 16px 28px; }
  .distribution-row.large { grid-template-columns: 42px minmax(0, 1fr) 72px; gap: 8px; }
  .distribution-row.large .distribution-letter { width: 42px; height: 42px; }
  .winner-stage { align-items: center; flex-direction: column; text-align: center; }
}

/* V14: preparation, settings and classroom are separate workspaces. */
.teacher-page { background: #f4f6f8; }
.teacher-page .teacher-topbar { min-height: 78px; padding: 15px 30px; box-shadow: none; }
.teacher-brand { display: flex; align-items: center; gap: 14px; }
.teacher-brand-mark { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 10px; background: var(--navy); color: white; font-size: 1.35rem; font-weight: 700; }
.teacher-brand .eyebrow { font-size: .67rem; letter-spacing: .1em; color: #6c7d8a; }
.teacher-page .teacher-topbar h1 { margin: 2px 0 0; font-size: 1.45rem; letter-spacing: -.04em; }
.teacher-state-pill { margin-left: auto; padding: 8px 12px; border: 1px solid #d7e0e5; border-radius: 99px; background: #f8fafb; color: #5e6e7d; font-size: .78rem; }
.teacher-workspace { display: grid; grid-template-columns: 224px minmax(0,1fr); min-height: calc(100vh - 79px); }
.teacher-navigation { position: sticky; top: 79px; align-self: start; display: flex; flex-direction: column; min-height: calc(100vh - 79px); padding: 32px 17px 24px; border-right: 1px solid #dce3e8; background: #fff; }
.navigation-label { margin: 0 14px 16px; color: #84919b; font-size: .65rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.teacher-navigation nav { display: grid; gap: 8px; }
.teacher-nav-item { display: flex; align-items: center; gap: 12px; width: 100%; min-height: 58px; padding: 10px 13px; border: 1px solid transparent; border-radius: 8px; background: transparent; color: #526471; text-align: left; }
.teacher-nav-item > span:first-child { display: grid; place-items: center; width: 28px; height: 28px; flex: 0 0 auto; border: 1px solid #dce4e9; border-radius: 7px; font-size: .72rem; font-weight: 700; }
.teacher-nav-item strong { display: block; font-size: .85rem; }
.teacher-nav-item small { display: block; margin-top: 3px; font-size: .71rem; font-weight: 400; }
.teacher-nav-item:hover:not(:disabled) { background: #f4f7f9; }
.teacher-nav-item.active { border-color: #c9dee5; background: #edf5f7; color: #143f52; }
.teacher-nav-item.active > span:first-child { border-color: #204b60; background: #204b60; color: white; }
.teacher-nav-item:disabled { cursor: not-allowed; opacity: .47; }
.navigation-note { margin: auto 12px 0; padding-top: 38px; color: #7c8a95; font-size: .74rem; line-height: 1.6; }
.navigation-note strong { display: block; margin-bottom: 5px; color: #536874; font-size: .75rem; }
.teacher-page .teacher-shell { width: 100%; max-width: 1360px; min-width: 0; padding: 38px 40px 36px; }
.workspace-heading { display: flex; align-items: flex-start; gap: 15px; margin-bottom: 29px; }
.workspace-kicker { margin-top: 5px; padding: 7px 9px; border: 1px solid #d9e2e7; border-radius: 6px; background: white; color: #71828d; font-size: .75rem; font-weight: 700; }
.workspace-heading h2 { margin: 0 0 8px; color: #163749; font-size: clamp(1.6rem,2.3vw,2rem); font-weight: 700; letter-spacing: -.04em; line-height: 1.15; }
.workspace-heading p { margin: 0; color: #6c7b88; font-size: .91rem; line-height: 1.5; }
.preparation-grid { display: grid; grid-template-columns: minmax(0,1fr) 258px; align-items: start; gap: 22px; }
.workspace-card { min-width: 0; padding: 25px; border: 1px solid #dbe3e8; border-radius: 11px; background: #fff; box-shadow: 0 3px 9px rgba(23,50,69,.025); }
.card-heading { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-bottom: 25px; }
.workspace-card .eyebrow { margin-bottom: 7px; color: #7c8c96; font-size: .63rem; letter-spacing: .12em; }
.workspace-card h3 { margin: 0; color: #193b4d; font-size: 1.12rem; line-height: 1.35; }
.catalog-count { color: #82909a; font-size: .73rem; white-space: nowrap; }
.content-selectors { display: grid; grid-template-columns: 1fr; gap: 18px; }
.workspace-field { display: grid; gap: 8px; min-width: 0; }
.workspace-field label, .setting-label { color: #455d6c; font-size: .81rem; font-weight: 700; }
.workspace-field select, .workspace-field input { width: 100%; min-height: 47px; padding: 10px 12px; border: 1px solid #bdcbd4; border-radius: 6px; background: #fff; color: #243f51; font-size: .88rem; }
.workspace-field select:disabled { background: #f7f9fa; color: #97a3ac; border-color: #e0e6eb; }
.workspace-field select:focus, .workspace-field input:focus { outline: 3px solid #dcecf2; border-color: #4a839d; }
.selection-empty { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 230px; padding: 30px 18px; text-align: center; }
.selection-empty .empty-book { margin-bottom: 18px; color: #abbfc8; }
.selection-empty h3 { color: #607784; font-size: 1rem; font-weight: 600; }
.selection-empty p { max-width: 380px; margin: 10px 0 0; color: #8b99a3; font-size: .83rem; line-height: 1.65; }
.selection-empty .button { margin-top: 20px; }
.empty-illustration { margin: 0 0 18px; color: #8eacba; font-size: 2.7rem; }
.library-footer { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; padding-top: 20px; border-top: 1px solid #edf0f3; }
.teacher-page .text-command { margin: 0; text-decoration: none; font-size: .8rem; }
.teacher-page .text-command:hover:not(:disabled) { text-decoration: underline; }
.teacher-page .text-command:disabled { cursor: not-allowed; opacity: .42; }
.teacher-page .button { min-height: 42px; border-radius: 6px; font-size: .82rem; }
.teacher-page .button:not(.secondary):not(.danger):not(.gold) { background: #23576b; }
.teacher-page .button.secondary { border-color: #cbd7df; }
.muted-command { color: #85939f; }
.library-footer .button { margin-left: auto; }
.format-card { padding: 23px 20px; }
.format-card > h3 { margin-bottom: 22px; }
.format-options { display: grid; gap: 10px; }
.format-option { display: flex; align-items: flex-start; gap: 11px; width: 100%; min-height: 75px; padding: 14px 11px; border: 1px solid #dce4e9; border-radius: 7px; background: #fff; color: #254252; text-align: left; }
.format-option strong { display: block; font-size: .83rem; }
.format-option small { display: block; margin-top: 6px; color: #80919d; font-size: .72rem; line-height: 1.4; }
.format-radio { width: 15px; height: 15px; flex-shrink: 0; margin-top: 1px; border: 1px solid #b5c3cd; border-radius: 50%; }
.format-option.active { border-color: #7ea5b3; background: #f0f7f8; }
.format-option.active .format-radio { border: 4px solid #2c6275; background: #fff; }
.quiet-help { margin: 16px 0 0; color: #83929d; font-size: .78rem; line-height: 1.6; }
.format-card .quiet-help { margin-top: 23px; padding-top: 18px; border-top: 1px solid #eef2f4; }
.workspace-footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 25px; }
.workspace-footer > span { color: #81909a; font-size: .78rem; line-height: 1.5; }
.next-step { display: flex; align-items: center; justify-content: space-between; gap: 25px; padding-right: 18px; white-space: nowrap; }
.next-step:disabled { background: #9cabb3 !important; opacity: .55; }
.selected-content { margin: 25px 0; padding: 21px; border: 1px solid #cce0df; border-radius: 8px; background: #f5faf9; }
.selected-content-label { display: flex; align-items: center; gap: 7px; margin-bottom: 13px; color: #37766f; font-size: .7rem; font-weight: 700; }
.selected-content-label > span:last-child { margin-left: auto; color: #718d89; font-weight: 400; }
.selection-mark { color: #297169; font-size: .9rem; }
.selected-content h3 { margin-bottom: 10px; font-size: 1rem; }
.selected-content p { margin: 0; color: #70828b; font-size: .81rem; line-height: 1.6; }
.content-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 22px; }
.content-actions .text-command { margin-left: auto; }
.activity-summary { display: flex; align-items: center; gap: 13px; margin: 0 0 25px; padding: 15px 18px; border: 1px solid #d8e4e8; border-radius: 8px; background: #fff; }
.summary-dot { width: 8px; height: 8px; flex-shrink: 0; border-radius: 50%; background: #3f887c; }
.activity-summary strong { display: block; color: #304d5e; font-size: .86rem; line-height: 1.4; }
.activity-summary div > span { display: block; margin-top: 5px; color: #85939e; font-size: .74rem; line-height: 1.4; }
.activity-summary .text-command { margin-left: auto; flex-shrink: 0; }
.settings-card { max-width: 850px; }
.timing-settings { display: grid; grid-template-columns: 1fr 260px; align-items: center; gap: 25px; padding: 13px 0 27px; }
.timing-settings .quiet-help { margin-top: 7px; }
.setting-toggle { display: flex; align-items: flex-start; gap: 13px; padding: 22px 0 3px; border-top: 1px solid #e8edf0; cursor: pointer; }
.setting-toggle > input { width: 18px; height: 18px; flex-shrink: 0; margin: 2px 0 0; accent-color: #2b6679; }
.setting-toggle strong { display: block; color: #365463; font-size: .86rem; }
.setting-toggle small { display: block; margin-top: 9px; color: #84939f; font-size: .79rem; line-height: 1.5; }
.settings-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-bottom: 25px; }
.classroom-grid { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); align-items: start; gap: 22px; }
.available-label { display: flex; align-items: center; gap: 6px; color: #66877e; font-size: .68rem; }
.available-label > span { width: 6px; height: 6px; border-radius: 50%; background: #498878; }
.access-card .qr-wrap { grid-template-columns: 200px minmax(0,1fr); gap: 20px; margin-top: 10px; padding: 15px 0; }
.access-card .pin-box { min-width: 0; margin-top: 0; padding: 15px 10px; border: 0; border-radius: 8px; background: #eff5f7; text-align: center; }
.access-card .pin-box span { color: #647e8e; font-size: .62rem; letter-spacing: .08em; }
.access-card .pin-box strong { display: block; margin-top: 8px; color: #204d63; font-size: clamp(1.9rem,2.8vw,2.8rem); letter-spacing: .035em; }
.project-hint { display: block; margin-top: 16px; color: #66899a; font-size: .72rem; line-height: 1.6; text-align: center; }
.classroom-url { overflow-wrap: anywhere; margin-top: 14px; padding-top: 16px; border-top: 1px solid #e7eef2; color: #4e7488; font-size: .79rem; line-height: 1.6; }
.connection-options { margin-top: 18px; color: #7a8f9d; font-size: .75rem; }
.participant-count { padding: 6px 10px; border-radius: 6px; background: #edf3f6; color: #4b7187; font-size: .8rem; }
.participants-card .teams-list { display: block; max-height: 330px; overflow-y: auto; }
.participants-card .team-row { margin-bottom: 8px; }
.room-empty { padding: 35px 15px 43px; text-align: center; }
.room-empty-mark { display: block; margin-bottom: 10px; color: #a6bbc5; font-size: 2.4rem; letter-spacing: .1em; }
.room-empty h3 { color: #778b98; font-size: 1rem; }
.room-empty p { max-width: 270px; margin: 10px auto 0; color: #9aa7b0; font-size: .8rem; line-height: 1.6; }
.room-start { margin-top: 10px; padding-top: 22px; border-top: 1px solid #e7eef2; }
.start-class { width: 100%; min-height: 47px !important; }
.room-start .quiet-help { text-align: center; }
.room-start > .text-command { display: block; margin: 20px auto 0; }
.teacher-page .top-actions { flex-wrap: wrap; justify-content: flex-end; }
.teacher-page button:focus-visible { outline: 3px solid #a8c9d8; outline-offset: 3px; }
@media (min-width: 1530px) { .content-selectors { grid-template-columns: 1fr 1fr; } }
@media (max-width: 1240px) {
  .teacher-workspace { grid-template-columns: 190px minmax(0,1fr); }
  .teacher-page .teacher-shell { padding: 30px 25px; }
  .preparation-grid { grid-template-columns: minmax(0,1fr) 220px; gap: 17px; }
  .workspace-card { padding: 21px; }
  .classroom-grid { grid-template-columns: 1fr; }
  .access-card .qr-wrap { max-width: 500px; }
}
@media (max-width: 900px) {
  .teacher-workspace { display: block; }
  .teacher-navigation { position: static; min-height: 0; padding: 12px 20px; border-right: 0; border-bottom: 1px solid #dce3e8; }
  .teacher-navigation nav { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 6px; }
  .navigation-label,.navigation-note { display: none; }
  .teacher-nav-item { padding: 9px; gap: 8px; }
  .teacher-nav-item small { display: none; }
  .teacher-nav-item strong { font-size: .78rem; }
  .preparation-grid { grid-template-columns: minmax(0,1fr) 235px; }
  .teacher-page .teacher-topbar { position: static; flex-direction: row; align-items: center; }
}
@media (max-width: 680px) {
  .teacher-page .teacher-topbar { flex-wrap: wrap; padding: 15px 18px; gap: 12px; }
  .teacher-page .teacher-shell { padding: 26px 17px; }
  .teacher-navigation { padding: 10px 12px; }
  .teacher-nav-item { justify-content: center; min-height: 48px; }
  .teacher-nav-item > span:first-child { display: none; }
  .teacher-state-pill { font-size: .68rem; padding: 7px 9px; }
  .workspace-heading { gap: 11px; }
  .workspace-heading h2 { font-size: 1.55rem; }
  .workspace-heading p { font-size: .81rem; }
  .preparation-grid,.settings-fields,.timing-settings { grid-template-columns: 1fr; }
  .format-card { order: -1; }
  .format-card > h3 { margin-bottom: 14px; }
  .format-options { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 6px; }
  .format-option { min-height: 70px; padding: 10px 7px; gap: 6px; }
  .format-option small,.format-card > .quiet-help { display: none; }
  .format-option strong { font-size: .72rem; line-height: 1.4; }
  .format-radio { width: 12px; height: 12px; }
  .format-option.active .format-radio { border-width: 3px; }
  .workspace-footer { align-items: stretch; flex-direction: column; }
  .workspace-footer .button { justify-content: center; }
  .card-heading { gap: 10px; flex-wrap: wrap; }
  .selection-empty { min-height: 200px; }
  .library-footer { gap: 14px; }
  .library-footer .button { margin-left: 0; }
  .access-card .qr-wrap { grid-template-columns: 160px minmax(0,1fr); gap: 12px; }
  .access-card #qrcode img,.access-card #qrcode canvas { width: 160px; height: 160px; }
  .access-card .pin-box strong { font-size: 1.8rem; }
  .access-card .pin-box { padding: 12px 4px; }
}

.teacher-page .selection-empty { min-height: 145px; padding: 22px 15px; }
.teacher-page .selection-empty .empty-book { width: 52px; height: 44px; margin-bottom: 12px; }
.teacher-page .content-card .card-heading { margin-bottom: 20px; }
.teacher-page.in-class .teacher-navigation { display: none; }
.teacher-page.in-class .teacher-workspace { grid-template-columns: minmax(0,1fr); }
.teacher-page.in-class .teacher-shell { max-width: 1440px; margin-inline: auto; }

/* Final report: people on the left, the whole questionnaire on the right. */
.final-results-heading { display:flex; align-items:flex-start; justify-content:space-between; gap:24px; margin-bottom:26px; }
.final-results-heading h2 { margin:6px 0 10px; color:var(--navy); font-size:2rem; letter-spacing:-.035em; }
.final-results-heading p { max-width:760px; margin:0; color:#718390; font-size:.9rem; line-height:1.5; }
.final-results-totals { display:flex; gap:18px; padding-top:23px; color:#80929e; font-size:.76rem; white-space:nowrap; }
.final-results-totals strong { color:#365e72; }
.final-results-columns { display:grid; grid-template-columns:minmax(360px,.88fr) minmax(0,1.12fr); gap:24px; align-items:start; }
.final-results-columns .card-heading { margin-bottom:15px; }
.final-panel-description { margin:0 0 18px; color:#7c8f9b; font-size:.77rem; line-height:1.5; }
.final-panel-scroll { max-height:max(240px,calc(100vh - 355px)); overflow-y:auto; scrollbar-gutter:stable; }
.final-ranking-table thead { position:sticky; top:0; z-index:1; background:#fff; }
.final-ranking-table th { padding:12px 6px; font-size:.67rem; white-space:nowrap; }
.final-ranking-table td { padding:16px 6px; vertical-align:middle; font-size:.85rem; }
.final-ranking-table td:nth-child(2) { min-width:110px; overflow-wrap:anywhere; }
.final-ranking-table td:last-child { color:#7b909d; font-size:.78rem; white-space:nowrap; }
.final-rank { display:grid; place-items:center; width:27px; height:27px; border-radius:6px; background:#f0f4f6; color:#6f8794; font-weight:700; font-size:.79rem; }
.final-rank.leader { background:#e1f0eb; color:#29735f; }
.final-alias { display:block; margin-top:6px; color:#8a9ba6; font-size:.7rem; }
.final-out-of { color:#9ca9b1; font-size:.74rem; white-space:nowrap; }
.final-ranking-note { margin:17px 0 0; color:#8a9ba6; font-size:.71rem; line-height:1.55; }
.question-results-legend { display:flex; flex-wrap:wrap; gap:17px; margin:0 0 19px; color:#7c8f9b; font-size:.72rem; }
.question-results-legend > span { display:flex; align-items:center; gap:6px; }
.question-results-legend i { width:9px; height:9px; display:inline-block; border-radius:2px; }
.question-result-row { padding:17px 2px 19px; border-bottom:1px solid #edf1f4; }
.question-result-row:first-child { padding-top:5px; }
.question-result-heading { display:grid; grid-template-columns:24px minmax(0,1fr) auto; gap:10px; align-items:start; }
.question-result-number { padding-top:2px; color:#8c9fab; font-size:.72rem; font-weight:700; }
.question-result-heading p { margin:0; color:#335365; font-size:.84rem; line-height:1.5; }
.question-result-percentage { min-width:51px; padding-left:5px; color:#287c6b; font-size:.91rem; text-align:right; white-space:nowrap; }
.question-result-track { display:flex; height:10px; margin:13px 0 8px 34px; overflow:hidden; border-radius:4px; background:#edf1f4; }
.question-bar-correct { background:#368f7d; }
.question-bar-incorrect { background:#c68174; }
.question-bar-unanswered { background:#d9e1e6; }
.question-result-counts { display:flex; align-items:center; flex-wrap:wrap; gap:6px 15px; margin-left:34px; color:#92a1ab; font-size:.66rem; line-height:1.5; }
.question-result-counts > span { margin-left:auto; }
.question-result-row.not-assessed .question-result-percentage { color:#98a7b0; font-size:.69rem; padding-top:3px; }
.question-result-row.not-assessed .question-result-heading p { color:#8d9ea8; }
.final-results-actions { display:flex; gap:12px; justify-content:flex-end; margin-top:24px; }
@media(max-width:1050px) { .final-results-columns { grid-template-columns:1fr; } .final-panel-scroll { max-height:480px; } .final-results-heading { flex-direction:column; gap:5px; } .final-results-totals { padding-top:5px; } }
@media(max-width:600px) { .final-results-heading h2 { font-size:1.65rem; } .final-results-columns .workspace-card { padding:17px; } .question-result-heading { grid-template-columns:20px minmax(0,1fr) auto; gap:6px; } .question-result-track,.question-result-counts { margin-left:26px; } .final-results-actions { flex-direction:column; } .final-ranking-table td { font-size:.79rem; } }

.final-questions-panel .question-results-list { max-height:none; overflow:visible; }
.final-ranking-panel { position:sticky; top:100px; }
@media(max-width:1050px) { .final-ranking-panel { position:static; } }

/* Drive is a private content-library control, never a classroom projection. */
.teacher-page .drive-library { margin: 20px 0 0; padding: 18px 20px; border: 1px solid #dce6ec; border-radius: 12px; background: #f7fafc; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.teacher-page .drive-library strong { font-size: 14px; }
.teacher-page .drive-library p { margin: 5px 0; font-size: 13px; color: #587083; }
.teacher-page .drive-library a { font-size: 13px; color: #286a8d; }
.teacher-page .drive-actions { display: flex; flex-direction: column; align-items: center; gap: 8px; flex-shrink: 0; }
@media (max-width: 700px) { .teacher-page .drive-library { align-items: flex-start; flex-direction: column; } }