@import url("/static/md3.css?v=20260728");

/* Eye-Rec student — Material Design 3 restyle.
   Calm surface background, filled primary actions, outlined option
   cards. Gaze-critical geometry preserved: >=32px vertical gaps
   between option AOIs, big line-heights, 22px question text.
   No external resources. */

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* legacy aliases kept so every existing rule (and the inline
     lang-switch style in student.html) keeps resolving */
  --bg: var(--md-surface-container);
  --card: var(--md-surface);
  --ink: var(--md-on-surface);
  --muted: var(--md-on-surface-variant);
  --line: var(--md-outline-variant);
  --accent: var(--md-primary);
  --accent-dark: #0842A0;              /* pressed/darker primary */
  --accent-soft: var(--md-primary-container);
  --good: var(--md-success);
  --bad: var(--md-error);
}

html, body { height: 100%; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 18px;
  line-height: 1.55;
}

.hidden { display: none !important; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ------------------------------------------------- generic screens */

.screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  gap: 28px;
}

.brand { font-size: 44px; font-weight: 600; letter-spacing: -0.02em; }
.subtitle { font-size: 20px; color: var(--muted); }
.muted { color: var(--muted); }

/* MD3 buttons: .btn = outlined pill, .btn.primary = filled pill */
.btn {
  font: inherit;
  font-size: 19px;
  font-weight: 600;
  padding: 14px 34px;
  border-radius: var(--md-radius-full);
  border: 1px solid var(--md-outline);
  background: transparent;
  color: var(--md-primary);
  cursor: pointer;
  transition: background-color 0.15s ease, box-shadow 0.15s ease,
              border-color 0.15s ease;
}
.btn:hover:not(:disabled) { background: var(--md-secondary-container); }
.btn.primary {
  background: var(--md-primary);
  border-color: var(--md-primary);
  color: var(--md-on-primary);
}
.btn.primary:hover:not(:disabled) {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  box-shadow: var(--md-elev-1);
}
.btn:disabled { opacity: 0.45; cursor: default; }
.btn:focus-visible,
.option:focus-visible {
  outline: 3px solid var(--md-primary);
  outline-offset: 2px;
}
.btn-row { display: flex; gap: 18px; }

.error {
  color: var(--bad);
  font-weight: 600;
  max-width: 640px;
  text-align: center;
}

/* --------------------------------------------------------- 1 join */

#join-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}

#code-input {
  font: inherit;
  font-size: 32px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: center;
  padding: 18px 24px;
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-m);
  width: min(440px, 90vw);
  background: var(--card);
  color: var(--ink);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
#code-input:focus {
  outline: none;
  border-color: var(--md-primary);
  box-shadow: 0 0 0 4px var(--md-primary-container);
}
#code-input::placeholder { color: var(--md-outline); }

/* ------------------------------------------------------ 2 consent */

.anon-banner { font-size: 24px; }

.anon-pill {
  display: inline-block;
  background: var(--md-primary);
  color: var(--md-on-primary);
  border-radius: var(--md-radius-full);
  padding: 4px 18px;
  font-size: 26px;
  letter-spacing: 0.04em;
}

/* consent notice: md-card with primary left accent */
.notice {
  background: var(--card);
  border: 1px solid var(--md-outline-variant);
  border-left: 6px solid var(--md-primary);
  border-radius: var(--md-radius-m);
  box-shadow: var(--md-elev-1);
  padding: 30px 34px;
  max-width: 780px;
}
.notice h2 { margin-bottom: 18px; font-size: 22px; font-weight: 600; }
.notice ul {
  padding-left: 22px;
  display: grid;
  gap: 12px;
}

.mock-note {
  margin-top: 18px;
  padding: 10px 14px;
  background: var(--md-warn-container);
  border: 1px solid rgba(78, 61, 0, 0.25);
  border-radius: var(--md-radius-s);
  color: #4E3D00;
  font-size: 17px;
}

/* -------------------------------------------------- 3 calibration */

#screen-calibration {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: var(--bg);
}

#cal-instructions {
  position: absolute;
  top: 10px;
  left: 0;
  width: 100%;
  text-align: center;
  color: var(--muted);
  font-size: 17px;
}
#cal-progress { font-weight: 700; color: var(--ink); }

#cal-dot {
  position: absolute;
  width: 28px;
  height: 28px;
  border-radius: var(--md-radius-full);
  border: none;
  color: var(--md-on-primary);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transform: translate(-50%, -50%);
  background: var(--md-primary);
  box-shadow: 0 0 0 5px rgba(11, 87, 208, 0.18);   /* primary halo */
}
#cal-dot.done {
  background: var(--md-success);
  box-shadow: 0 0 0 5px rgba(20, 108, 46, 0.25);   /* success halo */
}

#val-box {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
#val-box p {
  position: absolute;
  top: 10px;
  width: 100%;
  text-align: center;
  color: var(--muted);
  font-size: 17px;
}
#val-target {
  width: 28px;
  height: 28px;
  border-radius: var(--md-radius-full);
  background: var(--md-primary);
  box-shadow: 0 0 0 7px var(--md-primary-container);
}

#val-result {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 26px;
  background: var(--bg);
  padding: 24px;
}
#val-msg {
  font-size: 21px;
  font-weight: 600;
  max-width: 640px;
  text-align: center;
}

/* keep the WebGazer video preview clear of the calibration dots and
   let clicks pass through it */
#webgazerVideoContainer {
  left: 30% !important;
  top: 12px !important;
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 45;
}

/* --------------------------------------------------- 4 instructions */

.rules {
  background: var(--card);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-radius-m);
  box-shadow: var(--md-elev-1);
  padding: 26px 30px 26px 48px;
  max-width: 680px;
  display: grid;
  gap: 12px;
  font-size: 19px;
}

/* ----------------------------------------------------------- 5 quiz */

#screen-quiz {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

/* top bar: surface + elev-1 */
#quiz-header {
  height: 48px;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card);
  box-shadow: var(--md-elev-1);
  position: relative;
  z-index: 2;
  font-size: 16px;
  color: var(--muted);
}
#q-num, #q-total { font-weight: 700; color: var(--ink); }

#quiz-body {
  width: min(940px, 100%);
  margin: 0 auto;
  padding: 30px 32px 48px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.question-card {
  background: var(--card);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-radius-l);
  box-shadow: var(--md-elev-1);
  padding: 26px 32px;
  font-size: 22px;          /* gaze-critical: keep 22px */
  line-height: 1.65;
  margin-bottom: 44px;      /* gaze-critical: >=32px AOI gap */
}

/* rich-PDF question snapshot inside the question card */
.q-snapshot { margin-top: 20px; }
.q-snapshot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--md-radius-m);
  border: 1px solid var(--md-outline-variant);
}

#options {
  display: flex;
  flex-direction: column;
  gap: 36px;                /* gaze-critical: >=32px AOI separation */
}

/* option = outlined card; selected = primary-container */
.option {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  width: 100%;
  text-align: left;
  font: inherit;
  font-size: 20px;
  line-height: 1.6;
  background: var(--card);
  color: var(--ink);
  border: 2px solid var(--md-outline-variant);
  border-radius: var(--md-radius-l);
  padding: 20px 26px;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease,
              box-shadow 0.15s ease;
}
.option:hover {
  border-color: var(--md-primary);
  background: var(--md-surface);
  box-shadow: var(--md-elev-1);
}
.option[aria-pressed="true"] {
  border-color: var(--md-primary);
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  box-shadow: inset 0 0 0 1px var(--md-primary);
}
.opt-letter {
  font-weight: 700;
  color: var(--md-primary);
  min-width: 1.3em;
}
.option[aria-pressed="true"] .opt-letter { color: var(--md-on-primary-container); }

/* yes/no: two large side-by-side tonal buttons, >=48px gap */
#options.yn-options,
.yn-options {
  flex-direction: row;
  align-items: stretch;
  gap: 48px;
}
.yn-options .option {
  flex: 1 1 0;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 110px;
  padding: 28px 26px;
  font-size: 22px;
  font-weight: 600;
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
  border: 2px solid transparent;
  border-radius: var(--md-radius-l);
}
.yn-options .option:hover {
  background: var(--md-secondary-container);
  border-color: var(--md-primary);
}
.yn-options .option[aria-pressed="true"] {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-color: var(--md-primary);
  box-shadow: inset 0 0 0 1px var(--md-primary);
}

/* fill / open answer card: md-field-like inputs, generous AOI spacing */
#aoi-answer {
  background: var(--card);
  border: 2px solid var(--md-outline-variant);
  border-radius: var(--md-radius-l);
  padding: 26px 32px;
  margin-bottom: 36px;      /* same generous AOI spacing as options */
  display: grid;
  gap: 18px;
}
#aoi-answer input,
#aoi-answer textarea {
  font: inherit;
  font-size: 20px;          /* gaze-critical: big readable text */
  line-height: 1.6;
  width: 100%;
  color: var(--md-on-surface);
  background: var(--md-surface);
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-s);
  padding: 16px 20px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
#aoi-answer input:focus,
#aoi-answer textarea:focus {
  outline: none;
  border-color: var(--md-primary);
  box-shadow: 0 0 0 3px var(--md-primary-container);
}
#aoi-answer input::placeholder,
#aoi-answer textarea::placeholder {
  color: var(--md-on-surface-variant);
  opacity: 0.7;
}
#aoi-answer textarea {
  min-height: 170px;
  resize: vertical;
}

#quiz-footer {
  display: flex;
  justify-content: flex-end;
  margin-top: 46px;
}

/* ----------------------------------------------------------- 6 done */

.done-card {
  background: var(--card);
  border: 1px solid var(--md-outline-variant);
  border-top: 6px solid var(--md-success);
  border-radius: var(--md-radius-l);
  box-shadow: var(--md-elev-2);
  padding: 44px 56px;
  text-align: center;
  display: grid;
  gap: 16px;
}
.done-card h2 { font-size: 30px; font-weight: 600; }

/* ------------------------------------------- fullscreen overlay */

#fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(26, 28, 30, 0.72);   /* MD3 scrim */
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.fs-card {
  background: var(--card);
  border-radius: var(--md-radius-l);
  box-shadow: var(--md-elev-2);
  padding: 40px 48px;
  text-align: center;
  display: grid;
  gap: 18px;
  max-width: 500px;
}