:root {
  --bg: #f3f6f9;
  --surface: #ffffff;
  --surface-2: #eaf0f6;
  --line: #c6d3df;
  --text: #0f1b2b;
  --muted: #4b5f77;
  --accent: #0d9488;
  --danger: #b42318;
  --warn: #b54708;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 95% 5%, rgba(13, 148, 136, 0.12), transparent 30%),
    radial-gradient(circle at 10% 90%, rgba(15, 27, 43, 0.08), transparent 35%),
    var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans", sans-serif;
  user-select: text;
}

body.lock-select {
  user-select: none;
}

.exam-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.eyebrow {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
}

h1 {
  font-size: 1.35rem;
}

.header-meta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.pill {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.45rem 0.65rem;
  min-width: 130px;
  display: flex;
  flex-direction: column;
  font-size: 0.8rem;
}

.pill span {
  color: var(--muted);
}

.status strong {
  color: var(--accent);
}

.exam-shell {
  display: grid;
  grid-template-columns: 250px 1fr 320px;
  gap: 1rem;
  padding: 1rem 1.5rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
}

.question-grid {
  margin-top: 0.75rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.5rem;
}

.question-grid button {
  border: 1px solid var(--line);
  background: var(--surface-2);
  border-radius: 8px;
  padding: 0.4rem 0;
  cursor: pointer;
}

.question-grid button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.exam-main {
  min-height: 60vh;
  position: relative;
}

.question-meta {
  display: flex;
  gap: 0.5rem;
}

.strike-meter {
  margin-top: 0.7rem;
  height: 8px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  overflow: hidden;
}

.strike-meter-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #0d9488, #b54708, #b42318);
  transition: width 220ms ease;
}

.badge {
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  background: #d1fae5;
  font-size: 0.78rem;
  font-weight: 600;
}

.badge.muted {
  background: var(--surface-2);
}

.question-host {
  margin-top: 1rem;
  min-height: 110px;
  position: relative;
}

.question-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(150deg, #fff, #f7fbff);
  padding: 1rem;
  font-size: 1.06rem;
  line-height: 1.55;
}

.z-overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  background: transparent;
}

.answer-area {
  margin-top: 1rem;
  display: grid;
  gap: 0.55rem;
}

.answer-area label {
  display: block;
  padding: 0.7rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
}

.answer-area input[type="text"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.65rem 0.7rem;
  font: inherit;
}

.actions {
  display: flex;
  gap: 0.55rem;
  margin-top: 1rem;
}

button {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 0.52rem 0.8rem;
  font: inherit;
}

button:hover {
  border-color: #9eb3c7;
}

button.accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

button.ghost {
  width: 100%;
  margin-top: 0.5rem;
  border-style: dashed;
}

.monitor-sub {
  margin: 0.4rem 0 0.7rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.summary {
  padding: 0.7rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-2);
  font-size: 0.85rem;
}

.log {
  margin-top: 0.7rem;
  max-height: 260px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.65rem;
  font-size: 0.85rem;
  background: #fff;
}

.monitor {
  display: flex;
  flex-direction: column;
}

.log-entry {
  border-left: 3px solid var(--warn);
  padding-left: 0.45rem;
  margin-bottom: 0.5rem;
}

.methods-panel {
  margin: 0 1.5rem 1.25rem;
}

.toggles {
  margin-top: 0.8rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  gap: 0.65rem;
}

.toggle {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.58rem;
  background: #fff;
}

.toggle strong {
  display: block;
  font-size: 0.92rem;
}

.toggle small {
  color: var(--muted);
}

.watermark {
  position: fixed;
  top: 30%;
  left: 40%;
  transform: rotate(-18deg);
  color: rgba(180, 35, 24, 0.18);
  font-size: clamp(18px, 2vw, 30px);
  pointer-events: none;
  z-index: 80;
  font-weight: 700;
  letter-spacing: 0.08em;
}

#brightnessPulse {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: #fff;
  opacity: 0;
  z-index: 70;
}

.blurry {
  filter: blur(8px);
}

.locked {
  pointer-events: none;
  opacity: 0.28;
}

.lock-screen {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  background: rgba(9, 15, 22, 0.9);
  color: #fff;
  z-index: 100;
}

.svg-box {
  width: 100%;
  min-height: 110px;
}

.canvas-box {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.pseudo-question::before {
  content: attr(data-pseudo);
}

@media (max-width: 1120px) {
  .exam-shell {
    grid-template-columns: 1fr;
  }

  .question-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .actions {
    flex-wrap: wrap;
  }

  .actions button {
    flex: 1 1 160px;
  }
}

@media (max-width: 700px) {
  .exam-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-meta {
    width: 100%;
  }

  .pill {
    min-width: 0;
    flex: 1;
  }

  .question-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .methods-panel {
    margin: 0 1rem 1rem;
  }

  .exam-shell {
    padding: 1rem;
  }
}

@media print {
  body.print-blackout {
    display: none !important;
  }
}