/* -------------------------------------------------------------------------
   Theme tokens and sensible global defaults
   ------------------------------------------------------------------------- */

:root {
  --bg: #08131e;
  --panel: #102334;
  --panel2: #142d42;
  --line: #31516a;
  --text: #eff8ff;
  --muted: #aac1d2;
  --cyan: #51d7ff;
  --blue: #3e91ff;
  --orange: #ffba59;
  --violet: #b69aff;
  --good: #6de3ad;
  --bad: #ff8293;
  --focus: #fff36b;

  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  color: var(--text);
  background: linear-gradient(135deg, #07111b, #0b1c2a 52%, #101c33);
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  margin: 0;
  line-height: 1.45;
}

.site-header,
main {
  max-width: 1500px;
  margin: auto;
  padding-right: 24px;
  padding-left: 24px;
}

/* -------------------------------------------------------------------------
   Header, cards, and shared typography
   ------------------------------------------------------------------------- */

.site-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  padding-top: 24px;
  padding-bottom: 18px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-link {
  padding: 7px 10px;
  border: 1px solid #46718f;
  border-radius: 8px;
  color: var(--text);
  font-size: 0.9rem;
  text-decoration: none;
  background: #183247;
}

.header-link:hover {
  background: #285978;
}

/* A small account icon keeps the optional login out of the game workspace. */
.login-icon {
  display: grid;
  width: 39px;
  height: 39px;
  padding: 7px;
  place-items: center;
}

.login-icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.login-icon.logged-in {
  border-color: var(--cyan);
  color: var(--cyan);
}

.eyebrow {
  margin: 0;
  color: var(--cyan);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0.1rem 0;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
}

h2 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.header-note,
.muted {
  color: var(--muted);
}

.header-note {
  margin: 0 0 0.25rem;
}

/* Compact attribution and outbound links below the lab interface. */
.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  max-width: 1500px;
  margin: 4px auto 0;
  padding: 16px 24px 24px;
  color: var(--muted);
  font-size: 0.84rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.site-footer a {
  color: var(--cyan);
}

.site-footer a:hover {
  color: #dffaff;
}

/* Reusable frosted panel used throughout the lab interface. */
.card {
  border: 1px solid rgba(113, 172, 206, 0.32);
  border-radius: 14px;
  background: rgba(16, 35, 52, 0.94);
  box-shadow: 0 12px 28px #0004;
}

.intro {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
  padding: 18px 20px;
}

.intro p {
  max-width: 780px;
  margin: 0;
}

.legend {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  white-space: nowrap;
}

.symbol {
  margin-right: 4px;
  font-size: 1.25rem;
}

.exc { color: var(--orange); }
.inh { color: var(--violet); }
.none { color: var(--muted); }

/* -------------------------------------------------------------------------
   Optional local account and Olympic leaderboard
   ------------------------------------------------------------------------- */

.leaderboard-card {
  padding: 17px;
}

.account-dialog {
  position: relative;
  width: min(560px, 100%);
}

.account-dialog .eyebrow {
  margin-bottom: 4px;
}

.account-dialog > p {
  margin: 0 0 12px;
}

.login-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 105px auto;
  align-items: end;
  gap: 9px;
}

.login-form[hidden] {
  display: none;
}

.login-form button {
  min-height: 38px;
}

.account-status {
  color: var(--cyan);
}

.dialog-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  font-size: 1.35rem;
  line-height: 1;
  background: transparent;
}

.leaderboard-page {
  min-height: 58vh;
}

.leaderboard-scroll {
  overflow: auto;
  border: 1px solid #2c4d62;
  border-radius: 8px;
}

.leaderboard-table {
  min-width: 570px;
}

.leaderboard-table th,
.leaderboard-table td {
  height: auto;
  padding: 7px 9px;
  text-align: left;
}

.leaderboard-table th {
  position: static;
}

.leaderboard-table td:first-child {
  width: 58px;
  text-align: center;
}

/* Tiers include text in the table; colour is only a secondary cue. */
.leaderboard-table .tier-gold td:nth-child(3) { color: #ffe28a; }
.leaderboard-table .tier-silver td:nth-child(3) { color: #d7edf7; }
.leaderboard-table .tier-bronze td:nth-child(3) { color: #f6b576; }

/* -------------------------------------------------------------------------
   Main experiment layout and Canvas surfaces
   ------------------------------------------------------------------------- */

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 18px;
}

.lab-column,
.controls-column {
  display: grid;
  align-content: start;
  gap: 18px;
}

.canvas-card {
  padding: 12px;
}

.canvas-toolbar,
.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 4px 9px;
  font-size: 0.9rem;
}

.canvas-toolbar label {
  color: var(--muted);
}

/* This wrapper preserves the 3:2 microscopy field at all viewport sizes. */
#canvas-wrap {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid #2c526a;
  border-radius: 10px;
  background: #030a10;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* Avoid browser gestures and selection while operating the stimulation field. */
#field-canvas {
  cursor: crosshair;
  touch-action: none;
  -webkit-user-select: none; /* Safari 3+, iOS 3+ */
  user-select: none;
}

.canvas-help {
  margin: 9px 3px 1px;
  color: var(--muted);
  font-size: 0.82rem;
}

.plot-card {
  height: 210px;
  padding: 14px;
}

.plot-card #activity-canvas {
  height: 150px;
  border-radius: 8px;
  background: #081720;
}

/* -------------------------------------------------------------------------
   Session and pair-classification controls
   ------------------------------------------------------------------------- */

.controls-column > .card {
  padding: 17px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 100px;
  gap: 10px;
}

label {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 0.84rem;
}

input {
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--text);
  font: inherit;
  background: #091823;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

button {
  padding: 8px 10px;
  border: 1px solid #46718f;
  border-radius: 8px;
  color: var(--text);
  font: inherit;
  cursor: pointer;
  background: #1c405b;
  transition: transform 0.15s, background 0.15s;
}

button:hover:not(:disabled) {
  background: #285978;
  transform: translateY(-1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.primary {
  border-color: #56d0ff;
  background: #1675a6;
  font-weight: 700;
}

.secondary {
  background: #183247;
}

.answer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.answer-grid button {
  min-height: 52px;
  text-align: left;
}

.answer-grid span {
  margin-right: 4px;
  font-size: 1.2rem;
  font-weight: bold;
}

.answer-grid button[data-answer="excitatory"] span {
  color: var(--orange);
}

.answer-grid button[data-answer="inhibitory"] span {
  color: var(--violet);
}

kbd {
  margin-left: 3px;
  padding: 1px 3px;
  border: 1px solid #57778c;
  border-radius: 3px;
  color: #dff7ff;
  font: 600 0.72rem ui-monospace, SFMono-Regular, Consolas, monospace;
}

.pair-display {
  min-height: 48px;
  margin: 0.3rem 0 12px;
  padding: 9px;
  border-left: 3px solid var(--cyan);
  background: #0a1a27;
}

.progress-card p {
  color: var(--muted);
}

/* -------------------------------------------------------------------------
   Directed-answer matrix
   ------------------------------------------------------------------------- */

.matrix-card {
  margin: 18px 0;
  padding: 16px;
}

.matrix-key {
  color: var(--muted);
  font-size: 0.8rem;
}

.matrix-actions {
  display: flex;
  align-items: center;
  justify-content: end;
  flex-wrap: wrap;
  gap: 9px;
}

.matrix-scroll {
  max-height: 480px;
  overflow: auto;
  border: 1px solid #2c4d62;
  border-radius: 8px;
}

table {
  width: max-content;
  min-width: 100%;
  border-collapse: collapse;
}

th,
td {
  min-width: 37px;
  height: 34px;
  padding: 0;
  border: 1px solid #29485d;
  text-align: center;
}

/* Sticky headers make both directions easy to track in a large matrix. */
th {
  position: sticky;
  top: 0;
  z-index: 1;
  color: #d9effb;
  font-size: 0.77rem;
  background: #173248;
}

th:first-child {
  left: 0;
  z-index: 2;
}

tbody th {
  left: 0;
  z-index: 1;
}

.matrix-cell {
  width: 100%;
  height: 100%;
  padding: 0;
  border: 0;
  border-radius: 0;
  font-weight: 800;
  background: #0c202e;
}

.matrix-cell[data-value="excitatory"] { color: var(--orange); }
.matrix-cell[data-value="inhibitory"] { color: var(--violet); }
.matrix-cell[data-value="unconnected"] { color: #b8d0dd; }

.matrix-cell.selected {
  outline: 3px solid var(--cyan);
  outline-offset: -3px;
}

.matrix-cell:disabled {
  background: #172b38;
}

/* -------------------------------------------------------------------------
   Lock-in results and review tables
   ------------------------------------------------------------------------- */

.results {
  margin: 18px 0;
  padding: 20px;
}

.results h2 {
  font-size: 1.35rem;
}

.score-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(125px, 1fr));
  gap: 9px;
  margin: 15px 0;
}

.metric {
  padding: 10px;
  border: 1px solid #31536a;
  border-radius: 8px;
  background: #0b1c29;
}

.metric b {
  display: block;
  color: var(--cyan);
  font-size: 1.25rem;
}

.review-table {
  width: 100%;
  min-width: 650px;
}

.review-table td,
.review-table th {
  height: auto;
  padding: 7px;
  text-align: left;
}

.review-table th {
  position: static;
}

.review-scroll {
  overflow: auto;
}

.tag {
  padding: 3px 7px;
  border-radius: 999px;
  font-size: 0.78rem;
  white-space: nowrap;
}

.tag.correct {
  color: #b0ffcf;
  background: #174b3a;
}

.tag.wrong {
  color: #ffd1d9;
  background: #5b2635;
}

/* -------------------------------------------------------------------------
   Modal, screen-reader support, and visible keyboard focus
   ------------------------------------------------------------------------- */

.dialog-backdrop {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 18px;
  background: #0009;
}

/* The explicit selector wins over the layout rule above when UI sets hidden. */
.dialog-backdrop[hidden] {
  display: none;
}

.dialog {
  max-width: 480px;
  padding: 24px;
  border: 1px solid #5c94b2;
  border-radius: 14px;
  background: #153047;
  box-shadow: 0 20px 70px #000;
}

.warning {
  color: #ffe28a;
}

/* Visually hidden content remains available to screen readers. */
.skip-link,
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  top: 5px;
  left: 5px;
  z-index: 30;
  width: auto;
  height: auto;
  padding: 8px;
  clip: auto;
  color: #000;
  background: #fff;
}

button:focus-visible,
input:focus-visible,
#field-canvas:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

/* -------------------------------------------------------------------------
   Responsive adjustments and reduced-motion preference
   ------------------------------------------------------------------------- */

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .controls-column {
    grid-template-columns: repeat(3, 1fr);
  }

  .site-header {
    flex-direction: column;
    align-items: start;
  }

  .intro {
    flex-direction: column;
  }
}

@media (max-width: 700px) {
  .site-header,
  main,
  .site-footer {
    padding-right: 12px;
    padding-left: 12px;
  }

  .site-footer {
    flex-direction: column;
  }

  .header-actions {
    align-self: stretch;
  }

  .controls-column,
  .form-grid,
  .login-form {
    grid-template-columns: 1fr;
  }

  .intro {
    padding: 15px;
  }

  .section-title {
    flex-direction: column;
    align-items: start;
  }

  .matrix-key {
    white-space: normal;
  }

  .matrix-actions {
    justify-content: start;
  }
}

/* Respect motion sensitivity while retaining the interface's functionality. */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}