@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=DM+Sans:wght@400;500;600&family=Playfair+Display:wght@600;700&display=swap');

:root {
  --bg:        #0d0e12;
  --surface:   #161820;
  --surface-2: #1e2030;
  --border:    #2a2d3e;
  --text:      #e8e9f0;
  --muted:     #8b8fa8;
  --gold:      #e8c547;
  --gold-bg:   #e8c547;
  --blue:      #5b8dee;
  --ok:        #22c55e;
  --bad:       #f87171;
  --shadow:    0 2px 20px rgba(0,0,0,0.35);
  --radius:    14px;
}

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

html, body { min-height: 100%; }

body {
  font-family: 'DM Sans', -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  padding-bottom: 2rem;
}

/* ── Brand strip ── */
.brand-strip {
  width: min(980px, 96vw);
  margin: 1.25rem auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.lab-badge {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: #0d0e12;
  background: var(--gold-bg);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.author-note {
  margin: 0;
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  font-style: normal;
}

/* ── App layout ── */
.app {
  width: min(980px, 96vw);
  margin: 0 auto;
  padding: 0.7rem 0 1.5rem;
}

.screen { width: 100%; }
.hidden { display: none !important; }

/* ── Card ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.75rem;
}

h1 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.85rem;
  line-height: 1.25;
}

h2 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.85rem;
  line-height: 1.3;
}

h3 {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gold);
  margin-bottom: 0.6rem;
}

p {
  font-size: 0.925rem;
  line-height: 1.7;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

/* ── Form controls ── */
.control-group {
  display: grid;
  gap: 0.4rem;
  margin: 1rem 0;
}

label {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--muted);
}

input[type="text"] {
  min-height: 46px;
  border-radius: 9px;
  border: 1px solid var(--border);
  padding: 0.6rem 0.9rem;
  background: var(--surface-2);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.18s;
}

input[type="text"]:focus { border-color: var(--gold-bg); }
input[type="text"]::placeholder { color: var(--muted); opacity: 0.6; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border-radius: 9px;
  border: 1px solid var(--border);
  padding: 0.6rem 1.25rem;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
  transition: background 0.18s, transform 0.1s;
}

.btn:active { transform: scale(0.97); }
.btn:hover  { background: var(--border); }

.btn-primary {
  background: var(--gold-bg);
  color: #0d0e12;
  border-color: transparent;
}
.btn-primary:hover { filter: brightness(0.92); background: var(--gold-bg); }

/* ── Mode buttons ── */
.mode-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.mode-btn {
  width: 76px;
  height: 76px;
  border-radius: 12px;
  border: 2px solid var(--border);
  color: #fff;
  font-family: 'DM Sans', sans-serif;
  display: grid;
  place-items: center;
  padding: 0;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease;
}

.mode-btn.is-active {
  transform: scale(1.06);
  border-color: var(--gold-bg);
  box-shadow: 0 0 0 3px rgba(232,197,71,0.35);
}

.mode-gris  { background: #606060; }
.mode-rojo  { background: #8b1a1a; }
.mode-verde { background: #1a6b1a; }
.mode-azul  { background: #1a1a8b; }

.mode-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(0,0,0,0.4);
}

/* ── Actions ── */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1rem;
}

/* ── Alert ── */
.alert { color: var(--bad); font-weight: 600; font-size: 0.875rem; }

/* ── Top bar (experiment screen) ── */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.6rem;
  flex-wrap: wrap;
  padding: 0 0.1rem;
  margin-bottom: 0.65rem;
}

#trial-progress {
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
  margin: 0;
}

#trial-instruction {
  font-size: 0.875rem;
  color: var(--muted);
  margin: 0;
}

/* ── Stimulus area ── */
#stimulus-area {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  height: min(72vh, 560px);
  overflow: hidden;
  cursor: pointer;
  background: #808080;
  touch-action: manipulation;
}

.region { position: absolute; }

#feedback-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

#feedback-overlay {
  position: absolute;
  top: 0.7rem;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(13,14,18,0.82);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text);
  text-align: center;
}

/* ── Results chart ── */
.chart-wrap {
  width: 100%;
  height: min(340px, 50vh);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  padding: 0.5rem;
  margin: 1rem 0;
}

#threshold-text { font-weight: 600; color: var(--text); font-size: 0.9rem; }

.save-status      { font-size: 0.85rem; font-weight: 600; }
.save-status.ok   { color: var(--ok); }
.save-status.err  { color: var(--bad); }
.save-status.info { color: var(--muted); }

/* ── Ranking card ── */
.ranking-card {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--surface-2);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.ranking-head {
  display: flex;
  justify-content: space-between;
  gap: 0.6rem;
  align-items: baseline;
  margin-bottom: 0.75rem;
}

.ranking-head h3 { margin: 0; }

#ranking-status {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
}

.ranking-list { display: grid; gap: 0.45rem; }

.ranking-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.65rem;
}

.ranking-tab {
  min-height: 32px;
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.ranking-tab.is-active {
  border-color: var(--gold-bg);
  color: var(--gold);
}

.rank-row {
  display: grid;
  grid-template-columns: 32px 1fr auto;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 0.45rem 0.65rem;
  background: var(--surface);
}

.rank-row.mine { border-color: rgba(232,197,71,0.3); background: rgba(232,197,71,0.07); }

.rank-pos      { font-weight: 700; text-align: center; color: var(--muted); font-family: 'DM Mono', monospace; font-size: 0.85rem; }
.rank-pos.top1 { color: #e8c547; }
.rank-pos.top2 { color: #a0a8c0; }
.rank-pos.top3 { color: #cd7f32; }

.rank-name  { font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 0.9rem; }
.rank-meta  { font-size: 0.72rem; color: var(--muted); }
.rank-value { font-weight: 700; color: var(--muted); font-family: 'DM Mono', monospace; font-size: 0.9rem; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .brand-strip, .app { width: min(98vw, 980px); }
  .card { padding: 1.25rem; border-radius: 12px; }
  #stimulus-area { height: min(62vh, 480px); border-radius: 12px; }
  .chart-wrap { height: min(300px, 45vh); }
}

@media (max-width: 600px) {
  .top-bar { align-items: flex-start; }
  #trial-instruction { width: 100%; }
  #stimulus-area { height: min(58vh, 420px); }
  #feedback-overlay { width: calc(100% - 1rem); border-radius: 12px; }
  .actions .btn { flex: 1 1 160px; }
  .mode-buttons { justify-content: center; }
}