@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&display=swap");

/* ── Variables ──────────────────────────────────────────────────── */
:root {
  --bg: #ffffff;
  --ink: #181818;
  --muted: #6b6659;
  --accent: #2b3ac4;
  --border: #eaeaea;
}

/* ── Base ───────────────────────────────────────────────────────── */
body {
  background-color: var(--bg);
  font-family: "Libre Baskerville", Georgia, serif;
  color: var(--ink);
}

/* ── jsPsych overrides ──────────────────────────────────────────── */
.jspsych-display-element {
  background-color: var(--bg) !important;
}

.jspsych-content-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.jspsych-content {
  max-width: 680px;
  width: 100%;
  padding: 3rem 2rem;
}

.jspsych-btn {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--bg);
  border: none;
  padding: 0.75rem 2rem;
  cursor: pointer;
  border-radius: 0;
  margin-top: 1.5rem;
  transition: background 0.15s ease;
}

.jspsych-btn:hover {
  background: var(--accent);
}

/* ── Survey inputs ──────────────────────────────────────────────── */
.jspsych-survey-text input[type="text"],
.jspsych-survey-text textarea {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.9rem;
  background: white;
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 0.6rem 0.8rem;
  color: var(--ink);
  outline: none;
}

.jspsych-survey-text input:focus,
.jspsych-survey-text textarea:focus {
  border-color: var(--accent);
}

/* ── Reusable screen components ─────────────────────────────────── */

/* Info/welcome/instruction screens */
.jspsych-screen {
  text-align: left;
}

.jspsych-screen .label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.jspsych-screen h1 {
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 1.5rem 0;
  letter-spacing: -0.02em;
}

.jspsych-screen .divider {
  width: 48px;
  height: 2px;
  background: var(--accent);
  margin: 1.5rem 0;
}

.jspsych-screen p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
  margin: 0 0 1rem 0;
}

.jspsych-screen .key-hint {
  margin-top: 2.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  color: var(--ink);
}

.jspsych-screen .key {
  display: inline-block;
  background: var(--ink);
  color: var(--bg);
  padding: 0.25rem 0.65rem;
  border-radius: 3px;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

/* Centered end/debrief screen */
.jspsych-screen.centered {
  text-align: center;
}

.jspsych-screen.centered .checkmark {
  font-family: "IBM Plex Mono", monospace;
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.jspsych-screen.centered h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin: 0 0 1rem 0;
}

/* ── Trial elements ─────────────────────────────────────────────── */
#fixation {
  font-size: 3rem;
  font-weight: 400;
  color: var(--ink);
}

#stimulus {
  font-size: 1.15rem;
  line-height: 1.8;
  max-width: 560px;
  color: var(--ink);
  border-left: 3px solid var(--accent);
  padding-left: 1.5rem;
  text-align: left;
}

/* ── Math problem grid ────────────────────────────────────────────── */
.math-block-screen {
  text-align: left;
  max-width: 780px;
  width: 100%;
}

.math-block-screen .label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.math-block-screen .block-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
}

.math-block-screen .divider {
  width: 48px;
  height: 2px;
  background: var(--accent);
  margin: 0.75rem 0;
}

.math-problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem 2rem;
  margin: 0.75rem 0 1rem 0;
}

.math-problem-cell {
  font-family: "IBM Plex Mono", monospace;
  font-size: 1rem;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  background: #fafafa;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.math-problem-cell .prob-label {
  font-size: 0.7rem;
  color: var(--muted);
  min-width: 1.2rem;
}

.math-problem-cell .prob-text {
  color: var(--ink);
}

.typing-status-bar {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 0.6rem;
  margin-top: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.typing-status-bar .seq-count {
  font-size: 1rem;
  color: var(--accent);
  font-weight: 500;
}

#inactivity-message-math {
  visibility: hidden;
  color: #c0392b;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  font-weight: 500;
}

.timer-bar-wrap {
  height: 3px;
  background: var(--border);
  margin-bottom: 0.75rem;
  border-radius: 2px;
  overflow: hidden;
}

.timer-bar-fill {
  height: 100%;
  background: var(--accent);
  width: 100%;
  transition: width 1s linear;
}