@font-face {
  font-family: "Atkinson Hyperlegible Next";
  src: url("../web/assets/fonts/atkinson-hyperlegible-next.woff2") format("woff2");
  font-style: normal;
  font-weight: 200 800;
  font-display: swap;
}

.form-error {
    margin: 12px 0;
    padding: 12px 14px;
    border: 1px solid #f2b8b5;
    border-radius: 12px;
    color: #9f1c16;
    background: #fff1f0;
    font-weight: 650;
    line-height: 1.45;
}

.form-error[hidden] {
    display: none !important;
}

:root {
  color-scheme: light only;
  --primary: #10211b;
  --primary-hover: #185cff;
  --accent: #c7f43d;
  --accent2: #185cff;
  --stroke: #d5d9d4;
  --bg: #f4f3ec;
  --card-bg: #ffffff;
  --text-main: #10211b;
  --text-secondary: #55635c;
  --border: #d5d9d4;
  --input-bg: #fbfbf7;
  --header-bg: rgba(244, 243, 236, .94);
}

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

html { background: var(--bg); }
body {
  font-family: "Atkinson Hyperlegible Next", "Segoe UI", sans-serif;
  padding-top: 88px;
  background:
    linear-gradient(90deg, transparent 49.8%, rgba(16, 33, 27, .055) 50%, transparent 50.2%),
    var(--bg);
  background-size: 64px 100%;
  color: var(--text-main);
  font-size: 18px;
  line-height: 1.55;
}

.top-bar {
  height: 72px;
  padding: 0 clamp(18px, 4vw, 52px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--border);
  box-shadow: none;
  backdrop-filter: blur(16px);
}
.header-left {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--text-main);
  font-size: 22px;
  font-weight: 780;
  letter-spacing: -.045em;
  text-transform: lowercase;
}
.header-left::before {
  content: "";
  width: 36px;
  height: 36px;
  display: block;
  background: url("../web/assets/wecog-mark.svg") center / contain no-repeat;
}
.header-right { display: flex; align-items: center; gap: 12px; }
.id-badge {
  margin-right: 0;
  border-color: var(--border);
  border-radius: 999px;
  background: var(--card-bg);
  color: var(--text-secondary);
  font-size: 13px;
}
.lang-switch { display: flex; align-items: center; }
.participant-language-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 680;
}
#participantLanguageSelect {
  min-width: 150px;
  min-height: 44px;
  padding: 0 38px 0 13px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card-bg);
  color: var(--text-main);
  font: 680 15px/1 "Atkinson Hyperlegible Next", sans-serif;
  cursor: pointer;
}
.legacy-language-controls { display: none !important; }
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.container {
  width: calc(100% - 32px);
  max-width: 760px;
  min-height: 420px;
  margin: 24px auto 48px;
  padding: clamp(28px, 5vw, 56px);
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--card-bg);
  box-shadow: 0 24px 70px rgba(16, 33, 27, .09);
}
.step { animation: participantStepIn .32s ease both; }
@keyframes participantStepIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
h1, h2 {
  color: var(--text-main);
  font-weight: 760;
  letter-spacing: -.04em;
  line-height: 1.05;
}
h1 { font-size: clamp(2.35rem, 7vw, 4.6rem); margin-bottom: 18px; }
h2 { font-size: clamp(2rem, 5vw, 3.25rem); margin-bottom: 24px; }
h3 {
  color: var(--text-secondary);
  font-size: 13px;
  letter-spacing: .08em;
  border-bottom-color: var(--border);
}
p, .sub { color: var(--text-secondary); }
.text-center { font-size: 1.12rem; }

.btn {
  min-height: 54px;
  padding: 14px 24px;
  border: 1px solid var(--primary);
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font: 720 18px/1.2 "Atkinson Hyperlegible Next", sans-serif;
  box-shadow: none;
}
.btn:hover { background: var(--primary-hover); border-color: var(--primary-hover); transform: none; }
.btn:disabled { border-color: #d8dcd8; background: #e5e7e3; color: #7d8681; }
.btn-secondary { border-color: var(--border); background: #fff; color: var(--text-main); }
.btn-secondary:hover { border-color: var(--text-main); background: #fff; color: var(--text-main); }

.form-group label { color: var(--text-main); font-size: 15px; }
.form-group select, .form-group input, textarea, #inviteLinkInput {
  min-height: 50px;
  padding: 12px 14px;
  border-color: var(--border) !important;
  border-radius: 12px !important;
  background: var(--input-bg) !important;
  color: var(--text-main);
  font: 600 17px/1.35 "Atkinson Hyperlegible Next", sans-serif;
}
.form-group select:focus, .form-group input:focus, textarea:focus, #inviteLinkInput:focus {
  outline: 3px solid #185cff !important;
  outline-offset: 2px;
}
.consent-box {
  height: min(300px, 38vh);
  padding: 22px;
  border-color: var(--border);
  background: var(--input-bg);
  font-size: 16px;
}
.checkbox-wrapper {
  min-height: 58px;
  border: 1px solid var(--border);
  background: #fff;
}
.checkbox-wrapper input { width: 22px; height: 22px; flex: 0 0 22px; accent-color: var(--primary); }
.warning-container {
  border: 1px solid var(--border) !important;
  border-left: 5px solid var(--accent) !important;
  border-radius: 14px !important;
  background: #fbfcf7 !important;
  color: var(--text-main) !important;
}
.warning-title { color: var(--text-main) !important; }
.privacy-policy-short { font-size: 15px; }

/* Research-critical full-screen surfaces remain neutral and free of brand decoration. */
.fullscreen-calibration,
.tracking-test-area,
.gaze-test-screen,
#visuospatialDrawingOverlay { font-family: "Atkinson Hyperlegible Next", sans-serif; }
.fullscreen-calibration, .gaze-test-screen, #visuospatialDrawingOverlay { background: #fff; }
.tracking-test-area { background: #101411; }
.test-instruction-card, .protocol-instruction-card {
  border-color: var(--border);
  background: rgba(255, 255, 255, .96);
  color: var(--text-main);
  box-shadow: 0 12px 40px rgba(16,33,27,.09);
}
.fullscreen-calibration .calib-instruction {
  border: 0;
  background: transparent;
  color: var(--text-main);
  box-shadow: none;
}
.fullscreen-calibration .calib-progress { color: var(--text-secondary); }

.survey-runtime {
  width: min(680px, 100%);
  max-height: min(58vh, 620px);
  margin: 0 auto 22px;
  padding-right: 8px;
  overflow-y: auto;
}
.survey-runtime-description {
  margin: 0 0 22px;
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.5;
}
.survey-runtime-form { display: flex; flex-direction: column; gap: 18px; }
.survey-runtime-question {
  min-width: 0;
  margin: 0;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--input-bg);
}
.survey-runtime-question legend {
  width: 100%;
  margin: 0 0 14px;
  padding: 0;
  color: var(--text-main);
  font-size: 18px;
  font-weight: 720;
  line-height: 1.4;
}
.survey-required-mark { color: #c62828; }
.survey-runtime-open {
  width: 100%;
  min-height: 112px;
  resize: vertical;
}
.survey-runtime-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 48px;
  margin-top: 8px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  color: var(--text-main);
  cursor: pointer;
}
.survey-runtime-option input {
  width: 21px;
  height: 21px;
  flex: 0 0 21px;
  margin-top: 2px;
  accent-color: var(--primary);
}
.survey-question-error {
  min-height: 0;
  margin-top: 8px;
  color: #a61b1b;
  font-size: 15px;
  font-weight: 680;
}
.survey-question-invalid {
  border-color: #c62828;
  background: #fff8f7;
}
.survey-runtime-privacy {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.45;
}
.survey-runtime-error {
  padding: 18px;
  border: 1px solid #e7b5b0;
  border-radius: 14px;
  background: #fff8f7;
  color: #7f1d1d;
}

*:focus-visible { outline: 3px solid #185cff !important; outline-offset: 3px !important; }

@media (max-width: 640px) {
  body { padding-top: 74px; background-size: 44px 100%; font-size: 17px; }
  .top-bar { height: 64px; padding: 0 14px; }
  .header-left { font-size: 20px; }
  .header-left::before { width: 32px; height: 32px; }
  #participantLanguageSelect { min-width: 112px; max-width: 42vw; }
  .container { width: calc(100% - 20px); margin-top: 12px; padding: 28px 20px; border-radius: 20px; }
  .form-row { flex-direction: column; gap: 0; }
  .btn { font-size: 17px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}