:root {
  --paper: #EEF1EF;
  --paper-raised: #FAFBFA;
  --ink: #161A19;
  --ink-soft: #51605C;
  --line: #D7DCD9;
  --primary: #1F4B43;
  --primary-soft: #E4ECE9;
  --gold: #C08A2E;
  --rust: #8A4B38;
  --radius: 4px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 760px; margin: 0 auto; padding: 40px 24px 96px; }

h1, h2 { font-family: 'Newsreader', serif; font-weight: 500; margin: 0; letter-spacing: -0.01em; }
h1 { font-size: 26px; margin-bottom: 16px; }
.page-title { font-size: 20px; margin-bottom: 20px; }

.muted { color: var(--ink-soft); font-size: 14px; }
.card-label { text-transform: uppercase; letter-spacing: 0.1em; font-size: 11px; font-weight: 600; color: var(--ink-soft); margin: 0 0 6px; }

.screen { display: none; }
.screen.active { display: block; }

.card { background: var(--paper-raised); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; margin-bottom: 20px; }
.info-body { font-size: 15px; line-height: 1.7; margin: 0 0 16px; }
.quote { font-family: 'Newsreader', serif; font-style: italic; font-size: 16px; color: var(--ink-soft); margin-top: 24px; border-left: 2px solid var(--gold); padding-left: 16px; }

input[type="text"], input[type="email"] {
  width: 100%; font-family: inherit; font-size: 16px; padding: 12px 14px;
  border: 1px solid var(--line); border-radius: var(--radius); background: #fff; color: var(--ink); margin: 14px 0;
}
input:focus { outline: 2px solid var(--primary); outline-offset: 1px; border-color: var(--primary); }

.required-label { font-size: 15px; margin: 0 0 4px; }

.btn-primary, .btn-secondary {
  font-family: inherit; font-size: 15px; font-weight: 600; padding: 12px 22px; border-radius: var(--radius); cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; border: none; }
.btn-primary:hover { background: #163831; }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-secondary { background: transparent; color: var(--primary); border: 1px solid var(--line); }
.btn-secondary:hover { border-color: var(--primary); }

.error { color: var(--rust); font-size: 14px; min-height: 20px; margin: 12px 0 0; }

/* --- Progress bar --- */
.progress-track { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; margin-bottom: 6px; }
.progress-fill { height: 100%; background: var(--primary); transition: width 0.25s ease; }
.progress-label { font-size: 12px; color: var(--ink-soft); margin: 0 0 24px; }

.nav-row { display: flex; justify-content: space-between; margin-top: 24px; }

.sub-heading { font-size: 15px; font-weight: 600; margin: 28px 0 12px; }

/* --- Matrix table (likert5 / lowmodhigh5 / matrix4) --- */
.matrix-table { width: 100%; border-collapse: collapse; margin-bottom: 8px; font-size: 13px; }
.matrix-table th { font-weight: 400; color: var(--ink-soft); text-align: center; padding: 0 4px 12px; vertical-align: bottom; }
.matrix-table td { text-align: center; padding: 10px 4px; border-top: 1px solid var(--line); }
.matrix-question { text-align: left !important; font-size: 14px; color: var(--ink); padding-right: 12px !important; width: 32%; }
.matrix-radio input { width: 18px; height: 18px; accent-color: var(--primary); cursor: pointer; }

/* --- Bipolar / semantic differential table --- */
.bipolar-table { width: 100%; border-collapse: collapse; margin-bottom: 8px; font-size: 12px; }
.bipolar-table th { font-weight: 400; color: var(--ink-soft); text-align: center; padding: 0 2px 10px; }
.bipolar-mid { font-size: 11px; }
.bipolar-table td { text-align: center; padding: 10px 2px; border-top: 1px solid var(--line); }
.bipolar-label { font-size: 13px; white-space: nowrap; }
.bipolar-left { text-align: right !important; padding-right: 10px !important; }
.bipolar-right { text-align: left !important; padding-left: 10px !important; }

/* --- Sliders --- */
.slider-question { margin-bottom: 24px; }
.slider-question-text { font-size: 14px; margin: 0 0 8px; }
.slider-row { display: flex; align-items: center; gap: 12px; }
.slider-end { font-size: 12px; color: var(--ink-soft); width: 16px; flex-shrink: 0; }
.slider-row input[type="range"] {
  flex: 1; -webkit-appearance: none; appearance: none; height: 4px; background: var(--line); border-radius: 2px; outline: none;
}
.slider-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 18px; height: 18px; border-radius: 50%; background: var(--primary); cursor: pointer;
  border: 3px solid #fff; box-shadow: 0 0 0 1px var(--primary);
}
.slider-row input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%; background: var(--primary); cursor: pointer; border: 3px solid #fff; box-shadow: 0 0 0 1px var(--primary);
}

/* --- Single/multi select (demographics) --- */
.select-question { margin-bottom: 28px; }
.select-question-text { font-size: 15px; font-weight: 500; margin: 0 0 10px; }
.select-option { display: flex; align-items: center; gap: 10px; padding: 6px 0; font-size: 14px; cursor: pointer; }
.select-option input { width: 16px; height: 16px; accent-color: var(--primary); cursor: pointer; }

@media (max-width: 600px) {
  .matrix-question { width: auto; }
  .matrix-table, .bipolar-table { font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }