:root {
  /* Stanford GSB palette */
  --cardinal: #8C1515;
  --cardinal-dark: #761111;
  --cardinal-deep: #620B0B;
  --cardinal-bright: #B83A4B;
  --ink: #2e2d29;
  --gray: #53565A;
  --hair: #d5d0c8;
  --stone: #b6b1a9;
  --canvas: #f6f3ee;      /* warm sandstone canvas */
  --card: #ffffff;
  --focus: rgba(140, 21, 21, 0.16);

  --radius: 12px;
  --shadow: 0 1px 3px rgba(46, 45, 41, 0.12), 0 6px 18px -10px rgba(46, 45, 41, 0.25);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: "Roboto", Arial, Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ── Top bar ── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--card);
  border-bottom: 1px solid var(--hair);
}
.topbar::before {
  content: "";
  display: block;
  height: 6px;
  background: var(--cardinal);
}
.topbar-inner {
  max-width: 820px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; flex-direction: column; line-height: 1.1; }
.brand-mark {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 22px;
  font-weight: 600;
  color: var(--cardinal);
  letter-spacing: -0.01em;
}
.brand-ai { color: var(--ink); }
.brand-sub {
  margin-top: 2px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray);
}
.topbar-actions { display: flex; gap: 10px; }

/* ── Buttons ── */
.primary-btn {
  background: var(--cardinal);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
}
.primary-btn:hover { background: var(--cardinal-dark); }
.primary-btn:active { transform: translateY(1px); }

.ghost-btn {
  background: transparent;
  color: var(--cardinal);
  border: 1px solid var(--hair);
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.ghost-btn:hover { border-color: var(--cardinal); }

.link-btn {
  background: none;
  border: none;
  color: var(--gray);
  font-size: 13px;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.link-btn:hover { color: var(--cardinal); }

.icon-btn {
  background: none;
  border: none;
  color: var(--stone);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  padding: 6px;
  border-radius: 6px;
  transition: color 0.15s ease, background 0.15s ease;
}
.icon-btn:hover { color: var(--cardinal); background: var(--focus); }

/* ── Canvas / cards ── */
.canvas {
  max-width: 820px;
  margin: 0 auto;
  padding: 28px 20px 80px;
}
.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px 26px;
  margin-bottom: 16px;
  overflow: hidden;
}

/* Header card with cardinal top band */
.header-card { padding-top: 30px; }
.header-accent {
  position: absolute;
  inset: 0 0 auto 0;
  height: 10px;
  background: linear-gradient(90deg, var(--cardinal-deep), var(--cardinal) 60%, var(--cardinal-bright));
}
.form-title {
  width: 100%;
  border: none;
  border-bottom: 1px solid transparent;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 30px;
  font-weight: 600;
  color: var(--ink);
  padding: 6px 0;
  background: transparent;
  outline: none;
}
.form-desc {
  width: 100%;
  border: none;
  border-bottom: 1px solid transparent;
  font-size: 14px;
  color: var(--gray);
  padding: 6px 0;
  margin-top: 4px;
  background: transparent;
  outline: none;
}
.form-title:focus, .form-desc:focus,
.q-title:focus { border-bottom-color: var(--cardinal); }

/* ── Question cards ── */
.q-card { border-left: 6px solid transparent; }
.q-card.is-active {
  border-left-color: var(--cardinal);
  box-shadow: 0 1px 3px rgba(140,21,21,.14), 0 10px 26px -12px rgba(140,21,21,.4);
}
.q-head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  justify-content: space-between;
}
.q-title {
  flex: 1;
  border: none;
  border-bottom: 1px solid var(--hair);
  background: #faf8f5;
  border-radius: 6px 6px 0 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  padding: 10px 12px;
  outline: none;
}
.q-typebadge {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cardinal);
  background: var(--focus);
  border-radius: 999px;
  padding: 4px 10px;
  white-space: nowrap;
  align-self: center;
}

.q-body { margin-top: 18px; }

/* Inputs that mimic Forms */
.fld {
  width: 100%;
  border: none;
  border-bottom: 1px solid var(--hair);
  background: transparent;
  font-size: 14px;
  color: var(--ink);
  padding: 8px 2px;
  outline: none;
  transition: border-color 0.15s ease;
}
.fld::placeholder { color: var(--stone); }
.fld:focus { border-bottom: 2px solid var(--cardinal); }
textarea.fld { resize: vertical; min-height: 64px; border: 1px solid var(--hair); border-radius: 8px; padding: 10px; }

/* Options (radio/checkbox/dropdown rows) */
.opt-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 10px 0;
}
.opt-row input[type="radio"],
.opt-row input[type="checkbox"] {
  width: 18px; height: 18px;
  accent-color: var(--cardinal);
  cursor: pointer;
}
.opt-text {
  flex: 1;
  border: none;
  border-bottom: 1px solid transparent;
  background: transparent;
  font-size: 14px;
  color: var(--ink);
  padding: 4px 2px;
  outline: none;
}
.opt-text:focus { border-bottom-color: var(--cardinal); }
.opt-remove { color: var(--stone); }

.add-opt {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  font-size: 13px;
  color: var(--cardinal);
  background: none;
  border: none;
  cursor: pointer;
}
.add-opt:hover { text-decoration: underline; text-underline-offset: 3px; }

select.fld {
  border: 1px solid var(--hair);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
}

/* Linear scale */
.scale-row {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 6px;
}
.scale-item { display: flex; flex-direction: column; align-items: center; gap: 6px; font-size: 13px; color: var(--gray); }
.scale-item input { accent-color: var(--cardinal); width: 18px; height: 18px; }

/* Question footer (required toggle + delete) */
.q-foot {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--hair);
}
.req-toggle { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--gray); cursor: pointer; }
.req-toggle input { accent-color: var(--cardinal); width: 16px; height: 16px; }

/* ── Add bar ── */
.add-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card);
  border: 1px dashed var(--stone);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 16px;
}
.add-label { font-size: 13px; color: var(--gray); font-weight: 500; }
.type-select {
  border: 1px solid var(--hair);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 14px;
  color: var(--ink);
  background: #fff;
  outline: none;
}
.type-select:focus { border-color: var(--cardinal); }

/* ── Form footer ── */
.form-foot {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 4px;
}
.submit-btn { padding: 11px 28px; font-size: 15px; }

.footnote {
  text-align: center;
  margin-top: 30px;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--stone);
}

/* ── Preview (respondent) mode ── */
body.preview .topbar-actions #sendBtn { display: none; }
body.preview .q-typebadge,
body.preview .q-foot,
body.preview .add-bar,
body.preview .opt-remove,
body.preview .add-opt,
body.preview #clearBtn { display: none; }
body.preview .form-title,
body.preview .form-desc,
body.preview .q-title,
body.preview .opt-text { pointer-events: none; }
body.preview .q-title { background: transparent; border-bottom: none; padding-left: 0; }
body.preview .q-card.is-active { border-left-color: transparent; box-shadow: var(--shadow); }

/* ── Toast ── */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(20px);
  background: var(--ink);
  color: #fff;
  padding: 12px 22px;
  border-radius: 8px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.req-star { color: var(--cardinal); margin-left: 4px; }

/* Tablet */
@media (max-width: 760px) {
  .topbar-actions { gap: 8px; }
  .topbar-actions .ghost-btn,
  .topbar-actions .primary-btn { padding: 8px 12px; font-size: 13px; }
}

/* Phone */
@media (max-width: 560px) {
  .form-title { font-size: 24px; }
  .topbar-inner { flex-wrap: wrap; gap: 10px; padding: 10px 14px; }
  .brand-mark { font-size: 20px; }
  .topbar-actions { width: 100%; flex-wrap: wrap; }
  .topbar-actions .ghost-btn,
  .topbar-actions .primary-btn { flex: 1 1 auto; text-align: center; white-space: nowrap; }
  .canvas { padding: 18px 12px 60px; }
  .card { padding: 18px; }
  .add-bar { flex-wrap: wrap; }
  .form-foot { flex-wrap: wrap; gap: 12px; }
}

/* Small phone */
@media (max-width: 380px) {
  .brand-sub { display: none; }
  .big-score { font-size: 52px !important; }
}