:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-alt: #f0f2f5;
  --border: #dfe3e8;
  --text: #1b1f24;
  --muted: #616b76;
  --accent: #2f6bd8;
  --accent-text: #ffffff;
  --danger: #c0392b;
  --success: #1f8a54;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c;
    --surface: #1c2027;
    --surface-alt: #232830;
    --border: #313843;
    --text: #e8eaed;
    --muted: #9aa4b1;
    --accent: #6ea0ff;
    --accent-text: #10131a;
    --danger: #f0776a;
    --success: #56c98b;
    --shadow: none;
  }
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

h1 { font-size: 1.5rem; margin: 0 0 .25rem; }
h2 { font-size: 1.1rem; margin: 0 0 .75rem; }
h3 { font-size: .95rem; margin: 1rem 0 .5rem; }
p { margin: 0 0 .75rem; }
a { color: var(--accent); }

.shell { max-width: 1100px; margin: 0 auto; padding: 1.25rem 1rem 3rem; }
.shell--narrow { max-width: 620px; padding-top: 2.5rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.block { display: block; }
.num { text-align: right; }
.stack > * + * { margin-top: 1rem; }

/* --- topbar --- */
.topbar { background: var(--surface); border-bottom: 1px solid var(--border); }
.topbar__inner {
  display: flex; align-items: center; gap: 1.25rem;
  padding-top: .75rem; padding-bottom: .75rem;
}
.topbar__brand { font-weight: 600; text-decoration: none; color: var(--text); }
.topbar__nav { display: flex; gap: 1rem; margin-right: auto; flex-wrap: wrap; }
.topbar__nav a { text-decoration: none; color: var(--muted); font-size: .9rem; }
.topbar__nav a.is-active, .topbar__nav a:hover { color: var(--text); }

.page-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem;
}
.page-head--tight { margin-bottom: .75rem; align-items: center; }
.page-head__actions { display: flex; align-items: center; gap: .75rem; }

/* --- cards --- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.card--centered { text-align: center; }
.card--centered .stack { text-align: left; }
.survey-header { margin-bottom: 1.5rem; }

.split { display: grid; grid-template-columns: 1fr; gap: 1.25rem; }
@media (min-width: 900px) { .split { grid-template-columns: 1.35fr 1fr; align-items: start; } }

/* --- forms --- */
.field { display: block; margin-bottom: .75rem; }
.field__label { display: block; font-size: .85rem; color: var(--muted); margin-bottom: .3rem; }
input[type=text], input[type=password], input[type=number], input[type=date], select, textarea {
  width: 100%; padding: .55rem .65rem;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--text);
  font: inherit;
}
textarea { resize: vertical; }
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px;
}
.check { display: flex; gap: .6rem; align-items: flex-start; font-size: .9rem; }
.check input { margin-top: .25rem; }
.grid-2 { display: grid; grid-template-columns: 1fr; gap: 0 1rem; }
@media (min-width: 640px) { .grid-2 { grid-template-columns: 1fr 1fr; } }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  padding: .55rem .9rem; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font: inherit; cursor: pointer; text-decoration: none; white-space: nowrap;
}
.btn:hover { background: var(--surface-alt); }
.btn--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn--primary:hover { filter: brightness(1.08); background: var(--accent); }
.btn--ghost { border-color: transparent; background: transparent; color: var(--muted); }
.btn--small { padding: .3rem .55rem; font-size: .85rem; }
.btn--danger { color: var(--danger); border-color: var(--border); }
.btn--block { width: 100%; margin-top: 1.5rem; padding: .7rem; font-size: 1rem; }
.btn[disabled] { opacity: .55; cursor: default; }

.form-error {
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--danger) 40%, transparent);
  color: var(--danger);
  border-radius: 8px; padding: .6rem .75rem; font-size: .9rem;
}

/* --- questions --- */
.question { padding: 1.25rem 0; border-top: 1px solid var(--border); }
.question:first-child { border-top: 0; padding-top: 0; }
.question__label { display: block; font-weight: 500; margin-bottom: .15rem; }
.question__req { color: var(--danger); margin-left: .15rem; }
.question__help { color: var(--muted); font-size: .85rem; margin-bottom: .5rem; }
.question__error { color: var(--danger); font-size: .85rem; margin-top: .4rem; }
.question.has-error { border-left: 3px solid var(--danger); padding-left: .75rem; }

.scale { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .5rem; }
.scale__btn {
  flex: 1 1 2.5rem; min-width: 2.5rem; padding: .55rem .25rem;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--text);
  font: inherit; cursor: pointer;
}
.scale__btn:hover { background: var(--surface-alt); }
.scale__btn[aria-pressed="true"] {
  background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600;
}
.scale__ends {
  display: flex; justify-content: space-between;
  font-size: .8rem; color: var(--muted); margin-top: .35rem;
}
.choices { display: flex; flex-direction: column; gap: .5rem; margin-top: .5rem; }
.choice {
  display: flex; align-items: center; gap: .6rem;
  padding: .55rem .7rem; border: 1px solid var(--border); border-radius: 8px; cursor: pointer;
}
.choice:hover { background: var(--surface-alt); }
.choice input { margin: 0; }

.tick {
  width: 3rem; height: 3rem; margin: 0 auto 1rem;
  display: grid; place-items: center; border-radius: 50%;
  background: color-mix(in srgb, var(--success) 15%, transparent);
  color: var(--success); font-size: 1.5rem;
}

/* --- tables --- */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.table th, .table td {
  text-align: left; padding: .6rem .65rem;
  border-bottom: 1px solid var(--border); vertical-align: top;
}
.table th { font-weight: 600; color: var(--muted); font-size: .8rem; white-space: nowrap; }
.table td.actions, .table th.actions { white-space: nowrap; text-align: right; }
.table td.actions .btn + .btn { margin-left: .3rem; }
.table--responses td { max-width: 22rem; }
.table code { font-size: .85em; }

.badge {
  display: inline-block; padding: .1rem .45rem; border-radius: 999px;
  font-size: .75rem; font-weight: 600; border: 1px solid var(--border); color: var(--muted);
}
.badge--active, .badge--verified, .badge--pending {
  color: var(--success); border-color: color-mix(in srgb, var(--success) 40%, transparent);
  background: color-mix(in srgb, var(--success) 12%, transparent);
}
.badge--pending { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  background: color-mix(in srgb, var(--accent) 12%, transparent); }
.badge--revoked, .badge--expired, .badge--closed {
  color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, transparent);
  background: color-mix(in srgb, var(--danger) 12%, transparent);
}

/* --- dashboard --- */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem; margin-bottom: 1.25rem; }
.tile {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1rem; box-shadow: var(--shadow);
}
.tile__value { font-size: 1.6rem; font-weight: 600; line-height: 1.2; }
.tile__label { font-size: .8rem; color: var(--muted); }

.stat { padding: .85rem 0; border-top: 1px solid var(--border); }
.stat:first-child { border-top: 0; padding-top: 0; }
.stat__head { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; }
.stat__value { font-weight: 600; white-space: nowrap; }
.bar { display: flex; align-items: center; gap: .6rem; margin-top: .35rem; font-size: .85rem; }
.bar__label { flex: 0 0 8rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar__track { flex: 1; height: .5rem; background: var(--surface-alt); border-radius: 999px; overflow: hidden; }
.bar__fill { height: 100%; background: var(--accent); border-radius: 999px; }
.bar__count { flex: 0 0 2.5rem; text-align: right; color: var(--muted); }
.samples { margin: .35rem 0 0; padding-left: 1.1rem; color: var(--muted); font-size: .88rem; }

.filters { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0 1rem; align-items: end; margin-bottom: 1rem; }
.filters__actions { display: flex; gap: .5rem; margin-bottom: .75rem; }
.pager { display: flex; align-items: center; gap: 1rem; margin-top: 1rem; }

/* --- builder --- */
.q-editor { border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; background: var(--surface-alt); }
.q-editor__head { display: flex; align-items: center; gap: .5rem; margin-bottom: .75rem; }
.q-editor__type { font-size: .75rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); margin-right: auto; }
.q-editor__opts { display: flex; flex-direction: column; gap: .4rem; }
.q-editor__opt { display: flex; gap: .4rem; }
.preview { border: 1px dashed var(--border); border-radius: var(--radius); padding: 1rem; }
.preview .question:first-child { padding-top: 0; }

.copy-row { display: flex; gap: .5rem; }
.copy-row input { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85rem; }
.bulk textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85rem; margin-top: .5rem; }
.bulk summary { cursor: pointer; color: var(--accent); font-size: .9rem; }
.add-question { display: flex; gap: .5rem; align-items: center; }
.add-question select { width: auto; }