/* Collette — foglio di stile */

:root {
  --paper: #eef0ec;
  --surface: #ffffff;
  --surface-sunk: #f6f7f4;
  --ink: #14181a;
  --ink-soft: #5c6560;
  --ink-faint: #8b938d;
  --line: #d9ded8;
  --line-strong: #b9c1b8;
  --paid: #1f6b4e;
  --paid-soft: #dcebe2;
  --due: #a8600f;
  --due-soft: #f6e8d4;
  --danger: #a32b1e;
  --focus: #1f6b4e;

  --radius: 4px;
  --shell: 46rem;
  --sans: 'Schibsted Grotesk', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'Spline Sans Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #101311;
    --surface: #191d1a;
    --surface-sunk: #141815;
    --ink: #e8ece7;
    --ink-soft: #9aa49c;
    --ink-faint: #6d7771;
    --line: #2a302c;
    --line-strong: #3c443e;
    --paid: #6fc79c;
    --paid-soft: #1d3129;
    --due: #e0a75c;
    --due-soft: #33281a;
    --danger: #e08b7e;
    --focus: #6fc79c;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  font-feature-settings: 'ss01';
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

button, input, select, textarea { font: inherit; color: inherit; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}

a { color: inherit; }

.shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 1.75rem 1.25rem 6rem;
}

/* ---------- intestazione ---------- */

.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line-strong);
  margin-bottom: 1.75rem;
}

.masthead h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.masthead .tally {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

/* ---------- pulsanti ---------- */

.btn {
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background 0.12s ease, border-color 0.12s ease;
}
.btn:hover { border-color: var(--ink-soft); }
.btn-primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-primary:hover { opacity: 0.88; }
.btn-quiet { border-color: transparent; background: transparent; color: var(--ink-soft); padding: 0.3rem 0.5rem; }
.btn-quiet:hover { color: var(--ink); background: var(--surface-sunk); }
.btn-danger { color: var(--danger); border-color: transparent; background: transparent; }
.btn-danger:hover { background: var(--surface-sunk); }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }

/* ---------- campi ---------- */

.field {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 0.45rem 0.6rem;
}
.field:focus { border-color: var(--focus); outline: none; }
.field-bare {
  border: none;
  background: transparent;
  border-bottom: 1px solid transparent;
  border-radius: 0;
  padding: 0.2rem 0;
}
.field-bare:hover { border-bottom-color: var(--line); }
.field-bare:focus { border-bottom-color: var(--focus); outline: none; }
.field-num { font-family: var(--mono); font-variant-numeric: tabular-nums; text-align: right; }

label.stack { display: block; }
label.stack > span {
  display: block;
  font-size: 0.75rem;
  color: var(--ink-soft);
  margin-bottom: 0.25rem;
}

/* ---------- elenco collette ---------- */

.series { margin-bottom: 2.25rem; }

.series-head {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}
.series-head h2 {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.series-head .count {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
}

.series-body {
  border-left: 2px solid var(--line-strong);
  padding-left: 0.9rem;
  display: grid;
  gap: 0.5rem;
}

.loose { display: grid; gap: 0.5rem; }

.card {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  cursor: pointer;
  text-decoration: none;
  transition: border-color 0.12s ease;
}
.card:hover { border-color: var(--line-strong); }

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}
.card-title { font-weight: 600; letter-spacing: -0.01em; }
.card-date {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.card-meta {
  margin-top: 0.35rem;
  font-size: 0.8125rem;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.card-meta .money { font-family: var(--mono); }
.card-meta .open { color: var(--due); }
.card-meta .done { color: var(--paid); }

/* la barra a segmenti: un segmento per partecipante */
.quotabar {
  margin-top: 0.6rem;
  display: flex;
  gap: 2px;
  height: 6px;
}
.quotabar span {
  flex: 1;
  background: var(--surface-sunk);
  border: 1px solid var(--line);
  border-radius: 1px;
}
.quotabar span.on { background: var(--paid); border-color: var(--paid); }

/* ---------- dettaglio ---------- */

.detail-nav { margin-bottom: 1.25rem; }

.detail-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
  width: 100%;
  margin-bottom: 0.5rem;
}

.detail-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.25rem;
  align-items: flex-end;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}
.detail-controls .grow { flex: 1 1 10rem; }

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  cursor: pointer;
  font-size: 0.875rem;
  white-space: nowrap;
  padding-bottom: 0.35rem;
}
.toggle input { position: absolute; opacity: 0; pointer-events: none; }
.toggle .track {
  width: 2.25rem;
  height: 1.25rem;
  border-radius: 1rem;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  position: relative;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.toggle .track::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 0.875rem; height: 0.875rem;
  border-radius: 50%;
  background: var(--line-strong);
  transition: transform 0.15s ease, background 0.15s ease;
}
.toggle input:checked + .track { background: var(--paid); border-color: var(--paid); }
.toggle input:checked + .track::after { transform: translateX(1rem); background: var(--surface); }
.toggle input:focus-visible + .track { outline: 2px solid var(--focus); outline-offset: 2px; }

section.block { padding: 1.5rem 0; border-bottom: 1px solid var(--line); }
section.block > header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}
section.block h3 {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
section.block header .hint { font-size: 0.8125rem; color: var(--ink-faint); }

/* oggetti del regalo */
.item-row {
  display: grid;
  grid-template-columns: 1fr 6.5rem 2rem;
  gap: 0.5rem;
  align-items: center;
  padding: 0.35rem 0;
  border-bottom: 1px dotted var(--line);
}
.item-row .links { grid-column: 1 / -1; display: flex; align-items: center; gap: 0.4rem; }
.item-row .links input { flex: 1; font-size: 0.8125rem; color: var(--ink-soft); }
.item-row .links a { color: var(--ink-soft); font-size: 0.8125rem; text-decoration: none; border-bottom: 1px solid var(--line-strong); }

.total-line {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-top: 0.75rem;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}
.total-line .label { font-family: var(--sans); color: var(--ink-soft); font-size: 0.875rem; }
.total-line .value { font-size: 1.125rem; font-weight: 600; }

/* riquadro quota: l'elemento forte della pagina */
.quota {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  margin: 1.5rem 0;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.quota .amount {
  font-family: var(--mono);
  font-size: 2.25rem;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.04em;
}
.quota .formula { font-size: 0.8125rem; opacity: 0.72; margin-top: 0.4rem; }
.quota .right { text-align: right; font-size: 0.8125rem; opacity: 0.85; font-variant-numeric: tabular-nums; }
.quota .right strong { font-family: var(--mono); font-weight: 500; }

/* partecipanti */
.person {
  border-bottom: 1px solid var(--line);
  padding: 0.6rem 0;
}
.person-main {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.person-main .name { flex: 1; min-width: 0; }
.person-main .self {
  font-size: 0.6875rem;
  color: var(--ink-faint);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.05rem 0.45rem;
}
.person-main .state {
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.person-main .state.due { color: var(--due); }
.person-main .state.ok { color: var(--paid); }

.pay {
  display: grid;
  grid-template-columns: 7rem 1fr 1fr;
  gap: 0.5rem;
  margin-top: 0.55rem;
  padding: 0.6rem;
  background: var(--surface-sunk);
  border-radius: var(--radius);
}
.pay.hidden { display: none; }
.pay .full { grid-column: 1 / -1; }

.add-people {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.85rem;
  flex-wrap: wrap;
}
.add-people input { flex: 1 1 12rem; }

/* ---------- riquadri modali ---------- */

.sheet-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 14, 12, 0.45);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 1rem;
  z-index: 50;
}
@media (min-width: 40rem) { .sheet-backdrop { align-items: center; } }

.sheet {
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  width: min(30rem, 100%);
  max-height: 85vh;
  overflow: auto;
  padding: 1.25rem;
}
.sheet h2 { margin: 0 0 1rem; font-size: 1.125rem; letter-spacing: -0.02em; }
.sheet h4 { margin: 1.5rem 0 0.5rem; font-size: 0.875rem; color: var(--ink-soft); font-weight: 600; }
.sheet .row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  padding: 0.35rem 0;
  border-bottom: 1px dotted var(--line);
}
.sheet .row .grow { flex: 1; min-width: 0; }
.sheet .actions { display: flex; justify-content: flex-end; gap: 0.5rem; margin-top: 1.5rem; }

/* ---------- vuoto, errori, avvisi ---------- */

.empty {
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--ink-soft);
}
.empty p { margin: 0 0 1rem; }

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(1.25rem + env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  background: var(--ink);
  color: var(--paper);
  padding: 0.55rem 0.9rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  z-index: 100;
  max-width: 90vw;
}
.toast.err { background: var(--danger); }

.fab {
  position: fixed;
  right: 1.25rem;
  bottom: calc(1.25rem + env(safe-area-inset-bottom, 0px));
  z-index: 20;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.18);
}

.hidden { display: none !important; }

@media (max-width: 30rem) {
  .pay { grid-template-columns: 1fr 1fr; }
  .quota .amount { font-size: 1.875rem; }
}

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