/* Piste Carrera — tema scuro sobrio: grafite, un solo colore di risalto (blu), titoli puliti.
   I colori vivaci restano ai pezzi della pista, così nel disegno si leggono subito. */
:root {
  --bg: #0f1115;
  --surface: #171a20;
  --surface-2: #1e222a;
  --ink: #eceef2;
  --muted: #9aa1ad;
  --line: #2a2f39;
  --line-strong: #3a404c;
  --accent: #5b8cff;
  --accent-hover: #6f9bff;
  --accent-ink: #ffffff;
  --accent-soft: rgba(91, 140, 255, .14);
  --high: #f6c945;
  --danger: #ff6b61;
  --radius: 12px;
  --body: "Figtree", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 var(--body);
  padding: env(safe-area-inset-top, 0px) max(16px, env(safe-area-inset-right, 0px)) calc(40px + env(safe-area-inset-bottom, 0px)) max(16px, env(safe-area-inset-left, 0px));
  overflow-x: hidden;
}
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
code { font: 500 .82em var(--mono); color: var(--muted); }
h1, h2 { text-wrap: balance; }

/* Barra in alto */
.bar { max-width: 1160px; margin: 0 auto; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 8px 12px; padding-top: 12px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; font-size: 1.15rem; letter-spacing: -.01em; min-height: 44px; }
.brand-flag { width: 20px; height: 20px; border-radius: 5px; background: conic-gradient(#eceef2 0 25%, #20242c 0 50%, #eceef2 0 75%, #20242c 0) 0 0 / 10px 10px; box-shadow: 0 0 0 1.5px var(--line-strong); }
.logout { justify-self: end; grid-row: 1; grid-column: 2; color: var(--muted); padding: 8px 4px; }
.tabs { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 4px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 4px; }
.tabs a { display: grid; place-items: center; min-height: 44px; border-radius: 9px; color: var(--muted); text-decoration: none; font-weight: 600; font-size: .92rem; text-align: center; line-height: 1.15; padding: 4px 6px; }
.tabs a:hover { color: var(--ink); }
.tabs a[aria-current] { background: var(--surface-2); color: var(--ink); box-shadow: inset 0 -2px 0 var(--accent); }

#app { max-width: 1160px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; padding-top: 20px; }

/* Testate */
.top { display: flex; justify-content: space-between; align-items: flex-end; gap: 12px; flex-wrap: wrap; }
.top h1 { font-size: 1.75rem; line-height: 1.15; font-weight: 700; letter-spacing: -.02em; margin: 0; overflow-wrap: anywhere; }
.sub { color: var(--muted); font-size: .92rem; margin: 4px 0 0; }
.lbl { font-size: .95rem; color: var(--ink); font-weight: 700; margin: 0; }
.note { color: var(--muted); font-size: .88rem; margin: 0; }
.link { background: none; border: 0; color: var(--accent); font-weight: 600; font-size: .95rem; min-height: 44px; }
.back { color: var(--muted); text-decoration: none; font-weight: 600; min-height: 44px; display: inline-flex; align-items: center; justify-self: start; }
.back:hover { color: var(--ink); }

/* Pulsanti: principale pieno blu, secondario a contorno, pericolo rosso */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; background: var(--accent); color: var(--accent-ink); border: 1.5px solid var(--accent); border-radius: 10px; padding: 12px 18px; font-weight: 700; font-size: 1.02rem; line-height: 1.2; min-height: 52px; width: 100%; text-decoration: none; text-align: center; transition: background-color .15s, border-color .15s; }
.btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: default; transform: none; }
.btn.small { min-height: 44px; font-size: .95rem; padding: 9px 16px; }
.btn.inline { width: auto; }
.btn.secondary { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn.secondary:hover { background: var(--surface-2); border-color: #4a5160; }
.btn.danger { background: var(--danger); border-color: var(--danger); color: #1a0705; }
.btn.ghost-danger { background: transparent; color: var(--danger); border-color: rgba(255, 107, 97, .45); }
.btn.ghost-danger:hover { background: rgba(255, 107, 97, .1); }
.icon-btn { background: var(--surface-2); border: 1px solid var(--line-strong); min-width: 44px; min-height: 44px; border-radius: 10px; font-size: 1.3rem; line-height: 1; color: var(--ink); display: inline-grid; place-items: center; }
.icon-btn:hover { border-color: #4a5160; }
.icon-btn:active { background: var(--line); }
.row-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.row-actions > .btn { flex: 1 1 140px; }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 16px; display: grid; gap: 14px; }
.panel.flush { padding: 4px 0; }
.empty-state { text-align: center; color: var(--muted); padding: 24px 12px; margin: 0; }
.empty-state.panel { justify-items: center; }
.empty-state p { margin: 0; max-width: 52ch; }

/* Elenco circuiti */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr)); gap: 12px; }
.track-card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; color: var(--ink); text-decoration: none; display: grid; transition: border-color .15s; }
.track-card:hover { border-color: var(--line-strong); }
.track-card:active { border-color: var(--accent); }
.thumb { background: #12151b; aspect-ratio: 4 / 3; display: grid; place-items: center; padding: 12px; border-bottom: 1px solid var(--line); }
.thumb svg { width: 100%; height: 100%; }
.track-info { padding: 12px 14px 14px; display: grid; gap: 4px; }
.track-info strong { font-size: 1.08rem; font-weight: 700; line-height: 1.25; overflow-wrap: anywhere; }
.meta { color: var(--muted); font-size: .88rem; font-variant-numeric: tabular-nums; }
.badges { display: flex; gap: 6px; flex-wrap: wrap; }
.badges:empty { display: none; }
.badge { font-size: .78rem; font-weight: 600; padding: 2px 9px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--line-strong); color: var(--ink); }
.badge.high { border-color: rgba(246, 201, 69, .5); color: var(--high); }

/* Tabella pezzi */
.count { margin: 0; display: grid; justify-items: end; gap: 0; }
.count b { font-size: 2rem; font-weight: 700; line-height: 1; color: var(--ink); font-variant-numeric: tabular-nums; }
.count small { color: var(--muted); font-size: .8rem; }
.save-status { color: var(--muted); font-size: .78rem; min-height: 1.1em; }
.pieces { width: 100%; border-collapse: collapse; }
.pieces thead { display: none; }
.pieces tr.group th { text-align: left; font-size: .95rem; font-weight: 700; color: var(--ink); padding: 16px 14px 6px; }
.pieces td { padding: 10px 8px; border-top: 1px solid var(--line); vertical-align: middle; }
.pieces tr.group + tr td { border-top: 0; }
.pieces td.c-ico { width: 56px; padding-left: 12px; }
.piece-ico { width: 44px; height: 44px; display: block; background: #12151b; border-radius: 8px; padding: 3px; }
.c-name strong { display: block; font-weight: 600; line-height: 1.25; }
.m-only { display: block; color: var(--muted); font-size: .8rem; margin-top: 2px; }
.pieces .c-code, .pieces .c-meas { display: none; }
.pieces td.c-qty { width: 1%; padding-right: 12px; }
.stepper { display: flex; align-items: center; gap: 4px; }
.stepper input { width: 3.2em; min-width: 0; text-align: center; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--bg); font: 600 16px var(--mono); min-height: 44px; padding: 0; -moz-appearance: textfield; }
.stepper input::-webkit-outer-spin-button, .stepper input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.stepper input:focus { border-color: var(--accent); outline: none; }

/* Nuovo circuito */
.styles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.style-opt { background: var(--surface-2); border: 1.5px solid var(--line); border-radius: var(--radius); padding: 12px; text-align: left; display: grid; gap: 4px; align-content: start; min-height: 88px; transition: border-color .15s; }
.style-opt:hover { border-color: var(--line-strong); }
.style-opt strong { font-weight: 700; font-size: 1rem; }
.style-opt span { color: var(--muted); font-size: .82rem; line-height: 1.35; }
.style-opt[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); }
.room-fields { display: flex; align-items: flex-end; gap: 10px; }
.field { display: grid; gap: 6px; flex: 1 1 0; min-width: 0; }
.field-lbl { font-size: .85rem; color: var(--muted); font-weight: 600; }
.field-box { display: flex; align-items: center; border: 1px solid var(--line-strong); border-radius: 10px; background: var(--bg); min-height: 48px; padding-right: 12px; }
.field-box:focus-within { border-color: var(--accent); }
.field-box input { flex: 1 1 auto; min-width: 0; width: 100%; border: 0; background: transparent; font: 600 16px var(--mono); padding: 10px 12px; min-height: 46px; -moz-appearance: textfield; }
.field-box input::placeholder { color: #6b7280; font-family: var(--body); font-weight: 400; }
.field-box input:focus { outline: none; }
.field-box input::-webkit-outer-spin-button, .field-box input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.unit { color: var(--muted); font-size: .9rem; }
.times { color: var(--muted); font-size: 1.2rem; padding-bottom: 12px; }
.results { display: grid; gap: 12px; }
.results > .sub { margin: 0; }
.proposals { display: grid; grid-template-columns: minmax(0, 1fr); gap: 14px; }
.proposal { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 14px; display: grid; gap: 12px; align-content: start; }
.proposal-head { display: flex; align-items: baseline; gap: 4px 10px; flex-wrap: wrap; }
.proposal-head strong { font-size: 1.1rem; font-weight: 700; }
.drawing { background: #12151b; border: 1px solid var(--line); border-radius: 10px; padding: 8px; aspect-ratio: 4 / 3; display: grid; place-items: center; }
.drawing svg { width: 100%; height: 100%; display: block; }

/* Legenda: colore, quanti, nome e codice di ogni tipo di pezzo */
.sw { display: inline-block; width: 14px; height: 14px; border-radius: 4px; background: var(--c); flex: none; box-shadow: inset 0 0 0 3px rgba(15, 17, 21, .55); }
.legend { display: grid; gap: 10px; }
.legend-pieces { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.legend-pieces li { display: grid; grid-template-columns: 14px 2.6em minmax(0, 1fr) auto; gap: 8px; align-items: center; padding: 5px 0; border-top: 1px solid var(--line); font-size: .9rem; }
.legend-pieces li:first-child { border-top: 0; }
.legend-pieces b { font: 600 .9rem var(--mono); text-align: right; }
.legend-marks { display: flex; gap: 6px 14px; flex-wrap: wrap; font-size: .8rem; color: var(--muted); margin: 0; }
.legend-marks span { display: inline-flex; align-items: center; gap: 6px; }
.legend-marks i { display: inline-block; width: 18px; height: 10px; border-radius: 3px; }
.lg-start { background: conic-gradient(#f4f1ea 0 25%, #14161c 0 50%, #f4f1ea 0 75%, #14161c 0) 0 0 / 6px 6px; }
.lg-high { background: #8e98aa; box-shadow: 3px 3px 0 #000; }
.lg-joint { background: linear-gradient(90deg, #8e98aa 0 42%, transparent 42% 58%, #8e98aa 58%); }

.save-area .btn { width: 100%; }
.saved { margin: 0; color: var(--muted); min-height: 44px; display: flex; align-items: center; gap: 6px; }
.saved a { font-weight: 600; }
.inline-form { display: flex; gap: 8px; flex-wrap: wrap; }
.inline-form input { flex: 1 1 180px; min-width: 0; border: 1px solid var(--line-strong); border-radius: 10px; padding: 10px 12px; background: var(--bg); font-size: 16px; min-height: 44px; }
.inline-form input:focus { border-color: var(--accent); outline: none; }
.inline-form .btn { width: auto; flex: 0 0 auto; }

/* Dettaglio */
.detail { display: grid; gap: 16px; grid-template-columns: minmax(0, 1fr); }
.detail-side { display: grid; gap: 14px; align-content: start; }
.track .pc { cursor: pointer; }
.track.picking .pc { opacity: .28; transition: opacity .12s; }
.track.picking .pc.on { opacity: 1; }
.viewer { display: grid; gap: 8px; align-content: start; }
.pick { margin: 0; min-height: 44px; display: flex; align-items: center; gap: 4px 8px; flex-wrap: wrap; background: rgba(15, 17, 21, .9); border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; font-size: .88rem; color: var(--muted); }
.pick b { color: var(--ink); font-variant-numeric: tabular-nums; }
.pick span { color: var(--ink); }
.sequence { list-style: none; margin: 0; padding: 0; display: grid; max-height: 60vh; overflow-y: auto; overscroll-behavior: contain; }
.sequence li { display: grid; grid-template-columns: 2em 14px minmax(0, 1fr) auto; gap: 8px; align-items: center; padding: 7px 6px; border-top: 1px solid var(--line); font-size: .9rem; cursor: pointer; border-radius: 6px; min-height: 44px; }
.sequence li:first-child { border-top: 0; }
.sequence li:hover, .sequence li.on { background: var(--surface-2); }
.sequence li.on { box-shadow: inset 2px 0 0 var(--accent); }
.sequence b { font: 600 .85rem var(--mono); color: var(--muted); text-align: right; }
.sequence small { display: block; color: var(--muted); font-size: .78rem; }
.confirm { background: var(--surface-2); border: 1px solid rgba(255, 107, 97, .4); border-radius: var(--radius); padding: 14px; display: grid; gap: 10px; width: 100%; }
.confirm p { margin: 0; overflow-wrap: anywhere; }
.confirm .actions { display: flex; gap: 8px; }
.confirm .actions .btn { flex: 1; }

.toast { position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(20px + env(safe-area-inset-bottom, 0px)); background: var(--ink); color: var(--bg); padding: 10px 16px; border-radius: 12px; font-size: .9rem; font-weight: 600; z-index: 30; max-width: calc(100% - 32px); }

/* Login */
.login { max-width: 380px; margin: 16vh auto 0; display: grid; gap: 14px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 24px 20px; }
.login .brand-flag { width: 28px; height: 28px; background-size: 14px 14px; }
.login h1 { font-size: 1.75rem; font-weight: 700; letter-spacing: -.02em; line-height: 1.15; margin: 0; }
.login p { margin: 0; color: var(--muted); }
.login .lbl { font-size: .85rem; color: var(--muted); font-weight: 600; }
.login input { border: 1px solid var(--line-strong); border-radius: 10px; padding: 12px 14px; background: var(--bg); font-size: 16px; min-height: 50px; }
.login input:focus { border-color: var(--accent); outline: none; }
.login .err { color: var(--danger); }

@media (min-width: 720px) {
  .bar { grid-template-columns: auto 1fr auto; }
  .logout { grid-column: 3; }
  .tabs { grid-column: auto; justify-self: center; display: flex; width: auto; }
  .tabs a { padding: 4px 18px; }
  .top h1 { font-size: 2rem; }
  .styles { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .room-fields { max-width: 460px; }
  .pieces thead { display: table-header-group; }
  .pieces thead th { text-align: left; font-size: .78rem; color: var(--muted); font-weight: 600; padding: 10px 8px; }
  .pieces .c-code, .pieces .c-meas { display: table-cell; }
  .m-only { display: none; }
  .pieces td.c-meas { color: var(--muted); font-size: .9rem; }
  .proposals { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .section-go { max-width: 420px; }
}

@media (min-width: 1000px) {
  .detail { grid-template-columns: minmax(0, 1fr) 360px; align-items: start; }
  .viewer { position: sticky; top: 16px; }
  .drawing.big { aspect-ratio: auto; height: calc(100vh - 230px); min-height: 480px; }
}

@media (prefers-reduced-motion: no-preference) {
  .proposal, .track-card { animation: rise .2s ease-out; }
  @keyframes rise { from { transform: translateY(6px); opacity: .6; } to { transform: none; opacity: 1; } }
}