:root {
  --bg: #E9EDF1;
  --surface: #FFFFFF;
  --ink: #16202B;
  --ink-2: #4A5664;
  --line: #CBD3DC;
  --cobalt: #2441C9;
  --cobalt-ink: #1A2F94;
  --ok: #1F7A4D;
  --bad: #B3261E;
  --paper: #FDFDFB;
  --paper-ink: #2A2A2A;
  --radius: 6px;
  --ui: 'Commissioner', system-ui, sans-serif;
  --mono: 'Fira Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.5 var(--ui);
  font-variation-settings: 'FLAR' 0, 'VOLM' 0;
}
a { color: var(--cobalt); }
a:hover { color: var(--cobalt-ink); }
:focus-visible { outline: 3px solid var(--cobalt); outline-offset: 2px; }

h1 { font-size: 2rem; line-height: 1.15; font-weight: 750; letter-spacing: -0.02em; margin: 0 0 1rem; }
h2 { font-size: 1.25rem; font-weight: 600; margin: 2.5rem 0 1rem; }
.lead { font-size: 1.125rem; color: var(--ink-2); max-width: 34em; }
.muted { color: var(--ink-2); }

/* Κεφαλίδα */
.top {
  display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap;
  padding: 0.875rem 1.5rem; background: var(--surface); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 750; font-size: 1.125rem; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.brand span { color: var(--ink-2); font-weight: 400; }
.who { color: var(--ink-2); font-size: 0.875rem; margin-left: auto; }
.nav { display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap; }
.nav a { color: var(--ink); text-decoration: none; font-weight: 500; padding: 0.25rem 0; border-bottom: 2px solid transparent; }
.nav a[aria-current='page'] { border-bottom-color: var(--cobalt); }
.nav form { margin: 0; }

main { padding: 2.5rem 1.5rem 4rem; }
.narrow { max-width: 30rem; margin: 6vh auto 0; }
.wide { max-width: 72rem; margin: 0 auto; }

/* Φόρμες */
.stack { display: grid; gap: 1rem; margin-top: 2rem; }
.field { display: grid; gap: 0.375rem; min-width: 0; }
.field > span:first-child { font-weight: 500; font-size: 0.9375rem; }
input:not([type='checkbox']):not([type='radio']) {
  width: 100%; font: inherit; color: var(--ink);
  padding: 0.6875rem 0.75rem; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius);
}
input:focus { border-color: var(--cobalt); outline: 1px solid var(--cobalt); }
input[aria-invalid='true'] { border-color: var(--bad); }
fieldset:disabled { opacity: 0.45; }
fieldset:disabled input { background: transparent; }

button, .button {
  font: inherit; font-weight: 600; cursor: pointer; border-radius: var(--radius);
  padding: 0.6875rem 1.125rem; border: 1px solid transparent; text-decoration: none; display: inline-block;
}
button:disabled { cursor: not-allowed; opacity: 0.5; }
.primary { background: var(--cobalt); color: #fff; }
.primary:hover:not(:disabled) { background: var(--cobalt-ink); color: #fff; }
.secondary { background: var(--surface); color: var(--ink); border-color: var(--line); }
.secondary:hover:not(:disabled) { border-color: var(--ink-2); }
.danger { background: var(--surface); color: var(--bad); border-color: #E7B8B4; }
.danger:hover:not(:disabled) { background: #FBEDEC; border-color: var(--bad); }
.row-actions { display: flex; flex-wrap: wrap; gap: 0.375rem; justify-content: flex-end; }
.s-cancelled { background: #EEF1F4; color: var(--ink-2); }
.small { padding: 0.375rem 0.75rem; font-size: 0.875rem; }
.big { padding: 0.9375rem 1.5rem; font-size: 1.0625rem; }
.link { background: none; border: 0; padding: 0; color: var(--ink-2); font-weight: 500; }
.link:hover { color: var(--ink); text-decoration: underline; }

.error, .field-error { color: var(--bad); font-weight: 500; margin: 0; }
.field-error { font-size: 0.875rem; }
.hint { color: var(--ink-2); font-size: 0.9375rem; margin: 0.5rem 0 0; }
.hint.ok { color: var(--ok); }
.hint.warn { color: var(--bad); }
.banner { max-width: 72rem; margin: 0 auto 1.5rem; padding: 0.75rem 1rem; background: #FFF4D6; border: 1px solid #E8C766; border-radius: var(--radius); }
.flash { padding: 0.75rem 1rem; background: var(--surface); border-left: 4px solid var(--cobalt); }

/* Χώρος εγγραφής: φόρμα + απόδειξη */
.workspace {
  max-width: 72rem; margin: 0 auto;
  display: grid; grid-template-columns: minmax(0, 1fr) 21rem; gap: 3rem; align-items: start;
}
.reg { min-width: 0; }
.group { border: 0; padding: 0; margin: 0 0 2.25rem; min-width: 0; }
.group legend { font-weight: 600; font-size: 1.125rem; padding: 0; margin-bottom: 0.875rem; }
.vat-row { display: flex; gap: 0.75rem; align-items: end; }
.vat-row .field { flex: 0 1 14rem; }
.vat-row input { font-family: var(--mono); font-size: 1.125rem; letter-spacing: 0.08em; }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem 1.25rem; }
.grid3 { display: grid; grid-template-columns: 1fr 1fr 11rem; gap: 1rem 1.25rem; }
input.locked:not([type='checkbox']):not([type='radio']) { font-family: var(--mono); background: var(--bg); color: var(--ink-2); cursor: default; }
input.locked:not([type='checkbox']):not([type='radio']):focus { border-color: var(--line); outline: none; }
.checks { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; }
.checks label { display: flex; gap: 0.5rem; align-items: center; }
.checks input { width: 1.125rem; height: 1.125rem; accent-color: var(--cobalt); }

.actions { display: grid; gap: 1rem; justify-items: start; padding-top: 0.5rem; }
.success { background: var(--surface); border-left: 4px solid var(--ok); padding: 1.25rem 1.5rem; max-width: 40rem; }
.success.waiting { border-left-color: #C99A00; }
.success h2 { margin: 0 0 0.5rem; }
.contract-note { padding: 0.75rem 1rem; background: #E4E8FB; border-radius: var(--radius); color: var(--cobalt-ink); }
.creds { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; font-family: var(--mono); font-size: 1.0625rem; padding: 0.75rem 1rem; background: var(--bg); border-radius: var(--radius); }

/* Η απόδειξη: θερμικό χαρτί με οδοντωτό κάτω άκρο */
.receipt-wrap { position: sticky; top: 1.5rem; }
.receipt {
  position: relative;
  background: var(--paper); color: var(--paper-ink);
  font: 400 0.8125rem/1.55 var(--mono);
  padding: 1.5rem 1.375rem 2rem;
  filter: drop-shadow(0 1px 0 #D5DBE2) drop-shadow(0 8px 14px rgba(22, 32, 43, 0.08));
  --tooth: 10px;
  -webkit-mask: conic-gradient(from -45deg at bottom, #0000, #000 1deg 89deg, #0000 90deg) bottom / var(--tooth) 51% repeat-x,
                linear-gradient(#000 0 0) top / 100% calc(100% - var(--tooth) / 2) no-repeat;
  mask: conic-gradient(from -45deg at bottom, #0000, #000 1deg 89deg, #0000 90deg) bottom / var(--tooth) 51% repeat-x,
        linear-gradient(#000 0 0) top / 100% calc(100% - var(--tooth) / 2) no-repeat;
}
.r-head { text-align: center; font-weight: 500; letter-spacing: 0.12em; margin: 0; }
.r-sub { text-align: center; margin: 0; color: #6B6B6B; }
.receipt hr { border: 0; border-top: 1px dashed #A9A9A9; margin: 0.875rem 0; }
.receipt dl { margin: 0; display: grid; gap: 0.375rem; }
.receipt dl > div { display: grid; grid-template-columns: 6.5rem 1fr; gap: 0.5rem; }
.receipt dt { color: #6B6B6B; }
.receipt dd { margin: 0; overflow-wrap: anywhere; }
.r-empty { color: #6B6B6B; }
.r-stamp {
  position: absolute; right: 1.25rem; bottom: 1.5rem; margin: 0;
  font: 750 1.125rem/1 var(--ui); letter-spacing: 0.08em; color: var(--cobalt);
  border: 3px solid var(--cobalt); border-radius: 4px; padding: 0.375rem 0.625rem;
  transform: rotate(-8deg); opacity: 0.85;
}
.receipt.stamped { padding-bottom: 4.75rem; }
.stamped .r-stamp { animation: stamp 260ms cubic-bezier(.2, .9, .3, 1.2); }
@keyframes stamp { from { transform: rotate(-8deg) scale(1.8); opacity: 0; } to { transform: rotate(-8deg) scale(1); opacity: 0.85; } }

/* Πίνακες */
.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
th, td { text-align: left; padding: 0.625rem 0.875rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; background: #F4F6F8; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
tr.inactive td { color: var(--ink-2); }
td form { margin: 0; }
.mono { font-family: var(--mono); font-size: 0.875rem; }
.nowrap { white-space: nowrap; }
.badge { display: inline-block; font-size: 0.8125rem; font-weight: 500; padding: 0.125rem 0.5rem; border-radius: 999px; background: #EEF1F4; white-space: nowrap; }
.s-finalized { background: #DDF1E6; color: var(--ok); }
.s-failed { background: #F9DEDC; color: var(--bad); }
.s-created { background: #FFF0C7; color: #7A5600; }
.s-awaiting_verification { background: #FFF0C7; color: #7A5600; }
.s-dry_run { background: #E4E8FB; color: var(--cobalt-ink); }
.err-detail { color: var(--bad); font-size: 0.8125rem; margin-top: 0.25rem; max-width: 28rem; }
.err-detail.info { color: var(--ink-2); }
.empty { padding: 2rem; background: var(--surface); border: 1px dashed var(--line); border-radius: var(--radius); }
.status-line { display: flex; flex-wrap: wrap; gap: 0.75rem 2rem; align-items: center; }
.status-line .inline { display: inline; margin-left: 0.5rem; }
.bad { color: var(--bad); }
.partner strong { display: block; font-weight: 600; }
.partner span { display: block; color: var(--ink-2); font-size: 0.8125rem; }
.filter { margin-bottom: 1rem; max-width: 24rem; }
select { font: inherit; color: var(--ink); padding: 0.625rem 0.75rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); width: 100%; }
.add-dealer { display: grid; grid-template-columns: 1fr 1fr auto; gap: 1rem; align-items: end; margin-bottom: 1rem; }

@media (max-width: 960px) {
  .workspace { grid-template-columns: 1fr; gap: 2rem; }
  .receipt-wrap { position: static; max-width: 24rem; }
}
@media (max-width: 640px) {
  main { padding: 1.5rem 1rem 3rem; }
  .top { padding: 0.75rem 1rem; gap: 0.75rem 1rem; }
  .who { margin-left: 0; order: 3; width: 100%; }
  h1 { font-size: 1.625rem; }
  .grid2, .grid3, .add-dealer { grid-template-columns: 1fr; }
  .vat-row { flex-wrap: wrap; }
  .vat-row .field { flex: 1 1 100%; }
}
@media (prefers-reduced-motion: reduce) {
  .stamped .r-stamp { animation: none; }
}