/* ---------------------------------------------------------------- Χρώματα (φωτεινό θέμα) */
:root {
  --bg: #f5f6f8; --card: #ffffff; --surface-2: #f8f9fb; --text: #111827; --muted: #6b7280; --border: #e5e7eb;
  --input-bg: #ffffff; --input-border: #d1d5db; --hover: #f3f4f6;
  --primary: #4f46e5; --primary-dark: #4338ca; --primary-soft: #eef0ff; --link: #4f46e5; --on-primary: #ffffff;
  --ok: #15803d; --ok-solid: #16a34a; --ok-bg: #dcfce7;
  --warn: #b45309; --warn-bg: #fef3c7; --err: #b91c1c; --err-bg: #fee2e2; --info-bg: #e0e7ff; --info: #3730a3;
  --sidebar: #ffffff; --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 1px 3px rgba(16, 24, 40, .06);
  --radius: 12px; --radius-sm: 8px; --sidebar-w: 236px;
  color-scheme: light;
}
/* ---------------------------------------------------------------- Σκούρο θέμα (αυτόματα ή με το κουμπί) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1115; --card: #171a21; --surface-2: #1c2029; --text: #e6e8ec; --muted: #9aa1ad; --border: #272c36;
    --input-bg: #12151b; --input-border: #333946; --hover: #222733;
    --primary: #6366f1; --primary-dark: #5458e0; --primary-soft: #23244a; --link: #a5b4fc;
    --ok: #4ade80; --ok-solid: #16a34a; --ok-bg: #12301f; --warn: #fbbf24; --warn-bg: #3a2a0c;
    --err: #f87171; --err-bg: #3b1414; --info-bg: #1e1b4b; --info: #a5b4fc;
    --sidebar: #13161c; --shadow: none;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f1115; --card: #171a21; --surface-2: #1c2029; --text: #e6e8ec; --muted: #9aa1ad; --border: #272c36;
  --input-bg: #12151b; --input-border: #333946; --hover: #222733;
  --primary: #6366f1; --primary-dark: #5458e0; --primary-soft: #23244a; --link: #a5b4fc;
  --ok: #4ade80; --ok-solid: #16a34a; --ok-bg: #12301f; --warn: #fbbf24; --warn-bg: #3a2a0c;
  --err: #f87171; --err-bg: #3b1414; --info-bg: #1e1b4b; --info: #a5b4fc;
  --sidebar: #13161c; --shadow: none;
  color-scheme: dark;
}

/* ---------------------------------------------------------------- Βάση */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
       background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.5; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 24px; font-weight: 700; letter-spacing: -.01em; margin: 0 0 16px; }
h2 { font-size: 17px; font-weight: 600; margin: 0 0 12px; }
h3 { font-weight: 600; }
.ti { font-size: 1.15em; vertical-align: -.15em; }

/* ---------------------------------------------------------------- Διάταξη: μενού στο πλάι (υπολογιστής) */
.sidebar { position: fixed; inset: 0 auto 0 0; width: var(--sidebar-w); background: var(--sidebar);
           border-right: 1px solid var(--border); display: flex; flex-direction: column; padding: 16px 12px; z-index: 40;
           overflow-y: auto; }
.sidebar .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; color: var(--text);
                  padding: 4px 8px 16px; }
.sidebar .brand:hover { text-decoration: none; }
.brand-mark { width: 32px; height: 32px; border-radius: 9px; background: var(--primary); color: #fff;
              display: inline-flex; align-items: center; justify-content: center; font-size: 18px; flex: none; }
.nav { display: flex; flex-direction: column; gap: 1px; }
.nav a, .nav button { display: flex; align-items: center; gap: 10px; padding: 7px 10px; border-radius: var(--radius-sm);
                      color: var(--muted); font-weight: 500; font: inherit; font-weight: 500; background: none; border: 0;
                      cursor: pointer; width: 100%; text-align: left; }
.nav a:hover, .nav button:hover { background: var(--hover); color: var(--text); text-decoration: none; }
.nav a.active { background: var(--primary-soft); color: var(--link); }
.nav .ti { font-size: 20px; }
.nav-label { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: 14px 10px 4px; }
.sidebar .bottom { margin-top: auto; border-top: 1px solid var(--border); padding-top: 10px; }
.sidebar .who { font-size: 13px; color: var(--muted); padding: 4px 10px 6px; }
.sidebar .who strong { color: var(--text); display: block; font-size: 14px; }
.shop-name { margin: -8px 8px 12px; display: flex; align-items: center; gap: 6px; }
/* ---------------------------------------------------------------- Master admin */
.sidebar.master { background: #111827; border-right-color: #1f2937; }
.sidebar.master .brand, .sidebar.master .who strong { color: #f9fafb; }
.sidebar.master .brand-mark { background: #f59e0b; color: #111827; }
.sidebar.master .nav a, .sidebar.master .nav button, .sidebar.master .who, .sidebar.master .nav-label,
.sidebar.master .lang-switch { color: #9ca3af; }
.sidebar.master .nav a:hover, .sidebar.master .nav button:hover { background: #1f2937; color: #f9fafb; }
.sidebar.master .nav a.active { background: #1f2937; color: #fbbf24; }
.sidebar.master .bottom { border-top-color: #1f2937; }
.sidebar.master .lang-switch button.active { background: #1f2937; color: #fbbf24; }
.master-area .page-head h1::before { content: "\2605  "; color: #f59e0b; }
.master-bar { position: sticky; top: 0; z-index: 31; display: flex; align-items: center; justify-content: space-between;
              gap: 12px; flex-wrap: wrap; padding: 9px 20px; background: #f59e0b; color: #111827; font-weight: 600; }
.master-bar a { color: #111827; text-decoration: underline; white-space: nowrap; }
.alert-list li { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.lang-switch { display: flex; align-items: center; gap: 4px; padding: 4px 10px; color: var(--muted); }
.lang-switch .ti { font-size: 18px; margin-right: 4px; }
.nav .lang-switch button { width: auto; padding: 4px 9px; border-radius: 999px; font-size: 13px; }
.nav .lang-switch button.active { background: var(--primary-soft); color: var(--link); }
.page { margin-left: var(--sidebar-w); min-height: 100vh; }
body.no-nav .page { margin-left: 0; padding-bottom: 0; }
main { max-width: 1240px; margin: 0 auto; padding: 28px 28px 60px; }
.topbar, .bottombar, .backdrop { display: none; }

/* ---------------------------------------------------------------- Κάρτες, κουμπιά, πίνακες */
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.page-head { display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; margin-bottom: 16px; }
.page-head h1 { margin: 0; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.facts { display: grid; gap: 12px 24px; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px;
        margin-bottom: 16px; box-shadow: var(--shadow); }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 38px; padding: 7px 14px;
       border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--card); color: var(--text);
       cursor: pointer; font: inherit; font-weight: 500; text-decoration: none; white-space: nowrap; }
.btn:hover { text-decoration: none; background: var(--hover); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--on-primary); }
.btn.primary:hover { background: var(--primary-dark); }
.btn.danger { color: var(--err); border-color: color-mix(in srgb, var(--err) 40%, transparent); }
.btn.ok { background: var(--ok-solid); border-color: var(--ok-solid); color: #fff; }
.btn.ok:hover { filter: brightness(.95); }
.btn.sm { min-height: 30px; padding: 3px 10px; font-size: 13px; }
.btn.block { width: 100%; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
tbody tr:last-child td { border-bottom: 0; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); font-weight: 600;
     background: var(--surface-2); }
tbody tr:hover td { background: color-mix(in srgb, var(--hover) 50%, transparent); }
td.num, th.num { text-align: right; white-space: nowrap; }
.table-wrap { overflow-x: auto; }
.card.table-wrap { padding: 0; }
.card.table-wrap > h2, .card.table-wrap > .row, .card.table-wrap > .pagination { padding: 14px 16px 0; }
.card.table-wrap > .pagination { padding-bottom: 14px; }
.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600;
         background: var(--hover); color: var(--muted); white-space: nowrap; }
.badge.reserved, .badge.pending { background: var(--info-bg); color: var(--info); }
.badge.out { background: var(--warn-bg); color: var(--warn); }
.badge.returned, .badge.available { background: var(--ok-bg); color: var(--ok); }
.badge.cancelled, .badge.retired { background: var(--hover); color: var(--muted); }
.badge.overdue, .badge.maintenance { background: var(--err-bg); color: var(--err); }
.messages { list-style: none; padding: 0; margin: 0 0 16px; }
.messages li { padding: 11px 14px; border-radius: var(--radius-sm); margin-bottom: 6px; font-weight: 500; }
.messages .success { background: var(--ok-bg); color: var(--ok); }
.messages .error { background: var(--err-bg); color: var(--err); }
.messages .warning { background: var(--warn-bg); color: var(--warn); }
.messages .info { background: var(--info-bg); color: var(--info); }

/* ---------------------------------------------------------------- Φόρμες */
form.stack p, form.stack .field { margin: 0 0 14px; }
form.stack label { display: block; font-weight: 600; margin-bottom: 5px; font-size: 14px; }
input[type=text], input[type=search], input[type=email], input[type=number], input[type=password],
input[type=datetime-local], input[type=date], select, textarea {
  width: 100%; min-height: 40px; padding: 8px 11px; border: 1px solid var(--input-border); border-radius: var(--radius-sm);
  font: inherit; background: var(--input-bg); color: var(--text); }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 20%, transparent); }
input[type=checkbox], input[type=radio] { accent-color: var(--primary); width: 18px; height: 18px; vertical-align: -3px; }
input[type=file] { font: inherit; max-width: 100%; }
.row input, .row select { width: auto; }
.helptext { display: block; color: var(--muted); font-size: 12px; margin-top: 3px; }
.errorlist { color: var(--err); list-style: none; padding: 0; margin: 4px 0; font-size: 13px; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 0 18px; }
.list-plain { list-style: none; padding: 0; margin: 0; }
.list-plain li { padding: 10px 0; border-bottom: 1px solid var(--border); }
.list-plain li:last-child { border-bottom: 0; }
.pagination { margin-top: 12px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* ---------------------------------------------------------------- Αρχική: αριθμοί */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat { display: block; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
        padding: 14px 16px; color: var(--text); box-shadow: var(--shadow); }
.stat:hover { text-decoration: none; border-color: var(--primary); }
.stat .label { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); }
.stat .value { font-size: 28px; font-weight: 700; letter-spacing: -.02em; margin-top: 2px; }
.stat.alert .value { color: var(--err); }
.quick-actions { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-bottom: 16px; }
.quick-actions .btn { min-height: 52px; font-size: 15px; }

/* ---------------------------------------------------------------- Σκανάρισμα */
.scan-box { border: 2px solid var(--primary); }
.scan-box.mode-in { border-color: var(--ok-solid); }
.mode-switch { display: inline-flex; border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.mode-switch a { padding: 9px 16px; color: var(--text); font-weight: 600; }
.mode-switch a:hover { text-decoration: none; background: var(--hover); }
.mode-switch a.active { background: var(--primary); color: #fff; }
.mode-switch a.active.in { background: var(--ok-solid); }
#scan-input { font-size: 18px; min-height: 48px; }
#scan-result { margin-top: 10px; padding: 12px 14px; border-radius: var(--radius-sm); display: none; font-weight: 600; }
#scan-result.success { display: block; background: var(--ok-bg); color: var(--ok); }
#scan-result.info { display: block; background: var(--info-bg); color: var(--info); }
#scan-result.warning { display: block; background: var(--warn-bg); color: var(--warn); }
#scan-result.error { display: block; background: var(--err-bg); color: var(--err); }
#camera { width: 100%; max-width: 420px; margin-top: 10px; border-radius: var(--radius-sm); overflow: hidden; }
tr.state-returned td { color: var(--muted); }
tr.state-out td:first-child { box-shadow: inset 3px 0 0 var(--warn); }
tr.state-returned td:first-child { box-shadow: inset 3px 0 0 var(--ok-solid); }
tr.state-pending td:first-child { box-shadow: inset 3px 0 0 var(--info); }
.conflict { color: var(--err); font-size: 12px; }
.totals td { border: 0; padding: 4px 12px; }
.totals tr:hover td { background: none; }
.totals tr.grand td { font-size: 18px; font-weight: 700; border-top: 2px solid var(--text); }
details.line-edit summary { cursor: pointer; color: var(--link); font-size: 13px; font-weight: 500; }
details.line-edit form { margin-top: 8px; display: grid; gap: 6px; grid-template-columns: 1fr 1fr; min-width: 260px; }
details.line-edit label { font-size: 12px; color: var(--muted); }
#search-results { margin-top: 8px; }
#search-results button { display: block; width: 100%; text-align: left; margin-bottom: 4px; white-space: normal; }
.thumb { width: 48px; height: 48px; object-fit: cover; border-radius: 6px; margin: 4px 4px 0 0; }

/* ---------------------------------------------------------------- Tablet & κινητό */
@media (max-width: 1023px) {
  .sidebar { transform: translateX(-100%); transition: transform .2s ease; width: min(84vw, 300px); box-shadow: none; }
  body.nav-open .sidebar { transform: none; box-shadow: 0 0 40px rgba(0, 0, 0, .25); }
  body.nav-open .backdrop { display: block; position: fixed; inset: 0; background: rgba(0, 0, 0, .35); z-index: 35; }
  .page { margin-left: 0; padding-bottom: calc(68px + env(safe-area-inset-bottom)); }
  .has-master-bar .topbar { top: 40px; }
  .master-area .page { padding-bottom: 0; }
  .topbar { display: flex; align-items: center; gap: 10px; position: sticky; top: 0; z-index: 30; height: 56px;
            padding: 0 12px; background: var(--card); border-bottom: 1px solid var(--border); }
  .topbar .brand { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--text); }
  .topbar .brand:hover { text-decoration: none; }
  .topbar .brand-mark { width: 28px; height: 28px; font-size: 16px; }
  .icon-btn { width: 40px; height: 40px; border-radius: var(--radius-sm); border: 0; background: none; color: var(--text);
              display: inline-flex; align-items: center; justify-content: center; cursor: pointer; font-size: 22px; }
  .icon-btn:hover { background: var(--hover); }
  .topbar .spacer { flex: 1; }
  .bottombar { display: grid; grid-template-columns: repeat(5, 1fr); position: fixed; left: 0; right: 0; bottom: 0; z-index: 30;
               background: var(--card); border-top: 1px solid var(--border); padding: 6px 4px calc(6px + env(safe-area-inset-bottom)); }
  .bottombar a, .bottombar button { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
               min-height: 52px; color: var(--muted); font: inherit; font-size: 11px; font-weight: 500; background: none;
               border: 0; cursor: pointer; border-radius: var(--radius-sm); }
  .bottombar a:hover { text-decoration: none; }
  .bottombar .ti { font-size: 24px; }
  .bottombar a.active { color: var(--link); }
  .bottombar a.main { color: #fff; background: var(--ok-solid); margin: 0 4px; }
  .bottombar a.main.active { color: #fff; }
  main { padding: 18px 16px 40px; }
  .stats, .quick-actions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  body { font-size: 15px; }
  main { padding: 14px 12px 32px; }
  h1 { font-size: 21px; }
  .hide-mobile { display: none; }
  .card { padding: 14px; border-radius: 10px; }
  .grid { grid-template-columns: minmax(0, 1fr); }
  /* 16px στα πεδία για να μη κάνει zoom το iPhone */
  input[type=text], input[type=search], input[type=email], input[type=number], input[type=password],
  input[type=datetime-local], input[type=date], select, textarea { font-size: 16px; min-height: 44px; }
  .btn { min-height: 44px; }
  .btn.sm { min-height: 34px; }
  .page-head .row { width: 100%; }
  .page-head .row .btn { flex: 1 1 auto; }
  .row > input[type=search], .row > input[type=text], .row > select { flex: 1 1 100%; width: 100%; }
  .stats { gap: 8px; }
  .stat { padding: 12px; }
  .stat .value { font-size: 24px; }
  .quick-actions .btn { min-height: 60px; flex-direction: column; gap: 2px; font-size: 14px; }
  .quick-actions .btn .ti { font-size: 24px; }
  /* Μεγάλα κουμπιά σκαναρίσματος */
  .scan-box .mode-switch { display: grid; grid-template-columns: 1fr 1fr; width: 100%; }
  .scan-box .mode-switch a { text-align: center; padding: 14px 8px; font-size: 16px; }
  .scan-box form.row > * { flex: 1 1 auto; }
  .scan-box #scan-input { flex: 1 1 100% !important; font-size: 20px; min-height: 56px; }
  .scan-box form.row .btn { min-height: 52px; font-size: 16px; }
  details.line-edit form { grid-template-columns: 1fr; min-width: 0; }
  .totals { max-width: none !important; }
  /* Πίνακες → κάρτες */
  table.cards thead { display: none; }
  table.cards, table.cards tbody, table.cards tr, table.cards td { display: block; width: 100%; }
  table.cards tr { border-bottom: 1px solid var(--border); padding: 10px 14px; }
  table.cards tbody tr:last-child { border-bottom: 0; }
  table.cards td { border: 0; padding: 2px 0; text-align: left; }
  table.cards td.num { text-align: left; }
  table.cards td[data-label]::before { content: attr(data-label) ": "; color: var(--muted); font-size: 13px; }
  table.cards td:first-child { font-size: 16px; font-weight: 600; }
  table.cards td:first-child[data-label]::before { content: none; }
  table.cards tr:hover td { background: none; }
  table.cards tr.state-out { box-shadow: inset 3px 0 0 var(--warn); }
  table.cards tr.state-returned { box-shadow: inset 3px 0 0 var(--ok-solid); }
  table.cards tr.state-pending { box-shadow: inset 3px 0 0 var(--info); }
  table.cards tr td:first-child { box-shadow: none; }
}

/* ---------------------------------------------------------------- Ημερολόγιο επιλογής ημερομηνίας */
.flatpickr-calendar { font-family: inherit; background: var(--card); border: 1px solid var(--border);
                      box-shadow: 0 8px 24px rgba(0, 0, 0, .12); }
.flatpickr-calendar.arrowTop::before, .flatpickr-calendar.arrowTop::after { border-bottom-color: var(--border); }
.flatpickr-months .flatpickr-month, .flatpickr-current-month .flatpickr-monthDropdown-months,
.flatpickr-current-month input.cur-year, span.flatpickr-weekday, .flatpickr-time input, .flatpickr-time .flatpickr-am-pm,
.flatpickr-time .flatpickr-time-separator { color: var(--text); fill: var(--text); background: transparent; }
.flatpickr-months .flatpickr-prev-month, .flatpickr-months .flatpickr-next-month { color: var(--text); fill: var(--text); }
.flatpickr-day { color: var(--text); }
.flatpickr-day:hover, .flatpickr-day:focus { background: var(--hover); border-color: var(--hover); }
.flatpickr-day.today { border-color: var(--primary); }
.flatpickr-day.selected, .flatpickr-day.selected:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
.flatpickr-day.prevMonthDay, .flatpickr-day.nextMonthDay, .flatpickr-day.flatpickr-disabled { color: var(--muted); opacity: .6; }
.flatpickr-time { border-top: 1px solid var(--border) !important; }
.flatpickr-time input:hover, .flatpickr-time input:focus { background: var(--hover); }
input.flatpickr-input[readonly] { cursor: pointer; }

/* ---------------------------------------------------------------- Εκτύπωση */
@media print {
  .sidebar, .topbar, .bottombar, .backdrop, .no-print, .messages { display: none !important; }
  body { background: #fff; color: #000; }
  .page { margin: 0; padding: 0; }
  main { padding: 0; max-width: none; }
  .card { box-shadow: none; }
}