/* Layout: μία στήλη ~760px, ημερολόγιο 7 στηλών, κάρτες σεμιναρίων σε πλέγμα. */
:root {
  --bg: #f4f6f7;
  --surface: #ffffff;
  --ink: #17232b;
  --muted: #5a6a73;
  --line: #d9e0e4;
  --accent: #0d6670;
  --accent-ink: #ffffff;
  --accent-soft: #e2f0f1;
  --pending: #a35a00;
  --pending-soft: #fbefdc;
  --ok: #1d7a3a;
  --ok-soft: #e1f3e6;
  --bad: #b3261e;
  --bad-soft: #fbe5e3;
  --display: "Literata", Georgia, "Times New Roman", serif;
  --body: "Commissioner", "Segoe UI", Roboto, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  --radius: 10px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1619; --surface: #172126; --ink: #e6edf0; --muted: #9aabb3; --line: #2a3a41;
    --accent: #4fb3bc; --accent-ink: #062327; --accent-soft: #15353a;
    --pending: #f0b35c; --pending-soft: #3a2a12; --ok: #6fd18d; --ok-soft: #12321d;
    --bad: #ff8a80; --bad-soft: #3d1714; color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.55 var(--body);
  padding: 0 16px;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.wrap { max-width: 780px; margin: 0 auto; padding-block: 32px 48px; display: grid; gap: 40px; }
h1, h2, h3 { font-family: var(--display); font-weight: 600; line-height: 1.2; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(1.9rem, 5vw, 2.6rem); }
h2 { font-size: 1.55rem; }
h3 { font-size: 1.15rem; }
p { margin: 0; max-width: 65ch; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.eyebrow { font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
.stack { display: grid; gap: 12px; }
.stack-lg { display: grid; gap: 20px; }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

/* Πάνω μέρος */
.top { display: grid; gap: 14px; padding-top: 8px; }
.top .rate {
  display: inline-flex; gap: 14px; flex-wrap: wrap; align-items: baseline;
  padding: 10px 14px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface);
  width: fit-content; max-width: 100%;
}
.top .rate b { font-size: 1.25rem; font-variant-numeric: tabular-nums; }
.tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.tab {
  text-decoration: none; color: var(--ink); padding: 8px 14px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); font-weight: 500;
}
.tab:hover { border-color: var(--accent); }

/* Τιμή */
.was { color: var(--muted); text-decoration-thickness: 2px; text-decoration-color: var(--bad); font-variant-numeric: tabular-nums; }

/* Πελάτης */
.client-bar { display: flex; flex-wrap: wrap; gap: 12px 18px; align-items: center; padding: 12px 14px; border: 1px solid var(--accent); border-radius: var(--radius); background: var(--accent-soft); }
.client-bar .rate { background: var(--surface); }
.client-login summary { cursor: pointer; color: var(--accent); font-weight: 600; width: fit-content; }
.client-login[open] { display: grid; gap: 10px; }
.client-login form { margin-top: 4px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Ημερολόγιο */
.cal { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 6px; }
.cal .wd { font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); text-align: center; font-weight: 600; }
.day {
  display: grid; gap: 2px; justify-items: center; align-content: center;
  min-height: 58px; border-radius: 8px; border: 1px solid transparent;
  font-variant-numeric: tabular-nums; text-decoration: none; color: var(--muted);
}
.day .n { font-size: 1.05rem; font-weight: 600; }
.day .m { font-size: .68rem; }
.day.off { opacity: .45; }
.day.open { background: var(--surface); border-color: var(--line); color: var(--ink); }
.day.open .m { color: var(--accent); font-weight: 600; }
.day.open:hover { border-color: var(--accent); }
.day.sel { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.day.sel .m { color: var(--accent-ink); }
.day.blank { visibility: hidden; }
.slots { display: flex; flex-wrap: wrap; gap: 8px; }
.slot {
  font-family: var(--mono); font-variant-numeric: tabular-nums; text-decoration: none;
  padding: 10px 14px; border-radius: 8px; border: 1px solid var(--accent); color: var(--accent); background: var(--surface);
}
.slot:hover { background: var(--accent); color: var(--accent-ink); }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; display: grid; gap: 14px; min-width: 0; }

/* Σεμινάρια */
.sems { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }
.sem { display: grid; grid-template-rows: auto auto 1fr auto; gap: 10px; }
.sem .when { font-family: var(--mono); font-size: .85rem; color: var(--accent); }
.sem .meta { display: flex; justify-content: space-between; gap: 10px; align-items: center; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 10px; }
.seats { font-size: .8rem; padding: 2px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.seats.full { background: var(--bad-soft); color: var(--bad); }

/* Κουμπιά & φόρμες */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; cursor: pointer;
  font: 600 1rem var(--body); text-decoration: none; padding: 12px 18px; border-radius: 8px;
  background: var(--accent); color: var(--accent-ink); border: 1px solid var(--accent);
}
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.small { padding: 6px 10px; font-size: .85rem; }
.btn.danger { background: transparent; color: var(--bad); border-color: var(--bad); }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
label { display: grid; gap: 6px; font-weight: 500; }
label .hint { font-weight: 400; font-size: .85rem; color: var(--muted); }
input, select, textarea {
  font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line);
  border-radius: 8px; padding: 10px 12px; width: 100%;
}
textarea { min-height: 90px; resize: vertical; }
.choice { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; }
.choice input { width: auto; margin-top: 4px; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }

/* Σύνοψη / πληρωμή */
.summary { display: grid; gap: 6px; }
.summary div { display: flex; justify-content: space-between; gap: 12px; border-bottom: 1px dashed var(--line); padding-bottom: 6px; }
.summary div span:first-child { color: var(--muted); }
.summary div span:last-child { text-align: right; }
.total { font-size: 1.4rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.code-box {
  font-family: var(--mono); font-size: 1.4rem; letter-spacing: .06em; padding: 10px 16px;
  border: 2px dashed var(--accent); border-radius: 8px; width: fit-content; user-select: all;
}
.note { padding: 12px 14px; border-radius: 8px; background: var(--accent-soft); }
.note.warn { background: var(--pending-soft); color: var(--ink); }
.note.err { background: var(--bad-soft); color: var(--bad); }
.note.ok { background: var(--ok-soft); color: var(--ink); }
.steps { margin: 0; padding-left: 20px; display: grid; gap: 6px; }

/* IRIS */
.iris { gap: 10px; }
.iris-row { display: grid; grid-template-columns: 110px 1fr auto; gap: 10px; align-items: center; }
.iris-row .code-box { font-size: 1.15rem; padding: 6px 12px; }
@media (max-width: 480px) { .iris-row { grid-template-columns: 1fr auto; } .iris-row > .muted { grid-column: 1 / -1; } }

/* Καταστάσεις */
.pill { font-size: .75rem; font-weight: 600; padding: 2px 9px; border-radius: 999px; white-space: nowrap; }
.pill.pending { background: var(--pending-soft); color: var(--pending); }
.pill.paid { background: var(--ok-soft); color: var(--ok); }
.pill.cancelled, .pill.expired { background: var(--bad-soft); color: var(--bad); }

/* Διαχείριση */
.admin .wrap { max-width: 1000px; }
.adminbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .92rem; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
td.num { font-variant-numeric: tabular-nums; white-space: nowrap; }
.weekly { display: grid; gap: 8px; }
.weekly label { grid-template-columns: 110px 1fr; align-items: center; }
@media (max-width: 480px) { .weekly label { grid-template-columns: 1fr; } }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.kpi { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; }
.kpi b { display: block; font-size: 1.4rem; font-variant-numeric: tabular-nums; }

.foot { max-width: 780px; margin: 0 auto; padding-block: 18px 32px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: var(--muted); font-size: .85rem; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }