/* The scheduler's only stylesheet (FEATURES.md F22). Phone first: the
   layout widens at 900px. Colours, type and spacing are the tokens below. */

@font-face {
  font-family: "Commissioner";
  src: url("fonts/commissioner-greek.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
  unicode-range: U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF;
}
@font-face {
  font-family: "Commissioner";
  src: url("fonts/commissioner-latin.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
                 U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --ground: #F5F6F8;
  --card: #FFFFFF;
  --ink: #1B2230;
  --ink-2: #3A4352;
  --muted: #5B6474;
  --line: #E3E6EB;
  --line-soft: #EEF0F3;
  --field-line: #D5D9E0;
  --hover: #ECEEF2;
  --accent: #1E4F91;
  --accent-dark: #163B6D;
  --accent-soft: #E8EFF9;
  --ok: #1A6B43;       --ok-soft: #E6F4EC;
  --warn: #8A4A0B;     --warn-soft: #FDF0DC;
  --bad: #A3271D;      --bad-soft: #FDECEA;
  --neutral: #4A5262;  --neutral-soft: #EEF0F3;
  --radius: 8px;
  --radius-card: 12px;
  --touch: 44px;
  --gap: 16px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--ground); color: var(--ink);
  font-family: "Commissioner", system-ui, sans-serif; font-size: 16px; line-height: 1.5;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); text-decoration: underline; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
h1 { margin: 0; font-size: 24px; font-weight: 700; letter-spacing: -0.01em; }
h2 { margin: 0; font-size: 17px; font-weight: 700; }
h3 { margin: 0; font-size: 15px; font-weight: 700; }
p { margin: 0; }
.muted { color: var(--muted); }
.num { font-variant-numeric: tabular-nums; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* --- layout ----------------------------------------------------------- */

.app { min-height: 100vh; display: flex; flex-direction: column; }
.topbar {
  background: var(--card); border-bottom: 1px solid var(--line); padding: 8px 8px 8px 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.brand { display: flex; flex-direction: column; color: var(--ink); }
.brand strong { font-size: 17px; }
.brand small { font-size: 12px; color: var(--muted); }
.brand:hover { text-decoration: none; color: var(--ink); }
.topbar nav a:not(.btn) { display: inline-flex; align-items: center; min-height: var(--touch); padding: 0 8px; }
.menu-button {
  width: var(--touch); height: var(--touch); border: 0; background: transparent; color: var(--ink);
  display: inline-flex; align-items: center; justify-content: center; cursor: pointer; border-radius: var(--radius);
}
.sidenav { background: var(--card); border-bottom: 1px solid var(--line); padding: 8px 16px 16px; }
.sidenav[hidden] { display: none; }
.sidenav .brand { display: none; }
.nav { display: flex; flex-direction: column; gap: 2px; margin: 0; padding: 0; list-style: none; }
.nav a {
  display: flex; align-items: center; min-height: var(--touch); padding: 0 12px; border-radius: var(--radius);
  color: var(--ink-2); font-weight: 500;
}
.nav a:hover { background: var(--hover); color: var(--ink); text-decoration: none; }
.nav a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); }
.nav-group { margin-top: 12px; padding: 0 12px; font-size: 12px; font-weight: 600; letter-spacing: .04em;
  text-transform: uppercase; color: var(--muted); }
.account { margin-top: 16px; padding: 12px; border-top: 1px solid var(--line-soft); font-size: 14px; color: var(--muted); }
.account strong { display: block; color: var(--ink); }
.main { flex: 1; min-width: 0; padding: 20px 16px 32px; display: flex; flex-direction: column; gap: 20px; }

@media (min-width: 900px) {
  .app.admin { flex-direction: row; align-items: stretch; }
  .app.admin > .topbar { display: none; }
  .sidenav, .sidenav[hidden] {
    display: flex; flex-direction: column; flex: 0 0 260px; border-bottom: 0; border-right: 1px solid var(--line);
    padding: 24px 16px; position: sticky; top: 0; height: 100vh; overflow-y: auto;
  }
  .sidenav .brand { display: flex; padding: 0 12px 20px; }
  .sidenav .brand strong { font-size: 20px; }
  .account { margin-top: auto; }
  .main { padding: 32px 40px; gap: 24px; max-width: 1240px; }
  .public .main { margin: 0 auto; width: 100%; max-width: 880px; }
  h1 { font-size: 28px; }
}

.page-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 16px; }
.page-head > div:first-child { display: flex; flex-direction: column; gap: 4px; }
.crumbs { font-size: 14px; color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.columns { display: flex; flex-wrap: wrap; gap: 24px; align-items: flex-start; }
.columns > * { flex: 1 1 320px; min-width: 0; display: flex; flex-direction: column; gap: 24px; }
.columns > .wide { flex: 2 1 520px; }

/* --- cards, tiles, definitions --------------------------------------- */

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card);
  padding: 20px; display: flex; flex-direction: column; gap: 16px; min-width: 0;
}
.card.flush { padding: 0; gap: 0; }
.card-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--gap); }
.tile { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 16px 20px;
  display: flex; flex-direction: column; gap: 4px; color: var(--ink); }
a.tile:hover { text-decoration: none; border-color: var(--accent); }
.tile .label { font-size: 14px; color: var(--muted); font-weight: 500; }
.tile .value { font-size: 28px; font-weight: 700; font-variant-numeric: tabular-nums; }
.tile .note { font-size: 13px; color: var(--muted); }
dl.facts { margin: 0; display: grid; grid-template-columns: minmax(0, 150px) minmax(0, 1fr); gap: 10px 16px; font-size: 15px; }
dl.facts dt { color: var(--muted); font-weight: 500; }
dl.facts dd { margin: 0; overflow-wrap: anywhere; }
.prose { overflow-wrap: anywhere; }
.prose img { max-width: 100%; }
.prose > * + * { margin-top: .75em; }
.prose ul, .prose ol { margin-bottom: 0; padding-left: 1.4em; }
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.stats .value { font-size: 24px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stats .muted { font-size: 13px; overflow-wrap: anywhere; hyphens: auto; }
.bar { height: 8px; background: var(--line-soft); border-radius: 999px; overflow: hidden; min-width: 60px; }
.bar > span { display: block; height: 100%; background: var(--accent); border-radius: 999px; }
.history { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 10px; font-size: 14px; }

/* --- buttons, chips, messages ------------------------------------------ */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: var(--touch);
  padding: 0 16px; border-radius: var(--radius); border: 1px solid var(--field-line); background: var(--card);
  color: var(--ink); font: inherit; font-weight: 600; font-size: 15px; cursor: pointer; text-decoration: none;
}
.btn:hover { background: var(--hover); color: var(--ink); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #FFFFFF; }
.btn.primary:hover { background: var(--accent-dark); }
.btn.danger { color: var(--bad); border-color: #E5B4AE; }
.btn.danger:hover { background: var(--bad-soft); }
.btn.small { min-height: 36px; padding: 0 12px; font-size: 14px; }
.btn.link { border: 0; background: transparent; color: var(--accent); padding: 0; min-height: 0; font-weight: 500; }
.btn.link:hover { text-decoration: underline; background: transparent; }
form.inline { display: inline; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 2px 10px; border-radius: 999px;
  font-size: 13px; font-weight: 600; white-space: nowrap; background: var(--neutral-soft); color: var(--neutral); }
.chip.ok { background: var(--ok-soft); color: var(--ok); }
.chip.info { background: var(--accent-soft); color: var(--accent); }
.chip.warn { background: var(--warn-soft); color: var(--warn); }
.chip.bad { background: var(--bad-soft); color: var(--bad); }
.messages { display: flex; flex-direction: column; gap: 8px; }
.message { padding: 12px 16px; border-radius: var(--radius); border: 1px solid; font-size: 15px; }
.message.success { background: var(--ok-soft); border-color: #B9DFC9; color: var(--ok); }
.message.error { background: var(--bad-soft); border-color: #F1C1BC; color: var(--bad); }
.message.info, .message.warning { background: var(--warn-soft); border-color: #F3D3A1; color: var(--warn); }

/* --- forms -------------------------------------------------------------- */

.form { display: flex; flex-direction: column; gap: 16px; max-width: 640px; }
.field { display: flex; flex-direction: column; gap: 6px; font-size: 14px; color: var(--muted); font-weight: 500; }
.field label { color: var(--ink-2); font-weight: 600; }
.field .help { font-size: 13px; }
.field .error { color: var(--bad); font-size: 14px; }
.field.has-error input, .field.has-error select, .field.has-error textarea { border-color: var(--bad); }
.check { display: flex; align-items: center; gap: 10px; min-height: var(--touch); color: var(--ink); font-weight: 500; }
.check input { width: 22px; height: 22px; }
input, select, textarea {
  font: inherit; font-size: 16px; color: var(--ink); background: var(--card);
  border: 1px solid var(--field-line); border-radius: var(--radius); width: 100%;
}
input:not([type=checkbox]):not([type=radio]):not([type=file]), select { min-height: var(--touch); padding: 0 12px; }
textarea { padding: 10px 12px; min-height: 120px; }
select[multiple] { min-height: 180px; padding: 6px; }
input[type=file] { padding: 10px 0; border: 0; background: transparent; }
.errors { padding: 12px 16px; border-radius: var(--radius); background: var(--bad-soft); color: var(--bad); }
.filters { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 12px; padding: 16px; }
.filters .field { flex: 1 1 200px; }
.seg { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 2px; }
.seg a {
  flex: 0 0 auto; display: inline-flex; align-items: center; min-height: var(--touch); padding: 0 14px;
  border-radius: 999px; border: 1px solid var(--field-line); background: var(--card); color: var(--ink-2);
  font-size: 14px; font-weight: 600; white-space: nowrap;
}
.seg a:hover { text-decoration: none; background: var(--hover); }
.seg a[aria-current="true"] { background: var(--accent); border-color: var(--accent); color: #FFFFFF; }

/* --- tables, which become cards on a phone ------------------------------- */

table { width: 100%; border-collapse: collapse; font-size: 15px; }
th { text-align: left; font-size: 12px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase;
  color: var(--muted); padding: 10px 16px; border-bottom: 1px solid var(--line); white-space: nowrap; }
td { padding: 12px 16px; border-bottom: 1px solid var(--line-soft); vertical-align: middle; }
tr.inactive td { color: var(--muted); }
td.end, th.end { text-align: right; }
.empty { padding: 20px; color: var(--muted); }
.scroll { overflow-x: auto; }

@media (max-width: 899px) {
  table.cards, table.cards tbody, table.cards tr, table.cards td { display: block; }
  table.cards thead { display: none; }
  table.cards tr { padding: 12px 16px; border-bottom: 1px solid var(--line); }
  table.cards td { border: 0; padding: 2px 0; }
  table.cards td[data-label]::before { content: attr(data-label) " · "; color: var(--muted); font-size: 14px; }
  table.cards td.end { text-align: left; padding-top: 8px; }
  table.cards td.title { font-size: 17px; }
}

/* --- confirmation dialog -------------------------------------------------- */

dialog { border: 0; border-radius: var(--radius-card); padding: 24px; max-width: min(420px, calc(100vw - 32px));
  box-shadow: 0 12px 40px rgba(27, 34, 48, .25); color: var(--ink); }
dialog::backdrop { background: rgba(27, 34, 48, .4); }
dialog p { margin-bottom: 20px; }
dialog .actions { justify-content: flex-end; }

/* --- the doctorals' availability (F22, Rule 4): day cards, slot toggles -- */

fieldset { margin: 0; padding: 0; border: 0; min-width: 0; }
legend { padding: 0; font-weight: 700; margin-bottom: 8px; }
.days { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.day-card { display: flex; flex-direction: column; gap: 8px; }
.slot {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 52px; padding: 0 14px;
  border-radius: 10px; border: 1px solid var(--field-line); background: var(--card); cursor: pointer;
}
.slot input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.slot .state::after { content: "Μη διαθέσιμη"; font-weight: 600; color: var(--muted); }
.slot:has(input:checked) { background: var(--accent); border-color: var(--accent); color: #FFFFFF; }
.slot:has(input:checked) .state::after { content: "✓ Διαθέσιμη"; color: #FFFFFF; }
.slot:has(input:focus-visible) { outline: 3px solid var(--accent); outline-offset: 2px; }
.slot.none { background: transparent; border-style: dashed; color: #6B7382; cursor: default; font-size: 14px; }
.options { display: flex; flex-direction: column; gap: 8px; }
.opt { display: flex; align-items: center; gap: 12px; min-height: 48px; padding: 0 14px; border: 1px solid var(--field-line);
  border-radius: 10px; background: var(--card); cursor: pointer; }
.opt input { width: 20px; height: 20px; accent-color: var(--accent); }
.opt:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-dark); font-weight: 600; }
.availability { display: flex; flex-direction: column; gap: 20px; }
.btn.big { min-height: 52px; font-size: 17px; }
@media (max-width: 899px) { .btn.big { width: 100%; } }

/* --- the period grids: timetable, assigner, availability ----------------
   Days are rows and slots columns; on a phone each day is a card with its
   slots stacked, each labelled with its time. */

.grid { display: flex; flex-direction: column; gap: 12px; }
.grid-head { display: none; }
.grid-row { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 12px;
  display: flex; flex-direction: column; gap: 10px; scroll-margin-top: 16px; }
.grid-day strong { display: block; }
.grid-cell { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.grid-cell::before { content: attr(data-hour); font-size: 13px; font-weight: 600; color: var(--muted); }
.grid-cell:empty::after, .grid-cell.empty::after { content: "—"; color: #8A919E; }
@media (min-width: 900px) {
  .grid { gap: 0; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-card); overflow-x: auto; }
  .grid-head, .grid-row { display: grid; grid-template-columns: 130px repeat(var(--slots), minmax(170px, 1fr));
    min-width: calc(130px + var(--slots) * 170px); }
  .grid-head { font-size: 12px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--muted);
    border-bottom: 1px solid var(--line); }
  .grid-head > div { padding: 10px 12px; }
  .grid-row { border: 0; border-bottom: 1px solid var(--line-soft); border-radius: 0; padding: 0; gap: 0; }
  .grid-row > * { padding: 10px 12px; }
  .grid-cell { border-left: 1px solid var(--line-soft); }
  .grid-cell::before { display: none; }
}
.exam { border: 1px solid var(--line); border-radius: 10px; padding: 10px; display: flex; flex-direction: column; gap: 8px;
  background: var(--card); font-size: 14px; }
.exam.short { border-color: #E8A4A0; background: #FFF7F6; }
.exam.selected { outline: 3px solid var(--accent); outline-offset: 1px; }
.exam-head { display: flex; justify-content: space-between; gap: 8px; }
.people { display: flex; flex-wrap: wrap; gap: 4px; }
.person { display: inline-flex; align-items: center; gap: 4px; min-height: 28px; padding: 0 8px; border-radius: 6px;
  background: var(--accent-soft); color: var(--accent-dark); font-size: 13px; font-weight: 500; }
.person.over { background: var(--warn-soft); color: var(--warn); }
.count { font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; }
.count.zero { color: #8A919E; font-weight: 500; }
.split { display: flex; flex-wrap: wrap; gap: 20px; align-items: flex-start; }
.split > .main-col { flex: 3 1 600px; min-width: 0; }
.split > .side-col { flex: 1 1 300px; min-width: 0; position: sticky; top: 16px; }

/* --- the Markdown editor: text and its preview, side by side when wide -- */

code { font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; font-size: .9em;
  background: var(--line-soft); padding: 1px 4px; border-radius: 4px; }
.markdown-editor { display: grid; gap: 8px; }
.markdown-preview { border: 1px dashed var(--field-line); border-radius: var(--radius); padding: 12px 16px; min-height: 120px;
  background: var(--ground); color: var(--ink); font-size: 15px; font-weight: 400; }
.markdown-preview::before { content: "Προεπισκόπηση"; display: block; font-size: 12px; font-weight: 600; letter-spacing: .04em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
@media (min-width: 1100px) {
  .form:has(.markdown-editor) { max-width: none; }
  .markdown-editor { grid-template-columns: 1fr 1fr; align-items: start; }
  .markdown-editor .help { grid-column: 1 / -1; grid-row: 2; }
  .markdown-editor textarea { min-height: 320px; }
}
.badge { background: #B45309; color: #FFFFFF; font-size: 12px; font-weight: 700; border-radius: 999px; padding: 0 8px; }
.person.proposed { background: var(--card); border: 1px dashed var(--accent); }

@media print {
  .topbar, .sidenav, .no-print, .messages { display: none !important; }
  body { background: #FFFFFF; }
  .card { border: 0; padding: 0; }
}
.slot.leave { background: var(--line-soft); border-style: solid; border-color: var(--line-soft); }