/* Korepetitoriai app — same tokens as the landing page (assets/css/styles.css) */
:root {
  --ink: #121417;
  --paper: #FAFAF8;
  --white: #FFFFFF;
  --muted: #56585D;
  --line: rgba(18, 20, 23, .12);
  --line-strong: rgba(18, 20, 23, .28);
  --pen: #2456D3;
  --accent: #D62C2B;
  --accent-soft: #FBE9E8;
  --done: #1E7A4C;
  --done-soft: #E5F2EA;
  --font-sans: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --radius: 0;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-underline-offset: 3px; }
a:hover { color: var(--accent); }
h1, h2, h3 { margin: 0; font-stretch: 110%; letter-spacing: -.02em; line-height: 1.1; }
h1 { font-size: clamp(30px, 4vw, 44px); font-weight: 800; letter-spacing: -.035em; }
h2 { font-size: 20px; font-weight: 700; }
h3 { font-size: 17px; font-weight: 700; }
p { margin: 0; }
code { font-size: .92em; }
:focus-visible { outline: 2px solid var(--pen); outline-offset: 2px; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.muted { color: var(--muted); }
.small { font-size: 14px; }
.dot { color: var(--accent); }
.eyebrow { margin-bottom: 6px; font-size: 12px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }

/* --- Buttons & form controls ------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--paper);
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}
.btn:hover { color: var(--paper); background: #2a2d33; }
.btn--sm { min-height: 36px; padding: 0 12px; font-size: 14px; }
.btn--lg { min-height: 54px; padding: 0 24px; font-size: 16px; }
.btn--block { width: 100%; }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }
.btn--accent { border-color: var(--accent); background: var(--accent); color: var(--white); }
.btn--accent:hover { border-color: #b82221; background: #b82221; color: var(--white); }
.btn--light { border-color: var(--white); background: var(--white); color: var(--ink); }
.btn--light:hover { background: var(--paper); color: var(--ink); }

.linkbtn {
  padding: 0;
  border: 0;
  background: none;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}
.linkbtn:hover { color: var(--ink); }
.linkbtn--danger:hover { color: var(--accent); }

.fld {
  display: block;
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--ink);
  font: inherit;
  font-size: 16px;
}
.fld:focus { border-color: var(--ink); outline: none; box-shadow: 0 0 0 1px var(--ink); }
textarea.fld { resize: vertical; }
.fld--sm { width: auto; min-height: 36px; padding: 4px 8px; font-size: 14px; }
.fld--file { padding: 9px 10px; }

.stack { display: flex; flex-direction: column; gap: 18px; }
.row { display: flex; flex-wrap: wrap; gap: 16px; }
.row > .field { flex: 1 1 140px; }
.row > .field--grow { flex: 3 1 260px; }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; margin: 0; padding: 0; border: 0; }
.field--narrow { max-width: 240px; }
.field__label { font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; }
.checks { display: flex; flex-wrap: wrap; gap: 8px; }
.check { display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; border: 1px solid var(--line-strong); background: var(--white); cursor: pointer; }
.check:has(input:checked) { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.check input { width: 18px; height: 18px; margin: 0; accent-color: var(--ink); }
.form-actions { display: flex; align-items: center; gap: 20px; margin-top: 6px; }
.errors { margin-bottom: 18px; padding: 12px 14px; border-left: 3px solid var(--accent); background: var(--accent-soft); }
.errors p + p { margin-top: 4px; }

/* --- Layout ------------------------------------------------------------ */

.topbar { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid var(--line); background: var(--paper); }
.topbar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 32px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 12px 20px;
}
.brand { font-size: 24px; font-weight: 800; font-stretch: 118%; line-height: 1; letter-spacing: -.045em; text-decoration: none; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand--lg { font-size: 40px; }
.mainnav { display: flex; gap: 4px; font-size: 15px; font-weight: 500; }
.mainnav a { padding: 8px 10px; text-decoration: none; white-space: nowrap; }
.mainnav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--accent); }
.who { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.who__text { display: flex; flex-direction: column; line-height: 1.2; }
.who__name { font-size: 14px; font-weight: 600; }
.who__role { font-size: 12px; color: var(--muted); }

@media (max-width: 820px) {
  .topbar__inner { padding: 10px 16px; }
  .mainnav { order: 3; width: calc(100% + 12px); margin: 0 -6px; overflow-x: auto; scrollbar-width: none; font-size: 14px; }
  .mainnav a { padding: 8px 6px; }
  .who__text { display: none; }
}

.page { max-width: 1180px; margin: 0 auto; padding: 32px 20px 80px; }
@media (max-width: 820px) { .page { padding: 24px 16px 64px; } }

.page-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 16px 24px; margin-bottom: 28px; }
.page-head__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.crumbs { margin-bottom: 12px; font-size: 14px; }
.crumbs a { color: var(--muted); text-decoration: none; }

.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(420px, 100%), 1fr)); gap: 20px; }
.grid-2 + .card, .card + .card, .grid-2 + .grid-2, .card + .grid-2 { margin-top: 20px; }

.card { min-width: 0; padding: 22px; border: 1px solid var(--line); background: var(--white); }
@media (max-width: 600px) { .card { padding: 18px 16px; } }
.card__head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 6px 16px; margin-bottom: 14px; }
.card__head a { font-size: 14px; color: var(--muted); text-decoration: none; }
.card__head a:hover { color: var(--accent); }
.form-card { max-width: 720px; }
.count { display: inline-block; min-width: 24px; margin-left: 6px; padding: 0 7px; border-radius: 999px; background: var(--ink); color: var(--paper); font-size: 13px; line-height: 22px; text-align: center; vertical-align: 2px; }
.empty { padding: 18px 0; color: var(--muted); }

.flashes { margin-bottom: 20px; }
.flash { padding: 10px 14px; border-left: 3px solid var(--done); background: var(--done-soft); }
.flash + .flash { margin-top: 8px; }

.badge { display: inline-flex; align-items: center; gap: 6px; padding: 2px 8px; border: 1px solid var(--line-strong); font-size: 12px; font-weight: 600; letter-spacing: .04em; white-space: nowrap; }
.badge--live { border-color: var(--accent); background: var(--accent); color: var(--white); }
.badge--live::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; animation: pulse 1.4s ease-in-out infinite; }
.badge--late { border-color: var(--accent); color: var(--accent); }
.badge--done { border-color: var(--done); color: var(--done); }
@keyframes pulse { 50% { opacity: .25; } }
.tag { font-size: 12px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }

.avatar { display: inline-flex; flex: none; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 50%; background: var(--ink); color: var(--paper); font-size: 15px; font-weight: 700; letter-spacing: .02em; }
.avatar--sm { width: 32px; height: 32px; font-size: 12px; }
.avatar--lg { width: 64px; height: 64px; font-size: 22px; }

/* --- Lessons ----------------------------------------------------------- */

.lessons, .people, .hw-list { margin: 0; padding: 0; list-style: none; }
.lesson { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; padding: 14px 0; border-top: 1px solid var(--line); }
.lesson:first-child { border-top: 0; }
.lesson__when { display: flex; flex-direction: column; min-width: 118px; }
.lesson__date { font-size: 13px; color: var(--muted); }
.lesson__time { font-weight: 700; font-variant-numeric: tabular-nums; }
.lesson__body { flex: 1 1 200px; min-width: 0; }
.lesson__title { font-weight: 600; }
.lesson__topic { font-weight: 400; color: var(--muted); }
.lesson__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.lesson--cancelled .lesson__time, .lesson--cancelled .lesson__title { color: var(--muted); text-decoration: line-through; }
.lesson--live { margin: 0 -10px; padding-right: 10px; padding-left: 10px; background: var(--accent-soft); }

.day + .day { margin-top: 28px; }
.day__title { margin-bottom: 4px; padding-bottom: 8px; border-bottom: 1px solid var(--ink); font-size: 15px; letter-spacing: .02em; }
.day .lessons { padding: 0 4px; }
.past { margin-top: 36px; }
.past summary { padding: 10px 0; font-weight: 600; cursor: pointer; }

.live-card, .next-lesson {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px 32px;
  margin-bottom: 20px;
  padding: 26px 28px;
  background: var(--accent);
  color: var(--white);
}
.live-card .badge--live { border-color: var(--white); background: var(--white); color: var(--accent); }
.live-card__title, .next-lesson__title { margin: 10px 0 4px; font-size: clamp(24px, 3vw, 34px); font-weight: 800; }
.next-lesson { background: var(--ink); }
.next-lesson .eyebrow { color: rgba(250, 250, 248, .7); }
.next-lesson--live { background: var(--accent); }
.next-lesson--live .eyebrow { color: var(--white); }
.next-lesson__hint { max-width: 280px; color: rgba(250, 250, 248, .75); font-size: 14px; }

.live-banner { position: sticky; top: 0; z-index: 9; display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px 16px; padding: 10px 16px; background: var(--accent); color: var(--white); font-weight: 600; }
.live-banner a:not(.btn) { color: var(--white); }

/* --- People ------------------------------------------------------------ */

.person { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; padding: 14px 0; border-top: 1px solid var(--line); }
.person:first-child { border-top: 0; }
.person--head { padding: 0; border: 0; }
.person__body { flex: 1 1 220px; min-width: 0; }
.person__name { font-weight: 700; text-decoration: none; }
.person__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.call-now { display: flex; align-items: center; gap: 6px; }

/* --- Homework ---------------------------------------------------------- */

.hw { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: 12px 24px; padding: 16px 0; border-top: 1px solid var(--line); }
.hw:first-child { border-top: 0; }
.hw__main { flex: 1 1 260px; min-width: 0; }
.hw__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; margin-bottom: 6px; }
.hw__title { margin-bottom: 4px; }
.hw__desc { margin-bottom: 6px; white-space: pre-line; }
.hw--done .hw__title { color: var(--muted); }
.hw__actions { flex: 0 1 auto; }
.note { margin-top: 8px; padding: 8px 12px; border-left: 3px solid var(--pen); background: #EEF2FC; font-size: 14px; }
.note__label { font-weight: 600; }

.done-form summary { list-style: none; }
.done-form summary::-webkit-details-marker { display: none; }
.done-form[open] summary { display: none; }
.done-form form { display: flex; flex-direction: column; gap: 8px; width: min(320px, 80vw); }

/* --- Materials --------------------------------------------------------- */

.materials { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr)); gap: 16px; }
.material { display: flex; flex-direction: column; gap: 8px; min-width: 0; padding: 18px; border: 1px solid var(--line); background: var(--white); }
.material__title { font-size: 18px; }
.material__body { max-height: 240px; overflow: auto; font-size: 15px; white-space: pre-wrap; overflow-wrap: anywhere; }
.material__links { display: flex; flex-wrap: wrap; gap: 8px; }
.material__links .btn { max-width: 100%; overflow: hidden; text-overflow: ellipsis; }
.material__foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; margin-top: auto; padding-top: 8px; border-top: 1px solid var(--line); }

/* --- Auth & errors ----------------------------------------------------- */

.auth .page { display: flex; justify-content: center; padding-top: 56px; }
.auth__wrap { display: flex; flex-direction: column; align-items: flex-start; gap: 20px; width: min(440px, 100%); }
.auth__card { width: 100%; }
.auth__card h1 { margin-bottom: 20px; font-size: 30px; }
.demo { width: 100%; border-style: dashed; }
.demo h2 { margin-bottom: 6px; font-size: 16px; }
.demo__list { margin: 14px 0 0; padding: 0; list-style: none; }
.demo__list li { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); }
.error-card { max-width: 560px; }
.error-card h1 { margin-bottom: 14px; }
.error-card p + p { margin-top: 16px; }

@media (prefers-reduced-motion: reduce) { .badge--live::before { animation: none; } }

/* --- Admin ------------------------------------------------------------- */

.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; margin-bottom: 20px; }
.tile { display: flex; flex-direction: column; gap: 2px; padding: 16px 18px; border: 1px solid var(--line); background: var(--white); color: inherit; text-decoration: none; }
a.tile:hover { border-color: var(--ink); }
.tile__num { font-size: 28px; font-weight: 700; line-height: 1.15; font-variant-numeric: tabular-nums; }
.tile__label { font-size: 13px; color: var(--muted); }
.tile--warn { border-color: var(--accent); }
.tile--warn .tile__num { color: var(--accent); }

.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 15px; }
.table th { padding: 8px 10px; border-bottom: 1px solid var(--line-strong); font-size: 12px; font-weight: 600; letter-spacing: .06em; text-align: left; text-transform: uppercase; color: var(--muted); white-space: nowrap; }
.table td { padding: 10px; border-top: 1px solid var(--line); vertical-align: top; }
.table tbody tr:first-child td { border-top: 0; }
.table th:first-child, .table td:first-child { padding-left: 0; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.table tr.is-off td { color: var(--muted); }
.table a { color: inherit; }
.nowrap { white-space: nowrap; }

.filters { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 12px; margin-bottom: 16px; }
.filters .fld--sm { min-width: 220px; }
.tabs { display: inline-flex; flex-wrap: wrap; border: 1px solid var(--line-strong); background: var(--white); }
.tabs a { padding: 6px 12px; font-size: 14px; color: inherit; text-decoration: none; }
.tabs a + a { border-left: 1px solid var(--line-strong); }
.tabs a[aria-current] { background: var(--ink); color: var(--paper); }

.facts { display: grid; gap: 10px; margin: 0; }
.facts > div { display: grid; grid-template-columns: minmax(140px, 1fr) 2fr; gap: 12px; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; }
.facts--inline > div { grid-template-columns: 110px 1fr; }

.secret { margin-bottom: 20px; padding: 16px 18px; border-left: 3px solid var(--done); background: var(--done-soft); }
.secret p { margin: 0 0 10px; }
.secret code { padding: 2px 6px; background: var(--white); font-size: 16px; user-select: all; }

.inline-form { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 12px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line); }
.inline-form .field { flex: 1 1 200px; }
.enroll-fields { margin: 0; padding: 16px; border: 1px solid var(--line); }
.enroll-fields[hidden] { display: none; }

.danger-zone__row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; padding: 12px 0; border-top: 1px solid var(--line); }
.danger-zone__row:first-of-type { border-top: 0; }
.danger-zone__row p { margin: 2px 0 0; }
.btn--danger { border-color: var(--accent); background: var(--accent); color: var(--white); }
.btn--danger:hover { background: #b32221; border-color: #b32221; }

/* Admin: lesson requests */
.badge--count { margin-left: 4px; padding: 0 6px; }
.badge--count::before { display: none; }
.booking-edit { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.booking-edit input[name="note"] { flex: 1 1 220px; }