/* ============================================================
   VIDYA ERP — design system
   Idea: the school register. Ruled lines, tabular figures, a
   chalkboard-green sidebar, and a marigold rail that marks
   wherever you currently are. Nothing else is allowed to shout.
   ============================================================ */

:root {
  --board:      #123D33;   /* chalkboard green — sidebar */
  --board-deep: #0C2A23;
  --board-soft: #1C5145;
  --ink:        #1B2A26;   /* body text */
  --ink-soft:   #66776F;   /* secondary text */
  --paper:      #F2F5F2;   /* app background */
  --card:       #FFFFFF;
  --rule:       #DDE4DE;   /* the register's ruled line */
  --marigold:   #E0851F;   /* the only accent */
  --marigold-d: #C06F13;
  --ok:         #2E7D5B;
  --ok-bg:      #E4F2EB;
  --due:        #B4413B;
  --due-bg:     #FAE9E8;
  --warn:       #9A6B10;
  --warn-bg:    #FCF1DC;
  --muted-bg:   #EDF0EE;

  --radius: 6px;
  --shadow: 0 1px 2px rgba(18,61,51,.06), 0 4px 16px rgba(18,61,51,.05);
  --sans: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --serif: "IBM Plex Serif", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: var(--serif); font-weight: 600; letter-spacing: -.01em; margin: 0; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }

a { color: var(--board); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible { outline: 2px solid var(--marigold); outline-offset: 2px; border-radius: 3px; }

/* ---------- Shell ---------------------------------------------------- */
.shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 246px;
  flex: 0 0 246px;
  background: var(--board);
  color: #CBDBD4;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand {
  display: flex; align-items: center; gap: 10px;
  padding: 18px 18px 16px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.brand__mark {
  width: 34px; height: 34px; flex: 0 0 34px;
  display: grid; place-items: center;
  background: var(--marigold);
  color: #fff;
  border-radius: 5px;
  font-family: var(--serif); font-weight: 700; font-size: 17px;
}
.brand__name { font-family: var(--serif); font-size: 1rem; color: #fff; line-height: 1.2; }
.brand__sub  { font-size: 11px; color: #7E9C92; letter-spacing: .06em; text-transform: uppercase; }

.nav { padding: 10px 0 24px; flex: 1; }
.nav__label {
  font-size: 10px; letter-spacing: .12em; text-transform: uppercase;
  color: #6D8A80; padding: 16px 18px 6px;
}
.nav__link {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 18px;
  color: #CBDBD4; font-size: 14px;
  border-left: 3px solid transparent;
}
.nav__link:hover { background: rgba(255,255,255,.05); color: #fff; text-decoration: none; }
.nav__link.is-active {
  background: rgba(255,255,255,.07);
  color: #fff;
  border-left-color: var(--marigold);   /* the rail */
  font-weight: 500;
}
.nav__link svg { width: 17px; height: 17px; flex: 0 0 17px; stroke-width: 1.6; }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--rule);
  position: sticky; top: 0; z-index: 20;
}
.topbar__title { flex: 1; min-width: 0; }
.topbar__title h1 { font-size: 1.2rem; }
.topbar__crumb { font-size: 12px; color: var(--ink-soft); }

.who { display: flex; align-items: center; gap: 10px; }
.who__avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--board); color: #fff;
  display: grid; place-items: center;
  font-size: 12px; font-weight: 600; letter-spacing: .04em;
}
.who__name { font-size: 13px; font-weight: 500; line-height: 1.2; }
.who__role { font-size: 11px; color: var(--ink-soft); }

.content { padding: 24px; flex: 1; }
.content > * + * { margin-top: 20px; }

.burger { display: none; background: none; border: 0; padding: 6px; cursor: pointer; color: var(--ink); }

/* ---------- Cards & panels ------------------------------------------- */
.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card__head {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--rule);
}
.card__head h2 { flex: 1; }
.card__body { padding: 18px; }
.card__body > * + * { margin-top: 14px; }
.card__foot { padding: 12px 18px; border-top: 1px solid var(--rule); background: #FAFBFA; }

.grid { display: grid; gap: 16px; }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--sidebar { grid-template-columns: 2fr 1fr; }

/* ---------- Stat tiles ------------------------------------------------ */
.stat {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 16px 18px;
  position: relative;
  overflow: hidden;
}
.stat::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--rule);
}
.stat--accent::before { background: var(--marigold); }
.stat--ok::before     { background: var(--ok); }
.stat--due::before    { background: var(--due); }
.stat__label { font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-soft); }
.stat__value {
  font-family: var(--mono);
  font-size: 1.6rem; font-weight: 600;
  font-variant-numeric: tabular-nums;
  margin-top: 4px; line-height: 1.2;
}
.stat__meta { font-size: 12px; color: var(--ink-soft); margin-top: 2px; }

/* ---------- The register (tables) ------------------------------------ */
.table-wrap { overflow-x: auto; }
table.register { width: 100%; border-collapse: collapse; font-size: 14px; }
.register th {
  text-align: left;
  font-size: 11px; letter-spacing: .08em; text-transform: uppercase;
  color: var(--ink-soft); font-weight: 600;
  padding: 10px 14px;
  border-bottom: 1px solid var(--rule);
  white-space: nowrap;
  background: #FAFBFA;
}
.register td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--rule);
  vertical-align: middle;
}
.register tbody tr { border-left: 3px solid transparent; }
.register tbody tr:hover { background: #F7F9F7; border-left-color: var(--marigold); }
.register tbody tr:last-child td { border-bottom: 0; }
.register .num { font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
.register .right { text-align: right; }
.register .center { text-align: center; }

.empty { padding: 44px 20px; text-align: center; color: var(--ink-soft); }
.empty h3 { color: var(--ink); margin-bottom: 4px; }

/* ---------- Pills ------------------------------------------------------ */
.pill {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px; font-weight: 600;
  letter-spacing: .02em;
  white-space: nowrap;
}
.pill--ok    { background: var(--ok-bg);    color: var(--ok); }
.pill--due   { background: var(--due-bg);   color: var(--due); }
.pill--warn  { background: var(--warn-bg);  color: var(--warn); }
.pill--muted { background: var(--muted-bg); color: var(--ink-soft); }

/* ---------- Buttons ---------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 8px 15px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--ink);
  font: 500 14px var(--sans);
  cursor: pointer;
  white-space: nowrap;
  transition: background .12s, border-color .12s;
}
.btn:hover { background: #F4F6F4; border-color: #C6D0C8; text-decoration: none; }
.btn--primary {
  background: var(--board); border-color: var(--board); color: #fff;
}
.btn--primary:hover { background: var(--board-soft); border-color: var(--board-soft); }
.btn--accent {
  background: var(--marigold); border-color: var(--marigold); color: #fff;
}
.btn--accent:hover { background: var(--marigold-d); border-color: var(--marigold-d); }
.btn--danger { color: var(--due); border-color: #E8CFCD; background: #fff; }
.btn--danger:hover { background: var(--due-bg); }
.btn--sm { padding: 5px 10px; font-size: 13px; }
.btn--block { width: 100%; }
.btn svg { width: 16px; height: 16px; stroke-width: 1.8; }

.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- Forms ------------------------------------------------------ */
.field { display: block; }
.field + .field { margin-top: 14px; }
.label {
  display: block;
  font-size: 12px; font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 5px;
  letter-spacing: .02em;
}
.input, .select, .textarea {
  width: 100%;
  padding: 8px 11px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: #fff;
  font: 15px/1.4 var(--sans);
  color: var(--ink);
}
.input:focus, .select:focus, .textarea:focus {
  border-color: var(--board-soft);
  outline: 2px solid rgba(224,133,31,.25);
  outline-offset: 0;
}
.input[readonly] { background: #F4F6F4; color: var(--ink-soft); font-family: var(--mono); }
.textarea { min-height: 120px; resize: vertical; }
.input--num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.hint { font-size: 12px; color: var(--ink-soft); margin-top: 4px; }
.error-text { font-size: 12px; color: var(--due); margin-top: 4px; }
.input.has-error, .select.has-error { border-color: var(--due); }

.form-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.form-grid--2 { grid-template-columns: repeat(2, 1fr); }
.form-grid .field { margin-top: 0; }
.span-2 { grid-column: span 2; }
.span-3 { grid-column: span 3; }

.check { display: flex; align-items: center; gap: 8px; font-size: 14px; cursor: pointer; }
.check input { width: 16px; height: 16px; accent-color: var(--board); }

fieldset { border: 0; padding: 0; margin: 0; }
.fieldset-title {
  font-family: var(--serif); font-size: 13px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .08em;
  color: var(--ink-soft);
  padding-bottom: 8px; margin-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}

/* Filter bar sits above every register */
.filters {
  display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end;
  padding: 14px 18px;
  border-bottom: 1px solid var(--rule);
}
.filters .field { margin-top: 0; min-width: 150px; }
.filters .field--grow { flex: 1; min-width: 200px; }

/* ---------- Attendance marks (segmented control) ---------------------- */
.marks { display: inline-flex; border: 1px solid var(--rule); border-radius: var(--radius); overflow: hidden; }
.marks label {
  padding: 5px 11px;
  font-size: 12px; font-weight: 600;
  cursor: pointer;
  border-right: 1px solid var(--rule);
  background: #fff; color: var(--ink-soft);
  user-select: none;
}
.marks label:last-child { border-right: 0; }
.marks input { position: absolute; opacity: 0; width: 0; height: 0; }
.marks input:checked + span { display: inline; }
.marks label:has(input:checked) { color: #fff; }
.marks label.m-present:has(input:checked) { background: var(--ok); }
.marks label.m-absent:has(input:checked)  { background: var(--due); }
.marks label.m-late:has(input:checked)    { background: var(--warn); }
.marks label.m-leave:has(input:checked)   { background: var(--board-soft); }
.marks label:focus-within { outline: 2px solid var(--marigold); outline-offset: -2px; }

/* Monthly grid */
.month-grid { font-size: 12px; }
.month-grid td, .month-grid th { padding: 4px 3px; text-align: center; border: 1px solid var(--rule); }
.month-grid .name-col { text-align: left; white-space: nowrap; padding: 4px 10px; position: sticky; left: 0; background: #fff; }
.m { display: block; width: 18px; height: 18px; line-height: 18px; border-radius: 3px; margin: 0 auto; font-weight: 600; font-size: 10px; }
.m-p { background: var(--ok-bg);   color: var(--ok); }
.m-a { background: var(--due-bg);  color: var(--due); }
.m-l { background: var(--warn-bg); color: var(--warn); }
.m-v { background: var(--muted-bg);color: var(--ink-soft); }

/* ---------- Flash ------------------------------------------------------ */
.flash {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 11px 14px;
  border-radius: var(--radius);
  border: 1px solid;
  font-size: 14px;
}
.flash--success { background: var(--ok-bg);   border-color: #BFE0D0; color: #1F5C42; }
.flash--error   { background: var(--due-bg);  border-color: #EFCCCA; color: #8E2F2A; }
.flash--info    { background: #E7EFF7;        border-color: #C7D9EA; color: #24557F; }

/* ---------- Misc ------------------------------------------------------- */
.avatar {
  width: 36px; height: 36px; border-radius: 50%;
  object-fit: cover;
  background: var(--muted-bg);
  display: grid; place-items: center;
  font-size: 12px; font-weight: 600; color: var(--ink-soft);
  flex: 0 0 36px;
}
.avatar--lg { width: 84px; height: 84px; flex-basis: 84px; font-size: 24px; }
.person { display: flex; align-items: center; gap: 10px; }
.person__name { font-weight: 500; }
.person__meta { font-size: 12px; color: var(--ink-soft); font-family: var(--mono); }

.pager { display: flex; gap: 6px; align-items: center; justify-content: flex-end; padding: 12px 18px; font-size: 13px; }
.pager a, .pager span {
  padding: 4px 9px; border: 1px solid var(--rule); border-radius: 4px;
  font-family: var(--mono); font-size: 13px;
}
.pager .is-current { background: var(--board); color: #fff; border-color: var(--board); }

.defs { display: grid; grid-template-columns: 140px 1fr; gap: 8px 16px; font-size: 14px; }
.defs dt { color: var(--ink-soft); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; padding-top: 2px; }
.defs dd { margin: 0; }

.chart-box { height: 220px; position: relative; }

.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--rule); }
.tabs a {
  padding: 9px 14px; font-size: 14px; color: var(--ink-soft);
  border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.tabs a:hover { color: var(--ink); text-decoration: none; }
.tabs a.is-active { color: var(--board); border-bottom-color: var(--marigold); font-weight: 600; }

.muted { color: var(--ink-soft); }
.mono  { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.small { font-size: 12px; }
.nowrap{ white-space: nowrap; }
.stack > * + * { margin-top: 16px; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* ---------- Login ------------------------------------------------------ */
.login {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.login__aside {
  background: var(--board);
  color: #CBDBD4;
  padding: 48px;
  display: flex; flex-direction: column; justify-content: space-between;
  background-image:
    repeating-linear-gradient(to bottom, transparent 0 39px, rgba(255,255,255,.05) 39px 40px);
}
.login__aside h1 { font-size: 2.1rem; color: #fff; max-width: 12ch; line-height: 1.15; }
.login__aside p { max-width: 42ch; }
.login__form { display: grid; place-items: center; padding: 32px; }
.login__card { width: 100%; max-width: 380px; }

/* ---------- Print ------------------------------------------------------ */
.paper-sheet {
  max-width: 800px; margin: 24px auto; background: #fff;
  border: 1px solid var(--rule); padding: 36px;
}
.doc-head { display: flex; gap: 16px; align-items: center; border-bottom: 2px solid var(--board); padding-bottom: 14px; }
.doc-head h1 { font-size: 1.4rem; }
.doc-title {
  text-align: center; font-family: var(--serif); font-weight: 600;
  text-transform: uppercase; letter-spacing: .14em; font-size: 13px;
  margin: 20px 0; color: var(--ink-soft);
}
.stamp {
  display: inline-block; transform: rotate(-6deg);
  border: 2px solid var(--ok); color: var(--ok);
  padding: 4px 12px; border-radius: 4px;
  font-family: var(--serif); font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
}
.stamp--due { border-color: var(--due); color: var(--due); }

@media print {
  .no-print, .sidebar, .topbar { display: none !important; }
  body { background: #fff; font-size: 12px; }
  .paper-sheet { border: 0; margin: 0; padding: 0; max-width: none; }
  .register th { background: #fff; }
  a { color: inherit; }
}

/* ---------- Responsive -------------------------------------------------- */
@media (max-width: 1100px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--sidebar { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: repeat(2, 1fr); }
  .span-3 { grid-column: span 2; }
}

@media (max-width: 820px) {
  .sidebar {
    position: fixed; left: 0; top: 0; bottom: 0; z-index: 60;
    transform: translateX(-100%);
    transition: transform .2s ease;
  }
  .sidebar.is-open { transform: none; box-shadow: 0 0 0 100vw rgba(11,32,26,.45); }
  .burger { display: block; }
  .content { padding: 16px; }
  .grid--4, .grid--3, .grid--2 { grid-template-columns: 1fr; }
  .form-grid, .form-grid--2 { grid-template-columns: 1fr; }
  .span-2, .span-3 { grid-column: span 1; }
  .login { grid-template-columns: 1fr; }
  .login__aside { display: none; }
  .who__name, .who__role { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}