/* ---------------------------------------------------------------------------
   Design tokens
--------------------------------------------------------------------------- */

:root {
  --color-bg: #f6f7f9;
  --color-surface: #ffffff;
  --color-border: #e3e6eb;
  --color-border-strong: #cdd2db;
  --color-text: #1a1d23;
  --color-text-secondary: #565d6b;
  --color-text-muted: #8a92a0;

  --color-accent: #2557d6;
  --color-accent-hover: #1e46b3;
  --color-accent-soft: #eaf0fe;
  --color-accent-soft-border: #c7d7fb;

  --color-success: #157a43;
  --color-success-soft: #eafbf1;
  --color-success-border: #b9e8cd;

  --color-danger: #b3261e;
  --color-danger-hover: #93201a;
  --color-danger-soft: #fdeeed;
  --color-danger-border: #f3c6c2;

  --color-warning-soft: #fff6e0;
  --color-warning-border: #e6cb85;

  --radius-sm: 5px;
  --radius: 7px;
  --radius-lg: 11px;

  --shadow-sm: 0 1px 2px rgba(20, 24, 32, 0.06);
  --shadow-md: 0 8px 24px rgba(20, 24, 32, 0.12), 0 2px 6px rgba(20, 24, 32, 0.06);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* ---------------------------------------------------------------------------
   Base / reset
--------------------------------------------------------------------------- */

* {
  box-sizing: border-box;
}

html {
  font-size: 15px;
}

body {
  font-family: var(--font-sans);
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

p {
  line-height: 1.5;
}

a {
  color: var(--color-accent);
}

/* Page-level h1 on the wide report-style pages (Crosscheck, Billing, Users) —
   .teacher-list h1 below overrides this for the narrow sidebar context. */
h1 {
  font-size: 1.375rem;
  margin: 0 0 0.35rem;
}

h2 {
  font-size: 1.2rem;
  margin: 0;
}

h3 {
  font-size: 0.95rem;
  margin: 1rem 0 0.4rem;
}

h4 {
  font-size: 0.875rem;
  margin: 0 0 0.6rem;
}

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

.app-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.layout {
  display: flex;
  flex: 1;
  min-height: 0;
}

.teacher-list {
  width: 280px;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  padding: 1.1rem;
  flex-shrink: 0;
}

.teacher-list h1 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin: 0 0 0.5rem;
}

.detail {
  flex: 1;
  padding: 1.75rem 2rem;
  overflow-y: auto;
}

.detail > h1 {
  margin-bottom: 0.25rem;
}

.placeholder {
  color: var(--color-text-muted);
}

/* ---------------------------------------------------------------------------
   Top bar (brand + module nav + logged-in-as, spans the full width on
   every view — the sidebar-style pages used to nest .module-nav inside the
   narrow 280px aside, which wrapped it into a cramped block in the upper
   left; it's now a sibling of .layout instead, same markup on every page.)
--------------------------------------------------------------------------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  height: 50px;
  padding: 0 1.25rem;
  flex-shrink: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.brand {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-text);
  flex-shrink: 0;
}

.module-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.8125rem;
}

.module-nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: background-color 0.12s ease, color 0.12s ease;
}

.module-nav a:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.module-nav a.active {
  color: var(--color-accent);
  background: var(--color-accent-soft);
  font-weight: 600;
}

.nav-user-info {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  margin-left: auto;
  padding-left: 1.75rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-user-info a {
  color: var(--color-text-muted);
  text-decoration: underline;
}

.nav-user-info a:hover {
  color: var(--color-text-secondary);
}

/* ---------------------------------------------------------------------------
   Sidebar entity lists (#teachers, #tutors)
--------------------------------------------------------------------------- */

#teachers,
#tutors {
  list-style: none;
  margin: 0;
  padding: 0;
}

#teachers li,
#tutors li {
  padding: 0.5rem 0.6rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--color-text);
  margin-bottom: 1px;
  transition: background-color 0.1s ease;
}

#teachers li:hover,
#tutors li:hover {
  background: var(--color-bg);
}

#teachers li.active,
#tutors li.active {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: 600;
}

/* ---------------------------------------------------------------------------
   Buttons
--------------------------------------------------------------------------- */

button {
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: background-color 0.12s ease, border-color 0.12s ease, color 0.12s ease;
}

button:hover {
  background: var(--color-bg);
  border-color: #b8bec9;
}

button:active {
  background: #ebedf1;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

/* Primary top-level actions get filled accent styling. */
#add-teacher-btn,
#add-tutor-btn,
#add-student-btn,
#create-teacher-btn,
#create-tutor-btn,
#create-student-btn,
#add-item-btn,
#add-user-btn,
#run-btn,
#login-form button[type="submit"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

#add-teacher-btn:hover,
#add-tutor-btn:hover,
#add-student-btn:hover,
#create-teacher-btn:hover,
#create-tutor-btn:hover,
#create-student-btn:hover,
#add-item-btn:hover,
#add-user-btn:hover,
#run-btn:hover,
#login-form button[type="submit"]:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

#add-teacher-btn,
#add-tutor-btn,
#add-student-btn,
#rates-btn,
#print-contracts-btn {
  width: 100%;
  margin-bottom: 0.6rem;
  padding: 0.5rem;
}

/* Adjusted a few times a year at most — set apart from the primary
   add/edit flow above instead of blending into it. */
#rates-btn {
  margin-top: 1.25rem;
  color: var(--color-text-secondary);
}

#delete-teacher-btn,
.delete-item-btn,
.delete-alloc-btn,
.delete-assign-btn,
.delete-slot-btn,
.delete-abs-btn,
#delete-cal-btn,
#delete-tutor-confirm-btn {
  color: var(--color-danger);
  border-color: var(--color-danger-border);
  background: var(--color-danger-soft);
}

#delete-teacher-btn:hover,
.delete-item-btn:hover,
.delete-alloc-btn:hover,
.delete-assign-btn:hover,
.delete-slot-btn:hover,
.delete-abs-btn:hover,
#delete-cal-btn:hover,
#delete-tutor-confirm-btn:hover {
  background: var(--color-danger-hover);
  border-color: var(--color-danger-hover);
  color: #fff;
}

/* ---------------------------------------------------------------------------
   Form controls
--------------------------------------------------------------------------- */

input,
select,
textarea {
  font-family: inherit;
  font-size: 0.8125rem;
  padding: 0.4rem 0.55rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
}

input[type="checkbox"],
input[type="radio"] {
  width: auto;
  padding: 0;
}

input[type="number"] {
  width: 100px;
  padding: 0.4rem 0.55rem;
}

#new-rate-amount {
  width: 160px;
}

.note-input {
  width: 220px;
}

label {
  color: var(--color-text-secondary);
}

/* ---------------------------------------------------------------------------
   Tables
--------------------------------------------------------------------------- */

.table-scroll {
  overflow-x: auto;
  max-width: 100%;
}

table.items,
table.allocations {
  border-collapse: collapse;
  width: 100%;
  margin-top: 1rem;
  font-size: 0.8125rem;
  background: var(--color-surface);
}

table.items th,
table.allocations th {
  background: var(--color-bg);
  color: var(--color-text-secondary);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  text-align: left;
  border: 1px solid var(--color-border);
  border-bottom-width: 1px;
  padding: 0.55rem 0.7rem;
  white-space: nowrap;
}

table.items td,
table.allocations td {
  border: 1px solid var(--color-border);
  border-bottom-color: var(--color-border-strong);
  padding: 0.5rem 0.7rem;
  text-align: left;
  vertical-align: middle;
}

/* Zebra striping — a long list of similar rows is easy to lose your place
   scanning across, so every other row gets a tint the eye can lock onto.
   Hover gets its own distinct shade (not just --color-bg) so it doesn't
   blend into the stripe on an even row. */
table.items tbody tr:nth-child(even) td,
table.allocations tbody tr:nth-child(even) td {
  background: var(--color-bg);
}

table.items tbody tr:hover td,
table.allocations tbody tr:hover td {
  background: #e5e8ee;
}

table.items tfoot td {
  background: var(--color-bg);
  font-weight: 600;
  border-top: 2px solid var(--color-border-strong);
}

/* Tutoring Overview grid — a filled cell is a link to go log what actually
   happened for that tutor/student pairing. */
.overview-cell {
  display: block;
  margin: -0.5rem -0.7rem;
  padding: 0.5rem 0.7rem;
  text-align: center;
  text-decoration: none;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  border-radius: var(--radius-sm);
  transition: background-color 0.1s ease, color 0.1s ease;
}

.overview-cell:hover {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: 600;
}

/* ---------------------------------------------------------------------------
   Panels / cards
--------------------------------------------------------------------------- */

.add-teacher-form,
.add-item-form,
.confirm-box,
.dock-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  box-shadow: var(--shadow-sm);
}

.add-teacher-form {
  margin-bottom: 0.85rem;
}

.add-teacher-form label,
.add-item-form label {
  display: block;
  font-size: 0.8125rem;
  margin: 0.5rem 0;
}

.add-teacher-form input,
.add-teacher-form textarea,
.add-teacher-form select {
  width: 100%;
  margin-top: 0.2rem;
}

.add-teacher-form input[type="checkbox"] {
  width: auto;
}

.add-item-form {
  margin-top: 1.1rem;
  max-width: 760px;
}

.add-item-form label {
  display: inline-block;
  margin-right: 1.1rem;
}

.add-item-form input,
.add-item-form select {
  display: block;
  margin-top: 0.2rem;
}

.confirm-box {
  border-color: var(--color-danger-border);
  background: var(--color-danger-soft);
  max-width: 520px;
}

/* Schedule board's discard-confirm/status/conflict messages, pinned to the
   bottom of the viewport instead of sitting in the document flow near the
   top — the page is tall (grids, Holding Area, publish toolbar all below
   the fold), so a message that only appeared up top was easy to miss while
   working further down. */
.toast-stack {
  position: fixed;
  left: 50%;
  bottom: 1.25rem;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
  width: min(560px, calc(100% - 2.5rem));
  pointer-events: none;
}

.toast-stack > * {
  pointer-events: auto;
  width: 100%;
  margin: 0;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.toast-stack > *:empty {
  display: none;
}

.confirm-box p {
  margin-top: 0;
}

.confirm-box button {
  margin-right: 0.5rem;
}

.dock-panel {
  background: var(--color-bg);
  margin: 0.35rem 0;
}

/* ---------------------------------------------------------------------------
   Misc small pieces
--------------------------------------------------------------------------- */

.new-school-form {
  margin-left: 0.5rem;
}

.new-school-form input[type="text"] {
  width: 160px;
}

.alloc-status-label {
  margin-right: 0.5rem;
  color: var(--color-text-secondary);
}

#add-alloc-btn {
  margin-top: 0.6rem;
}

.edit-field {
  display: inline-flex;
  gap: 0.4rem;
  align-items: center;
}

.amount-preview {
  font-variant-numeric: tabular-nums;
}

.amount-preview.dirty {
  background: var(--color-warning-soft);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-sm);
  padding: 0.1rem 0.4rem;
  font-weight: 600;
}

.totals-panel {
  width: fit-content;
  margin-left: auto;
  margin-top: 1rem;
  text-align: right;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  box-shadow: var(--shadow-sm);
}

.total {
  font-size: 1rem;
  margin: 0.3rem 0;
  white-space: nowrap;
}

.total strong {
  font-variant-numeric: tabular-nums;
}

.success,
.error {
  display: inline-block;
  font-size: 0.8125rem;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  margin: 0.35rem 0;
}

.success {
  color: var(--color-success);
  background: var(--color-success-soft);
  border: 1px solid var(--color-success-border);
}

.error {
  color: var(--color-danger);
  background: var(--color-danger-soft);
  border: 1px solid var(--color-danger-border);
}

.detail-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.detail-header h2 {
  margin: 0;
}

.attendance-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.6rem;
}

.attendance-toolbar button.active {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-color: var(--color-accent-soft-border);
  font-weight: 600;
}

/* ---------------------------------------------------------------------------
   Settings popover panel
--------------------------------------------------------------------------- */

.settings-panel {
  position: fixed;
  top: 4.5rem;
  left: 300px;
  width: 640px;
  max-width: calc(100vw - 320px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.1rem;
  margin-bottom: 0.75rem;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-md);
  z-index: 10;
}

.settings-panel h3 {
  margin: 0.9rem 0 0.3rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--color-border);
}

.settings-panel h3:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.settings-panel ul {
  list-style: none;
  margin: 0 0 0.5rem;
  padding: 0;
  font-size: 0.8125rem;
}

.settings-panel ul li {
  padding: 0.2rem 0;
  border-bottom: 1px solid var(--color-bg);
}

.hint {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin: 0.3rem 0;
}

.mini-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  margin: 0.4rem 0;
}

.sub-field {
  margin: 0 0.35rem;
}

/* ---------------------------------------------------------------------------
   Calendar
--------------------------------------------------------------------------- */

.calendar-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: 0.6rem 0;
}

.calendar-nav button {
  padding: 0.25rem 0.65rem;
}

#cal-month-label {
  font-weight: 600;
  min-width: 10rem;
  text-align: center;
  font-size: 0.875rem;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 3px;
  margin-bottom: 0.6rem;
}

.calendar-day-header {
  min-width: 0;
  text-align: center;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-text-muted);
  padding: 0.25rem 0;
}

.calendar-day {
  min-width: 0;
  min-height: 3.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.25rem;
  cursor: pointer;
  font-size: 0.72rem;
  overflow: hidden;
  background: var(--color-surface);
  transition: background-color 0.1s ease;
}

.calendar-day:hover {
  background: var(--color-bg);
  border-color: var(--color-border-strong);
}

.calendar-day.blank {
  border: none;
  cursor: default;
  background: transparent;
}

.calendar-day.no-school {
  background: var(--color-danger-soft);
  border-color: var(--color-danger-border);
}

.calendar-day.no-school:hover {
  background: #fbdcda;
}

.calendar-day.early-dismissal {
  background: var(--color-warning-soft);
  border-color: var(--color-warning-border);
}

.calendar-day.early-dismissal:hover {
  background: #ffedc0;
}

.calendar-day-num {
  font-weight: 600;
}

.calendar-day-label {
  color: var(--color-text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.calendar-legend {
  display: flex;
  gap: 1rem;
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.6rem;
}

.legend-swatch {
  display: inline-block;
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 3px;
  vertical-align: middle;
  margin-right: 0.3rem;
}

.legend-swatch.no-school {
  background: var(--color-danger-soft);
  border: 1px solid var(--color-danger-border);
}

.legend-swatch.early-dismissal {
  background: var(--color-warning-soft);
  border: 1px solid var(--color-warning-border);
}

/* ---------------------------------------------------------------------------
   Login page
--------------------------------------------------------------------------- */

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  padding: 1.5rem;
}

.login-card {
  width: 100%;
  max-width: 360px;
}

.login-card h1 {
  font-size: 1.15rem;
  text-align: center;
  margin-bottom: 1.25rem;
}

.login-card .add-teacher-form {
  padding: 1.25rem;
}

.login-card button[type="submit"] {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.55rem;
}

/* ---------------------------------------------------------------------------
   Schedule board
--------------------------------------------------------------------------- */

.schedule-grid {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
}

.schedule-day-col {
  flex: 0 0 auto;
  min-width: 220px;
}

.schedule-day-col h4 {
  text-align: center;
}

table.schedule-day-table {
  font-size: 0.72rem;
}

table.schedule-day-table th,
table.schedule-day-table td {
  padding: 0.3rem;
}

.schedule-time {
  white-space: nowrap;
  color: var(--color-text-muted);
  font-weight: 400;
}

.schedule-cell {
  vertical-align: top;
  min-width: 90px;
  background: var(--color-bg);
}

.schedule-box {
  background: var(--color-accent-soft);
  border: 1px solid var(--color-accent-soft-border);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.4rem;
  margin-bottom: 0.25rem;
  cursor: pointer;
}

.schedule-box[draggable="true"] {
  cursor: grab;
}

.schedule-box[draggable="true"]:active {
  cursor: grabbing;
}

.schedule-box-teacher {
  font-weight: 600;
}

.schedule-box-subject {
  color: var(--color-text-secondary);
}

.holding-area {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  min-height: 3rem;
  background: var(--color-surface);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius);
  padding: 0.6rem;
  margin-bottom: 0.6rem;
}

.holding-area .schedule-box {
  margin-bottom: 0;
  min-width: 140px;
}

/* ---------------------------------------------------------------------------
   Dashboard
--------------------------------------------------------------------------- */

.dashboard-section {
  margin-top: 1.75rem;
}

.dashboard-section:first-of-type {
  margin-top: 1.25rem;
}

.dashboard-subsection {
  margin-top: 1rem;
}

.dashboard-subsection h3 {
  color: var(--color-text-secondary);
  font-weight: 600;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 0.75rem;
  margin-top: 0.6rem;
}

.stat-tile {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem 0.9rem;
  box-shadow: var(--shadow-sm);
}

.stat-tile .stat-label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.stat-tile .stat-value {
  font-size: 1.35rem;
  font-weight: 600;
  margin-top: 0.3rem;
}

.stat-tile-highlight {
  background: var(--color-accent-soft);
  border-color: var(--color-accent-soft-border);
}

.stat-tile-highlight .stat-value {
  color: var(--color-accent);
}

.stat-tile-clickable {
  cursor: pointer;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}

.stat-tile-clickable:hover {
  border-color: var(--color-accent-soft-border);
}

.stat-tile-active {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent);
}

#dash-salary-detail {
  margin-top: 0.6rem;
}

table.items th.sortable {
  cursor: pointer;
  user-select: none;
}

table.items th.sortable:hover {
  color: var(--color-text);
  background: var(--color-border);
}