@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,300&family=DM+Serif+Display:ital@0;1&display=swap');

/* ─── Japandi Design Tokens ─────────────────────────────── */
:root {
  /* Warm Neutral Palette */
  --bg:          #F2EDE4;
  --surface:     #FAF7F2;
  --surface-2:   #F0EBE1;
  --border:      #DDD5C8;
  --border-soft: #EAE4DA;

  /* Ink */
  --ink:         #2A2822;
  --ink-2:       #6B6357;
  --ink-3:       #A09589;

  /* Sage Green — primary accent */
  --sage:        #4A5C40;
  --sage-light:  #7A9168;
  --sage-muted:  #C8D6BF;
  --sage-bg:     #EDF2EA;

  /* Warm Clay — secondary accent */
  --clay:        #9C6B4A;
  --clay-light:  #C49070;
  --clay-muted:  #E8D4C3;
  --clay-bg:     #F5EDE5;

  /* Status colours */
  --paid:        #4E7B52;
  --paid-bg:     #E8F2E9;
  --unpaid:      #8B6914;
  --unpaid-bg:   #F5EDD5;
  --partial:     #6B5B9C;
  --partial-bg:  #EEE9F8;
  --refund:      #A04A4A;
  --refund-bg:   #F5E8E8;
  --holiday:     #2E7D8C;
  --holiday-bg:  #E3F3F6;

  /* Chart palette */
  --chart-1: #4A5C40;
  --chart-2: #9C6B4A;
  --chart-3: #2E7D8C;
  --chart-4: #6B5B9C;
  --chart-5: #8B6914;

  /* Spacing */
  --r-sm:   6px;
  --r-md:   10px;
  --r-lg:   16px;
  --r-xl:   24px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(42,40,34,0.06);
  --shadow-md: 0 4px 16px rgba(42,40,34,0.08);
  --shadow-lg: 0 8px 32px rgba(42,40,34,0.10);

  --sidebar-w: 240px;
  --topbar-h:  64px;
}

/* ─── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: inherit; }
a { color: inherit; text-decoration: none; }

/* ─── Layout Shell ───────────────────────────────────────── */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-areas:
    "sidebar topbar"
    "sidebar main";
  min-height: 100vh;
}

/* ─── Sidebar ────────────────────────────────────────────── */
.sidebar {
  grid-area: sidebar;
  background: var(--ink);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  z-index: 100;
  overflow-y: auto;
}
.sidebar-logo {
  padding: 24px 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-logo .brand-name {
  font-family: 'DM Serif Display', serif;
  font-size: 18px;
  color: var(--surface);
  letter-spacing: 0.01em;
  line-height: 1.2;
}
.sidebar-logo .brand-sub {
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 3px;
}
.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-section-label {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 16px 8px 6px;
  font-weight: 500;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--r-md);
  color: rgba(255,255,255,0.55);
  font-size: 14px;
  font-weight: 400;
  transition: all 0.18s ease;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}
.nav-item .nav-icon { font-size: 16px; width: 20px; text-align: center; }
.nav-item:hover { background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.85); }
.nav-item.active {
  background: var(--sage);
  color: #fff;
  font-weight: 500;
}
.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.sidebar-footer .nav-item { font-size: 13px; }

/* ─── Topbar ─────────────────────────────────────────────── */
.topbar {
  grid-area: topbar;
  position: sticky;
  top: 0;
  margin-left: var(--sidebar-w);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  height: var(--topbar-h);
  z-index: 50;
}
.topbar-title {
  font-family: 'DM Serif Display', serif;
  font-size: 22px;
  color: var(--ink);
}
.topbar-right { display: flex; align-items: center; gap: 12px; }
.topbar-date {
  font-size: 13px;
  color: var(--ink-2);
  background: var(--surface-2);
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid var(--border-soft);
}

/* ─── Main Content ───────────────────────────────────────── */
.main {
  grid-area: main;
  margin-left: var(--sidebar-w);
  padding: 32px 32px 60px;
  min-height: calc(100vh - var(--topbar-h));
}
.page { display: none; animation: fadeIn 0.25s ease; }
.page.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

/* ─── Section Headers ────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}
.page-title {
  font-family: 'DM Serif Display', serif;
  font-size: 28px;
  color: var(--ink);
}
.page-subtitle { font-size: 14px; color: var(--ink-2); margin-top: 2px; }

/* ─── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.card-title {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin-bottom: 8px;
}
.stat-value {
  font-family: 'DM Serif Display', serif;
  font-size: 32px;
  color: var(--ink);
  line-height: 1;
}
.stat-value.positive { color: var(--paid); }
.stat-value.negative { color: var(--refund); }
.stat-sub { font-size: 13px; color: var(--ink-3); margin-top: 6px; }

/* ─── Grids ──────────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }

/* ─── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border-radius: var(--r-md);
  font-size: 14px;
  font-weight: 500;
  border: 1.5px solid transparent;
  transition: all 0.16s ease;
}
.btn-primary {
  background: var(--sage);
  color: #fff;
  border-color: var(--sage);
}
.btn-primary:hover { background: var(--sage-light); border-color: var(--sage-light); }
.btn-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--border);
  background: var(--surface);
}
.btn-secondary:hover { border-color: var(--ink-2); }
.btn-clay { background: var(--clay); color: #fff; border-color: var(--clay); }
.btn-clay:hover { background: var(--clay-light); border-color: var(--clay-light); }
.btn-danger { background: var(--refund); color: #fff; border-color: var(--refund); }
.btn-sm { padding: 5px 12px; font-size: 13px; }
.btn-icon { padding: 6px; border-radius: var(--r-sm); }

/* ─── Badges ─────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.badge-paid     { background: var(--paid-bg);    color: var(--paid); }
.badge-unpaid   { background: var(--unpaid-bg);  color: var(--unpaid); }
.badge-partial  { background: var(--partial-bg); color: var(--partial); }
.badge-refund   { background: var(--refund-bg);  color: var(--refund); }
.badge-holiday  { background: var(--holiday-bg); color: var(--holiday); }
.badge-regular  { background: var(--sage-bg);    color: var(--sage); }

/* ─── Tables ─────────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--r-lg);
  border: 1px solid var(--border-soft);
}
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
}
thead th {
  text-align: left;
  padding: 13px 16px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-2);
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}
tbody td {
  padding: 14px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--border-soft);
  vertical-align: middle;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--bg); }

/* ─── Forms ──────────────────────────────────────────────── */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-2);
}
input, select, textarea {
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  color: var(--ink);
  transition: border-color 0.15s;
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--sage);
  box-shadow: 0 0 0 3px rgba(74,92,64,0.10);
}
input::placeholder { color: var(--ink-3); }
textarea { resize: vertical; min-height: 80px; }

/* ─── Modal ──────────────────────────────────────────────── */
.modal-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(42,40,34,0.45);
  z-index: 200;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(3px);
  animation: fadeBg 0.2s ease;
}
.modal-backdrop.open { display: flex; }
@keyframes fadeBg { from { opacity: 0; } to { opacity: 1; } }
.modal {
  background: var(--surface);
  border-radius: var(--r-xl);
  padding: 32px;
  width: 560px;
  max-width: 95vw;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.22s ease;
}
.modal.modal-sm { width: 400px; }
@keyframes slideUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.modal-title {
  font-family: 'DM Serif Display', serif;
  font-size: 20px;
}
.modal-close {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--ink-2);
  padding: 4px;
  border-radius: var(--r-sm);
  line-height: 1;
}
.modal-close:hover { color: var(--ink); background: var(--surface-2); }
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-soft);
}

/* ─── Tabs ───────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--surface-2);
  padding: 4px;
  border-radius: var(--r-md);
  border: 1px solid var(--border-soft);
  width: fit-content;
  margin-bottom: 24px;
}
.tab-btn {
  padding: 7px 18px;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-2);
  background: none;
  border: none;
  transition: all 0.15s;
}
.tab-btn.active {
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
}
.tab-btn:hover:not(.active) { color: var(--ink); }

/* ─── Empty State ────────────────────────────────────────── */
.empty {
  text-align: center;
  padding: 60px 24px;
  color: var(--ink-3);
}
.empty-icon { font-size: 48px; margin-bottom: 16px; opacity: 0.5; }
.empty-text { font-size: 15px; }
.empty-sub { font-size: 13px; margin-top: 6px; }

/* ─── Backup Banner ──────────────────────────────────────── */
.backup-banner {
  display: none;
  background: var(--clay-bg);
  border: 1px solid var(--clay-muted);
  border-radius: var(--r-lg);
  padding: 14px 20px;
  margin-bottom: 24px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  animation: fadeIn 0.3s ease;
}
.backup-banner.show { display: flex; }
.backup-banner-text { font-size: 14px; color: var(--clay); }
.backup-banner-text strong { font-weight: 600; }
.backup-banner-actions { display: flex; gap: 8px; flex-shrink: 0; }

/* ─── Chart Controls ─────────────────────────────────────── */
.chart-section { margin-top: 8px; }
.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.chart-wrap { position: relative; height: 260px; }

/* ─── Misc Utils ─────────────────────────────────────────── */
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-24 { margin-bottom: 24px; }
.flex  { display: flex; }
.flex-center { display: flex; align-items: center; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.text-sm { font-size: 13px; }
.text-muted { color: var(--ink-2); }
.text-right { text-align: right; }
.divider { border: none; border-top: 1px solid var(--border-soft); margin: 20px 0; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--surface-2);
  border: 1px solid var(--border-soft);
  border-radius: 20px;
  padding: 3px 10px;
  font-size: 12px;
  color: var(--ink-2);
}
.action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}
.search-wrap { position: relative; flex: 1; max-width: 300px; }
.search-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--ink-3); }
.search-input { padding-left: 36px; width: 100%; }

/* ─── Activity Feed ──────────────────────────────────────── */
.activity-list { display: flex; flex-direction: column; gap: 2px; }
.activity-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-soft);
}
.activity-item:last-child { border-bottom: none; }
.activity-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  margin-top: 6px;
  flex-shrink: 0;
}
.activity-dot.green { background: var(--paid); }
.activity-dot.clay  { background: var(--clay); }
.activity-dot.muted { background: var(--ink-3); }
.activity-body { flex: 1; }
.activity-main { font-size: 14px; color: var(--ink); }
.activity-time { font-size: 12px; color: var(--ink-3); margin-top: 2px; }

/* ─── Session Grid ───────────────────────────────────────── */
.session-week-grid {
  display: grid;
  gap: 8px;
}
.session-row {
  display: grid;
  grid-template-columns: 160px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--surface-2);
  border-radius: var(--r-md);
  border: 1px solid var(--border-soft);
}
.session-row .student-name { font-size: 14px; font-weight: 500; }
.session-status-btns { display: flex; gap: 6px; }
.session-btn {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  border: 1.5px solid transparent;
  background: none;
  cursor: pointer;
  transition: all 0.14s;
}
.session-btn[data-val="attended"]  { border-color: var(--sage-muted); color: var(--sage); }
.session-btn[data-val="attended"].active  { background: var(--sage); color: #fff; border-color: var(--sage); }
.session-btn[data-val="missed"]    { border-color: var(--clay-muted); color: var(--clay); }
.session-btn[data-val="missed"].active    { background: var(--clay); color: #fff; border-color: var(--clay); }
.session-btn[data-val="makeup"]   { border-color: var(--partial-bg); color: var(--partial); }
.session-btn[data-val="makeup"].active   { background: var(--partial); color: #fff; border-color: var(--partial); }
.session-btn[data-val="holiday-off"] { border-color: var(--border); color: var(--ink-3); }
.session-btn[data-val="holiday-off"].active { background: var(--ink-3); color: #fff; }

/* ─── Expense Category Chips ─────────────────────────────── */
.category-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.cat-chip {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  border: 1.5px solid var(--border);
  background: none;
  color: var(--ink-2);
  cursor: pointer;
  transition: all 0.15s;
}
.cat-chip.active { background: var(--sage); border-color: var(--sage); color: #fff; }

/* ─── Attendance / Gradebook Grid ────────────────────────── */
.att-grid {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.att-grid thead th {
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-2);
  padding: 8px 6px;
  position: sticky;
  top: 0;
}
.att-grid tbody td {
  border-bottom: 1px solid var(--border-soft);
  vertical-align: middle;
  font-size: 14px;
}
.att-grid tbody tr:last-child td { border-bottom: none; }
.att-grid tbody tr:hover td { background: var(--bg); }
.att-cell {
  cursor: pointer;
  border-radius: var(--r-sm);
  transition: background 0.14s, transform 0.1s;
  font-size: 18px;
  min-width: 40px;
  height: 40px;
}
.att-cell:hover { background: var(--surface-2); transform: scale(1.15); }
.att-cell.att-attended { background: var(--sage-bg); }
.att-cell.att-missed   { background: var(--clay-bg); }
.att-cell.att-makeup   { background: var(--partial-bg); }
.att-cell.att-holiday-off { background: var(--holiday-bg); }
.att-cell.att-empty    { color: var(--ink-3); font-size: 13px; }

/* ─── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-3); }

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 900px) {
  :root { --sidebar-w: 200px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .main { padding: 16px 16px 60px; }
}

/* ─── Login Page ─────────────────────────────────────────── */
.login-page {
  position: fixed; inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9000;
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 48px 40px 40px;
  width: 380px;
  max-width: 95vw;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s ease;
}
.login-logo { text-align: center; margin-bottom: 36px; }
.login-brand {
  font-family: 'DM Serif Display', serif;
  font-size: 28px;
  color: var(--ink);
}
.login-sub {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-top: 4px;
}
.login-error {
  background: var(--refund-bg);
  color: var(--refund);
  border-radius: var(--r-sm);
  padding: 10px 14px;
  font-size: 13px;
  margin-top: 12px;
}

/* ─── Loading Screen ─────────────────────────────────────── */
.loading-screen {
  position: fixed; inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 8000;
}
.loading-card {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.loading-spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--sage);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-msg {
  font-size: 15px;
  color: var(--ink-2);
  font-family: 'DM Sans', sans-serif;
}