:root {
  --bg: #eef4fb;
  --card: #ffffff;
  --text: #23324a;
  --muted: #64748b;
  --accent: #3d7ef2;
  --accent-dark: #1e4fa8;
  --stripe: #16233d;
  --border: #cfe0f7;
  --good: #4caf6f;
  --good-dark: #2e7d4f;
  --bad: #e8615b;
  --bad-dark: #c0402f;
  --font-heading: "Baloo 2", "Nunito", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  --font-body: "Nunito", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  background:
    radial-gradient(circle at 1px 1px, rgba(61, 126, 242, 0.10) 1px, transparent 1.6px) 0 0 / 26px 26px,
    var(--bg);
  color: var(--text);
  line-height: 1.55;
}

/* ---------- шапка ---------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 22px 30px;
  background: linear-gradient(135deg, #5c93f5 0%, #3d7ef2 60%, #2e63d6 100%);
  flex-wrap: wrap;
  gap: 10px;
  position: relative;
  box-shadow: 0 2px 0 var(--stripe);
}

.topbar::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 14px;
  background-image:
    linear-gradient(-45deg, var(--bg) 7px, transparent 0),
    linear-gradient(45deg, var(--bg) 7px, transparent 0);
  background-position: left bottom;
  background-repeat: repeat-x;
  background-size: 14px 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #fff;
}

.brand-icon {
  font-size: 2rem;
  line-height: 1;
  filter: drop-shadow(0 1px 1px rgba(0, 0, 0, 0.2));
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  color: #fff;
}

.brand-sub {
  font-size: 0.78rem;
  font-weight: 700;
  color: #dbe8ff;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.topbar nav {
  display: flex;
  gap: 4px;
}

.topbar nav a {
  padding: 7px 14px;
  border-radius: 999px;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  transition: background 0.15s ease, color 0.15s ease;
}

.topbar nav a:hover {
  background: rgba(255, 255, 255, 0.22);
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 28px 20px 40px;
}

footer {
  text-align: center;
  padding: 20px 24px 32px;
  font-size: 0.82rem;
}

.footer-icon {
  display: block;
  font-size: 1.3rem;
  margin-bottom: 6px;
}

footer a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px dashed var(--border);
}
footer a:hover { color: var(--accent-dark); }

h1, h2 {
  font-family: var(--font-heading);
  color: var(--accent-dark);
}
h1 { font-size: 1.55rem; margin-bottom: 4px; }
h2 { font-size: 1.2rem; margin-top: 30px; display: flex; align-items: center; gap: 6px; }

/* ---------- быстрые кнопки взнос/расход ---------- */

.quick-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 20px 0;
}

.quick-action {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 3px 0 var(--border);
  overflow: hidden;
}

.quick-action summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 18px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
  user-select: none;
}
.quick-action summary::-webkit-details-marker { display: none; }

.quick-action-in summary { background: linear-gradient(135deg, #4caf6f, #2e7d4f); }
.quick-action-out summary { background: linear-gradient(135deg, #f0847e, #e8615b); }

.quick-action[open] summary { border-bottom: 2px solid var(--border); }

.quick-action .form-grid {
  margin: 14px 18px 18px;
  max-width: none;
}

/* ---------- карточки ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin: 20px 0;
}

.card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 16px 18px;
  box-shadow: 0 3px 0 var(--border);
}

.card .label { color: var(--muted); font-size: 0.85rem; font-weight: 700; }
.card .value {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  margin-top: 4px;
  color: var(--stripe);
}
.card .value.good { color: var(--good-dark); }
.card .value.bad { color: var(--bad-dark); }

.card .subvalues {
  display: flex;
  gap: 18px;
  margin-top: 6px;
}
.card .subvalue-label {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}
.card .subvalue {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--stripe);
}

.card a {
  color: var(--accent-dark);
  text-decoration: none;
  font-weight: 700;
  font-family: var(--font-heading);
  font-size: 1.05rem;
}
.card a:hover { color: var(--stripe); }

/* ---------- таблицы ---------- */

.table-scroll {
  overflow-x: auto;
  border-radius: 12px;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

th, td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  font-size: 0.93rem;
}

th:last-child, td:last-child { border-right: none; }

th {
  background: linear-gradient(180deg, #dce9fb, #c7dcf7);
  color: var(--stripe);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  border-right: 1px solid #b9d3f2;
}

tr:last-child td { border-bottom: none; }
tbody tr:nth-child(even) td { background: #f6faff; }
tbody tr:hover td { background: #eaf2ff; }

td.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }

.students-table td:nth-child(1) { min-width: 160px; }
.students-table td:nth-child(5) { min-width: 200px; }

.status-ok { color: var(--good-dark); font-weight: 700; }
.status-ok::before { content: "✅ "; }
.status-no { color: var(--bad-dark); font-weight: 700; }
.status-no::before { content: "⏳ "; }
.muted { color: var(--muted); }

.progress {
  background: var(--border);
  border-radius: 999px;
  height: 10px;
  overflow: hidden;
  margin-top: 6px;
}
.progress > div {
  background: linear-gradient(90deg, #5c93f5, #2e63d6);
  height: 100%;
  border-radius: 999px;
}

/* ---------- формы ---------- */

form.inline { display: inline; }

.form-grid {
  display: grid;
  gap: 10px;
  max-width: 480px;
  margin: 14px 0 24px;
}

.form-grid input, .form-grid select, .form-grid textarea {
  padding: 10px 12px;
  border: 2px solid var(--border);
  border-radius: 10px;
  font-size: 16px; /* держать >=16px, иначе iOS Safari зумит страницу при фокусе */
  font-family: var(--font-body);
  background: var(--card);
  color: var(--text);
  width: 100%;
}
.form-grid input:focus, .form-grid select:focus, .form-grid textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-grid-balance { grid-template-columns: 1fr auto; align-items: center; }
.form-grid-contribution { grid-template-columns: 1fr 1fr; max-width: 100%; }
.form-grid-contribution .span-2 { grid-column: span 2; }
.form-grid-budget-row { grid-template-columns: 2fr 1fr 1fr auto; max-width: 100%; align-items: center; margin: 6px 0; }

button, .btn {
  background: linear-gradient(180deg, #5c93f5, #3d7ef2);
  color: #fff;
  border: none;
  padding: 9px 18px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 700;
  font-family: var(--font-heading);
  box-shadow: 0 2px 0 var(--accent-dark);
  transition: transform 0.08s ease;
  text-decoration: none;
  display: inline-block;
}
button:hover, .btn:hover { filter: brightness(1.05); }
button:active, .btn:active { transform: translateY(1px); box-shadow: 0 1px 0 var(--accent-dark); }
button.danger {
  background: linear-gradient(180deg, #f0847e, #e8615b);
  color: #fff;
  box-shadow: 0 2px 0 var(--bad-dark);
}

.admin-nav { margin-bottom: 20px; }
.admin-nav a { margin-right: 14px; }

.notice {
  background: #eef6ee;
  border: 2px solid var(--good);
  color: #2f5f2f;
  padding: 10px 14px;
  border-radius: 12px;
  margin-bottom: 16px;
  white-space: pre-wrap;
}

.hint { color: var(--muted); font-size: 0.85rem; margin-top: -6px; margin-bottom: 10px; }

/* ---------- мобильная версия ---------- */

@media (max-width: 640px) {
  main { padding: 18px 12px 32px; }

  .topbar { padding: 12px 14px 24px; gap: 8px; }
  .brand-icon { font-size: 1.6rem; }
  .brand-title { font-size: 1.02rem; }
  .brand-sub { font-size: 0.68rem; }
  .topbar nav { gap: 2px; }
  .topbar nav a { padding: 6px 10px; font-size: 0.85rem; }

  h1 { font-size: 1.3rem; }
  h2 { font-size: 1.05rem; margin-top: 22px; }

  .quick-action summary { padding: 13px 14px; font-size: 1rem; }
  .quick-action .form-grid { margin: 12px 14px 14px; }

  .card { padding: 13px 14px; }
  .card .value { font-size: 1.35rem; }
  .card .subvalues { gap: 12px; flex-wrap: wrap; }

  th, td { padding: 8px 10px; font-size: 0.85rem; }

  .form-grid-balance,
  .form-grid-contribution,
  .form-grid-budget-row {
    grid-template-columns: 1fr;
  }
  .form-grid-contribution .span-2 { grid-column: span 1; }

  .form-grid button { width: 100%; padding: 11px 18px; }
  a.btn { display: block; text-align: center; padding: 11px 18px; }
  .admin-nav a { display: inline-block; margin-bottom: 6px; }
}