:root {
  --bg: #f4f7f8;
  --surface: #ffffff;
  --ink: #172528;
  --muted: #66777b;
  --line: #dce7e7;
  --accent: #00a88f;
  --accent-dark: #087a70;
  --accent-soft: #def4f0;
  --danger: #b4232f;
  --warning: #a15c00;
  --shadow: 0 18px 50px rgba(23, 37, 40, 0.08);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px 1fr;
}

.sidebar {
  background: #17363a;
  color: #f8ffff;
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 850;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--accent);
}

.nav-list {
  display: grid;
  gap: 6px;
}

.nav-item {
  min-height: 44px;
  border-radius: 8px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  color: #d5e8e6;
}

.nav-item:hover,
.nav-item.is-active {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.nav-item.is-muted {
  color: rgba(213, 232, 230, 0.52);
}

.logout-link {
  margin-top: auto;
  min-height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.08);
}

.workspace {
  padding: 30px;
}

.auth-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: var(--bg);
}

.auth-card {
  width: min(460px, 100%);
  padding: 30px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.auth-card h1,
.page-head h1 {
  margin: 0;
  font-size: 30px;
}

.auth-card p,
.page-head p {
  margin: 8px 0 0;
  color: var(--muted);
}

.page-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 22px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.panel-pad {
  padding: 22px;
}

.grid {
  display: grid;
  gap: 16px;
}

.stats-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 20px;
}

.stat {
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 8px;
}

.stat strong {
  font-size: 26px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.wide {
  grid-column: 1 / -1;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 750;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 12px;
  color: var(--ink);
  background: #fbfdfd;
  outline: none;
}

textarea {
  min-height: 92px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 168, 143, 0.12);
}

.button-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 18px;
}

.button,
button {
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  cursor: pointer;
}

.button-primary {
  background: var(--accent);
  color: #ffffff;
}

.button-primary:hover {
  background: var(--accent-dark);
}

.button-secondary {
  background: #ffffff;
  border-color: var(--line);
}

.button-danger {
  background: #fff3f4;
  border-color: #ffd6da;
  color: var(--danger);
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.table th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

.table tr:last-child td {
  border-bottom: 0;
}

.row-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.empty-state {
  padding: 36px;
  color: var(--muted);
  text-align: center;
}

.flash,
.alert {
  margin-bottom: 18px;
  padding: 12px 14px;
  border-radius: 8px;
}

.flash {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.alert {
  background: #fff2df;
  color: var(--warning);
}

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

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    min-height: auto;
  }

  .stats-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }
}