:root {
  color-scheme: light;
  --font-base: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-display: "Segoe UI Semibold", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --color-page: #eef2f9;
  --color-surface: #ffffff;
  --color-surface-alt: #f6f8fd;
  --color-border: #dbe4f1;
  --color-border-strong: #c3d1e6;
  --color-text: #1f2937;
  --color-muted: #60708d;
  --color-primary: #1c64f2;
  --color-primary-dark: #1a56db;
  --color-primary-muted: rgba(28, 100, 242, 0.12);
  --color-danger: #e63b3b;
  --color-success: #1c8f6f;
  --color-warning: #f59e0b;
  --radius-sm: 6px;
  --radius-md: 12px;
  --shadow-sm: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 18px 48px rgba(15, 23, 42, 0.12);
  --transition-fast: 0.18s ease-in-out;
}

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

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background: radial-gradient(circle at top right, rgba(28, 100, 242, 0.08), transparent 55%),
    radial-gradient(circle at bottom left, rgba(28, 100, 242, 0.06), transparent 50%),
    var(--color-page);
  min-height: 100vh;
}

main {
  padding: 2.5rem;
  max-width: 1240px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(135deg, #0f172a, #1c64f2);
  color: #fff;
  padding: 1.25rem 2.5rem;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 0.015em;
}

.user-info {
  display: flex;
  gap: 1rem;
  align-items: center;
  font-weight: 500;
}

.user-info span {
  background: rgba(15, 23, 42, 0.35);
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
}

.inline-form {
  display: inline;
}

.inline-form button {
  border: none;
  padding: 0.45rem 1rem;
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.inline-form button:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: translateY(-1px);
}

.layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  align-items: start;
  gap: 2rem;
  min-height: calc(100vh - 160px);
  /* Make the sidebar flush with the page edges by canceling main padding */
  margin-left: -2.5rem;
  margin-right: -2.5rem;
}

.sidebar {
  background: var(--color-surface);
  padding: 1.75rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  position: sticky;
  top: 7.5rem; /* match main padding to avoid jump on scroll */
}

.sidebar a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-muted);
  padding: 0.6rem 1rem 0.6rem 1.45rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast), background var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.sidebar a::before {
  content: "";
  position: absolute;
  left: 0.55rem;
  top: 0.45rem;
  bottom: 0.45rem;
  width: 4px;
  border-radius: 4px;
  background: transparent;
  transition: background var(--transition-fast);
}

.sidebar a:hover {
  background: var(--color-primary-muted);
  color: var(--color-primary);
}

.sidebar a:hover::before {
  background: rgba(28, 100, 242, 0.5);
}

.sidebar a.active {
  color: var(--color-primary);
  background: rgba(28, 100, 242, 0.14);
  box-shadow: inset 0 0 0 1px rgba(28, 100, 242, 0.14);
}

.sidebar a.active::before {
  background: var(--color-primary);
}

.card {
  background: var(--color-surface);
  padding: 1.75rem 1.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
}

.card h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: inset 0 -1px 0 var(--color-border);
}

.table thead th {
  text-align: left;
  padding: 0.9rem 1rem;
  background: rgba(15, 23, 42, 0.04);
  color: var(--color-muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}

.table tbody td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.table tbody tr:nth-child(even) {
  background: rgba(15, 23, 42, 0.02);
}

.table tbody tr:hover {
  background: rgba(28, 100, 242, 0.08);
}

.table-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.table-actions a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.table-actions a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.flash {
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  border: 1px solid transparent;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.flash.success {
  background: rgba(28, 143, 111, 0.12);
  border-color: rgba(28, 143, 111, 0.25);
  color: var(--color-success);
}

.flash.error {
  background: rgba(230, 59, 59, 0.12);
  border-color: rgba(230, 59, 59, 0.25);
  color: var(--color-danger);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.45rem;
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.76rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font: inherit;
  color: var(--color-text);
  background: #fff;
  transition: border var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group select[multiple] {
  min-height: 140px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(28, 100, 242, 0.2);
}

button.primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border: none;
  padding: 0.6rem 1.4rem;
  color: #fff;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 8px 20px rgba(28, 100, 242, 0.25);
}

button.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(28, 100, 242, 0.3);
}

button.primary:focus-visible {
  outline: 3px solid rgba(28, 100, 242, 0.5);
  outline-offset: 3px;
}

.table caption {
  caption-side: bottom;
  padding: 0.75rem;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: rgba(15, 23, 42, 0.38);
  z-index: 1000;
}

.modal.is-open {
  display: flex;
}

.modal__overlay {
  position: absolute;
  inset: 0;
}

.modal__dialog {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 2rem 2.25rem;
  width: min(520px, 96vw);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-strong);
  max-height: 90vh;
  overflow-y: auto;
}

.modal__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.modal__header h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.modal__close {
  background: rgba(15, 23, 42, 0.08);
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--color-muted);
  border-radius: 999px;
  padding: 0.3rem 0.65rem;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.modal__close:hover {
  background: rgba(28, 100, 242, 0.1);
  color: var(--color-primary);
}

.modal__body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.modal__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.modal__secondary {
  background: rgba(15, 23, 42, 0.08);
  border: none;
  color: var(--color-muted);
  cursor: pointer;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  font-weight: 600;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.modal__secondary:hover {
  background: rgba(28, 100, 242, 0.12);
  color: var(--color-primary);
}

.modal__link {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.modal__link:hover {
  text-decoration: underline;
}

body.modal-open {
  overflow: hidden;
}

@media (max-width: 1100px) {
  main {
    padding: 2rem;
  }

  .layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .sidebar a {
    flex: 1 1 45%;
    white-space: unset;
  }
}

@media (max-width: 720px) {
  main {
    padding: 1.5rem;
  }

  .topbar {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
    padding: 1.25rem 1.5rem;
  }

  .user-info {
    width: 100%;
    justify-content: space-between;
  }

  .card {
    padding: 1.5rem;
  }

  .modal__dialog {
    padding: 1.5rem;
  }
}
.footer {
  max-width: 1240px;
  margin: 0 auto 2rem;
  padding: 0 2.5rem;
  font-size: 0.85rem;
  color: var(--color-muted);
  text-align: center;
}