:root {
  color-scheme: dark;

  --color-bg: #0f1420;
  --color-bg-elevated: #161d2e;
  --color-surface: #1c2438;
  --color-surface-alt: #232c42;
  --color-border: #2e3850;
  --color-border-strong: #3d4a68;

  --color-text: #e6e9f2;
  --color-text-muted: #a3adc4;
  --color-text-faint: #6b7794;

  --color-primary: #5b8cff;
  --color-primary-hover: #7ba0ff;
  --color-primary-active: #4272e6;
  --color-primary-contrast: #041022;

  --color-success: #33c17a;
  --color-success-bg: rgba(51, 193, 122, 0.12);
  --color-warning: #e2b93b;
  --color-warning-bg: rgba(226, 185, 59, 0.12);
  --color-danger: #f2555a;
  --color-danger-bg: rgba(242, 85, 90, 0.12);
  --color-info: #4bc2e0;
  --color-info-bg: rgba(75, 194, 224, 0.12);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);

  --focus-ring: 0 0 0 3px rgba(91, 140, 255, 0.45);

  --transition-fast: 120ms ease;
  --transition-med: 220ms ease;
}

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

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img,
svg {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 var(--space-3);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-text);
}

h1 {
  font-size: 1.75rem;
}

h2 {
  font-size: 1.35rem;
}

h3 {
  font-size: 1.1rem;
}

p {
  margin: 0 0 var(--space-3);
  color: var(--color-text-muted);
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

button {
  font-family: inherit;
}

fieldset {
  border: none;
  margin: 0;
  padding: 0;
}

/* Focus visibility everywhere, keyboard-first */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  left: var(--space-3);
  top: var(--space-3);
}

/* ---------- App shell ---------- */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-5);
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.app-brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.app-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.app-nav a {
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.app-nav a:hover,
.app-nav a:focus-visible {
  color: var(--color-text);
  background: var(--color-surface);
  text-decoration: none;
}

.app-nav a[aria-current="page"] {
  color: var(--color-primary);
  font-weight: 600;
}

.app-main {
  flex: 1;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: var(--space-5);
}

@media (max-width: 640px) {
  .app-header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
  }

  .app-main {
    padding: var(--space-4);
  }
}

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

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.spread {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

/* ---------- Cards ---------- */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}

.card + .card {
  margin-top: var(--space-4);
}

.card-title {
  margin-bottom: var(--space-2);
}

.auth-card {
  max-width: 380px;
  margin: var(--space-7) auto;
}

/* ---------- Forms ---------- */

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}

.field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.field-hint {
  font-size: 0.8rem;
  color: var(--color-text-faint);
}

input,
select,
textarea {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-faint);
}

input:hover,
select:hover,
textarea:hover {
  border-color: var(--color-primary);
}

input:disabled,
select:disabled,
textarea:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

form {
  display: block;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--color-surface-alt);
  color: var(--color-text);
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.btn:hover {
  background: var(--color-border);
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn-primary:active {
  background: var(--color-primary-active);
}

.btn-danger {
  background: transparent;
  color: var(--color-danger);
  border-color: var(--color-danger);
}

.btn-danger:hover {
  background: var(--color-danger-bg);
}

.btn-ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text-muted);
}

.btn-ghost:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: 0.82rem;
}

.btn-block {
  width: 100%;
}

/* ---------- Status / feedback ---------- */

.status-message {
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  font-size: 0.88rem;
}

.status-message:empty {
  display: none;
}

.status-message.is-error {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border: 1px solid rgba(242, 85, 90, 0.35);
}

.status-message.is-success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid rgba(51, 193, 122, 0.35);
}

.status-message.is-info {
  background: var(--color-info-bg);
  color: var(--color-info);
  border: 1px solid rgba(75, 194, 224, 0.35);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: capitalize;
  background: var(--color-surface-alt);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.badge-success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border-color: rgba(51, 193, 122, 0.35);
}

.badge-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border-color: rgba(226, 185, 59, 0.35);
}

.badge-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border-color: rgba(242, 85, 90, 0.35);
}

.badge-info {
  background: var(--color-info-bg);
  color: var(--color-info);
  border-color: rgba(75, 194, 224, 0.35);
}

/* ---------- Empty / loading / error states ---------- */

.state-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  text-align: center;
  padding: var(--space-6) var(--space-4);
  color: var(--color-text-muted);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
}

.state-block.is-error {
  border-color: rgba(242, 85, 90, 0.4);
  color: var(--color-danger);
}

.spinner {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--color-border-strong);
  border-top-color: var(--color-primary);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

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

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

thead th {
  text-align: left;
  padding: var(--space-3);
  background: var(--color-bg-elevated);
  color: var(--color-text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

tbody td {
  padding: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: var(--color-surface-alt);
}

/* ---------- Pagination ---------- */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.pagination-info {
  color: var(--color-text-faint);
  font-size: 0.85rem;
}

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

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}

.dashboard-tile {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.dashboard-tile:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.dashboard-tile h3 {
  margin: 0;
}

.dashboard-tile p {
  margin: 0;
  font-size: 0.88rem;
}

.profile-summary {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.profile-summary dt {
  color: var(--color-text-faint);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.profile-summary dd {
  margin: 0 0 var(--space-2);
  color: var(--color-text);
}

/* ---------- Modal (used by rooms/bookings/users pages) ---------- */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 8, 16, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  z-index: 50;
}

.modal {
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-lg);
}

/* ---------- Filters toolbar ---------- */

.toolbar {
  display: flex;
  align-items: flex-end;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.toolbar .field {
  margin-bottom: 0;
  min-width: 160px;
}

/* ---------- Utility ---------- */

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

.text-faint {
  color: var(--color-text-faint);
}

.text-danger {
  color: var(--color-danger);
}

.mt-0 {
  margin-top: 0;
}

.mb-0 {
  margin-bottom: 0;
}