/**
 * Canopy Admin Dashboard Stylesheet (Phase 6)
 * Implements responsive container-query tables, accessible forms, and light-dismiss dialogs
 */

:root {
  --bg: #f4f7f6;
  --surface: #ffffff;
  --surface-alt: #eef3f1;
  --primary: #0d6e52;
  --primary-hover: #09523d;
  --primary-light: #e6f4ef;
  --text: #14241f;
  --text-muted: #52665e;
  --border: #d4e0db;
  --danger: #c92a2a;
  --danger-bg: #fff5f5;
  --warning: #b45309;
  --warning-bg: #fffbeb;
  --success: #0f766e;
  --success-bg: #f0fdfa;
  --focus-ring: #0b57d0;
  --radius: 0.625rem;
  --shadow: 0 2px 8px rgba(20, 36, 31, 0.06);
}

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

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text);
  background-color: var(--bg);
}

/* Accessible focus outlines (Forms guide Section 2) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

/* Navbar & Layout */
.admin-navbar {
  background: var(--primary);
  color: #ffffff;
  padding-block: 0.75rem;
  padding-inline: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  box-shadow: var(--shadow);
}

.admin-brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: #ffffff;
  text-decoration: none;
}

.admin-nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.admin-nav-links a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  padding: 0.5rem 0.875rem;
  border-radius: 0.375rem;
  font-weight: 500;
  font-size: 0.95rem;
  min-block-size: 40px;
  display: inline-flex;
  align-items: center;
}

.admin-nav-links a:hover,
.admin-nav-links a[aria-current="page"] {
  background: rgba(255, 255, 255, 0.18);
  color: #ffffff;
}

.admin-container {
  max-inline-size: 1280px;
  margin-inline: auto;
  padding-block: 1.75rem;
  padding-inline: 1.25rem;
}

.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-block-end: 1.5rem;
}

.page-header h1 {
  margin: 0;
  font-size: 1.6rem;
}

.page-subtitle {
  margin: 0.25rem 0 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Flash Banner */
.flash-banner {
  background: var(--primary-light);
  border-inline-start: 4px solid var(--primary);
  color: var(--text);
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius);
  margin-block-end: 1.5rem;
  font-weight: 500;
}

.flash-banner.error {
  background: var(--danger-bg);
  border-inline-start-color: var(--danger);
  color: var(--danger);
}

/* Stats Grid & Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-block-end: 1.75rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.stat-value {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text);
  margin-block: 0.35rem;
}

.stat-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-block-end: 1.5rem;
}

.card-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-block-end: 1rem;
  padding-block-end: 0.75rem;
  border-block-end: 1px solid var(--border);
}

.card-header h2 {
  margin: 0;
  font-size: 1.2rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 1.5rem;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-active,
.badge-completed {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid #99f6e4;
}

.badge-pending,
.badge-draft,
.badge-paused {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid #fde68a;
}

.badge-failed,
.badge-expired,
.badge-suspended,
.badge-opted_out {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid #fecaca;
}

/* Buttons (min 48px tap target on coarse pointers per Forms guide Section 5) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.625rem 1.125rem;
  min-block-size: 44px;
  border-radius: 0.45rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  background: var(--primary);
  color: #ffffff;
  transition: background-color 0.15s ease;
}

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

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--surface-alt);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  min-block-size: 36px;
  font-size: 0.85rem;
}

/* Forms (Forms guide Sections 1-5) */
fieldset {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-block-end: 1.25rem;
}

legend {
  font-weight: 700;
  padding-inline: 0.5rem;
  color: var(--text);
}

.form-group {
  margin-block-end: 1.25rem;
}

/* Gestalt Proximity Rule: label margin-block-end is smaller than .form-group margin */
.form-group label {
  display: block;
  font-weight: 600;
  margin-block-end: 0.35rem;
  color: var(--text);
}

.form-hint {
  display: block;
  font-size: 0.825rem;
  color: var(--text-muted);
  margin-block-start: 0.25rem;
}

.form-error {
  display: block;
  font-size: 0.85rem;
  color: var(--danger);
  margin-block-start: 0.25rem;
  font-weight: 600;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="date"],
input[type="search"],
select,
textarea {
  inline-size: 100%;
  font-size: 1rem;
  padding: 0.65rem 0.85rem;
  min-block-size: 48px;
  border: 1px solid var(--border);
  border-radius: 0.45rem;
  background: var(--surface);
  color: var(--text);
}

textarea {
  min-block-size: 110px;
  resize: vertical;
}

/* Non-intrusive invalid state styling (Forms guide Section 4) */
input:invalid:user-invalid,
textarea:invalid:user-invalid,
select:invalid:user-invalid {
  border-color: var(--danger);
  background-color: var(--danger-bg);
}

.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  margin-block-start: 0.35rem;
}

.radio-option {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 500;
  cursor: pointer;
  min-block-size: 40px;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 1rem;
  margin-block-end: 1.25rem;
}

.filter-bar .form-group {
  margin-block-end: 0;
  flex: 1 1 200px;
}

@media (pointer: coarse) {
  input, select, textarea, .btn {
    min-block-size: 48px;
  }
}

/* ============================================================================
 * Responsive Data Tables (responsive-table guide)
 * Uses sticky column/row headers and @container queries with accessible labels
 * ============================================================================ */
.table-wrapper {
  overflow: auto;
  max-inline-size: 100%;
  max-block-size: min(560px, 80vh);
  container-type: inline-size;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

table {
  inline-size: 100%;
  border-collapse: separate;
  border-spacing: 0;
  text-align: start;
}

thead {
  position: sticky;
  inset-block-start: 0;
  z-index: 1;
  background: var(--surface-alt);
}

th, td {
  padding: 0.85rem 1rem;
  border-block-end: 1px solid var(--border);
  vertical-align: middle;
}

thead th {
  font-size: 0.825rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  font-weight: 700;
  background: var(--surface-alt);
}

tbody th {
  position: sticky;
  inset-inline-start: 0;
  background: var(--surface);
  font-weight: 600;
}

tbody tr:hover td,
tbody tr:hover th {
  background: #f8fbfa;
}

@container (width < 600px) {
  table, thead, tbody, tr, th, td {
    display: block;
  }

  thead {
    /* MANDATORY: Hide column header from layout and screen readers */
    display: none;
  }

  tr {
    margin-block-end: 1.25rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    overflow: hidden;
  }

  tbody th {
    position: sticky;
    inset-block-start: 0;
    z-index: 2;
    background: var(--surface-alt);
  }

  td:nth-child(2)::before {
    content: var(--label-2) ": " / var(--label-2);
    font-weight: 600;
    color: var(--text-muted);
  }

  td:nth-child(3)::before {
    content: var(--label-3) ": " / var(--label-3);
    font-weight: 600;
    color: var(--text-muted);
  }

  td:nth-child(4)::before {
    content: var(--label-4) ": " / var(--label-4);
    font-weight: 600;
    color: var(--text-muted);
  }

  td:nth-child(5)::before {
    content: var(--label-5) ": " / var(--label-5);
    font-weight: 600;
    color: var(--text-muted);
  }

  td:nth-child(6)::before {
    content: var(--label-6) ": " / var(--label-6);
    font-weight: 600;
    color: var(--text-muted);
  }
}

/* ============================================================================
 * Light-Dismiss Modal Dialogs (light-dismiss-a-dialog guide)
 * ============================================================================ */
dialog {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-inline-size: 560px;
  inline-size: calc(100% - 2rem);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.18);
  background: var(--surface);
  color: var(--text);
}

dialog::backdrop {
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-block-end: 1rem;
  padding-block-end: 0.75rem;
  border-block-end: 1px solid var(--border);
}

.dialog-header h2 {
  margin: 0;
  font-size: 1.25rem;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-block-start: 1.25rem;
}

/* Login Box */
.auth-wrapper {
  min-block-size: 85dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  max-inline-size: 440px;
  inline-size: 100%;
  box-shadow: var(--shadow);
}