@import url("/css/tokens.css");

/* ==========================================================================
   Base CSS Reset & Modern Defaults
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  color-scheme: light dark;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--bg-app);
  background-image:
    radial-gradient(circle at 15% 15%, rgba(15, 118, 110, 0.08), transparent 35%),
    radial-gradient(circle at 85% 35%, rgba(3, 105, 161, 0.09), transparent 35%),
    radial-gradient(circle at 50% 90%, rgba(180, 83, 9, 0.06), transparent 40%),
    linear-gradient(145deg, var(--bg-gradient-start) 0%, var(--bg-gradient-mid) 50%, var(--bg-gradient-end) 100%);
  color: var(--text-primary);
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: 1.5;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

body.modal-open {
  overflow: hidden;
}

/* Background animated matrix drift */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: var(--z-canvas);
  pointer-events: none;
  background-image:
    linear-gradient(rgba(15, 118, 110, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 118, 110, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.8) 0%, transparent 80%);
  animation: gridDrift 24s linear infinite;
}

/* Three.js / Canvas overlay */
.hyper-scene {
  position: fixed;
  inset: 0;
  z-index: var(--z-canvas);
  pointer-events: none;
  opacity: 0.75;
  transition: opacity var(--transition-smooth);
}

[data-theme="dark"] .hyper-scene {
  opacity: 0.45;
}

/* ==========================================================================
   Layout Containers & Safe Areas
   ========================================================================== */

.app-container {
  width: 100%;
  max-width: var(--container-max-w-desktop);
  margin: 0 auto;
  padding-left: max(var(--space-4), var(--safe-left));
  padding-right: max(var(--space-4), var(--safe-right));
  padding-top: max(var(--space-4), var(--safe-top));
  padding-bottom: max(var(--space-6), var(--safe-bottom));
}

.page-shell {
  width: 100%;
  max-width: var(--container-max-w-form);
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--space-8) var(--space-4);
  position: relative;
  z-index: var(--z-base);
}

.page-shell.compact {
  max-width: 480px;
}

/* Navbar / Top Bar */
.top-nav {
  width: 100%;
  max-width: var(--container-max-w-desktop);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--surface-panel);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: var(--font-size-base);
}

.brand-badge {
  background: var(--primary);
  color: var(--text-inverse);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

/* Theme Switcher Button */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--border-line);
  background: var(--surface-card);
  color: var(--text-primary);
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: 1.15rem;
  transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle-btn:hover {
  transform: scale(1.05);
  border-color: var(--primary);
}

/* Command Palette Trigger Button */
.search-trigger-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0 var(--space-3);
  border: 1px solid var(--border-line);
  background: var(--surface-card);
  color: var(--text-muted);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.search-trigger-btn:hover {
  border-color: var(--primary);
  color: var(--text-primary);
}

.kbd-shortcut {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px 6px;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  background: var(--surface-subtle);
  color: var(--text-muted);
  font-family: var(--font-family-mono);
  font-size: 0.72rem;
}

/* ==========================================================================
   Panel & Card Components
   ========================================================================== */

.registration-panel {
  width: 100%;
  background: var(--surface-panel);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-panel);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  animation: panelEnter 600ms cubic-bezier(0.16, 1, 0.3, 1) both;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

@media (hover: hover) and (pointer: fine) {
  .registration-panel:hover {
    border-color: rgba(15, 118, 110, 0.4);
    box-shadow: 0 30px 80px rgba(15, 23, 42, 0.14);
    transform: translateY(-2px);
  }
}

.event-kicker {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border: 1px solid var(--primary-subtle);
  border-radius: var(--radius-full);
  padding: 0 var(--space-3);
  background: var(--primary-subtle);
  color: var(--primary-text);
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
  max-width: var(--container-max-w-prose);
}

.lede {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  max-width: var(--container-max-w-prose);
}

.event-summary {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.event-summary span {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
  background: var(--surface-card);
  color: var(--text-secondary);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

/* ==========================================================================
   Form & Input System (iOS Safari Auto-Zoom Immunity & 44px Hit Targets)
   ========================================================================== */

.form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 0;
}

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

label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

label span {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  font-weight: 400;
}

/* CRITICAL: Enforce 16px font-size to permanently prevent iOS Safari auto-zoom */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
input[type="search"],
select,
textarea {
  width: 100%;
  min-height: 48px; /* Safe Apple 44px+ HIG Target */
  padding: var(--space-3) var(--space-4);
  font-size: 16px !important; /* Prevents iOS Safari Zoom */
  font-family: inherit;
  color: var(--text-primary);
  background-color: var(--surface-canvas);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

input::placeholder,
textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='M8 11.5l-5-5h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

/* Focus Visible States */
:focus-visible {
  outline: 2px solid var(--ring-focus) !important;
  outline-offset: var(--ring-offset) !important;
  box-shadow: var(--ring-focus-shadow) !important;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  border-color: var(--primary) !important;
}

/* Checkbox & Multi-Event Selection Grid */
.event-choice-group {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  background: var(--surface-card);
}

.event-choice-group legend {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--text-primary);
  padding: 0 var(--space-2);
}

.event-choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.event-choice {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 48px; /* 44px+ hit area */
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  background: var(--surface-canvas);
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
  user-select: none;
  transition: all var(--transition-fast);
}

.event-choice:hover {
  border-color: var(--primary);
  background: var(--primary-subtle);
}

.event-choice input[type="checkbox"] {
  width: 20px;
  height: 20px;
  min-height: 20px;
  accent-color: var(--primary);
  cursor: pointer;
}

.event-choice:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-subtle);
  color: var(--primary-text);
  font-weight: 600;
}

/* ==========================================================================
   Buttons & Links
   ========================================================================== */

button,
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px; /* 44px+ Touch Target */
  padding: var(--space-3) var(--space-6);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

button[type="submit"],
.button-primary {
  background-color: var(--primary);
  color: var(--text-inverse);
  box-shadow: 0 4px 12px rgba(15, 118, 110, 0.3);
}

button[type="submit"]:hover:not(:disabled),
.button-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
  box-shadow: 0 6px 16px rgba(15, 118, 110, 0.4);
  transform: translateY(-1px);
}

button[type="submit"]:active:not(:disabled),
.button-primary:active:not(:disabled) {
  background-color: var(--primary-active);
  transform: translateY(0);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.secondary-button,
.button-secondary {
  background-color: var(--surface-card);
  color: var(--text-primary);
  border-color: var(--border-line);
}

.secondary-button:hover,
.button-secondary:hover {
  background-color: var(--surface-subtle);
  border-color: var(--border-strong);
}

.form button[type="submit"] {
  grid-column: 1 / -1;
  margin-top: var(--space-2);
  font-size: var(--font-size-lg);
  min-height: 52px;
}

/* Spinner icon inside loading button */
.btn-spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ==========================================================================
   Alerts & Notifications
   ========================================================================== */

.alert {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-6);
  font-size: var(--font-size-sm);
  line-height: 1.4;
  border: 1px solid var(--color-danger-border);
  background-color: var(--color-danger-bg);
  color: var(--color-danger-text);
  animation: alertPop 300ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.alert p + p {
  margin-top: var(--space-2);
}

.alert.note-alert {
  border-color: var(--color-info-border);
  background-color: var(--color-info-bg);
  color: var(--color-info-text);
}

.client-error {
  grid-column: 1 / -1;
  color: var(--color-danger-text);
  font-size: var(--font-size-sm);
  font-weight: 600;
  min-height: 20px;
}

/* ==========================================================================
   Toast Notification Floating System
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: max(var(--space-6), var(--safe-bottom));
  right: max(var(--space-6), var(--safe-right));
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: min(420px, calc(100vw - 32px));
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--surface-panel-solid);
  border: 1px solid var(--border-line);
  color: var(--text-primary);
  box-shadow: var(--shadow-xl);
  pointer-events: auto;
  animation: toastIn 300ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.toast-exiting {
  animation: toastOut 250ms ease-in forwards;
}

.toast-content {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.toast-icon {
  font-size: 1.1rem;
  font-weight: 700;
}

.toast-success {
  border-left: 4px solid #10b981;
}

.toast-error {
  border-left: 4px solid #ef4444;
}

.toast-info {
  border-left: 4px solid #0ea5e9;
}

.toast-close {
  background: transparent;
  border: none;
  min-height: auto;
  padding: var(--space-1);
  color: var(--text-muted);
  font-size: 1.25rem;
  cursor: pointer;
  line-height: 1;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateY(10px) scale(0.95);
  }
}

/* ==========================================================================
   Command Palette Overlay (Cmd+K)
   ========================================================================== */

.command-palette-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-command-palette);
  background: var(--surface-overlay);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: calc(var(--safe-top) + 80px) var(--space-4) var(--space-4);
}

.command-palette-overlay.is-active {
  display: flex;
}

.command-palette-modal {
  width: 100%;
  max-width: 640px;
  background: var(--surface-panel-solid);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2xl);
  overflow: hidden;
  animation: paletteIn 200ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.palette-search-bar {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  gap: var(--space-3);
}

.palette-search-bar input {
  border: none !important;
  box-shadow: none !important;
  background: transparent !important;
  padding: 0 !important;
  min-height: 40px !important;
  font-size: var(--font-size-base) !important;
}

.palette-results {
  max-height: 360px;
  overflow-y: auto;
  padding: var(--space-2);
}

.palette-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  text-decoration: none;
  cursor: pointer;
  font-size: var(--font-size-sm);
  transition: background-color var(--transition-fast);
}

.palette-item:hover,
.palette-item.is-selected {
  background: var(--primary-subtle);
  color: var(--primary-text);
}

.palette-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-4);
  background: var(--surface-subtle);
  border-top: 1px solid var(--border-subtle);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

@keyframes paletteIn {
  from {
    opacity: 0;
    transform: scale(0.96) translateY(-10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* ==========================================================================
   Admin Desk Multi-Pane Layout
   ========================================================================== */

.admin-shell {
  width: 100%;
  max-width: var(--container-max-w-desktop);
  margin: 0 auto;
  padding: var(--space-4) max(var(--space-4), var(--safe-left)) var(--space-8) max(var(--space-4), var(--safe-right));
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.admin-header h1 {
  font-size: var(--font-size-3xl);
}

.admin-header p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

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

/* Multi-Pane Grid */
.admin-grid-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-6);
  align-items: start;
}

.admin-sidebar {
  position: sticky;
  top: 80px;
  background: var(--surface-panel);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.filter-group h3 {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.filter-chip-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.filter-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-fast);
}

.filter-chip:hover {
  background: var(--surface-subtle);
}

.filter-chip.is-active {
  background: var(--primary-subtle);
  color: var(--primary-text);
  font-weight: 600;
  border-color: var(--primary);
}

.chip-count {
  font-size: var(--font-size-xs);
  background: var(--surface-card);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-line);
}

/* Table Card Wrap */
.table-card {
  background: var(--surface-panel);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}

.table-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  gap: var(--space-3);
  flex-wrap: wrap;
}

.table-search-input {
  max-width: 320px;
  min-height: 40px !important;
}

.table-wrap {
  overflow-x: auto;
  width: 100%;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 800px;
}

th,
td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  font-size: var(--font-size-sm);
}

th {
  background: var(--surface-subtle);
  color: var(--text-secondary);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  position: sticky;
  top: 0;
  z-index: 10;
}

tbody tr {
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

@media (hover: hover) and (pointer: fine) {
  tbody tr:hover {
    background-color: var(--primary-subtle);
  }
}

.badge-tag {
  display: inline-flex;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--surface-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-line);
}

.badge-student {
  background: var(--accent-sky-subtle);
  color: var(--accent-sky);
  border-color: rgba(3, 105, 161, 0.3);
}

.badge-christ {
  background: var(--primary-subtle);
  color: var(--primary-text);
  border-color: rgba(15, 118, 110, 0.3);
}

.badge-guest {
  background: var(--accent-gold-subtle);
  color: var(--accent-gold);
  border-color: rgba(180, 83, 9, 0.3);
}

/* ==========================================================================
   Slide-Over Attendee Detail Drawer
   ========================================================================== */

.attendee-drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  display: none;
  justify-content: flex-end;
  background: var(--surface-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.attendee-drawer.is-active {
  display: flex;
}

.drawer-panel {
  width: 100%;
  max-width: 480px;
  height: 100%;
  background: var(--surface-drawer);
  border-left: 1px solid var(--border-line);
  box-shadow: var(--shadow-2xl);
  display: flex;
  flex-direction: column;
  padding: max(var(--space-6), var(--safe-top)) var(--space-6) max(var(--space-6), var(--safe-bottom));
  overflow-y: auto;
  animation: drawerSlide 300ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-6);
}

.drawer-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
}

.drawer-close-btn {
  background: transparent;
  border: none;
  min-height: 44px;
  min-width: 44px;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.drawer-close-btn:hover {
  color: var(--text-primary);
}

@keyframes drawerSlide {
  from {
    transform: translateX(100%);
  }
  to {
    transform: translateX(0);
  }
}

/* ==========================================================================
   Success & Details Display Page
   ========================================================================== */

.details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin: var(--space-6) 0;
}

.details div {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  background: var(--surface-card);
}

.details dt {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.details dd {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text-primary);
  overflow-wrap: anywhere;
}

.wifi-card {
  margin: var(--space-6) 0;
  padding: var(--space-5);
  border: 1px solid var(--primary);
  border-radius: var(--radius-lg);
  background: var(--primary-subtle);
}

.wifi-card h3 {
  color: var(--primary-text);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-1);
}

.wifi-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.wifi-grid div {
  padding: var(--space-3);
  border: 1px solid rgba(15, 118, 110, 0.2);
  border-radius: var(--radius-md);
  background: var(--surface-canvas);
}

.wifi-grid span {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
}

.wifi-grid strong {
  display: block;
  font-size: var(--font-size-base);
  color: var(--text-primary);
  margin-top: 2px;
  overflow-wrap: anywhere;
}

/* ==========================================================================
   Responsive Breakpoints & Density Scaling
   ========================================================================== */

/* Laptop Grid Optimization (1025px - 1366px) */
@media (max-width: 1366px) {
  .app-container {
    max-width: var(--container-max-w-laptop);
  }

  .admin-grid-layout {
    grid-template-columns: 240px 1fr;
    gap: var(--space-4);
  }
}

/* Tablet (681px - 1024px) */
@media (max-width: 1024px) {
  .admin-grid-layout {
    grid-template-columns: 1fr;
  }

  .admin-sidebar {
    position: static;
    max-height: none;
  }

  .filter-chip-list {
    flex-direction: row;
    flex-wrap: wrap;
  }
}

/* Mobile Screens (<= 680px) */
@media (max-width: 680px) {
  .page-shell {
    padding: var(--space-3) var(--space-2);
    min-height: auto;
  }

  .registration-panel {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
  }

  .form {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .field,
  .field-wide,
  .form button {
    grid-column: span 1;
  }

  .event-choice-grid {
    grid-template-columns: 1fr;
  }

  .details {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .wifi-grid {
    grid-template-columns: 1fr;
  }

  .admin-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .admin-actions {
    width: 100%;
  }

  .admin-actions .button-link,
  .admin-actions form,
  .admin-actions button {
    width: 100%;
  }

  .table-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .table-search-input {
    max-width: 100%;
  }

  /* Transform table to readable card list on mobile */
  .table-wrap {
    overflow: visible;
  }

  table,
  thead,
  tbody,
  tr,
  td {
    display: block;
    width: 100%;
  }

  table {
    min-width: 0;
  }

  thead {
    display: none;
  }

  tbody tr {
    margin-bottom: var(--space-3);
    border: 1px solid var(--border-line);
    border-radius: var(--radius-md);
    background: var(--surface-card);
    overflow: hidden;
  }

  td {
    display: grid;
    grid-template-columns: minmax(110px, 35%) 1fr;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-bottom: 1px solid var(--border-subtle);
  }

  td::before {
    content: attr(data-label);
    color: var(--text-muted);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
  }

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

/* Tiny Mobile (<= 380px) */
@media (max-width: 380px) {
  .registration-panel {
    padding: var(--space-3);
  }

  td {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}

/* Animations */
@keyframes panelEnter {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes gridDrift {
  from {
    background-position: 0 0, 0 0;
  }
  to {
    background-position: 48px 48px, 48px 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}