:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  
  /* Utilitarian Palette */
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f5f9;
  
  --text-primary: #0f172a;
  --text-muted: #475569;
  --text-inverse: #ffffff;
  
  --border-subtle: #e2e8f0;
  --border-strong: #cbd5e1;
  --border-dark: #334155;
  
  /* Brand */
  --brand-purple: #4a154b;
  --brand-purple-hover: #371038;
  --brand-purple-light: #f5edf6;
  
  /* Status */
  --status-open-text: #166534;
  --status-open-bg: #f0fdf4;
  --status-open-border: #bbf7d0;
  --status-open-fill: #16a34a;
  
  --status-warning-text: #854d0e;
  --status-warning-bg: #fefce8;
  --status-warning-border: #fef08a;
  --status-warning-fill: #ca8a04;
  
  --status-full-text: #991b1b;
  --status-full-bg: #fef2f2;
  --status-full-border: #fecaca;
  --status-full-fill: #dc2626;

  --radius-sm: 4px;
  --radius-md: 6px;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Accessibility Utilities & Focus Styles */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10000;
  background: var(--brand-purple);
  color: var(--text-inverse);
  padding: 10px 16px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
  left: 8px;
  top: 8px;
  outline: 3px solid #ffffff;
  outline-offset: 2px;
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--brand-purple);
  outline-offset: 2px;
}

.winter-banner a:focus-visible,
.winter-banner button:focus-visible {
  outline-color: #ffffff;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 18px;
}

/* Header & Nav */
header {
  background: var(--bg-surface);
  border-bottom: 2px solid var(--brand-purple);
  position: sticky;
  top: 0;
  z-index: 50;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--brand-purple);
  text-decoration: none;
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.brand-snowflake-icon {
  width: 20px;
  height: 20px;
  fill: var(--brand-purple);
  flex-shrink: 0;
}

.brand-sub {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.85rem;
}

/* Guest Login Link */
.login-link {
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--brand-purple);
  padding: 5px 8px;
}

.login-link:hover {
  text-decoration: underline;
}

/* Hamburger Toggle Button */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 5px 8px;
  cursor: pointer;
  color: var(--text-primary);
}

.nav-toggle svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Mobile Nav Dropdown Menu */
.nav-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-surface);
  border-bottom: 2px solid var(--brand-purple);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  padding: 14px 16px;
  flex-direction: column;
  gap: 10px;
  z-index: 100;
}

.nav-menu.open {
  display: flex;
}

.user-badge {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
}

.nav-link {
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
}

.nav-link:hover {
  text-decoration: underline;
}

.add-link {
  background: var(--brand-purple);
  color: var(--text-inverse) !important;
  text-decoration: none !important;
  display: inline-block;
  text-align: center;
}

.add-link:hover {
  background: var(--brand-purple-hover);
}

.nav-link-logout {
  color: #991b1b;
}

/* Desktop Viewport (768px+) */
@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    display: flex;
    position: static;
    box-shadow: none;
    border-bottom: none;
    padding: 0;
    flex-direction: row;
    align-items: center;
    gap: 10px;
  }

  .user-badge {
    padding: 3px 8px;
    font-size: 0.8rem;
  }

  .nav-link {
    font-size: 0.88rem;
    padding: 4px 8px;
  }
}

/* Flat Emergency Winter Banner */
.winter-banner {
  background: var(--brand-purple);
  color: var(--text-inverse);
  padding: 16px;
  border-radius: var(--radius-md);
  margin-bottom: 14px;
}

.banner-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.emergency-tag {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: #000000;
  color: #ffffff;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.weather-widget {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
}

.weather-item {
  display: flex;
  gap: 4px;
}

.weather-label {
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.weather-temp {
  font-weight: 700;
  color: #ffffff;
}

.weather-sep {
  color: rgba(255, 255, 255, 0.65);
}

.winter-banner h1 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.winter-banner p {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.94);
  margin-bottom: 14px;
}

/* Flat Capacity Summary Bar */
.summary-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  padding: 8px 6px;
  text-align: center;
}

.summary-stat {
  display: flex;
  flex-direction: column;
}

.summary-stat:not(:last-child) {
  border-right: 1px solid rgba(255, 255, 255, 0.15);
}

.stat-num {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.1;
}

.stat-num.open {
  color: #86efac;
}

.stat-lbl {
  font-size: 0.72rem;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.92);
  margin-top: 2px;
}

/* Alerts */
.alert {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  font-size: 0.88rem;
  font-weight: 500;
}
.alert-success { background: var(--status-open-bg); color: var(--status-open-text); border: 1px solid var(--status-open-border); }
.alert-danger { background: var(--status-full-bg); color: var(--status-full-text); border: 1px solid var(--status-full-border); }

/* Shelter Card Stack & Desktop Flex Grid */
.shelter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.location-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 16px;
  flex: 1 1 100%;
  min-width: 290px;
  display: flex;
  flex-direction: column;
}

/* 2 columns on tablet / mid-screen */
@media (min-width: 680px) {
  .location-card {
    flex: 1 1 calc(50% - 16px);
  }
}

/* 3 columns on desktop */
@media (min-width: 1040px) {
  .location-card {
    flex: 1 1 calc(33.333% - 16px);
  }
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 4px;
}

.location-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.location-address {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.location-desc {
  font-size: 0.88rem;
  color: var(--text-primary);
  margin-bottom: 10px;
}

/* Collapsible Rules */
.details-collapse {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  margin-bottom: 12px;
  font-size: 0.84rem;
}

.details-collapse summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--brand-purple);
}

.details-body {
  margin-top: 6px;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Status Badges */
.badge {
  display: inline-block;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.badge-available { background: var(--status-open-bg); color: var(--status-open-text); border: 1px solid var(--status-open-border); }
.badge-filling { background: var(--status-warning-bg); color: var(--status-warning-text); border: 1px solid var(--status-warning-border); }
.badge-full { background: var(--status-full-bg); color: var(--status-full-text); border: 1px solid var(--status-full-border); }
.badge-inactive,
.badge-unknown { background: #e2e8f0; color: #334155; border: 1px solid #cbd5e1; }

/* Inactive Shelter State (keeps >= 4.5:1 text contrast without opacity washout) */
.location-card.is-inactive {
  background: var(--bg-subtle);
  border: 1px dashed var(--border-strong);
}

.location-card.is-inactive .location-title,
.location-card.is-inactive .location-desc {
  color: #334155;
}

.location-card.is-inactive .capacity-box {
  background: var(--bg-surface);
}

.inactive-notice {
  background: #e2e8f0;
  color: #1e293b;
  border-left: 3px solid #475569;
  padding: 6px 10px;
  font-size: 0.84rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
}

/* Capacity Meter */
.capacity-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin: 10px 0;
}

.capacity-stats {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 6px;
}

.capacity-numbers {
  font-size: 1.15rem;
  font-weight: 700;
}

.capacity-sep {
  color: var(--text-muted);
  margin: 0 2px;
}

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

.capacity-lbl {
  font-size: 0.8rem;
  font-weight: normal;
  color: var(--text-muted);
  margin-left: 4px;
}

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

.progress-bar-bg {
  width: 100%;
  height: 8px;
  background: var(--border-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--status-open-fill);
  border-radius: var(--radius-sm);
  transition: width 0.2s linear;
}

.progress-bar-fill.high { background: var(--status-warning-fill); }
.progress-bar-fill.full { background: var(--status-full-fill); }
.progress-bar-fill.inactive,
.progress-bar-fill.unknown { background: #94a3b8; }

.capacity-timestamp {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 5px;
  text-align: right;
}

/* Auto-push actions & controls to bottom of card so heights align */
.action-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: auto;
  padding-top: 10px;
}

.btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-dark);
}

.btn-action:hover {
  background: var(--bg-subtle);
}

.btn-action svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

/* Staff Controls */
.admin-controls {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
}

.admin-controls-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.counter-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
}

.btn-counter {
  width: 40px;
  height: 40px;
  font-size: 1.3rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-surface);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-counter:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.counter-display {
  font-size: 0.9rem;
  color: var(--text-primary);
}

.counter-display strong {
  font-size: 1.15rem;
}

.admin-links {
  margin-top: 8px;
}

.btn-manage-link {
  font-size: 0.82rem;
  color: var(--brand-purple);
  text-decoration: none;
  font-weight: 600;
}

.btn-manage-link:hover {
  text-decoration: underline;
}

/* Forms */
.form-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  margin: 14px 0;
}

.auth-card {
  max-width: 420px;
  margin: 20px auto;
}

.form-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.form-subtitle {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.form-group {
  margin-bottom: 12px;
}

/* Form rows: 1 column on mobile, 2 columns on tablet/desktop */
.form-row {
  display: flex;
  flex-direction: column;
  gap: 0;
}

@media (min-width: 640px) {
  .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
}

.form-group label,
.form-legend {
  display: block;
  font-size: 0.84rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.form-group .checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 6px 0;
  font-weight: 600;
  cursor: pointer;
}

.form-group .checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--brand-purple);
  cursor: pointer;
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 6px;
}

@media (min-width: 640px) {
  .radio-group {
    flex-direction: row;
    gap: 16px;
  }
}

.form-input {
  width: 100%;
  padding: 9px 10px;
  font-size: 0.92rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
}

.form-input:focus {
  border-color: var(--brand-purple);
  box-shadow: 0 0 0 2px rgba(74, 21, 75, 0.15);
}

.btn-submit {
  width: 100%;
  padding: 10px;
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 1px solid var(--brand-purple);
  background: var(--brand-purple);
  color: var(--text-inverse);
  cursor: pointer;
  margin-top: 6px;
}

.btn-submit:hover {
  background: var(--brand-purple-hover);
}

.auth-helper-links {
  text-align: center;
  margin-top: 12px;
  font-size: 0.84rem;
}

.auth-helper-links a {
  color: var(--brand-purple);
  text-decoration: underline;
}

.demo-credentials-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px;
  margin-top: 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.site-footer {
  text-align: center;
  padding: 20px 10px;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  margin-top: 24px;
}

.site-footer strong {
  color: var(--text-primary);
}

/* User Accounts Table & Mobile Card Flex-Wrap */
.user-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.user-row-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.user-row-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px;
}

.user-row-username {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.user-row-email {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.user-row-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 8px;
}

.user-row-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
}

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

.user-row-actions {
  display: inline-flex;
  gap: 6px;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 8px;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-dark);
  background: var(--bg-surface);
  color: var(--text-primary);
  cursor: pointer;
  text-decoration: none;
}

.btn-icon:hover {
  background: var(--bg-subtle);
}

.btn-icon svg {
  width: 13px;
  height: 13px;
  fill: currentColor;
}

.btn-icon.danger {
  border-color: #fca5a5;
  color: #991b1b;
}

.btn-icon.danger:hover {
  background: #fef2f2;
}

.weather-icon-svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
  display: inline-block;
  vertical-align: -2px;
}

/* On Desktop screens (768px+), format User list as a structured grid */
@media (min-width: 768px) {
  .user-row-card {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
  }
  .user-row-top {
    flex: 1 1 auto;
    justify-content: flex-start;
    gap: 16px;
  }
  .user-row-bottom {
    flex: 1 1 auto;
    justify-content: flex-end;
    border-top: none;
    padding-top: 0;
    gap: 16px;
  }
}

/* Minimal Flat Modal Dialog */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background: var(--bg-surface);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  max-width: 400px;
  width: 100%;
  padding: 18px 16px;
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.modal-body {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-bottom: 16px;
}

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

.modal-btn {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  border: 1px solid transparent;
}

.modal-btn-cancel {
  background: var(--bg-subtle);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.modal-btn-confirm {
  background: #dc2626;
  color: #ffffff;
}

.modal-btn-confirm:hover {
  background: #b91c1c;
}

@media (prefers-reduced-motion: reduce) {
  .progress-bar-fill,
  .modal-overlay {
    transition: none;
  }
}