/* style.css — StormCams USA Design System */

/* ============================================
   FONTS
   ============================================ */
/* Barlow Condensed for display headings — strong, authoritative, condensed
   Inter for body/UI — clean, reliable, professional */

:root {
  --font-display: 'Barlow Condensed', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
}

/* ============================================
   TYPE SCALE — Fluid with clamp()
   ============================================ */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.9rem  + 0.5vw,  1.125rem);
  --text-lg:   clamp(1.125rem, 0.95rem + 0.85vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1rem    + 1.5vw,  2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);
}

/* ============================================
   SPACING — 4px grid
   ============================================ */
:root {
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
}

/* ============================================
   COLOR PALETTE — Custom Dark Theme
   StormCams: Dark charcoal surfaces, crimson accent
   Single dark theme (no light mode toggle)
   ============================================ */
:root {
  /* --- Surfaces (Dark Charcoal/Navy) --- */
  --color-bg:             #0d0d1a;
  --color-surface:        #141428;
  --color-surface-2:      #1a1a2e;
  --color-surface-3:      #1f1f38;
  --color-surface-offset: #111122;
  --color-surface-offset-2: #191930;
  --color-surface-dynamic: #252540;
  --color-divider:        #2a2a44;
  --color-border:         #33335a;

  /* --- Text --- */
  --color-text:           #e8e8f0;
  --color-text-muted:     #9898b0;
  --color-text-faint:     #5a5a78;
  --color-text-inverse:   #0d0d1a;

  /* --- Primary Accent (Deep Crimson Red) --- */
  --color-primary:        #8B0000;
  --color-primary-hover:  #a31515;
  --color-primary-active: #6b0000;
  --color-primary-light:  #b83030;
  --color-primary-highlight: #2a1520;

  /* --- Secondary Accent (Muted Storm Blue) --- */
  --color-blue:           #4a7090;
  --color-blue-hover:     #5a84a8;
  --color-blue-active:    #3a5c78;

  /* --- Status Colors --- */
  --color-success:        #3a8a50;
  --color-warning:        #c08830;
  --color-error:          #c03030;

  /* --- Southeast highlight for map --- */
  --color-se-highlight:   #8B0000;
  --color-state-active:   #2a2a50;
  --color-state-available: #1e2848;
  --color-state-unavailable: #181830;

  /* --- Radius --- */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* --- Transitions --- */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* --- Shadows (dark-mode optimized) --- */
  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.5);

  /* --- Content widths --- */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;
}

/* ============================================
   COMPONENT STYLES
   ============================================ */

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--color-text);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-size: var(--text-sm);
}
.skip-link:focus {
  top: var(--space-2);
}

/* --- Header --- */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
  padding: var(--space-3) var(--space-4);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
}
.logo-icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary-light);
  flex-shrink: 0;
}
.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  line-height: 1.1;
}
.logo-text .usa {
  color: var(--color-primary-light);
}
.tagline {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: none;
}
@media (min-width: 640px) {
  .tagline { display: block; }
}

/* --- Main Layout --- */
.main-content {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-4);
}

/* --- Map Section --- */
.map-section {
  margin-bottom: var(--space-8);
}
.map-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-2);
}
.map-header h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-text);
}
.map-legend {
  display: flex;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}
.legend-dot--se {
  background: var(--color-se-highlight);
}
.legend-dot--available {
  background: var(--color-state-available);
  border: 1px solid var(--color-blue);
}
.legend-dot--unavailable {
  background: var(--color-state-unavailable);
  border: 1px solid var(--color-border);
}

.map-container {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: 0;
  overflow: hidden;
  position: relative;
}
.map-container svg {
  width: 100%;
  height: auto;
  display: block;
  position: relative;
  z-index: 1;
}
#radar-map {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

/* Map tooltip */
.map-tooltip {
  position: fixed;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  pointer-events: none;
  z-index: 150;
  opacity: 0;
  transition: opacity 120ms ease;
  box-shadow: var(--shadow-md);
  white-space: nowrap;
}
.map-tooltip.visible {
  opacity: 1;
}
.map-tooltip .tooltip-cameras {
  color: var(--color-primary-light);
  font-weight: 700;
  margin-left: var(--space-2);
}

/* SVG State Styles */
.state-path {
  stroke: var(--color-bg);
  stroke-width: 0.5;
  transition: fill var(--transition-interactive),
              stroke var(--transition-interactive),
              filter var(--transition-interactive);
  cursor: default;
}
.state-path--unavailable {
  fill: var(--color-state-unavailable);
  opacity: 0.7;
}
.state-path--available {
  fill: var(--color-state-available);
  cursor: pointer;
}
.state-path--available:hover {
  fill: var(--color-blue);
  stroke: var(--color-blue-hover);
  filter: brightness(1.15);
}
.state-path--available:active {
  fill: var(--color-blue-active);
}
.state-path--se {
  fill: #4a1535;
  cursor: pointer;
}
.state-path--se:hover {
  fill: var(--color-primary);
  stroke: var(--color-primary-light);
  filter: brightness(1.2);
}
.state-path--se:active {
  fill: var(--color-primary-active);
}

/* --- About Section --- */
.about-section {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-8);
  max-width: 72ch;
}
.about-section h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}
.about-section p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

/* --- State List Section --- */
.state-list-section {
  margin-bottom: var(--space-8);
}
.state-list-section h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}
.state-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr));
  gap: var(--space-3);
}
.state-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  cursor: pointer;
  transition: background var(--transition-interactive),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.state-card:hover {
  background: var(--color-surface-2);
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
}
.state-card:active {
  background: var(--color-surface-dynamic);
}
.state-card--al {
  border-color: var(--color-primary);
  border-width: 2px;
}
.state-card--al:hover {
  border-color: var(--color-primary-light);
}
.state-card--se {
  border-left: 3px solid var(--color-primary);
}
.state-card-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
}
.state-card-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-base);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-text);
}
.state-card-system {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.state-card-cameras {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-primary-light);
  white-space: nowrap;
}
.state-card--al .state-card-cameras {
  color: var(--color-primary-light);
}

/* --- Featured Badge --- */
.badge-featured {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  margin-left: var(--space-2);
  vertical-align: middle;
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: oklch(0.05 0.02 260 / 0.8);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 300ms cubic-bezier(0.16, 1, 0.3, 1);
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}
.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  max-width: 520px;
  width: 100%;
  padding: var(--space-8);
  position: relative;
  transform: scale(0.95);
  transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-lg);
}
.modal-overlay.active .modal {
  transform: scale(1);
}
.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: background var(--transition-interactive),
              color var(--transition-interactive);
}
.modal-close:hover {
  background: var(--color-surface-dynamic);
  color: var(--color-text);
}
.modal-close:active {
  background: var(--color-divider);
}
.modal-state-abbr {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary-light);
  margin-bottom: var(--space-1);
}
.modal-state-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-2xl);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  line-height: 1.1;
}
.modal-meta {
  display: flex;
  gap: var(--space-6);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}
.modal-meta-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.modal-meta-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.modal-meta-value {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
}
.modal-description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-6);
  max-width: 65ch;
}
.btn-cameras {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--transition-interactive),
              transform var(--transition-interactive),
              box-shadow var(--transition-interactive);
  min-height: 48px;
}
.btn-cameras:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px oklch(0.3 0.15 20 / 0.3);
}
.btn-cameras:active {
  background: var(--color-primary-active);
  transform: translateY(0);
  box-shadow: none;
}
.btn-cameras svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* --- Footer --- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  padding: var(--space-6) var(--space-4);
  text-align: center;
}
.footer-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
}
.footer-text {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.7;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-3);
}
.footer-links a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer-links a:hover {
  color: var(--color-primary-light);
}

/* --- Counter animation --- */
.camera-total {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-primary-light);
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .map-header {
    flex-direction: column;
  }
  .map-legend {
    flex-wrap: wrap;
  }
  .modal {
    padding: var(--space-6);
  }
  .modal-meta {
    flex-direction: column;
    gap: var(--space-3);
  }
  .modal-state-name {
    font-size: var(--text-xl);
  }
}

/* ============================================
   ALERTS SIDEBAR
   ============================================ */

/* --- Warning colors --- */
:root {
  --color-tornado:        #ff2020;
  --color-tornado-bg:     #3a0a0a;
  --color-tornado-border: #6b1515;
  --color-tstorm:         #ffaa00;
  --color-tstorm-bg:      #2a1f08;
  --color-tstorm-border:  #5a4010;
}

/* --- Sidebar Container --- */
.alerts-sidebar {
  position: fixed;
  top: 0;
  right: 0;
  width: 340px;
  height: 100vh;
  z-index: 90;
  background: var(--color-surface);
  border-left: 1px solid var(--color-divider);
  display: flex;
  flex-direction: column;
  transition: transform 400ms cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 400ms cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: -4px 0 24px oklch(0 0 0 / 0.3);
}
.alerts-sidebar.collapsed {
  transform: translateX(calc(100% - 48px));
}
.alerts-sidebar.collapsed .alerts-sidebar-body {
  opacity: 0;
  pointer-events: none;
}
.alerts-sidebar.collapsed .alerts-sidebar-toggle svg {
  transform: rotate(180deg);
}

/* --- Sidebar Header --- */
.alerts-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface-2);
  flex-shrink: 0;
  min-height: 52px;
}
.alerts-sidebar-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text);
}
.alerts-icon {
  width: 20px;
  height: 20px;
  color: var(--color-tstorm);
  flex-shrink: 0;
}
.alerts-sidebar-toggle {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  transition: background var(--transition-interactive),
              color var(--transition-interactive);
  flex-shrink: 0;
}
.alerts-sidebar-toggle:hover {
  background: var(--color-surface-dynamic);
  color: var(--color-text);
}
.alerts-sidebar-toggle svg {
  transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Sidebar Body --- */
.alerts-sidebar-body {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--space-3);
  transition: opacity 200ms ease;
}

/* --- Loading State --- */
.alerts-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-8) var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}
.alerts-spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-divider);
  border-top-color: var(--color-tstorm);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Empty State --- */
.alerts-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-8) var(--space-4);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.6;
}
.alerts-empty svg {
  width: 32px;
  height: 32px;
  color: var(--color-success);
}

/* --- Error State --- */
.alerts-error {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) var(--space-4);
  text-align: center;
  color: var(--color-text-faint);
  font-size: var(--text-xs);
}

/* --- Alert Cards --- */
.alert-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  margin-bottom: var(--space-2);
  border-left: 3px solid transparent;
  cursor: pointer;
  transition: background 150ms ease, transform 150ms ease;
}
.alert-card:hover {
  background: var(--color-surface-3);
  transform: translateX(2px);
}
.alert-card--tornado {
  border-left-color: var(--color-tornado);
  background: var(--color-tornado-bg);
  border-color: var(--color-tornado-border);
  border-left-color: var(--color-tornado);
}
.alert-card--tstorm {
  border-left-color: var(--color-tstorm);
  background: var(--color-tstorm-bg);
  border-color: var(--color-tstorm-border);
  border-left-color: var(--color-tstorm);
}
.alert-card-header {
  margin-bottom: var(--space-2);
}
.alert-type {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.alert-type--tornado {
  color: var(--color-tornado);
}
.alert-type--tstorm {
  color: var(--color-tstorm);
}
.alert-card-area {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: var(--space-2);
}
.alert-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.alert-states {
  display: flex;
  gap: var(--space-1);
}
.alert-state-link {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--color-surface-dynamic);
  color: var(--color-text);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-interactive);
  min-height: 24px;
  display: inline-flex;
  align-items: center;
}
.alert-state-link:hover {
  background: var(--color-primary);
  color: #fff;
}
.alert-expires {
  font-size: 0.65rem;
  color: var(--color-text-faint);
  white-space: nowrap;
}

/* --- Footer --- */
.alerts-footer {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-divider);
  font-size: 0.65rem;
  color: var(--color-text-faint);
  flex-shrink: 0;
}
.alerts-footer a {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.alerts-footer a:hover {
  color: var(--color-text);
}
.alerts-updated {
  color: var(--color-text-faint);
}

/* --- Legend warning dot --- */
.legend-dot--warning {
  background: var(--color-tstorm);
  box-shadow: 0 0 6px var(--color-tstorm);
}

/* --- Warned state on map (Severe Thunderstorm) --- */
.state-path--warned {
  stroke: var(--color-tstorm) !important;
  stroke-width: 2 !important;
  filter: drop-shadow(0 0 6px rgba(255, 170, 0, 0.5)) !important;
  animation: pulse-warn 2s ease-in-out infinite;
}
@keyframes pulse-warn {
  0%, 100% { filter: drop-shadow(0 0 4px rgba(255, 170, 0, 0.4)); }
  50% { filter: drop-shadow(0 0 10px rgba(255, 170, 0, 0.7)); }
}

/* --- Warned state on map (Tornado) --- */
.state-path--warned-tornado {
  stroke: var(--color-tornado) !important;
  stroke-width: 2.5 !important;
  filter: drop-shadow(0 0 8px rgba(255, 32, 32, 0.6)) !important;
  animation: pulse-warn-tornado 1.5s ease-in-out infinite;
}
@keyframes pulse-warn-tornado {
  0%, 100% { filter: drop-shadow(0 0 5px rgba(255, 32, 32, 0.5)); }
  50% { filter: drop-shadow(0 0 12px rgba(255, 32, 32, 0.8)); }
}

/* --- Mobile Alerts Button (floating) --- */
.alerts-mobile-btn {
  display: none;
  position: fixed;
  bottom: var(--space-4);
  right: var(--space-4);
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  border: 2px solid var(--color-tstorm);
  color: var(--color-tstorm);
  align-items: center;
  justify-content: center;
  z-index: 80;
  box-shadow: var(--shadow-lg);
  transition: background var(--transition-interactive),
              transform var(--transition-interactive);
}
.alerts-mobile-btn:hover {
  background: var(--color-surface-dynamic);
  transform: scale(1.05);
}
.alerts-mobile-btn svg {
  width: 22px;
  height: 22px;
}
.alerts-mobile-count {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  background: var(--color-tornado);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.65rem;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
}

/* --- Main content offset for sidebar on desktop --- */
@media (min-width: 1024px) {
  .main-content {
    margin-right: 340px;
  }
  .site-footer {
    margin-right: 340px;
  }
}

/* --- Responsive: mobile sidebar as slide-over --- */
@media (max-width: 1023px) {
  .alerts-sidebar {
    transform: translateX(100%);
    width: min(340px, 85vw);
  }
  .alerts-sidebar.open {
    transform: translateX(0);
  }
  .alerts-sidebar-toggle {
    display: none;
  }
  .alerts-mobile-btn {
    display: flex;
  }
}