:root {
  --color-primary: #3b82f6;
  --color-primary-dark: #2563eb;
  --color-primary-light: #60a5fa;
  --color-accent: #8b5cf6;
  --gradient-primary: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-accent)
  );
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-bg-dark: rgba(255, 255, 255, 0.04);

  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-info: #06b6d4;

  --color-background: #f9fafb;
  --color-surface: #ffffff;
  --color-surface-hover: #f3f4f6;
  --color-border: #e5e7eb;

  --color-text-primary: #111827;
  --color-text-secondary: #6b7280;
  --color-text-tertiary: #9ca3af;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  --font-family-base: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  --font-family-mono: "Monaco", "Courier New", monospace;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;

  --container-max-width: 1280px;
  --header-height: 72px;
}

body.dark-mode {
  --color-background: #0f172a;
  --color-surface: #1e293b;
  --color-surface-hover: #334155;
  --color-border: #334155;

  --color-text-primary: #f1f5f9;
  --color-text-secondary: #cbd5e1;
  --color-text-tertiary: #94a3b8;

  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px -1px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4),
    0 2px 4px -2px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4),
    0 4px 6px -4px rgba(0, 0, 0, 0.4);
}

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

* {
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  transition: background-color var(--transition-base),
    color var(--transition-base);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-4xl);
}
h2 {
  font-size: var(--font-size-3xl);
}
h3 {
  font-size: var(--font-size-2xl);
}
h4 {
  font-size: var(--font-size-xl);
}
h5 {
  font-size: var(--font-size-lg);
}
h6 {
  font-size: var(--font-size-base);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

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

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

strong {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.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;
}

.hidden {
  display: none !important;
}

.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-background);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: var(--z-modal);
  transition: opacity var(--transition-slow);
}

.loading-content {
  text-align: center;
}

.spinner {
  width: 60px;
  height: 60px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-lg);
}

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

.loading-text {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.loading-subtext {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.load-error-actions {
  margin-top: var(--spacing-md);
  display: flex;
  gap: var(--spacing-sm);
}

.header {
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  transition: all var(--transition-base);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) 0;
  gap: var(--spacing-lg);
}

.logo-section {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-primary-light)
  );
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-2xl);
  box-shadow: var(--shadow-md);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-extrabold);
  margin: 0;
  color: var(--color-text-primary);
}

.logo-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-link {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  text-decoration: none;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text-primary);
  background: var(--color-surface-hover);
  transform: translateY(-1px);
}

.nav-link:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.12);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
}

.hero-section {
  margin-bottom: var(--spacing-2xl);
  padding: var(--spacing-2xl) var(--spacing-md);
  background: var(--gradient-primary);
  color: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: var(--spacing-2xl);
  align-items: center;
}

.hero-pretitle {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  opacity: 0.95;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--spacing-sm);
}

.hero-title {
  font-size: var(--font-size-3xl);
  margin: 0 0 var(--spacing-md) 0;
  font-weight: var(--font-weight-extrabold);
  line-height: 1.05;
}

.hero-subtitle {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  max-width: 58ch;
}

.hero-ctas {
  display: flex;
  gap: var(--spacing-md);
}
.hero-ctas .btn-primary {
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.18);
}
.hero-visual img {
  max-width: 100%;
  display: block;
  filter: drop-shadow(0 8px 30px rgba(0, 0, 0, 0.12));
}

.card-glass {
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.06),
    rgba(255, 255, 255, 0.03)
  );
  backdrop-filter: blur(6px) saturate(120%);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
}
.earthquake-card:hover {
  transform: translateX(10px) scale(1.01);
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.1);
}

@media (max-width: 768px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-visual {
    display: none;
  }
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 16px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  border: 1px solid transparent;
  border-radius: 12px;
  min-height: 44px;
  box-sizing: border-box;
  cursor: pointer;
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast), opacity var(--transition-fast),
    background-color var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
  transform: none;
}

.btn-primary::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 45%;
  border-radius: inherit;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.12),
    rgba(255, 255, 255, 0.02)
  );
  pointer-events: none;
  mix-blend-mode: overlay;
}

.btn i,
.btn .fa,
.btn svg {
  font-size: 16px;
  line-height: 1;
}

.btn .btn-text {
  display: inline-block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(59, 130, 246, 0.18);
}

.btn-primary:active {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.12);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-surface-hover);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover {
  background: rgba(59, 130, 246, 0.04);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: none;
}

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

.btn-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  padding: 0;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-hover);
  border: 1px solid var(--color-border);
  box-shadow: none;
}

.btn-icon:hover {
  transform: scale(1.06);
}

.btn-small {
  padding: 8px 10px;
  font-size: var(--font-size-sm);
  min-height: 36px;
  border-radius: 10px;
}
.btn-large {
  padding: 14px 22px;
  font-size: var(--font-size-base);
  min-height: 52px;
  border-radius: 14px;
}

@media (min-width: 1024px) {
  .btn-primary {
    padding: 12px 20px;
    min-height: 52px;
  }
}

.btn:focus-visible {
  outline: 2px solid rgba(59, 130, 246, 0.18);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .btn {
    transition: none !important;
  }
}

.btn-primary:hover {
  text-decoration: none;
}

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

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

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
  border-radius: var(--radius-md);
}

.btn-icon:hover {
  background: var(--color-border);
  transform: scale(1.05);
}

.btn-large {
  padding: 14px 22px;
  font-size: var(--font-size-base);
  min-height: 52px;
  border-radius: 14px;
}

.btn-text {
  display: inline;
}

.notification-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  background: var(--color-danger);
  color: white;
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 2px var(--color-surface);
}

.main-content {
  padding: var(--spacing-2xl) 0;
  min-height: calc(100vh - var(--header-height) - 200px);
}

.alert-banner {
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-lg);
  position: relative;
  max-width: calc(var(--container-max-width) - 2 * var(--spacing-lg));
  margin-left: auto;
  margin-right: auto;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  opacity: 1;
  transform: translateY(0);
}

.alert-banner.hidden {
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  height: 0;
  overflow: hidden;
}

.alert-banner.premium {
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.03),
    rgba(255, 255, 255, 0.02)
  );
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: 10px 14px;
  display: block;
}

.alert-accent {
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 6px;
  background: linear-gradient(180deg, var(--color-danger), #f87171);
  border-radius: 6px 0 0 6px;
}

.alert-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding-left: 20px;
}

.alert-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.04);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-danger);
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.alert-text {
  flex: 1;
  min-width: 0;
}

.alert-title {
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  margin-bottom: 2px;
}
.alert-severity {
  color: var(--color-danger);
  margin-left: 6px;
  font-weight: var(--font-weight-bold);
}
.alert-message {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.alert-actions {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.alert-close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: transparent;
  border: 1px solid rgba(0, 0, 0, 0.04);
  color: var(--color-text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.alert-close:hover {
  background: rgba(0, 0, 0, 0.03);
  color: var(--color-text-primary);
  transform: translateY(-2px);
}

.btn-small {
  padding: 8px 10px;
  font-size: var(--font-size-sm);
  min-height: 36px;
}

.alert-banner.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 640px) {
  .alert-banner.premium {
    padding: 12px;
    margin: var(--spacing-md) var(--spacing-md);
  }
  .alert-content {
    flex-direction: column;
    align-items: stretch;
    padding-left: 12px;
  }
  .alert-icon {
    width: 52px;
    height: 52px;
    margin-bottom: var(--spacing-sm);
  }
  .alert-actions {
    justify-content: flex-end;
    margin-top: var(--spacing-sm);
  }
  .alert-accent {
    top: 6px;
    bottom: 6px;
  }
  .alert-message {
    font-size: var(--font-size-sm);
  }
}

@media (prefers-reduced-motion: reduce) {
  .alert-banner,
  .alert-close,
  .btn {
    transition: none !important;
    transform: none !important;
  }
}

@media (max-width: 768px) {
  .stat-card:hover,
  .earthquake-card:hover {
    transform: translateY(-2px) scale(1);
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.06);
  }
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));

  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.stat-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 1px solid var(--color-border);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
}

.weather-icon {
  background: linear-gradient(135deg, #3b82f6, #60a5fa);
  color: white;
}

.alerts-icon {
  background: linear-gradient(135deg, #f59e0b, #fbbf24);
  color: white;
}

.status-icon {
  background: linear-gradient(135deg, #10b981, #34d399);
  color: white;
}

.magnitude-icon {
  background: linear-gradient(135deg, #8b5cf6, #a78bfa);
  color: white;
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin: 0;
  color: var(--color-text-primary);
}

.card-body {
  margin-bottom: var(--spacing-md);
}

.big-stat {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.stat-number {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text-primary);
  line-height: 1;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: var(--spacing-sm) 0 0;
}

.card-footer {
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

.card-location,
.card-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.status-online {
  background: var(--color-success);
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.7;
    transform: scale(1.1);
  }
}

.status-text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.status-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.status-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
}

.status-label {
  color: var(--color-text-secondary);
}

.status-value {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-success);
  font-weight: var(--font-weight-medium);
}

.weather-temp {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.weather-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.controls-section {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.controls-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.section-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin: 0;
  color: var(--color-text-primary);
}

.section-title i {
  color: var(--color-primary);
}

.view-toggle {
  display: flex;
  background: var(--color-background);
  border-radius: var(--radius-md);
  padding: 4px;
}

.view-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.view-btn.active {
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-xs);
}

.view-btn:hover:not(.active) {
  color: var(--color-text-primary);
}

.filters-wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

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

.filter-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

.filter-label i {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
}

.filter-select,
.filter-input {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-background);
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  font-family: var(--font-family-base);
}

.filter-select:focus,
.filter-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

.earthquake-section {
  margin-bottom: var(--spacing-2xl);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.results-count {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.results-count strong {
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

.earthquake-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.earthquake-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
}

.earthquake-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-border);
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  transition: all var(--transition-base);
}

.earthquake-card.magnitude-low::before {
  background: var(--color-warning);
}

.earthquake-card.magnitude-medium::before {
  background: #f97316;
}

.earthquake-card.magnitude-high::before {
  background: var(--color-danger);
}

.earthquake-card:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.earthquake-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-md);
  gap: var(--spacing-md);
}

.earthquake-info {
  flex: 1;
}

.magnitude-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: white;
  margin-bottom: var(--spacing-sm);
}

.magnitude-low {
  background: linear-gradient(135deg, var(--color-warning), #fbbf24);
}

.magnitude-medium {
  background: linear-gradient(135deg, #f97316, #fb923c);
}

.magnitude-high {
  background: linear-gradient(135deg, var(--color-danger), #f87171);
}

.earthquake-location {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
  line-height: var(--line-height-tight);
}

.earthquake-time {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-xs);
  color: rgb(251, 238, 238);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.earthquake-details {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

.earthquake-detail {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: #03045e;
}

.earthquake-detail i {
  color: grey;
  width: 16px;
  text-align: center;
}

.earthquake-detail strong {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-semibold);
}

.load-more-container {
  text-align: center;
  padding: var(--spacing-xl) 0;
}

.no-results {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-xl);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 2px dashed var(--color-border);
}

.no-results-icon {
  font-size: var(--font-size-4xl);
  color: var(--color-text-tertiary);
  margin-bottom: var(--spacing-lg);
}

.no-results h3 {
  font-size: var(--font-size-xl);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.no-results p {
  color: var(--color-text-secondary);
  margin: 0;
}

.map-section {
  margin-bottom: var(--spacing-2xl);
}

.map-container {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.earthquake-map {
  position: relative;
  min-height: 500px;
  background: var(--color-background);
  border-radius: var(--radius-lg);
  display: flex;
  justify-content: center;
  align-items: center;
}

.map-legend {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  background: var(--color-surface);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.map-legend h4 {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xs);
}

.legend-item:last-child {
  margin-bottom: 0;
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-modal);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-lg);
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.modal-content {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  max-width: 600px;
  width: 100%;
  max-height: 80vh;
  overflow: hidden;
  animation: slideUp 0.3s ease-out;
  border: 1px solid var(--color-border);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(50px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin: 0;
  color: var(--color-text-primary);
}

.modal-close {
  width: 36px;
  height: 36px;
  border: none;
  background: var(--color-background);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: var(--color-border);
  color: var(--color-text-primary);
  transform: rotate(90deg);
}

.modal-body {
  padding: var(--spacing-xl);
  overflow-y: auto;
  max-height: calc(80vh - 120px);
}

.modal-body::-webkit-scrollbar {
  width: 8px;
}

.modal-body::-webkit-scrollbar-track {
  background: var(--color-background);
}

.modal-body::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.modal-body::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary);
}

.toast-container {
  position: fixed;
  top: calc(var(--header-height) + var(--spacing-lg));
  right: var(--spacing-lg);
  z-index: var(--z-tooltip);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-width: 400px;
}

.toast {
  background: var(--color-surface);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.toast-success {
  border-left: 4px solid var(--color-success);
}

.toast-error {
  border-left: 4px solid var(--color-danger);
}

.toast-info {
  border-left: 4px solid var(--color-info);
}

.toast-warning {
  border-left: 4px solid var(--color-warning);
}

.toast i {
  font-size: var(--font-size-lg);
}

.toast-success i {
  color: var(--color-success);
}
.toast-error i {
  color: var(--color-danger);
}
.toast-info i {
  color: var(--color-info);
}
.toast-warning i {
  color: var(--color-warning);
}

.toast span {
  flex: 1;
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
}

.loading-skeleton {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.skeleton-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
}

.skeleton-line {
  height: 20px;
  background: linear-gradient(
    90deg,
    var(--color-background) 25%,
    var(--color-border) 50%,
    var(--color-background) 75%
  );
  background-size: 200% 100%;
  border-radius: var(--radius-sm);
  animation: shimmer 1.5s infinite;
  margin-bottom: var(--spacing-sm);
}

.skeleton-line.short {
  width: 60%;
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

.skeleton-loader {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-3xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.footer-subtitle {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.footer-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-social {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 8px 10px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
  transform: translateY(-2px);
}

.contact-section {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: var(--spacing-lg);
  align-items: start;
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.contact-item {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.contact-item i {
  color: var(--color-primary);
  font-size: var(--font-size-lg);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.input,
textarea {
  width: 100%;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  font-size: var(--font-size-base);
  background: var(--color-background);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xs);
}

.footer-meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

.footer-meta a {
  color: var(--color-text-tertiary);
}

.footer-meta a:hover {
  color: var(--color-primary);
}

@media (min-width: 768px) {
  .header-content {
    flex-direction: row;
  }

  .filters-wrapper {
    grid-template-columns: repeat(2, 1fr);
  }

  .search-group {
    grid-column: span 2;
  }
}

@media (min-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .filters-wrapper {
    grid-template-columns: repeat(4, 1fr);
  }

  .search-group {
    grid-column: span 1;
  }
}

@media (max-width: 640px) {
  .btn-text {
    display: none;
  }

  .header-content {
    flex-direction: column;
    align-items: stretch;
  }

  .logo-section {
    justify-content: center;
  }

  .header-actions {
    justify-content: center;
    flex-wrap: wrap;
  }

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

  .filters-wrapper {
    grid-template-columns: 1fr;
  }

  :root {
    --font-size-4xl: 1.875rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .earthquake-details {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .modal {
    padding: var(--spacing-sm);
  }

  .modal-content {
    max-height: 90vh;
  }

  .toast-container {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    left: var(--spacing-sm);
    max-width: none;
  }
}

*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

*:focus:not(:focus-visible) {
  outline: none;
}

@media (prefers-contrast: high) {
  .btn {
    border: 2px solid currentColor;
  }

  .stat-card,
  .earthquake-card {
    border: 2px solid var(--color-border);
  }
}

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

@media print {
  .header-actions,
  .filters-wrapper,
  .btn,
  .loading-screen,
  .toast-container,
  .modal {
    display: none !important;
  }

  .stat-card,
  .earthquake-card {
    box-shadow: none;
    border: 1px solid #000;
  }

  body {
    background: white;
    color: black;
  }

  .earthquake-card {
    page-break-inside: avoid;
  }
}

.text-left {
  text-align: left;
}
.text-center {
  text-align: center;
}
.text-right {
  text-align: right;
}

.d-none {
  display: none;
}
.d-block {
  display: block;
}
.d-flex {
  display: flex;
}
.d-grid {
  display: grid;
}

.flex-column {
  flex-direction: column;
}
.justify-center {
  justify-content: center;
}
.align-center {
  align-items: center;
}
.gap-sm {
  gap: var(--spacing-sm);
}
.gap-md {
  gap: var(--spacing-md);
}
.gap-lg {
  gap: var(--spacing-lg);
}

.m-0 {
  margin: 0;
}
.mt-md {
  margin-top: var(--spacing-md);
}
.mb-md {
  margin-bottom: var(--spacing-md);
}
.p-0 {
  padding: 0;
}
.pt-md {
  padding-top: var(--spacing-md);
}
.pb-md {
  padding-bottom: var(--spacing-md);
}

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

.bg-primary {
  background-color: var(--color-primary);
}
.bg-success {
  background-color: var(--color-success);
}
.bg-danger {
  background-color: var(--color-danger);
}

.rounded {
  border-radius: var(--radius-md);
}
.rounded-lg {
  border-radius: var(--radius-lg);
}
.rounded-full {
  border-radius: var(--radius-full);
}

.shadow-sm {
  box-shadow: var(--shadow-sm);
}
.shadow-md {
  box-shadow: var(--shadow-md);
}
.shadow-lg {
  box-shadow: var(--shadow-lg);
}