/* Mobile-First CSS Variables for 1440x3088 screens */
:root {
  --aurora-primary: #0c1445;
  --aurora-secondary: #4b1e70;
  --aurora-accent: #7a297c;
  --aurora-light: #e0f7fa;
  --aurora-glow: #64b5f6;
  --lightning-low: #00c853;
  --lightning-medium: #ffeb3b;
  --lightning-high: #ff5722;
  --lightning-extreme: #e91e63;
  --dark-bg: #1a202c;
  --dark-card: #2d3748;
  --dark-text: #e2e8f0;
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 12px 40px rgba(0, 0, 0, 0.15);
  --shadow-strong: 0 20px 60px rgba(0, 0, 0, 0.2);
  
  /* Mobile-specific variables */
  --mobile-touch-target: 48px;
  --mobile-touch-target-lg: 56px;
  --mobile-spacing-xs: 0.5rem;
  --mobile-spacing-sm: 0.75rem;
  --mobile-spacing-md: 1rem;
  --mobile-spacing-lg: 1.5rem;
  --mobile-spacing-xl: 2rem;
  --mobile-border-radius: 12px;
  --mobile-border-radius-lg: 16px;
  --mobile-transition: all 0.2s ease;
  --mobile-backdrop-blur: 8px;
  --mobile-backdrop-blur-strong: 12px;
}

/* Mobile-First Base Styles */
* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeSpeed;
}

body {
  font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #0c1445, #4b1e70);
  background-attachment: fixed;
  margin: 0;
  padding: 0;
  color: var(--aurora-primary);
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  position: relative;
  line-height: 1.6;
}

/* Allow text selection on content elements */
p, span, div[class*="content"], article, section, .text-content {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
}

/* Mobile-optimized Aurora Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(120, 119, 198, 0.2) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(255, 118, 117, 0.2) 0%, transparent 50%),
    radial-gradient(ellipse at 40% 80%, rgba(255, 204, 112, 0.2) 0%, transparent 50%);
  animation: aurora-dance-mobile 15s ease-in-out infinite;
  pointer-events: none;
  z-index: -1;
  will-change: transform;
  transform: translateZ(0);
}

@keyframes aurora-dance-mobile {
  0%, 100% {
    transform: translateY(0px) rotate(0deg) translateZ(0);
    opacity: 0.4;
  }
  33% {
    transform: translateY(-20px) rotate(0.5deg) translateZ(0);
    opacity: 0.6;
  }
  66% {
    transform: translateY(15px) rotate(-0.5deg) translateZ(0);
    opacity: 0.5;
  }
}

/* Enhanced Mobile Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.025em;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  margin: 0;
  line-height: 1.2;
}

h1 {
  font-size: clamp(1.75rem, 5vw, 3rem);
  margin-bottom: var(--mobile-spacing-lg);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  margin-bottom: var(--mobile-spacing-md);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 2rem);
  margin-bottom: var(--mobile-spacing-md);
}

h4 {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  margin-bottom: var(--mobile-spacing-sm);
}

/* Mobile-optimized input styles */
input, textarea, select {
  font-size: 16px;
  min-height: var(--mobile-touch-target);
  transition: var(--mobile-transition);
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
  border-radius: var(--mobile-border-radius);
  padding: var(--mobile-spacing-sm) var(--mobile-spacing-md);
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.1);
  color: white;
  backdrop-filter: blur(var(--mobile-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--mobile-backdrop-blur));
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
  background: rgba(255, 255, 255, 0.15);
}

/* Mobile-optimized button styles */
button, [role="button"] {
  min-height: var(--mobile-touch-target);
  min-width: var(--mobile-touch-target);
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: var(--mobile-transition);
  border-radius: var(--mobile-border-radius);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  transform: translateZ(0);
  will-change: transform;
}

button:active {
  transform: scale(0.98) translateZ(0);
}

/* Dark mode styles - Mobile optimized */
.dark-mode {
  background-color: var(--dark-bg);
  color: var(--dark-text);
}

.dark-mode .bg-white {
  background-color: var(--dark-card);
}

.dark-mode .text-gray-700,
.dark-mode .text-gray-500,
.dark-mode .text-white\/80,
.dark-mode .text-white\/60,
.dark-mode .text-white {
  color: var(--dark-text);
}

.dark-mode .bg-blue-600 {
  background-color: #3182ce;
}

.dark-mode .bg-purple-600 {
  background-color: #6b46c1;
}

/* Alert styles - Mobile optimized */
.warning-low {
  background-color: var(--lightning-low);
  color: white;
  padding: var(--mobile-spacing-md);
  border-radius: var(--mobile-border-radius);
  margin: var(--mobile-spacing-sm) 0;
}

.warning-medium {
  background-color: var(--lightning-medium);
  color: var(--aurora-secondary);
  padding: var(--mobile-spacing-md);
  border-radius: var(--mobile-border-radius);
  margin: var(--mobile-spacing-sm) 0;
}

.warning-high {
  background-color: var(--lightning-high);
  color: white;
  padding: var(--mobile-spacing-md);
  border-radius: var(--mobile-border-radius);
  margin: var(--mobile-spacing-sm) 0;
}

.warning-extreme {
  background-color: var(--lightning-extreme);
  color: white;
  padding: var(--mobile-spacing-md);
  border-radius: var(--mobile-border-radius);
  margin: var(--mobile-spacing-sm) 0;
}

/* Export buttons - Mobile optimized */
.export-button {
  margin-top: var(--mobile-spacing-sm);
  padding: var(--mobile-spacing-sm) var(--mobile-spacing-md);
  border-radius: var(--mobile-border-radius);
  font-size: 0.875rem;
  cursor: pointer;
  min-height: var(--mobile-touch-target);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--mobile-transition);
}

/* Mobile-First Glassmorphism utility classes */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--mobile-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--mobile-backdrop-blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-soft);
  border-radius: var(--mobile-border-radius);
}

.glass-strong {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(var(--mobile-backdrop-blur-strong));
  -webkit-backdrop-filter: blur(var(--mobile-backdrop-blur-strong));
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: var(--shadow-medium);
  border-radius: var(--mobile-border-radius-lg);
}

/* Enhanced Search input styles - Mobile optimized */
#city-search-container {
  background-color: rgba(255, 255, 255, 0.95) !important;
  backdrop-filter: blur(var(--mobile-backdrop-blur));
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--mobile-border-radius-lg) !important;
  padding: var(--mobile-spacing-md) !important;
  box-shadow: var(--shadow-medium) !important;
  position: absolute;
  top: var(--mobile-spacing-md);
  left: var(--mobile-spacing-md);
  right: var(--mobile-spacing-md);
  width: auto !important;
  z-index: 1000;
}

#city-search-container input {
  background-color: white !important;
  border: 1px solid #d1d5db !important;
  transition: var(--mobile-transition) !important;
  border-radius: var(--mobile-border-radius) !important;
  min-height: var(--mobile-touch-target) !important;
  font-size: 16px !important;
  padding: var(--mobile-spacing-sm) var(--mobile-spacing-md) !important;
}

#city-search-container input:focus {
  border-color: #3b82f6 !important;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1) !important;
  outline: none !important;
}

#city-search-container button {
  min-height: var(--mobile-touch-target) !important;
  padding: var(--mobile-spacing-sm) var(--mobile-spacing-md) !important;
  border-radius: var(--mobile-border-radius) !important;
}

/* Search button styles - Mobile optimized */
button.bg-blue-600 {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  transition: var(--mobile-transition);
  min-height: var(--mobile-touch-target);
}

button.bg-blue-600:hover {
  background: linear-gradient(135deg, #8b5cf6, #3b82f6);
  transform: translateY(-1px) translateZ(0);
}

/* Back button styles - Mobile optimized */
button.back-button {
  background: transparent;
  border: none;
  color: white;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--mobile-spacing-sm);
  padding: 0;
  min-height: var(--mobile-touch-target);
  transition: var(--mobile-transition);
}

button.back-button svg {
  stroke: white;
  transition: var(--mobile-transition);
}

button.back-button:hover {
  color: #ffcc00;
  cursor: pointer;
  transform: translateX(-2px) translateZ(0);
}

button.back-button:hover svg {
  stroke: #ffcc00;
}

/* Enhanced Back to Map button - Mobile optimized */
.back-to-map-btn {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.9), rgba(139, 92, 246, 0.9));
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(var(--mobile-backdrop-blur));
  border-radius: var(--mobile-border-radius-lg);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: var(--mobile-transition);
  min-height: var(--mobile-touch-target-lg);
  padding: var(--mobile-spacing-md) var(--mobile-spacing-xl);
  transform: translateZ(0);
  will-change: transform;
}

.back-to-map-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.3s ease;
}

.back-to-map-btn:hover::before {
  left: 100%;
}

.back-to-map-btn:hover {
  transform: scale(1.02) translateY(-2px) translateZ(0);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.3);
  border-color: rgba(255, 255, 255, 0.4);
}

.back-to-map-btn:active {
  transform: scale(0.98) translateY(0) translateZ(0);
}

/* Language selector buttons - Mobile optimized */
.language-option {
  border-radius: 0;
  padding: var(--mobile-spacing-sm) var(--mobile-spacing-md);
  font-weight: 600;
  transition: var(--mobile-transition);
  min-height: var(--mobile-touch-target);
  min-width: var(--mobile-touch-target);
}

.language-option.bg-gradient-to-r {
  background-size: 200% 200%;
  background-position: left center;
}

.language-option.bg-gradient-to-r:hover {
  background-position: right center;
  transform: translateY(-1px) translateZ(0);
}

/* Header and Footer - Mobile optimized */
header.aurora-bg {
  background: linear-gradient(135deg, #0c1445, #7a297c);
  padding: var(--mobile-spacing-md) var(--mobile-spacing-lg);
  box-shadow: var(--shadow-medium);
}

footer.aurora-bg {
  background: linear-gradient(135deg, #4b1e70, #0c1445);
  padding: var(--mobile-spacing-xl) var(--mobile-spacing-lg);
}

/* Main container - Mobile optimized */
#main-container {
  display: grid;
  grid-template-areas: "header" "content";
  grid-template-rows: auto 1fr;
  min-height: 100vh;
  min-height: 100dvh;
}

header {
  grid-area: header;
  box-shadow: var(--shadow-soft);
  z-index: 1000;
  position: sticky;
  top: 0;
}

#content {
  display: block;
  grid-area: content;
  padding: var(--mobile-spacing-lg);
  padding-left: max(var(--mobile-spacing-lg), env(safe-area-inset-left));
  padding-right: max(var(--mobile-spacing-lg), env(safe-area-inset-right));
  padding-bottom: max(var(--mobile-spacing-lg), env(safe-area-inset-bottom));
}

.hidden-on-sensor {
  display: none !important;
}

#station-detail.active {
  display: block;
}

/* Map container - Mobile optimized */
#station-map {
  height: 60vh;
  min-height: 400px;
  border-radius: var(--mobile-border-radius-lg);
  box-shadow: var(--shadow-medium);
  overflow: hidden;
}

#map-container {
  display: block;
  position: relative;
  border-radius: var(--mobile-border-radius-lg);
  overflow: hidden;
  margin-bottom: var(--mobile-spacing-xl);
}

#station-detail {
  display: none;
  padding: var(--mobile-spacing-lg);
}

/* Station cards - Mobile optimized */
.station-card {
  transition: var(--mobile-transition);
  cursor: pointer;
  border-radius: var(--mobile-border-radius-lg);
  padding: var(--mobile-spacing-md);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--mobile-backdrop-blur));
  border: 1px solid var(--glass-border);
  transform: translateZ(0);
  will-change: transform;
}

.station-card:hover {
  transform: translateY(-4px) translateZ(0);
  box-shadow: var(--shadow-medium);
}

.station-card:active {
  transform: translateY(-2px) translateZ(0);
}

/* Sensor values - Mobile optimized */
.sensor-value {
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  font-weight: 600;
  line-height: 1.2;
}

.sensor-label {
  font-size: clamp(0.75rem, 2.5vw, 0.875rem);
  opacity: 0.8;
  line-height: 1.4;
}

.lightning-icon {
  animation: pulse-mobile 2s infinite;
}

@keyframes pulse-mobile {
  0% { opacity: 1; }
  50% { opacity: 0.6; }
  100% { opacity: 1; }
}

/* Mobile-optimized sensor grid */
.sensor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--mobile-spacing-lg);
  margin-top: var(--mobile-spacing-xl);
  padding: var(--mobile-spacing-lg);
  background: var(--glass-bg);
  border-radius: var(--mobile-border-radius-lg);
  backdrop-filter: blur(var(--mobile-backdrop-blur));
  border: 1px solid var(--glass-border);
}

/* Enhanced measurement bars - Mobile optimized */
.wind-bar, .rain-bar, .temp-bar, .uv-bar {
  height: 24px;
  margin: var(--mobile-spacing-md) 0;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  transform: translateZ(0);
}

.wind-bar {
  background: linear-gradient(to right, 
    #26c6da 0%,
    #4dd0e1 33%,
    #64b5f6 66%,
    #9575cd 100%
  );
}

.rain-bar {
  background: linear-gradient(to right, 
    #607d8b 0%,
    #4ecdc4 33%,
    #26c6da 66%,
    #00bcd4 100%
  );
}

.temp-bar {
  background: linear-gradient(to right, 
    #e53935 0%,
    #f44336 33%,
    #fb8c00 66%,
    #ffa726 100%
  );
}

.uv-bar {
  background: linear-gradient(to right, 
    #689f38 0%,
    #9ccc65 33%,
    #fbc02d 66%,
    #ff5722 100%
  );
}

.bar-label {
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--dark-bg);
  padding: var(--mobile-spacing-xs) var(--mobile-spacing-sm);
  border-radius: var(--mobile-border-radius);
  font-size: 0.75rem;
  opacity: 0;
  transition: var(--mobile-transition);
  pointer-events: none;
}

.bar-label:hover {
  opacity: 1;
}

/* Custom popup - Mobile optimized */
.custom-popup .leaflet-popup-content-wrapper {
  border-radius: var(--mobile-border-radius-lg);
  box-shadow: var(--shadow-medium);
  margin-bottom: var(--mobile-spacing-lg);
  min-width: 280px;
}

/* History Chart - Mobile optimized */
#history-chart {
  width: 100% !important;
  max-height: 300px;
  border-radius: var(--mobile-border-radius);
}

/* News section styles - Mobile optimized */
#news-section {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: var(--mobile-border-radius-lg);
  padding: var(--mobile-spacing-lg);
  box-shadow: var(--shadow-medium);
  margin-bottom: var(--mobile-spacing-xl);
  color: white;
}

.news-item {
  transition: var(--mobile-transition);
  border-radius: var(--mobile-border-radius);
  padding: var(--mobile-spacing-md);
  margin-bottom: var(--mobile-spacing-md);
  background: rgba(255, 255, 255, 0.1);
  transform: translateZ(0);
  will-change: transform;
}

.news-item:hover {
  transform: translateY(-2px) translateZ(0);
  box-shadow: var(--shadow-soft);
  background: rgba(255, 255, 255, 0.15);
}

/* Donation section styles - Mobile optimized */
#donation-section {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: var(--mobile-border-radius-lg);
  padding: var(--mobile-spacing-lg);
  margin-bottom: var(--mobile-spacing-xl);
  box-shadow: var(--shadow-medium);
}

#donation-section .bg-white\/10 {
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--mobile-border-radius);
  padding: var(--mobile-spacing-md);
}

/* Admin panel styles - Mobile optimized */
.tab-button {
  min-height: var(--mobile-touch-target);
  padding: var(--mobile-spacing-sm) var(--mobile-spacing-md);
  border-radius: var(--mobile-border-radius);
  transition: var(--mobile-transition);
}

.tab-button.active {
  border-bottom-color: #3b82f6;
  color: #3b82f6;
  background: rgba(59, 130, 246, 0.1);
}

.tab-content {
  animation: fadeIn-mobile 0.3s ease-in-out;
}

@keyframes fadeIn-mobile {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* PayPal button styles - Mobile optimized */
.paypal-button {
  background: linear-gradient(135deg, #ffc439, #ffb800);
  transition: var(--mobile-transition);
  min-height: var(--mobile-touch-target);
  padding: var(--mobile-spacing-sm) var(--mobile-spacing-lg);
  border-radius: var(--mobile-border-radius);
  transform: translateZ(0);
  will-change: transform;
}

.paypal-button:hover {
  background: linear-gradient(135deg, #ffb800, #ff9500);
  transform: translateY(-1px) translateZ(0);
  box-shadow: 0 4px 12px rgba(255, 184, 0, 0.3);
}

/* Enhanced Card Styles with Mobile Glassmorphism */
.enhanced-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--mobile-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--mobile-backdrop-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--mobile-border-radius-lg);
  box-shadow: var(--shadow-soft);
  transition: var(--mobile-transition);
  position: relative;
  overflow: hidden;
  transform: translateZ(0);
  will-change: transform;
}

.enhanced-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  opacity: 0;
  transition: var(--mobile-transition);
}

.enhanced-card:hover {
  transform: translateY(-4px) scale(1.01) translateZ(0);
  box-shadow: var(--shadow-strong);
  border-color: rgba(255, 255, 255, 0.4);
}

.enhanced-card:hover::before {
  opacity: 1;
}

/* Enhanced Button Styles - Mobile optimized */
.btn-primary {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border: none;
  border-radius: var(--mobile-border-radius);
  padding: var(--mobile-spacing-sm) var(--mobile-spacing-lg);
  font-weight: 600;
  color: white;
  cursor: pointer;
  transition: var(--mobile-transition);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
  min-height: var(--mobile-touch-target);
  display: flex;
  align-items: center;
  justify-content: center;
  transform: translateZ(0);
  will-change: transform;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.3s ease;
}

.btn-primary:hover {
  transform: translateY(-2px) translateZ(0);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:active {
  transform: translateY(0) translateZ(0);
}

/* Enhanced Language Selector - Mobile optimized */
.language-selector {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--mobile-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--mobile-backdrop-blur));
  border: 1px solid var(--glass-border) !important;
  border-radius: var(--mobile-border-radius) !important;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.language-option {
  background: transparent !important;
  border: none;
  padding: var(--mobile-spacing-sm) var(--mobile-spacing-md);
  font-weight: 600;
  color: white;
  transition: var(--mobile-transition);
  position: relative;
}

.language-option::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.3), rgba(139, 92, 246, 0.3));
  opacity: 0;
  transition: var(--mobile-transition);
}

.language-option:hover::before {
  opacity: 1;
}

.language-option:hover {
  color: white;
  transform: scale(1.05) translateZ(0);
}

/* Enhanced Station Detail Cards - Mobile optimized */
.bg-white {
  background: var(--glass-bg) !important;
  backdrop-filter: blur(var(--mobile-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--mobile-backdrop-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--mobile-border-radius-lg);
  transition: var(--mobile-transition);
}

.bg-white:hover {
  background: rgba(255, 255, 255, 0.15) !important;
  transform: translateY(-4px) translateZ(0);
  box-shadow: var(--shadow-medium);
}

/* Enhanced Sensor Grid - Mobile optimized */
.sensor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--mobile-spacing-lg);
  margin-top: var(--mobile-spacing-xl);
  padding: var(--mobile-spacing-lg);
  background: var(--glass-bg);
  border-radius: var(--mobile-border-radius-lg);
  backdrop-filter: blur(var(--mobile-backdrop-blur));
  border: 1px solid var(--glass-border);
}

/* Enhanced Sensor Cards - Mobile optimized */
.sensor-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.05));
  backdrop-filter: blur(var(--mobile-backdrop-blur-strong));
  -webkit-backdrop-filter: blur(var(--mobile-backdrop-blur-strong));
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--mobile-border-radius-lg);
  padding: var(--mobile-spacing-lg);
  transition: var(--mobile-transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transform: translateZ(0);
  will-change: transform;
}

.sensor-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #3b82f6, #8b5cf6, #06b6d4);
  opacity: 0;
  transition: var(--mobile-transition);
}

.sensor-card:hover {
  transform: translateY(-4px) scale(1.01) translateZ(0);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0.1));
  border-color: rgba(255, 255, 255, 0.4);
  box-shadow: var(--shadow-strong);
}

.sensor-card:hover::before {
  opacity: 1;
}

.sensor-card .sensor-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: var(--mobile-border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--mobile-spacing-md);
  transition: var(--mobile-transition);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.sensor-card:hover .sensor-icon {
  transform: rotate(5deg) scale(1.1) translateZ(0);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
}

.sensor-card .sensor-icon svg {
  width: 24px;
  height: 24px;
  color: white;
}

.sensor-card .sensor-title {
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--mobile-spacing-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sensor-card .sensor-value {
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 700;
  color: white;
  margin-bottom: var(--mobile-spacing-xs);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.sensor-card .sensor-unit {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
}

.sensor-card .sensor-status {
  position: absolute;
  top: var(--mobile-spacing-md);
  right: var(--mobile-spacing-md);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.3);
  animation: pulse-status-mobile 2s infinite;
}

@keyframes pulse-status-mobile {
  0%, 100% {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.3);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(16, 185, 129, 0.1);
  }
}

.sensor-card.warning .sensor-status {
  background: #f59e0b;
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.3);
}

.sensor-card.error .sensor-status {
  background: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.3);
}

/* Specific sensor type styling - Mobile optimized */
.sensor-card.temperature .sensor-icon {
  background: linear-gradient(135deg, #f59e0b, #f97316);
}

.sensor-card.humidity .sensor-icon {
  background: linear-gradient(135deg, #06b6d4, #0891b2);
}

.sensor-card.pressure .sensor-icon {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

.sensor-card.wind .sensor-icon {
  background: linear-gradient(135deg, #10b981, #059669);
}

.sensor-card.rain .sensor-icon {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

.sensor-card.solar .sensor-icon {
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
}

.sensor-card.uv .sensor-icon {
  background: linear-gradient(135deg, #f97316, #ea580c);
}

.sensor-card.lightning .sensor-icon {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
  animation: lightning-pulse-mobile 3s infinite;
}

@keyframes lightning-pulse-mobile {
  0%, 90%, 100% {
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
  }
  95% {
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.8);
  }
}

.sensor-card.battery .sensor-icon {
  background: linear-gradient(135deg, #10b981, #059669);
}

.sensor-card.signal .sensor-icon {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
}

/* Enhanced measurement bars - Mobile optimized */
.sensor-card .measurement-bar {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
  margin-top: var(--mobile-spacing-sm);
  overflow: hidden;
  position: relative;
}

.sensor-card .measurement-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: linear-gradient(90deg, #10b981, #06b6d4, #3b82f6);
  border-radius: 3px;
  transition: width 0.8s ease;
  width: var(--bar-width, 0%);
}

.sensor-card.temperature .measurement-bar::after {
  background: linear-gradient(90deg, #3b82f6, #f59e0b, #ef4444);
}

.sensor-card.humidity .measurement-bar::after {
  background: linear-gradient(90deg, #fbbf24, #06b6d4, #1d4ed8);
}

.sensor-card.wind .measurement-bar::after {
  background: linear-gradient(90deg, #10b981, #06b6d4, #8b5cf6);
}

/* Enhanced Historical Data Menu Styles - Mobile optimized */
#history-container select {
  background: rgba(0, 0, 0, 0.4) !important;
  backdrop-filter: blur(var(--mobile-backdrop-blur)) !important;
  -webkit-backdrop-filter: blur(var(--mobile-backdrop-blur)) !important;
  border: 1px solid rgba(255, 255, 255, 0.4) !important;
  color: white !important;
  box-shadow: var(--shadow-soft) !important;
  min-height: var(--mobile-touch-target) !important;
  border-radius: var(--mobile-border-radius) !important;
  padding: var(--mobile-spacing-sm) var(--mobile-spacing-md) !important;
}

#history-container select:hover {
  background: rgba(0, 0, 0, 0.5) !important;
  border-color: rgba(255, 255, 255, 0.5) !important;
  box-shadow: var(--shadow-medium) !important;
}

#history-container select:focus {
  background: rgba(0, 0, 0, 0.6) !important;
  border-color: #3b82f6 !important;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3), var(--shadow-medium) !important;
  outline: none !important;
}

#history-container select option {
  background: rgba(0, 0, 0, 0.9) !important;
  color: white !important;
  padding: var(--mobile-spacing-sm) var(--mobile-spacing-md) !important;
}

#history-container select option:hover {
  background: rgba(59, 130, 246, 0.8) !important;
}

#history-container select option:checked {
  background: rgba(59, 130, 246, 0.9) !important;
  color: white !important;
}

/* Enhanced Controls Section Background - Mobile optimized */
#history-container .bg-white\/10 {
  background: rgba(0, 0, 0, 0.3) !important;
  backdrop-filter: blur(var(--mobile-backdrop-blur)) !important;
  -webkit-backdrop-filter: blur(var(--mobile-backdrop-blur)) !important;
  border: 1px solid rgba(255, 255, 255, 0.3) !important;
  border-radius: var(--mobile-border-radius-lg) !important;
}

/* Enhanced Labels for Better Contrast - Mobile optimized */
#history-container label {
  color: rgba(255, 255, 255, 0.95) !important;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5) !important;
  font-weight: 600 !important;
  font-size: clamp(0.875rem, 2.5vw, 1rem) !important;
}

/* Improved Button Styling - Mobile optimized */
#history-container #fetch-history {
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4) !important;
  border: 1px solid rgba(255, 255, 255, 0.2) !important;
  min-height: var(--mobile-touch-target-lg) !important;
  padding: var(--mobile-spacing-md) var(--mobile-spacing-lg) !important;
}

#history-container #fetch-history:hover {
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.5) !important;
  border-color: rgba(255, 255, 255, 0.3) !important;
  transform: translateY(-2px) translateZ(0);
}

/* Custom Scrollbar - Mobile optimized */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, #8b5cf6, #3b82f6);
}

/* Loading Animation - Mobile optimized */
.loading-shimmer {
  background: linear-gradient(90deg, 
    rgba(255, 255, 255, 0.1) 0%, 
    rgba(255, 255, 255, 0.3) 50%, 
    rgba(255, 255, 255, 0.1) 100%);
  background-size: 200% 100%;
  animation: shimmer-loading-mobile 1s infinite;
}

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

/* Focus States for Accessibility - Mobile optimized */
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* Hidden utility class */
.hidden {
  display: none !important;
}

/* Mobile-First Responsive Breakpoints */

/* Extra small devices (phones, 375px and up) */
@media (min-width: 375px) {
  #content {
    padding: var(--mobile-spacing-lg) var(--mobile-spacing-xl);
  }
  
  .sensor-grid {
    padding: var(--mobile-spacing-xl);
  }
}

/* Small devices (large phones, 640px and up) */
@media (min-width: 640px) {
  .sensor-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  }
  
  #city-search-container {
    width: 400px !important;
    left: var(--mobile-spacing-lg) !important;
    right: auto !important;
  }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
  .sensor-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  }

  #station-map {
    height: 600px;
  }

  #history-chart {
    max-height: 400px;
  }

  .enhanced-card:hover {
    transform: translateY(-8px) scale(1.02) translateZ(0);
  }
}

/* Large devices (desktops, 1024px and up) */
@media (min-width: 1024px) {
  .sensor-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  }
}

/* High-resolution mobile devices (1440px and up) - Target resolution */
@media (min-width: 1440px) and (max-width: 1600px) {
  /* Specific optimizations for 1440x3088 mobile screens */
  
  body {
    font-size: 18px;
    line-height: 1.7;
  }
  
  :root {
    --mobile-touch-target: 56px;
    --mobile-touch-target-lg: 64px;
    --mobile-spacing-sm: 1rem;
    --mobile-spacing-md: 1.25rem;
    --mobile-spacing-lg: 2rem;
    --mobile-spacing-xl: 2.5rem;
    --mobile-border-radius: 16px;
    --mobile-border-radius-lg: 20px;
  }
  
  h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
  }
  
  h2 {
    font-size: clamp(2rem, 5vw, 3rem);
  }
  
  h3 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
  }
  
  .sensor-grid {
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--mobile-spacing-xl);
    padding: var(--mobile-spacing-xl);
  }
  
  .sensor-card {
    padding: var(--mobile-spacing-xl);
  }
  
  .sensor-card .sensor-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--mobile-spacing-lg);
  }
  
  .sensor-card .sensor-icon svg {
    width: 32px;
    height: 32px;
  }
  
  .sensor-card .sensor-value {
    font-size: clamp(2rem, 6vw, 2.5rem);
  }
  
  .sensor-card .sensor-title {
    font-size: 16px;
    margin-bottom: var(--mobile-spacing-sm);
  }
  
  .sensor-card .sensor-unit {
    font-size: 16px;
  }
  
  #city-search-container {
    width: 500px !important;
    padding: var(--mobile-spacing-lg) !important;
  }
  
  #city-search-container input {
    font-size: 18px !important;
    padding: var(--mobile-spacing-md) var(--mobile-spacing-lg) !important;
  }
  
  #city-search-container button {
    padding: var(--mobile-spacing-md) var(--mobile-spacing-lg) !important;
    font-size: 16px !important;
  }
  
  .btn-primary {
    padding: var(--mobile-spacing-md) var(--mobile-spacing-xl);
    font-size: 18px;
  }
  
  .back-to-map-btn {
    padding: var(--mobile-spacing-lg) var(--mobile-spacing-xl);
    font-size: 20px;
    min-height: 72px;
  }
  
  .language-option {
    padding: var(--mobile-spacing-md) var(--mobile-spacing-lg);
    font-size: 16px;
  }
}

/* Tall mobile screens (height > 2000px) - Optimized for 3088px height */
@media (min-height: 2000px) and (max-width: 1440px) {
  #content {
    padding-top: var(--mobile-spacing-xl);
    padding-bottom: var(--mobile-spacing-xl);
  }
  
  .sensor-grid {
    gap: var(--mobile-spacing-xl);
    padding: var(--mobile-spacing-xl);
  }
  
  #donation-section,
  #news-section {
    margin-bottom: var(--mobile-spacing-xl);
    padding: var(--mobile-spacing-xl);
  }
  
  #station-map {
    height: 50vh;
    min-height: 500px;
  }
  
  .enhanced-card {
    margin-bottom: var(--mobile-spacing-lg);
  }
}

/* Mobile landscape orientation */
@media (max-height: 1440px) and (orientation: landscape) {
  #station-map {
    height: 70vh;
  }
  
  .sensor-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--mobile-spacing-md);
  }
  
  #content {
    padding: var(--mobile-spacing-md);
  }
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  body::before {
    animation: none;
  }
}

/* Dark mode optimizations for mobile */
@media (prefers-color-scheme: dark) {
  .glass-mobile {
    background-color: rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.1);
  }
  
  .glass-mobile-strong {
    background-color: rgba(0, 0, 0, 0.4);
    border-color: rgba(255, 255, 255, 0.15);
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .glass,
  .glass-strong,
  .enhanced-card {
    background-color: rgba(255, 255, 255, 0.9);
    border: 2px solid #000;
    color: #000;
  }
  
  .btn-primary {
    border: 2px solid #000;
  }
}

/* Print styles for mobile */
@media print {
  body::before {
    display: none;
  }
  
  .glass,
  .glass-strong,
  .enhanced-card {
    background: white;
    border: 1px solid #000;
    box-shadow: none;
  }
  
  .btn-primary,
  .paypal-button,
  .back-to-map-btn {
    background: white !important;
    color: black !important;
    border: 1px solid #000 !important;
  }
  
  .sensor-grid {
    background: white;
    border: 1px solid #000;
  }
}