/* Stay Cool UK - Standalone Landing Page Styles */

:root {
  /* Color Palette - Cold / Cool Theme */
  --hue-primary: 215;
  --hue-accent: 190;
  
  /* Light Theme (Defaults) */
  --color-primary: hsl(var(--hue-primary), 60%, 16%);
  --color-primary-light: hsl(var(--hue-primary), 50%, 25%);
  --color-primary-subtle: hsl(var(--hue-primary), 40%, 95%);
  
  --color-accent: hsl(var(--hue-accent), 95%, 42%);
  --color-accent-hover: hsl(var(--hue-accent), 100%, 35%);
  --color-accent-subtle: hsl(var(--hue-accent), 80%, 94%);
  
  --bg-base: hsl(var(--hue-primary), 25%, 98%);
  --bg-surface: hsl(0, 0%, 100%);
  --bg-surface-subtle: hsl(var(--hue-primary), 20%, 94%);
  --bg-glass: rgba(255, 255, 255, 0.85);
  
  --border-color: hsl(var(--hue-primary), 20%, 88%);
  --border-color-subtle: hsl(var(--hue-primary), 15%, 93%);
  
  --text-main: hsl(var(--hue-primary), 35%, 15%);
  --text-muted: hsl(var(--hue-primary), 15%, 45%);
  
  --shadow-sm: 0 2px 4px rgba(10, 25, 47, 0.05);
  --shadow-md: 0 4px 12px rgba(10, 25, 47, 0.08);
  --shadow-lg: 0 12px 24px rgba(10, 25, 47, 0.12);
  --shadow-glass: 0 8px 32px 0 rgba(10, 25, 47, 0.06);

  /* Fonts */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: 'Outfit', var(--font-sans);
  
  /* Utilities */
  --border-radius-sm: 8px;
  --border-radius-md: 14px;
  --border-radius-lg: 24px;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme Overrides */
.dark-theme {
  --color-primary: hsl(var(--hue-primary), 40%, 90%);
  --color-primary-light: hsl(var(--hue-primary), 30%, 80%);
  --color-primary-subtle: hsl(var(--hue-primary), 30%, 15%);
  
  --color-accent: hsl(var(--hue-accent), 90%, 48%);
  --color-accent-hover: hsl(var(--hue-accent), 100%, 55%);
  --color-accent-subtle: hsl(var(--hue-accent), 40%, 12%);
  
  --bg-base: hsl(var(--hue-primary), 40%, 7%);
  --bg-surface: hsl(var(--hue-primary), 35%, 11%);
  --bg-surface-subtle: hsl(var(--hue-primary), 30%, 15%);
  --bg-glass: rgba(13, 27, 49, 0.85);
  
  --border-color: hsl(var(--hue-primary), 30%, 20%);
  --border-color-subtle: hsl(var(--hue-primary), 25%, 16%);
  
  --text-main: hsl(var(--hue-primary), 15%, 88%);
  --text-muted: hsl(var(--hue-primary), 10%, 65%);
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.4);
  --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Typography styling */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
}

p {
  color: var(--text-muted);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-normal);
}

a:hover {
  color: var(--color-accent-hover);
}

/* Layout Elements */
.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  padding: 24px 0;
  border-bottom: 1px solid var(--border-color-subtle);
  background-color: var(--bg-glass);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.logo-accent {
  color: var(--color-accent);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 1px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.badge-soon {
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
  padding: 4px 10px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
}

/* Sun/Moon Toggle */
.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.theme-toggle-btn:hover {
  background-color: var(--bg-surface-subtle);
}

.theme-toggle-btn .sun-icon { display: none; }
.theme-toggle-btn .moon-icon { display: block; }
.dark-theme .theme-toggle-btn .sun-icon { display: block; }
.dark-theme .theme-toggle-btn .moon-icon { display: none; }

/* Hero Section */
.hero {
  padding: 80px 0 60px 0;
  text-align: center;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  letter-spacing: -1px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text-main) 40%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: clamp(16px, 2.5vw, 19px);
  max-width: 680px;
  margin: 0 auto 36px auto;
  line-height: 1.5;
}

/* Coming Soon Notice */
.coming-soon-notice {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 14px 28px;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0 auto;
}

.pulse-dot {
  width: 10px;
  height: 10px;
  background-color: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(0, 180, 216, 0.7);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(0, 180, 216, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 8px rgba(0, 180, 216, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(0, 180, 216, 0);
  }
}

/* Feature Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 60px;
}

.feature-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 30px;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

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

.feature-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 15px;
  color: var(--text-muted);
}

/* Interactive Calculator Widget Box */
.interactive-widget {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color-subtle);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: 40px;
  margin-bottom: 60px;
}

.widget-header {
  margin-bottom: 28px;
}

.widget-header h2 {
  font-size: 26px;
  margin-bottom: 8px;
}

.widget-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

@media (max-width: 768px) {
  .widget-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .interactive-widget {
    padding: 24px;
  }
}

.widget-inputs {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  justify-content: space-between;
}

.form-group label span.val-label {
  color: var(--color-accent);
  font-weight: 700;
}

.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 5px;
  background: var(--bg-surface-subtle);
  outline: none;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.widget-outputs {
  background-color: var(--bg-surface-subtle);
  border-radius: var(--border-radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.output-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color-subtle);
}

.output-row:last-child {
  border-bottom: none;
  padding-top: 16px;
}

.output-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
}

.output-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
}

.output-value.highlight {
  font-size: 28px;
  color: var(--color-accent);
  font-family: var(--font-heading);
}

.widget-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 16px;
  line-height: 1.4;
}

/* Footer styling */
.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-color-subtle);
  text-align: center;
  background-color: var(--bg-surface);
}

.site-footer p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.site-footer .disclosure {
  font-size: 12px;
  max-width: 600px;
  margin: 12px auto 0 auto;
  line-height: 1.4;
}