/* Asphapro.com - Main Stylesheet */
/* Mobile-first, responsive design */

/* ==================== CSS Variables ==================== */
:root {
  /* Colors - Light Mode */
  --primary-color: #1a73e8;
  --primary-dark: #1557b0;
  --primary-light: #4285f4;
  --secondary-color: #34a853;
  --accent-color: #fbbc04;
  --danger-color: #ea4335;

  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e8eaed;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --text-tertiary: #80868b;
  --border-color: #dadce0;
  --shadow-sm: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
  --shadow-md: 0 1px 3px 0 rgba(60, 64, 67, 0.3), 0 4px 8px 3px rgba(60, 64, 67, 0.15);
  --shadow-lg: 0 2px 6px 2px rgba(60, 64, 67, 0.15), 0 8px 24px 4px rgba(60, 64, 67, 0.15);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: 'Roboto Mono', 'Courier New', monospace;

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

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --bg-primary: #202124;
  --bg-secondary: #292a2d;
  --bg-tertiary: #35363a;
  --text-primary: #e8eaed;
  --text-secondary: #9aa0a6;
  --text-tertiary: #5f6368;
  --border-color: #3c4043;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3), 0 1px 3px 1px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 4px 8px 3px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 2px 6px 2px rgba(0, 0, 0, 0.15), 0 8px 24px 4px rgba(0, 0, 0, 0.15);
}

/* ==================== Reset & Base ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ==================== Typography ==================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 {
  font-size: 2rem;
  font-weight: 700;
}

h2 {
  font-size: 1.75rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

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

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

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

/* ==================== Layout ==================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-2xl) 0;
}

/* ==================== Header & Navigation ==================== */
header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-normal);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo:hover {
  text-decoration: none;
  color: var(--primary-dark);
}

.logo-icon {
  font-size: 1.75rem;
}

nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

nav a {
  color: var(--text-primary);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

nav a:hover {
  background-color: var(--bg-secondary);
  text-decoration: none;
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 1.25rem;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background-color: var(--bg-secondary);
  transform: scale(1.05);
}

/* ==================== Hero Section ==================== */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: white;
  padding: var(--spacing-2xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: white;
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.hero p {
  color: rgba(255, 255, 255, 0.95);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
}

.hero-cta {
  display: inline-block;
  background-color: white;
  color: var(--primary-color);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1.125rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
}

/* ==================== Calculator Grid ==================== */
.calculator-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.calculator-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

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

.calculator-card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.calculator-card h3 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.calculator-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  flex-grow: 1;
  margin-bottom: var(--spacing-md);
}

.calculator-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--primary-color);
  font-weight: 500;
  font-size: 0.9375rem;
}

.calculator-card-link:hover {
  text-decoration: none;
  gap: var(--spacing-md);
}

/* ==================== Calculator Form ==================== */
.calculator-container {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xl);
  border: 1px solid var(--border-color);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  font-size: 0.9375rem;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

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

.input-suffix {
  position: relative;
}

.input-suffix input {
  padding-right: 3rem;
}

.input-suffix::after {
  content: attr(data-suffix);
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  font-size: 0.875rem;
  pointer-events: none;
}

/* Buttons */
.btn {
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-family: var(--font-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

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

.btn-group {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* Results Section */
.results-container {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
  border-radius: var(--radius-lg);
  color: white;
  box-shadow: var(--shadow-md);
  display: none;
  animation: slideIn 0.3s ease-out;
}

.results-container.show {
  display: block;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.result-item {
  background-color: rgba(255, 255, 255, 0.15);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  backdrop-filter: blur(10px);
}

.result-label {
  font-size: 0.875rem;
  opacity: 0.9;
  margin-bottom: var(--spacing-xs);
}

.result-value {
  font-size: 1.75rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.result-unit {
  font-size: 0.875rem;
  opacity: 0.8;
  margin-left: var(--spacing-xs);
}

/* ==================== Ad Placeholders ==================== */
.ad-container {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg);
  background-color: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ad-placeholder {
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.ad-top-banner {
  min-height: 90px;
}

.ad-inline {
  min-height: 250px;
}

/* Floating Mobile Banner */
.ad-floating-mobile {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 999;
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  display: none;
  padding: var(--spacing-sm);
}

.ad-floating-mobile.show {
  display: block;
  animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
  }

  to {
    transform: translateY(0);
  }
}

.ad-floating-content {
  position: relative;
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ad-close-btn {
  position: absolute;
  top: -8px;
  right: 0;
  background-color: var(--bg-tertiary);
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.75rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.ad-close-btn:hover {
  background-color: var(--danger-color);
  color: white;
}

/* ==================== Related Calculators ==================== */
.related-calculators {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.related-calculators h2 {
  margin-bottom: var(--spacing-lg);
}

.related-links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.related-link {
  padding: var(--spacing-md);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.related-link:hover {
  border-color: var(--primary-color);
  transform: translateX(4px);
  text-decoration: none;
}

/* ==================== Sidebar Layout ==================== */
.content-wrapper {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--spacing-xl);
  align-items: start;
}

.main-content {
  min-width: 0;
  /* Prevents overflow */
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.sidebar-ad {
  background-color: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-fast);
}

.sidebar-ad:hover {
  border-color: var(--primary-light);
}

/* Sidebar ad sizes */
.sidebar-ad-top {
  min-height: 250px;
  /* 300x250 */
  position: sticky;
  top: 90px;
  /* Sticky - follows scroll */
}

.sidebar-ad-bottom {
  min-height: 600px;
  /* 300x600 */
  /* Not sticky - scrolls naturally */
}

/* Hide sidebar on tablet and mobile */
@media (max-width: 1024px) {
  .content-wrapper {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: none;
  }
}

/* ==================== Footer ==================== */
footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

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

.footer-section h3 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--spacing-sm);
}

.footer-section a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

/* ==================== Responsive Design ==================== */
@media (max-width: 768px) {

  /* Typography adjustments */
  h1 {
    font-size: 1.75rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  /* Header and Navigation - Better mobile experience */
  .header-content {
    padding: var(--spacing-sm) 0;
  }

  .logo {
    font-size: 1.25rem;
  }

  .logo-icon {
    font-size: 1.5rem;
  }

  nav ul {
    gap: var(--spacing-xs);
  }

  nav a {
    padding: var(--spacing-sm);
    font-size: 0.8125rem;
  }

  /* Larger touch targets for mobile */
  .theme-toggle {
    min-width: 44px;
    min-height: 44px;
    padding: var(--spacing-sm);
  }

  /* Hero section mobile optimization */
  .hero {
    padding: var(--spacing-xl) 0;
  }

  .hero p {
    font-size: 1rem;
    padding: 0 var(--spacing-md);
  }

  /* Calculator grid - single column on mobile */
  .calculator-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  /* Calculator container - better mobile padding */
  .calculator-container {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
  }

  /* Form improvements for mobile */
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .form-group {
    margin-bottom: var(--spacing-md);
  }

  .form-group input,
  .form-group select {
    font-size: 16px;
    /* Prevents zoom on iOS */
    min-height: 44px;
    /* Better touch target */
  }

  /* Button improvements */
  .btn-group {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .btn {
    width: 100%;
    min-height: 48px;
    /* Better touch target */
    font-size: 1rem;
  }

  /* Results grid - single column */
  .results-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .result-item {
    padding: var(--spacing-md);
  }

  .result-value {
    font-size: 1.5rem;
  }

  /* Related calculators - single column */
  .related-links {
    grid-template-columns: 1fr;
  }

  .related-link {
    min-height: 44px;
    /* Better touch target */
  }

  /* Footer - single column */
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  /* Section padding adjustments */
  .section {
    padding: var(--spacing-xl) 0;
  }

  /* Container padding on mobile */
  .container {
    padding: 0 var(--spacing-md);
  }

  /* Ad containers - better mobile sizing */
  .ad-top-banner {
    min-height: 50px;
  }

  .ad-inline {
    min-height: 250px;
  }

  /* Show floating mobile ad only on mobile */
  .ad-floating-mobile.show {
    display: block;
  }

  /* Ensure floating ad doesn't cover content */
  body.has-floating-ad {
    padding-bottom: 80px;
  }
}

/* Tablet optimization */
@media (min-width: 769px) and (max-width: 1024px) {
  .calculator-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (min-width: 769px) {

  /* Hide floating mobile ad on desktop */
  .ad-floating-mobile {
    display: none !important;
  }
}

/* ==================== Utilities ==================== */
.text-center {
  text-align: center;
}

.mt-1 {
  margin-top: var(--spacing-sm);
}

.mt-2 {
  margin-top: var(--spacing-md);
}

.mt-3 {
  margin-top: var(--spacing-lg);
}

.mt-4 {
  margin-top: var(--spacing-xl);
}

.mb-1 {
  margin-bottom: var(--spacing-sm);
}

.mb-2 {
  margin-bottom: var(--spacing-md);
}

.mb-3 {
  margin-bottom: var(--spacing-lg);
}

.mb-4 {
  margin-bottom: var(--spacing-xl);
}

.hidden {
  display: none;
}

/* Print Styles */
@media print {

  header,
  footer,
  .ad-container,
  .related-calculators,
  .theme-toggle {
    display: none;
  }

  body {
    background-color: white;
    color: black;
  }

  .calculator-container {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}

/* ==================== Hide Ads When Disabled ==================== */
/* When ads are disabled in config.js, hide all ad containers */
body.ads-disabled .ad-container,
body.ads-disabled .sidebar-ad,
body.ads-disabled .ad-placeholder,
body.ads-disabled #ad-top-banner,
body.ads-disabled #ad-sidebar-top,
body.ads-disabled #ad-sidebar-bottom,
body.ads-disabled #ad-in-content {
  display: none !important;
}

/* Adjust sidebar when ads are hidden */
body.ads-disabled .sidebar {
  display: none;
}

/* Make main content full width when sidebar is hidden */
body.ads-disabled .content-wrapper {
  grid-template-columns: 1fr;
}

body.ads-disabled .main-content {
  max-width: 100%;
}