/* Google Fonts: Outfit for Headings, Inter for Body */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  /* Color Space: OKLCH for high chroma and modern vibrancy */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-display: 'Outfit', var(--font-sans);

  /* Light Theme Variables */
  --bg-color-light: oklch(0.98 0.01 240);
  --text-color-light: oklch(0.25 0.02 240);
  --primary-light: oklch(0.45 0.20 260);
  --primary-hover-light: oklch(0.38 0.18 260);
  --accent-light: oklch(0.48 0.20 320);
  --card-bg-light: rgba(255, 255, 255, 0.7);
  --card-border-light: rgba(0, 0, 0, 0.08);
  --shadow-color-light: rgba(0, 0, 0, 0.04);
  --input-bg-light: rgba(0, 0, 0, 0.03);
  --badge-bg-light: oklch(0.92 0.03 260);
  --badge-text-light: oklch(0.45 0.18 260);

  /* Dark Theme Variables (Default) */
  --bg-color-dark: oklch(0.12 0.015 240);
  --text-color-dark: oklch(0.93 0.01 240);
  --primary-dark: oklch(0.68 0.18 250);
  --primary-hover-dark: oklch(0.75 0.16 250);
  --accent-dark: oklch(0.72 0.18 310);
  --card-bg-dark: rgba(25, 25, 35, 0.45);
  --card-border-dark: rgba(255, 255, 255, 0.07);
  --shadow-color-dark: rgba(0, 0, 0, 0.3);
  --input-bg-dark: rgba(255, 255, 255, 0.04);
  --badge-bg-dark: oklch(0.22 0.05 250);
  --badge-text-dark: oklch(0.78 0.12 250);

  /* Dynamic variables that adapt via light-dark() or JS class updates */
  --bg-color: var(--bg-color-dark);
  --text-color: var(--text-color-dark);
  --primary: var(--primary-dark);
  --primary-hover: var(--primary-hover-dark);
  --accent: var(--accent-dark);
  --card-bg: var(--card-bg-dark);
  --card-border: var(--card-border-dark);
  --shadow-color: var(--shadow-color-dark);
  --input-bg: var(--input-bg-dark);
  --badge-bg: var(--badge-bg-dark);
  --badge-text: var(--badge-text-dark);
  
  --glass-blur: 16px;
  --transition-speed: 0.3s;
  --border-radius: 16px;

  /* Automatic configuration */
  color-scheme: dark light;
}

/* Light Theme Override Class */
:root[data-theme="light"] {
  --bg-color: var(--bg-color-light);
  --text-color: var(--text-color-light);
  --primary: var(--primary-light);
  --primary-hover: var(--primary-hover-light);
  --accent: var(--accent-light);
  --card-bg: var(--card-bg-light);
  --card-border: var(--card-border-light);
  --shadow-color: var(--shadow-color-light);
  --input-bg: var(--input-bg-light);
  --badge-bg: var(--badge-bg-light);
  --badge-text: var(--badge-text-light);
}

/* System-level Theme Fallbacks if JS is disabled */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg-color: var(--bg-color-light);
    --text-color: var(--text-color-light);
    --primary: var(--primary-light);
    --primary-hover: var(--primary-hover-light);
    --accent: var(--accent-light);
    --card-bg: var(--card-bg-light);
    --card-border: var(--card-border-light);
    --shadow-color: var(--shadow-color-light);
    --input-bg: var(--input-bg-light);
    --badge-bg: var(--badge-bg-light);
    --badge-text: var(--badge-text-light);
  }
}

/* Base resets & styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

/* Typography styling */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 0.5rem;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 0.5rem;
  margin-top: 2rem;
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.4rem;
  margin-top: 1rem;
}

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

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

p {
  margin-bottom: 1rem;
  opacity: 0.9;
}

/* Glassmorphism Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--card-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--card-border);
  transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.8rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-color);
  opacity: 0.8;
}

.nav-links a:hover,
.nav-links a.active {
  opacity: 1;
  color: var(--primary);
}

/* Theme Toggle button */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-color);
  padding: 0.5rem;
  border-radius: 50%;
  cursor: pointer;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-speed), transform var(--transition-speed);
}

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

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Main Content Wrapper */
main {
  flex: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 1rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  left: 20%;
  width: 40%;
  height: 60%;
  background: radial-gradient(circle, rgba(var(--primary), 0.15) 0%, transparent 70%);
  z-index: -1;
  filter: blur(80px);
}

.hero p.tagline {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 1rem auto 2rem;
  opacity: 0.7;
}

/* Search bar design */
.search-container {
  max-width: 600px;
  margin: 0 auto 3rem;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 1.25rem 1.5rem 1.25rem 3.5rem;
  border-radius: 50px;
  border: 1px solid var(--card-border);
  background-color: var(--card-bg);
  color: var(--text-color);
  font-size: 1.1rem;
  backdrop-filter: blur(var(--glass-blur));
  outline: none;
  box-shadow: 0 8px 32px var(--shadow-color);
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 8px 32px rgba(var(--primary-dark), 0.15), 0 0 0 3px rgba(var(--primary-dark), 0.1);
}

.search-icon {
  position: absolute;
  left: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.5rem;
  height: 1.5rem;
  opacity: 0.5;
  color: var(--text-color);
  pointer-events: none;
}

/* Filters & Navigation Tabs */
.tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.tab-btn {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-color);
  padding: 0.6rem 1.5rem;
  border-radius: 30px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.tab-btn:hover {
  background-color: var(--input-bg);
}

.tab-btn.active {
  background-color: var(--primary);
  color: var(--bg-color);
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Responsive Grid layouts */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

/* Premium Card Design */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: 0 10px 30px var(--shadow-color);
  transition: transform var(--transition-speed) cubic-bezier(0.16, 1, 0.3, 1), 
              border-color var(--transition-speed) ease,
              box-shadow var(--transition-speed) ease;
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--primary);
  box-shadow: 0 15px 35px var(--shadow-color), 0 0 10px rgba(var(--primary-dark), 0.1);
}

.card-tag {
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  background-color: var(--badge-bg);
  color: var(--badge-text);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.card-title {
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
}

.card-description {
  font-size: 0.95rem;
  opacity: 0.8;
  margin-bottom: 1.5rem;
  flex: 1;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  border-top: 1px solid var(--card-border);
  padding-top: 1rem;
}

.rating {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 600;
}

.rating svg {
  width: 16px;
  height: 16px;
  fill: #ffd700;
}

.price {
  font-size: 0.9rem;
  opacity: 0.8;
}

.price span {
  font-weight: 700;
  color: var(--primary);
}

/* Button & CTA styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-family: var(--font-display);
  cursor: pointer;
  transition: all var(--transition-speed) ease;
  border: none;
  gap: 0.5rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.btn-primary:hover {
  opacity: 0.95;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.2);
}

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

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

.sponsor-badge {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
}

/* Layout section adjustments */
section {
  margin-bottom: 4rem;
}

/* Footer styling */
footer {
  background-color: var(--card-bg);
  border-top: 1px solid var(--card-border);
  padding: 3rem 2rem;
  margin-top: auto;
  backdrop-filter: blur(var(--glass-blur));
  transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  color: var(--text-color);
  opacity: 0.7;
}

.footer-links a:hover {
  opacity: 1;
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--card-border);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  opacity: 0.85;
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Tool Specific General Elements */
.tool-container {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius);
  padding: 2.5rem;
  box-shadow: 0 15px 40px var(--shadow-color);
  margin-bottom: 3rem;
  backdrop-filter: blur(var(--glass-blur));
}

.tool-header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 1.5rem;
}

.tool-instructions {
  margin-bottom: 2rem;
  padding: 1rem;
  border-radius: 8px;
  background-color: var(--input-bg);
  font-size: 0.95rem;
}

.tool-faq {
  margin-top: 3rem;
}

.faq-item {
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 1rem;
}

.faq-question {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.faq-answer {
  opacity: 0.85;
}

/* Breadcrumbs style */
.breadcrumbs {
  display: flex;
  gap: 0.5rem;
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
}

.breadcrumbs a {
  color: var(--text-color);
  opacity: 0.85;
  text-decoration: none;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

.breadcrumbs span {
  color: var(--text-color);
  opacity: 0.7;
}

.breadcrumbs span:last-child {
  opacity: 1;
  font-weight: 600;
}

/* Input Fields & Form Elements globally styled */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--input-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text-color);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition-speed);
}

.form-control:focus {
  border-color: var(--primary);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
}

/* Tables for reviews */
.comparison-table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: var(--border-radius);
  border: 1px solid var(--card-border);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  background-color: var(--card-bg);
}

.comparison-table th, 
.comparison-table td {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--card-border);
}

.comparison-table th {
  background-color: var(--input-bg);
  font-weight: 700;
}

.comparison-table tr:hover {
  background-color: var(--input-bg);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    gap: 1rem;
  }
  .nav-links {
    width: 100%;
    justify-content: center;
  }
  .footer-top {
    flex-direction: column;
    align-items: center;
  }
  .footer-links {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
}