/* ==========================================================================
   PREMIUM MICRO-UTILITIES SYSTEM - GLOBAL STYLES & LAYOUT
   ========================================================================== */

/* --- Google Fonts Import --- */
@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');

/* --- Design Tokens --- */
:root {
  /* Fonts */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* HSL Core Palette (Indigo, Teal, Pink Accents) */
  --primary-hue: 250;
  --primary-saturation: 84%;
  --primary-lightness: 54%;
  --primary: hsl(var(--primary-hue), var(--primary-saturation), var(--primary-lightness));
  --primary-hover: hsl(var(--primary-hue), var(--primary-saturation), 46%);
  --primary-glow: hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.15);

  --secondary-hue: 174;
  --secondary-saturation: 90%;
  --secondary-lightness: 41%;
  --secondary: hsl(var(--secondary-hue), var(--secondary-saturation), var(--secondary-lightness));
  --secondary-hover: hsl(var(--secondary-hue), var(--secondary-saturation), 33%);
  --secondary-glow: hsla(var(--secondary-hue), var(--secondary-saturation), var(--secondary-lightness), 0.15);

  --accent-hue: 322;
  --accent-saturation: 85%;
  --accent-lightness: 58%;
  --accent: hsl(var(--accent-hue), var(--accent-saturation), var(--accent-lightness));

  /* Light Theme Interface */
  --bg-app: hsl(220, 33%, 97%);
  --bg-app-rgb: 240, 242, 247;
  --bg-card: hsla(0, 0%, 100%, 0.7);
  --bg-card-hover: hsla(0, 0%, 100%, 0.85);
  
  --border-card: hsla(220, 20%, 90%, 0.6);
  --border-card-hover: hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.35);
  
  --text-primary: hsl(224, 71%, 4%);
  --text-secondary: hsl(220, 10%, 42%);
  --text-muted: hsl(220, 8%, 62%);
  --text-on-primary: hsl(0, 0%, 100%);
  
  /* Inputs */
  --input-bg: hsla(0, 0%, 100%, 0.8);
  --input-border: hsl(220, 15%, 85%);
  --input-border-focus: hsl(var(--primary-hue), var(--primary-saturation), var(--primary-lightness));
  --input-focus-shadow: hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.15);
  
  /* Shadows */
  --shadow-sm: 0 2px 8px -1px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 12px 24px -4px rgba(0, 0, 0, 0.04), 0 4px 12px -2px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 24px 38px -4px rgba(22, 28, 45, 0.06), 0 8px 16px -4px rgba(22, 28, 45, 0.03);
  --shadow-glow: 0 0 20px -5px hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.25);
  
  /* Layout & Animations */
  --glass-blur: 16px;
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
  
  --max-width-container: 1200px;
}

/* --- Dark Theme Tokens --- */
[data-theme="dark"] {
  --primary-lightness: 60%;
  --primary: hsl(var(--primary-hue), var(--primary-saturation), var(--primary-lightness));
  --primary-hover: hsl(var(--primary-hue), var(--primary-saturation), 66%);
  --primary-glow: hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.25);

  --secondary-lightness: 46%;
  --secondary: hsl(var(--secondary-hue), var(--secondary-saturation), var(--secondary-lightness));
  --secondary-hover: hsl(var(--secondary-hue), var(--secondary-saturation), 52%);
  --secondary-glow: hsla(var(--secondary-hue), var(--secondary-saturation), var(--secondary-lightness), 0.25);

  --accent-lightness: 63%;
  --accent: hsl(var(--accent-hue), var(--accent-saturation), var(--accent-lightness));

  /* Dark Theme Interface */
  --bg-app: hsl(224, 71%, 4%);
  --bg-app-rgb: 3, 7, 18;
  --bg-card: hsla(222, 47%, 7%, 0.45);
  --bg-card-hover: hsla(222, 47%, 9%, 0.6);
  
  --border-card: hsla(217, 32%, 17%, 0.65);
  --border-card-hover: hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.45);

  --text-primary: hsl(210, 40%, 98%);
  --text-secondary: hsl(215, 20%, 78%);
  --text-muted: hsl(215, 14%, 55%);
  --text-on-primary: hsl(224, 71%, 4%);

  /* Inputs */
  --input-bg: hsla(222, 47%, 4%, 0.4);
  --input-border: hsla(217, 32%, 17%, 0.85);
  --input-border-focus: hsl(var(--primary-hue), var(--primary-saturation), var(--primary-lightness));
  --input-focus-shadow: hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.25);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 12px 24px -4px rgba(0, 0, 0, 0.45), 0 4px 12px -2px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 24px 38px -4px rgba(0, 0, 0, 0.6), 0 8px 16px -4px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 25px -5px hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.35);
}

/* ==========================================================================
   1. GLOBAL RESETS & GENERAL STYLES
   ========================================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  height: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-app);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* --- Decorative Blurred Ambient Blobs --- */
body::before, body::after {
  content: "";
  position: absolute;
  width: 35rem;
  height: 35rem;
  border-radius: 50%;
  filter: blur(120px);
  z-index: -1;
  opacity: 0.15;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

body::before {
  top: -10rem;
  right: -5rem;
  background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
}

body::after {
  bottom: -10rem;
  left: -5rem;
  background: radial-gradient(circle, var(--secondary) 0%, transparent 70%);
}

[data-theme="dark"]::before, [data-theme="dark"]::after {
  opacity: 0.25;
}

/* --- Custom Premium Scrollbar --- */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-app);
}

::-webkit-scrollbar-thumb {
  background: var(--border-card);
  border-radius: 5px;
  border: 2px solid var(--bg-app);
  transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.5);
}

/* --- Typography Defaults --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.03em;
}

h2 {
  font-size: 1.875rem;
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.5rem;
  letter-spacing: -0.01em;
}

p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

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

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

/* ==========================================================================
   2. CONTAINERS & LAYOUT GRIDS
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--max-width-container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Main Area & Footer standard spacing */
main {
  flex-grow: 1;
  padding: 2rem 0;
}

/* Primary Multi-Column Layout Grid for Utility Pages */
.layout-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 992px) {
  .layout-grid {
    grid-template-columns: 8fr 4fr; /* 8 columns content, 4 columns sidebar */
    align-items: start;
  }
  
  .layout-grid.no-sidebar {
    grid-template-columns: 1fr;
  }
}

/* Responsive grid for tools listing or mini cards */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

/* ==========================================================================
   3. NAVIGATION NAVBAR
   ========================================================================== */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: var(--bg-card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--border-card);
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* Premium gradient logo text */
.navbar-brand span {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.navbar-menu {
  display: none;
  align-items: center;
  gap: 2rem;
}

.navbar-link {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  position: relative;
  padding: 0.5rem 0;
}

.navbar-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
  transition: width var(--transition-normal);
}

.navbar-link:hover {
  color: var(--text-primary);
}

.navbar-link:hover::after,
.navbar-link.active::after {
  width: 100%;
}

.navbar-link.active {
  color: var(--text-primary);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Mobile Menu Toggle Button (Hamburger) */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 1.5rem;
  height: 1.125rem;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 101;
}

.mobile-menu-toggle span {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* Hamburger transition to 'X' */
.mobile-menu-toggle.open span:nth-child(1) {
  transform: translateY(4.5px) rotate(45deg);
}

.mobile-menu-toggle.open span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.open span:nth-child(3) {
  transform: translateY(-4.5px) rotate(-45deg);
}

@media (min-width: 768px) {
  .navbar-menu {
    display: flex;
  }
  
  .mobile-menu-toggle {
    display: none;
  }
}

/* Mobile Drawer Styles */
.mobile-drawer {
  position: fixed;
  top: 4.5rem;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-top: 1px solid var(--border-card);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  z-index: 99;
}

.mobile-drawer.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-drawer .navbar-link {
  font-size: 1.2rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-card);
}

/* ==========================================================================
   4. FOOTER LAYOUT
   ========================================================================== */

.footer {
  width: 100%;
  background: var(--bg-card);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-top: 1px solid var(--border-card);
  padding: 4rem 0 2rem 0;
  transition: background var(--transition-normal), border-color var(--transition-normal);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .footer-brand-col {
    grid-column: span 2;
  }
}

.footer-brand {
  margin-bottom: 1rem;
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 320px;
}

.footer-col-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: inline-block;
}

.footer-link:hover {
  color: var(--primary);
  transform: translateX(4px);
}

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

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

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-legal-links {
  display: flex;
  gap: 1.5rem;
}

.footer-legal-link {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-legal-link:hover {
  color: var(--text-secondary);
}

/* ==========================================================================
   5. AD BANNER SLOTS & STRUCTURAL PLACEMENT
   ========================================================================== */

/* Outer Ad Containers for structural layout */
.ad-slot-header {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  margin: 1.5rem 0;
  min-height: 90px;
  overflow: hidden;
}

.ad-slot-sidebar {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  margin: 1.5rem 0;
  min-height: 250px;
  position: sticky;
  top: 6rem; /* Lock relative to sticky navbar */
}

.ad-slot-inline {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  margin: 2rem 0;
  min-height: 100px;
}

/* ==========================================================================
   6. KEYFRAME MICRO-ANIMATIONS
   ========================================================================== */

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulseGlow {
  0% {
    box-shadow: 0 0 15px -5px hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.2);
  }
  50% {
    box-shadow: 0 0 25px 2px hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.4);
  }
  100% {
    box-shadow: 0 0 15px -5px hsla(var(--primary-hue), var(--primary-saturation), var(--primary-lightness), 0.2);
  }
}

@keyframes floatElement {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-6px); }
  100% { transform: translateY(0px); }
}

@keyframes gradientBgMove {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* --- Helper Classes for Animations --- */
.anim-fade-in {
  animation: fadeIn var(--transition-normal) forwards;
}

.anim-slide-up {
  animation: slideUp var(--transition-normal) cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.anim-float {
  animation: floatElement 4s ease-in-out infinite;
}

.anim-glow {
  animation: pulseGlow 3s ease-in-out infinite;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}