/**
 * ProShouters.com - Professional Audio Equipment CSS
 * Dark premium audio equipment aesthetic with sound wave motifs
 * 
 * Color Palette:
 * - Primary: #ff6b35 (vibrant orange - speaker cones)
 * - Secondary: #1a1a2e (deep navy/black)
 * - Accent: #ffd700 (gold - chrome speaker rings)
 * - Background: #0d0d14 (very dark)
 * - Card bg: #16162a
 * - Text: #e8e8e8
 * - Muted: #8888aa
 */

/* ============================================
   CSS CUSTOM PROPERTIES (Variables)
   ============================================ */
:root {
  /* Colors */
  --color-primary: #ff6b35;
  --color-primary-dark: #e55a2b;
  --color-primary-light: #ff8a5c;
  --color-secondary: #1a1a2e;
  --color-accent: #ffd700;
  --color-accent-dark: #e6c200;
  --color-background: #0d0d14;
  --color-card: #16162a;
  --color-card-hover: #1e1e38;
  --color-text: #e8e8e8;
  --color-text-muted: #8888aa;
  --color-border: #2a2a4a;
  --color-success: #4ade80;
  --color-error: #f87171;
  --color-warning: #fbbf24;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Inter', var(--font-primary);
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 20px rgba(255, 107, 53, 0.3);
  --shadow-gold: 0 0 20px rgba(255, 215, 0, 0.2);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* Z-index layers */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-tooltip: 600;
  
  /* Container widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1400px;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

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

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

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

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

.text-accent {
  color: var(--color-accent);
}

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

/* ============================================
   LAYOUT CONTAINERS
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-sm { max-width: var(--container-sm); }
.container-md { max-width: var(--container-md); }
.container-lg { max-width: var(--container-lg); }
.container-xl { max-width: var(--container-xl); }
.container-2xl { max-width: var(--container-2xl); }

.section {
  padding: var(--spacing-4xl) 0;
}

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

.section-lg {
  padding: var(--spacing-4xl) 0;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: linear-gradient(180deg, rgba(13, 13, 20, 0.98) 0%, rgba(13, 13, 20, 0.95) 100%);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-xl);
}

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

.navbar-logo .logo-icon {
  font-size: 1.5em;
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { 
    filter: drop-shadow(0 0 2px var(--color-primary));
  }
  50% { 
    filter: drop-shadow(0 0 8px var(--color-primary));
  }
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  list-style: none;
}

.navbar-nav a {
  color: var(--color-text-muted);
  font-weight: 500;
  padding: var(--spacing-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.navbar-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base);
}

.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--color-text);
}

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

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Mobile Menu Toggle */
.navbar-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.navbar-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.navbar-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar-toggle.active span:nth-child(2) {
  opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .navbar-toggle {
    display: flex;
  }
  
  .navbar-nav {
    position: fixed;
    top: 65px;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    background: var(--color-background);
    padding: var(--spacing-xl);
    gap: var(--spacing-lg);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    z-index: var(--z-fixed);
  }
  
  .navbar-nav.active {
    transform: translateX(0);
  }
  
  .navbar-nav a {
    font-size: var(--font-size-xl);
  }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-background) 0%, var(--color-secondary) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center top, rgba(255, 107, 53, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  padding: var(--spacing-2xl);
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 50%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto var(--spacing-2xl);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Sound Wave Decoration */
.sound-wave {
  position: absolute;
  bottom: 10%;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 60px;
  opacity: 0.3;
}

.sound-wave-bar {
  width: 4px;
  background: linear-gradient(to top, var(--color-primary), var(--color-accent));
  border-radius: 2px;
  animation: sound-wave 1.2s ease-in-out infinite;
}

.sound-wave-bar:nth-child(1) { height: 20%; animation-delay: 0s; }
.sound-wave-bar:nth-child(2) { height: 40%; animation-delay: 0.1s; }
.sound-wave-bar:nth-child(3) { height: 60%; animation-delay: 0.2s; }
.sound-wave-bar:nth-child(4) { height: 80%; animation-delay: 0.3s; }
.sound-wave-bar:nth-child(5) { height: 100%; animation-delay: 0.4s; }
.sound-wave-bar:nth-child(6) { height: 80%; animation-delay: 0.5s; }
.sound-wave-bar:nth-child(7) { height: 60%; animation-delay: 0.6s; }
.sound-wave-bar:nth-child(8) { height: 40%; animation-delay: 0.7s; }
.sound-wave-bar:nth-child(9) { height: 20%; animation-delay: 0.8s; }

@keyframes sound-wave {
  0%, 100% { transform: scaleY(0.5); }
  50% { transform: scaleY(1); }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  box-shadow: var(--shadow-md), 0 0 20px rgba(255, 107, 53, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(255, 107, 53, 0.4);
  color: white;
}

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

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

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

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  color: var(--color-secondary);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold);
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-full);
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
}

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

.card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.2) 0%, rgba(255, 215, 0, 0.1) 100%);
  border-radius: var(--radius-lg);
  font-size: 1.5rem;
}

.card-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-primary);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: 0;
}

.card-body {
  color: var(--color-text-muted);
}

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

/* ============================================
   TOOL CARDS GRID
   ============================================ */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.tool-card {
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.tool-card:hover::before {
  transform: scaleX(1);
}

.tool-card .card-icon {
  animation: icon-pulse 3s ease-in-out infinite;
}

@keyframes icon-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.tool-card:hover .card-icon {
  animation: none;
  transform: scale(1.1);
}

/* Category Tags */
.category-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: var(--radius-sm);
  background: rgba(255, 107, 53, 0.15);
  color: var(--color-primary);
}

.category-tag.speakers { background: rgba(255, 107, 53, 0.15); color: var(--color-primary); }
.category-tag.megaphones { background: rgba(255, 215, 0, 0.15); color: var(--color-accent); }
.category-tag.audio { background: rgba(74, 222, 128, 0.15); color: var(--color-success); }
.category-tag.calculators { background: rgba(136, 136, 170, 0.15); color: var(--color-text-muted); }

/* ============================================
   ARTICLE CARDS
   ============================================ */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-xl);
}

.article-card {
  display: flex;
  flex-direction: column;
}

.article-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-card) 100%);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.article-image::before {
  content: '🔊';
  font-size: 3rem;
  opacity: 0.2;
}

.article-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.article-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  transition: color var(--transition-fast);
}

.article-card:hover .article-title {
  color: var(--color-primary);
}

.article-excerpt {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  flex-grow: 1;
}

/* ============================================
   FEATURE GRID
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.feature-item {
  text-align: center;
  padding: var(--spacing-xl);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.1) 0%, rgba(255, 215, 0, 0.05) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  font-size: 2rem;
}

.feature-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.feature-description {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* ============================================
   TOOL PAGE STYLES
   ============================================ */
.tool-page {
  padding-top: var(--spacing-2xl);
}

.tool-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.tool-header h1 {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
}

.tool-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: start;
}

@media (max-width: 968px) {
  .tool-container {
    grid-template-columns: 1fr;
  }
}

.tool-panel {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
}

.tool-panel-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Input Controls */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

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

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.2);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238888aa' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* Range Slider */
.form-range {
  width: 100%;
  height: 6px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  appearance: none;
  cursor: pointer;
}

.form-range::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast);
}

.form-range::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.form-range::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-md);
}

/* Checkbox & Radio */
.form-checkbox,
.form-radio {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
}

.form-checkbox input,
.form-radio input {
  width: 20px;
  height: 20px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

/* Result Display */
.result-display {
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  margin-top: var(--spacing-lg);
}

.result-value {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.result-unit {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
}

.result-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--spacing-sm);
}

/* Canvas Area */
.canvas-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.canvas-container canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.canvas-overlay {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  display: flex;
  gap: var(--spacing-sm);
}

/* ============================================
   DATA TABLES
   ============================================ */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-card);
}

th, td {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  background: var(--color-secondary);
  font-weight: 700;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-muted);
}

tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: var(--color-card-hover);
}

.table-striped tbody tr:nth-child(odd) {
  background: rgba(255, 255, 255, 0.02);
}

.table-striped tbody tr:nth-child(odd):hover {
  background: var(--color-card-hover);
}

/* ============================================
   PAGE HEADER
   ============================================ */
.page-header {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(180deg, var(--color-secondary) 0%, var(--color-background) 100%);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-3xl);
}

.page-header-inner {
  text-align: center;
}

.page-title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
}

.page-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.breadcrumb a {
  color: var(--color-text-muted);
}

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

.breadcrumb-separator {
  opacity: 0.5;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--color-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-4xl) 0 var(--spacing-xl);
  margin-top: var(--spacing-4xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

@media (max-width: 968px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
}

.footer-description {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  line-height: 1.7;
}

.footer-column h4 {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text);
}

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

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

.footer-links a {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

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

.footer-social {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

@media (max-width: 640px) {
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
}

.footer-legal {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-legal a {
  color: var(--color-text-muted);
}

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

/* ============================================
   ADSENSE READY CLASSES
   ============================================ */
.ad-container {
  background: var(--color-card);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ad-container-responsive {
  max-width: 100%;
  overflow: hidden;
}

.ad-container-sidebar {
  min-height: 600px;
}

.google-ad {
  display: block;
  margin: var(--spacing-2xl) auto;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slide-up {
  from { 
    opacity: 0;
    transform: translateY(20px);
  }
  to { 
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slide-in-right {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-fade-in {
  animation: fade-in var(--transition-slow) ease-out;
}

.animate-slide-up {
  animation: slide-up var(--transition-slow) ease-out;
}

.animate-slide-in-right {
  animation: slide-in-right var(--transition-slow) ease-out;
}

/* Staggered animations for grids */
.stagger-animation > *:nth-child(1) { animation-delay: 0ms; }
.stagger-animation > *:nth-child(2) { animation-delay: 100ms; }
.stagger-animation > *:nth-child(3) { animation-delay: 200ms; }
.stagger-animation > *:nth-child(4) { animation-delay: 300ms; }
.stagger-animation > *:nth-child(5) { animation-delay: 400ms; }
.stagger-animation > *:nth-child(6) { animation-delay: 500ms; }
.stagger-animation > *:nth-child(7) { animation-delay: 600ms; }
.stagger-animation > *:nth-child(8) { animation-delay: 700ms; }

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Mobile: 0 - 639px */
@media (max-width: 639px) {
  :root {
    --font-size-5xl: 2.25rem;
    --font-size-4xl: 1.875rem;
    --font-size-3xl: 1.5rem;
  }
  
  .section {
    padding: var(--spacing-2xl) 0;
  }
  
  .hero {
    min-height: 70vh;
    padding: var(--spacing-2xl) 0;
  }
  
  .hero-content {
    padding: var(--spacing-lg);
  }
  
  .tools-grid,
  .articles-grid {
    grid-template-columns: 1fr;
  }
  
  .tool-container {
    grid-template-columns: 1fr;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .table-container {
    font-size: var(--font-size-sm);
  }
  
  th, td {
    padding: var(--spacing-sm) var(--spacing-md);
  }
}

/* Tablet: 640px - 1023px */
@media (min-width: 640px) and (max-width: 1023px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Desktop: 1024px and up */
@media (min-width: 1024px) {
  .container {
    padding: 0 var(--spacing-2xl);
  }
}

/* Large Desktop: 1280px and up */
@media (min-width: 1280px) {
  .hero-title {
    font-size: 4.5rem;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-bold { font-weight: 700; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }
.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.w-full { width: 100%; }

/* ============================================
   SPEAKER/AUDIO DECORATIVE ELEMENTS
   ============================================ */

/* Speaker cone gradient backgrounds */
.speaker-cone-bg {
  background: radial-gradient(ellipse at center, rgba(255, 107, 53, 0.15) 0%, transparent 70%);
}

.speaker-ring {
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  box-shadow: inset 0 0 10px rgba(255, 215, 0, 0.1), 0 0 10px rgba(255, 215, 0, 0.1);
}

/* Audio wave patterns */
.audio-wave-pattern {
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-primary) 0px,
    var(--color-primary) 2px,
    transparent 2px,
    transparent 6px
  );
  height: 4px;
  border-radius: 2px;
}

/* Sound frequency bars decoration */
.freq-bars {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 24px;
}

.freq-bar {
  width: 4px;
  background: linear-gradient(to top, var(--color-primary), var(--color-accent));
  border-radius: 2px;
}

.freq-bar:nth-child(1) { height: 8px; }
.freq-bar:nth-child(2) { height: 14px; }
.freq-bar:nth-child(3) { height: 20px; }
.freq-bar:nth-child(4) { height: 12px; }
.freq-bar:nth-child(5) { height: 18px; }

/* ============================================
   LOADING STATES
   ============================================ */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-card) 25%,
    var(--color-card-hover) 50%,
    var(--color-card) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

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

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================
   TOOLTIPS
   ============================================ */
[data-tooltip] {
  position: relative;
  cursor: help;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-secondary);
  color: var(--color-text);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-md);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: var(--z-tooltip);
  border: 1px solid var(--color-border);
}

[data-tooltip]:hover::after {
  opacity: 1;
  visibility: visible;
  bottom: calc(100% + 8px);
}

/* ============================================
   BADGES
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: white;
}

.badge-secondary {
  background: var(--color-card);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.badge-success {
  background: rgba(74, 222, 128, 0.2);
  color: var(--color-success);
}

.badge-warning {
  background: rgba(251, 191, 36, 0.2);
  color: var(--color-warning);
}

.badge-error {
  background: rgba(248, 113, 113, 0.2);
  color: var(--color-error);
}

/* ============================================
   ALERTS / NOTIFICATIONS
   ============================================ */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid;
  margin-bottom: var(--spacing-lg);
}

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  border-color: rgba(59, 130, 246, 0.3);
  color: #60a5fa;
}

.alert-success {
  background: rgba(74, 222, 128, 0.1);
  border-color: rgba(74, 222, 128, 0.3);
  color: var(--color-success);
}

.alert-warning {
  background: rgba(251, 191, 36, 0.1);
  border-color: rgba(251, 191, 36, 0.3);
  color: var(--color-warning);
}

.alert-error {
  background: rgba(248, 113, 113, 0.1);
  border-color: rgba(248, 113, 113, 0.3);
  color: var(--color-error);
}

/* ============================================
   CUSTOM SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
  border: 2px solid var(--color-background);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ============================================
   SELECTION STYLES
   ============================================ */
::selection {
  background: rgba(255, 107, 53, 0.3);
  color: var(--color-text);
}

::-moz-selection {
  background: rgba(255, 107, 53, 0.3);
  color: var(--color-text);
}

/* ============================================
   FOCUS STYLES (Accessibility)
   ============================================ */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  .navbar,
  .footer,
  .btn,
  .ad-container {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .card {
    border: 1px solid #ddd;
    box-shadow: none;
  }
}