/* ===========================
   CSS VARIABLES - Industrial Workshop Theme
   =========================== */
:root {
  /* Colors */
  --dark-asphalt: #2a2a2a;
  --deep-charcoal: #1a1a1a;
  --warm-orange: #ff6b35;
  --warm-orange-light: #ff8c42;
  --metallic-silver: #b8b8b8;
  --metallic-grey: #e0e0e0;
  --white-text: #ffffff;
  
  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 20px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  
  /* Border Radius */
  --radius: 12px;
  
  /* Shadows */
  --shadow: 0 4px 6px rgba(0,0,0,0.3);
  --shadow-hover: 0 8px 12px rgba(0,0,0,0.4);
  
  /* Transitions */
  --transition: 150ms ease;
  --transition-slow: 200ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--deep-charcoal);
  color: var(--white-text);
  line-height: 1.6;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

button {
  cursor: pointer;
  border: none;
  font-family: inherit;
}

ul {
  list-style: none;
}

/* ===========================
   TYPOGRAPHY
   =========================== */
h1, h2, h3, h4, h5, h6 {
  margin-bottom: var(--spacing-md);
  font-weight: 700;
  line-height: 1.3;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

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

/* ===========================
   HEADER & NAVIGATION
   =========================== */
.header {
  background: linear-gradient(135deg, var(--dark-asphalt) 0%, var(--deep-charcoal) 100%);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
  border-bottom: 2px solid var(--warm-orange);
}

.header.scrolled {
  background: rgba(26, 26, 26, 0.98);
  backdrop-filter: blur(10px);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--warm-orange);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo svg {
  width: 36px;
  height: 36px;
  stroke: var(--warm-orange);
}

.nav-menu {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--metallic-grey);
  font-weight: 500;
  position: relative;
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--warm-orange);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--warm-orange);
  transition: var(--transition);
}

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

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  cursor: pointer;
  z-index: 1001;
}

.burger span {
  width: 28px;
  height: 3px;
  background: var(--warm-orange);
  transition: var(--transition);
  border-radius: 2px;
}

.burger.active span:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

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

.burger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* ===========================
   HERO SECTION
   =========================== */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--dark-asphalt) 0%, #1f1f1f 50%, var(--deep-charcoal) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(45deg, transparent 30%, rgba(255, 107, 53, 0.03) 40%, transparent 50%),
    linear-gradient(-45deg, transparent 30%, rgba(255, 140, 66, 0.02) 40%, transparent 50%);
  background-size: 100px 100px;
  animation: diagonalMove 20s linear infinite;
  z-index: 1;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('../assets/images/modern_organized_workshop_workbench_tools_hero_image.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
  z-index: 0;
}

@keyframes diagonalMove {
  0% { background-position: 0 0; }
  100% { background-position: 100px 100px; }
}

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

.hero h1 {
  margin-bottom: var(--spacing-md);
  text-shadow: 2px 2px 8px rgba(0,0,0,0.7);
  color: var(--white-text);
}

.hero p {
  font-size: 1.25rem;
  color: var(--metallic-grey);
  margin-bottom: var(--spacing-lg);
  text-shadow: 1px 1px 4px rgba(0,0,0,0.7);
}

.cta-button {
  display: inline-block;
  padding: 16px 40px;
  background: linear-gradient(135deg, var(--warm-orange) 0%, var(--warm-orange-light) 100%);
  color: var(--white-text);
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: all var(--transition-slow);
  border: 2px solid transparent;
}

.cta-button:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--white-text);
}

.cta-button:active {
  transform: translateY(-2px);
}

/* ===========================
   CONTAINER
   =========================== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--warm-orange);
}

/* ===========================
   STATS SECTION
   =========================== */
.stats-section {
  background: var(--dark-asphalt);
  padding: var(--spacing-xl) 0;
  border-top: 2px solid var(--warm-orange);
  border-bottom: 2px solid var(--warm-orange);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.stat-card {
  background: var(--deep-charcoal);
  padding: var(--spacing-lg);
  border-radius: var(--radius);
  text-align: center;
  box-shadow: inset 0 0 0 2px rgba(255, 107, 53, 0.2), var(--shadow);
  transition: var(--transition-slow);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: inset 0 0 0 2px var(--warm-orange), var(--shadow-hover);
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--warm-orange);
  display: block;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 1.1rem;
  color: var(--metallic-grey);
}

/* ===========================
   CARD COMPONENTS
   =========================== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.card {
  background: var(--dark-asphalt);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition-slow);
  border: 2px solid transparent;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--warm-orange);
}

.card-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  background: var(--deep-charcoal);
}

.card-content {
  padding: var(--spacing-md);
}

.card-title {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-sm);
  color: var(--warm-orange);
}

.card-description {
  color: var(--metallic-grey);
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--warm-orange);
  font-weight: 600;
  transition: var(--transition);
}

.read-more:hover {
  gap: var(--spacing-sm);
  color: var(--warm-orange-light);
}

.read-more svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
}

/* ===========================
   ADVANTAGES SECTION
   =========================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.advantage-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--dark-asphalt);
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 2px rgba(255, 107, 53, 0.2), var(--shadow);
  transition: var(--transition-slow);
}

.advantage-item:hover {
  transform: translateY(-4px);
  box-shadow: inset 0 0 0 2px var(--warm-orange), var(--shadow-hover);
}

.advantage-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--spacing-md);
  stroke: var(--warm-orange);
  stroke-width: 2;
  fill: none;
}

.advantage-title {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-sm);
  color: var(--warm-orange);
}

.advantage-description {
  color: var(--metallic-grey);
  font-size: 0.95rem;
}

/* ===========================
   REVIEWS SECTION
   =========================== */
.reviews-section {
  background: var(--dark-asphalt);
  padding: var(--spacing-xl) 0;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.review-card {
  background: var(--deep-charcoal);
  padding: var(--spacing-lg);
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 2px rgba(255, 107, 53, 0.2), var(--shadow);
  transition: var(--transition-slow);
}

.review-card:hover {
  transform: translateY(-4px);
  box-shadow: inset 0 0 0 2px var(--warm-orange), var(--shadow-hover);
}

.review-text {
  font-style: italic;
  color: var(--metallic-grey);
  margin-bottom: var(--spacing-md);
  font-size: 1.05rem;
  line-height: 1.7;
}

.review-author {
  font-weight: 600;
  color: var(--warm-orange);
  font-size: 0.95rem;
}

/* ===========================
   CATEGORIES SECTION
   =========================== */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.category-card {
  background: linear-gradient(135deg, var(--dark-asphalt) 0%, #1f1f1f 100%);
  padding: var(--spacing-lg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: all var(--transition-slow);
  border: 2px solid transparent;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--warm-orange);
  background: linear-gradient(135deg, #1f1f1f 0%, var(--dark-asphalt) 100%);
}

.category-icon {
  width: 72px;
  height: 72px;
  margin-bottom: var(--spacing-md);
  stroke: var(--warm-orange);
  stroke-width: 2;
  fill: none;
}

.category-title {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-sm);
  color: var(--warm-orange);
}

.category-description {
  color: var(--metallic-grey);
  font-size: 0.95rem;
}

/* ===========================
   NEWSLETTER SECTION
   =========================== */
.newsletter-section {
  background: linear-gradient(135deg, var(--dark-asphalt) 0%, #1f1f1f 100%);
  padding: var(--spacing-xl) 0;
  text-align: center;
  border-top: 2px solid var(--warm-orange);
  border-bottom: 2px solid var(--warm-orange);
}

.newsletter-form {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.newsletter-input {
  flex: 1;
  min-width: 280px;
  padding: 16px 24px;
  border-radius: var(--radius);
  border: 2px solid var(--metallic-silver);
  background: var(--deep-charcoal);
  color: var(--white-text);
  font-size: 1rem;
  transition: var(--transition);
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--warm-orange);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.2);
}

.newsletter-button {
  padding: 16px 40px;
  background: linear-gradient(135deg, var(--warm-orange) 0%, var(--warm-orange-light) 100%);
  color: var(--white-text);
  font-weight: 700;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: all var(--transition-slow);
  border: 2px solid transparent;
}

.newsletter-button:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--white-text);
}

/* ===========================
   FOOTER
   =========================== */
.footer {
  background: var(--deep-charcoal);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  border-top: 2px solid var(--warm-orange);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
  color: var(--warm-orange);
  margin-bottom: var(--spacing-md);
  font-size: 1.2rem;
}

.footer-section p,
.footer-section a {
  color: var(--metallic-grey);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-xs);
  display: block;
  transition: var(--transition);
}

.footer-section a:hover {
  color: var(--warm-orange);
  padding-left: var(--spacing-xs);
}

.footer-bottom {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-md);
  text-align: center;
  border-top: 1px solid rgba(255, 107, 53, 0.2);
  color: var(--metallic-silver);
  font-size: 0.9rem;
}

/* ===========================
   CATEGORY PAGE HEADER
   =========================== */
.category-header {
  background: linear-gradient(135deg, var(--dark-asphalt) 0%, #1f1f1f 50%, var(--deep-charcoal) 100%);
  padding: var(--spacing-xl) 0;
  text-align: center;
  border-bottom: 2px solid var(--warm-orange);
  position: relative;
  overflow: hidden;
}

.category-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(45deg, transparent 30%, rgba(255, 107, 53, 0.05) 40%, transparent 50%);
  background-size: 80px 80px;
  animation: diagonalMove 15s linear infinite;
}

.category-header-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.category-header-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  stroke: var(--warm-orange);
  stroke-width: 2;
  fill: none;
}

.category-header h1 {
  color: var(--warm-orange);
  margin-bottom: var(--spacing-md);
}

.category-header p {
  font-size: 1.15rem;
  color: var(--metallic-grey);
  max-width: 700px;
  margin: 0 auto;
}

/* ===========================
   BACK TO TOP BUTTON
   =========================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--warm-orange) 0%, var(--warm-orange-light) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-slow);
  z-index: 999;
  border: 2px solid transparent;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--white-text);
}

.back-to-top svg {
  width: 24px;
  height: 24px;
  stroke: var(--white-text);
  stroke-width: 3;
}

/* ===========================
   SCROLL REVEAL ANIMATION
   =========================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ===========================
   RESPONSIVE STYLES
   =========================== */
@media screen and (max-width: 1024px) {
  .cards-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

@media screen and (max-width: 768px) {
  .burger {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 400px;
    height: 100vh;
    background: var(--deep-charcoal);
    flex-direction: column;
    align-items: flex-start;
    padding: 80px var(--spacing-lg) var(--spacing-lg);
    gap: var(--spacing-md);
    transition: right 0.3s ease;
    box-shadow: -4px 0 10px rgba(0,0,0,0.5);
    border-left: 2px solid var(--warm-orange);
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-link {
    width: 100%;
    padding: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 107, 53, 0.2);
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .advantages-grid,
  .categories-grid {
    grid-template-columns: 1fr;
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  .newsletter-input {
    min-width: 100%;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media screen and (max-width: 480px) {
  :root {
    --spacing-xl: 32px;
    --spacing-lg: 24px;
  }
  
  .hero {
    min-height: 500px;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .stat-number {
    font-size: 2.5rem;
  }
}