/* ============================================
   KELVIN POWER - Premium Catalog Styles
   ============================================ */

/* CSS Variables */
:root {
  --primary-red: #dc2626;
  --primary-blue: #1e40af;
  --dark-bg: #0a0a0a;
  --darker-bg: #050505;
  --card-bg: #111111;
  --card-border: #222222;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --gradient-red: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
  --gradient-blue: linear-gradient(135deg, #1e40af 0%, #1e3a8a 100%);
  --gradient-mixed: linear-gradient(135deg, #dc2626 0%, #1e40af 100%);
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --shadow-glow: 0 0 60px rgba(220, 38, 38, 0.15);
  --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: "Inter", "Segoe UI", sans-serif;
  background: var(--dark-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

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

p {
  color: var(--text-secondary);
}

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

/* Container */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 1rem 0;
  transition: var(--transition-smooth);
}

.navbar.scrolled {
  background: rgba(5, 5, 5, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.logo img {
  height: 50px;
  width: auto;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-mixed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}

.nav-links a::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-mixed);
  transition: var(--transition-smooth);
  transform: translateX(-50%);
}

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

.nav-links a:hover::before {
  width: 80%;
}

.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a.active::before {
  width: 80%;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: radial-gradient(
      ellipse at center,
      rgba(30, 64, 175, 0.1) 0%,
      transparent 70%
    ),
    radial-gradient(
      ellipse at top right,
      rgba(220, 38, 38, 0.1) 0%,
      transparent 50%
    ),
    var(--darker-bg);
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.03)"/></svg>');
  background-size: 50px 50px;
  animation: float 30s linear infinite;
}

@keyframes float {
  0% {
    transform: translate(0, 0) rotate(0deg);
  }
  100% {
    transform: translate(-50px, -50px) rotate(360deg);
  }
}

.hero-content {
  text-align: center;
  z-index: 10;
  padding: 2rem;
}

.hero-logo {
  width: 200px;
  height: auto;
  margin-bottom: 2rem;
  animation: fadeInUp 1s ease-out;
}

.hero h1 {
  margin-bottom: 1.5rem;
  animation: fadeInUp 1s ease-out 0.2s both;
}

.hero h1 span {
  background: var(--gradient-mixed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease-out 0.6s both;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-red);
  color: white;
  box-shadow: 0 4px 20px rgba(220, 38, 38, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(220, 38, 38, 0.5);
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid var(--glass-border);
}

.btn-secondary:hover {
  background: var(--glass-bg);
  border-color: var(--primary-red);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

.scroll-indicator span {
  display: block;
  width: 30px;
  height: 50px;
  border: 2px solid var(--glass-border);
  border-radius: 20px;
  position: relative;
}

.scroll-indicator span::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  width: 6px;
  height: 10px;
  background: var(--primary-red);
  border-radius: 3px;
  transform: translateX(-50%);
  animation: scroll 2s infinite;
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

@keyframes scroll {
  0% {
    opacity: 1;
    top: 8px;
  }
  100% {
    opacity: 0;
    top: 30px;
  }
}

/* Sections */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary-red);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.section-title {
  margin-bottom: 1rem;
}

.section-desc {
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.125rem;
}

/* Product Cards Grid */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

/* Product Card */
.product-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  overflow: hidden;
  transition: var(--transition-smooth);
  position: relative;
}

.product-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-mixed);
  transform: scaleX(0);
  transition: var(--transition-smooth);
}

.product-card:hover {
  transform: translateY(-10px);
  border-color: rgba(220, 38, 38, 0.3);
  box-shadow: var(--shadow-glow);
}

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

.product-image {
  width: 100%;
  height: 250px;
  background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-image img {
  max-width: 80%;
  max-height: 80%;
  object-fit: contain;
  transition: var(--transition-smooth);
}

.product-card:hover .product-image img {
  transform: scale(1.1);
}

.product-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.5rem 1rem;
  background: var(--gradient-red);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.product-content {
  padding: 1.5rem;
}

.product-category {
  font-size: 0.875rem;
  color: var(--primary-blue);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.product-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.product-desc {
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.product-specs {
  display: flex;
  gap: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--card-border);
}

.spec-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.spec-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.spec-value {
  font-weight: 600;
  color: var(--text-primary);
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-card {
  padding: 2rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  text-align: center;
  transition: var(--transition-smooth);
}

.feature-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(220, 38, 38, 0.3);
  transform: translateY(-5px);
}

.feature-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 1.5rem;
  background: var(--gradient-mixed);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.feature-desc {
  font-size: 0.9rem;
}

/* Specifications Table */
.specs-table-container {
  overflow-x: auto;
  border-radius: 16px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.specs-table thead {
  background: var(--gradient-mixed);
}

.specs-table th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

.specs-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--card-border);
  white-space: nowrap;
}

.specs-table tbody tr {
  transition: var(--transition-smooth);
}

.specs-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.specs-table tbody tr:last-child td {
  border-bottom: none;
}

/* Contact Section */
.contact-section {
  background: linear-gradient(
    135deg,
    rgba(220, 38, 38, 0.05) 0%,
    rgba(30, 64, 175, 0.05) 100%
  );
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 3rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: var(--gradient-mixed);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-text h4 {
  margin-bottom: 0.25rem;
}

.contact-text p {
  font-size: 0.9rem;
}

/* Footer */
.footer {
  background: var(--darker-bg);
  padding: 3rem 0;
  border-top: 1px solid var(--card-border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-logo {
  height: 40px;
}

.footer-text {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition-smooth);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

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

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .products-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 4rem 0;
  }

  .container {
    padding: 0 1rem;
  }
}

/* Page Transition */
.page-transition {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--dark-bg);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
}

.page-transition.active {
  opacity: 1;
  pointer-events: all;
}

/* Print Styles */
@media print {
  .navbar,
  .scroll-indicator,
  .hero-buttons {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 2rem 0;
  }

  .product-card {
    break-inside: avoid;
  }
}