/* ===================================
   2TL Inc. Website Stylesheet
   Modern Design System with Premium Aesthetics
   =================================== */

/* === CSS Variables / Design Tokens === */
:root {
  /* Color Palette - Professional & Trust-Building */
  --primary-color: #0ea5e9;
  --primary-dark: #0284c7;
  --primary-light: #38bdf8;
  --secondary-color: #14b8a6;
  --secondary-dark: #0d9488;

  --accent-color: #f59e0b;
  --accent-light: #fbbf24;

  /* Neutral Colors - Dark Theme */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: rgba(30, 41, 59, 0.6);
  --bg-card-hover: rgba(30, 41, 59, 0.8);

  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  --border-color: rgba(148, 163, 184, 0.2);
  --border-light: rgba(148, 163, 184, 0.1);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #14b8a6 100%);
  --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  --gradient-hero: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(20, 184, 166, 0.1) 100%);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Inter', sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  /* Effects */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(14, 165, 233, 0.3);

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

/* === Base Styles === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1 {
  font-size: var(--text-5xl);
}

h2 {
  font-size: var(--text-4xl);
}

h3 {
  font-size: var(--text-3xl);
}

h4 {
  font-size: var(--text-2xl);
}

h5 {
  font-size: var(--text-xl);
}

h6 {
  font-size: var(--text-lg);
}

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

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

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

/* === Layout === */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-3xl) 0;
}

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

/* === Header & Navigation === */
.header {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-lg);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

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

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

.nav-logo-text {
  font-size: var(--text-2xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-light);
  background: rgba(14, 165, 233, 0.1);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: var(--text-2xl);
  cursor: pointer;
  padding: var(--spacing-xs);
}

/* === Hero Section === */
.hero {
  background: var(--gradient-hero);
  padding: var(--spacing-3xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.1) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: gridMove 20s linear infinite;
  opacity: 0.3;
}

@keyframes gridMove {
  0% {
    transform: translate(0, 0);
  }

  100% {
    transform: translate(50px, 50px);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.hero h1 {
  font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.8s ease;
}

.hero .tagline {
  font-size: var(--text-xl);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero .cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.4s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === Buttons === */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-lg);
  cursor: pointer;
  border: none;
  font-size: var(--text-base);
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: white;
}

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

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

.btn-outline {
  background: transparent;
  color: var(--primary-light);
  border: 2px solid var(--primary-light);
}

.btn-outline:hover {
  background: var(--primary-light);
  color: var(--bg-primary);
}

/* === Cards === */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-xl);
  transform: translateY(-5px);
}

.card-title {
  font-size: var(--text-2xl);
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.card-text {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* === Grid System === */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* === Product Showcase === */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.product-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  background: var(--bg-tertiary);
}

.product-info {
  padding: var(--spacing-md);
}

.product-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.product-description {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--spacing-sm);
}

.product-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(14, 165, 233, 0.2);
  color: var(--primary-light);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  margin-top: var(--spacing-xs);
}

/* === Availability Badges === */
.availability-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  margin-top: var(--spacing-xs);
  margin-right: var(--spacing-xs);
}

.availability-in-stock {
  background: rgba(34, 197, 94, 0.2);
  color: #22c55e;
  border: 1px solid #22c55e;
}

.availability-low-stock {
  background: rgba(245, 158, 11, 0.2);
  color: #f59e0b;
  border: 1px solid #f59e0b;
}

.availability-out-of-stock {
  background: rgba(239, 68, 68, 0.2);
  color: #ef4444;
  border: 1px solid #ef4444;
}

.availability-coming-soon {
  background: rgba(59, 130, 246, 0.2);
  color: #3b82f6;
  border: 1px solid #3b82f6;
}

.product-sku {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-bottom: var(--spacing-xs);
}

.product-price {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--primary-light);
  margin-top: var(--spacing-xs);
}


/* === Features Section === */
.features {
  background: var(--bg-secondary);
}

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

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-4xl);
}

/* === Forms === */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
  font-weight: 500;
}

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

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-error {
  color: #ef4444;
  font-size: var(--text-sm);
  margin-top: var(--spacing-xs);
}

/* === Footer === */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-3xl);
}

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

.footer-section h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

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

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

.footer-links a {
  color: var(--text-muted);
  transition: color var(--transition-base);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-light);
  color: var(--text-muted);
  font-size: var(--text-sm);
}

/* === Utilities === */
.text-center {
  text-align: center;
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.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);
}

.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);
}

/* === Responsive Design === */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
    transition: left var(--transition-slow);
    border-top: 1px solid var(--border-light);
  }

  .nav-links.active {
    left: 0;
  }

  .nav-toggle {
    display: block;
  }

  .hero h1 {
    font-size: var(--text-4xl);
  }

  .hero .cta-buttons {
    flex-direction: column;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-3xl: 3rem;
    --spacing-2xl: 2rem;
  }

  .hero h1 {
    font-size: var(--text-3xl);
  }

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

/* === Animations === */
.fade-in {
  animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.slide-in-left {
  animation: slideInLeft 0.6s ease;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-in-right {
  animation: slideInRight 0.6s ease;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* === Image Carousel === */
.carousel-container {
  position: relative;
  max-width: 1400px;
  margin: var(--spacing-xl) auto;
  overflow: hidden;
}

.carousel {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  gap: var(--spacing-lg);
  padding: var(--spacing-md) 0;
}

.carousel-item {
  flex: 0 0 calc(33.333% - var(--spacing-lg));
  min-width: calc(33.333% - var(--spacing-lg));
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
}

.carousel-item:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.carousel-item-image {
  width: 100%;
  height: 350px;
  object-fit: contain;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  padding: var(--spacing-lg);
  transition: transform var(--transition-base);
}

.carousel-item:hover .carousel-item-image {
  transform: scale(1.05);
}

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

.carousel-item-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.carousel-item-description {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--spacing-sm);
}

.carousel-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: var(--text-2xl);
  transition: all var(--transition-base);
  z-index: 10;
  user-select: none;
}

.carousel-nav:hover {
  background: var(--primary-color);
  color: white;
  box-shadow: var(--shadow-glow);
  transform: translateY(-50%) scale(1.1);
}

.carousel-nav-prev {
  left: -25px;
}

.carousel-nav-next {
  right: -25px;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.carousel-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--border-color);
  cursor: pointer;
  transition: all var(--transition-base);
}

.carousel-dot.active {
  background: var(--primary-color);
  transform: scale(1.3);
}

.carousel-dot:hover {
  background: var(--primary-light);
}

/* === Lightbox for Image Viewing === */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease;
}

.lightbox.active {
  display: flex;
}

.lightbox-content {
  position: relative;
  max-width: 90%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-image {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

.lightbox-caption {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  text-align: center;
}

.lightbox-caption h3 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.lightbox-caption p {
  color: var(--text-secondary);
  margin: 0;
}

.lightbox-close {
  position: absolute;
  top: -50px;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: var(--text-2xl);
  transition: all var(--transition-base);
}

.lightbox-close:hover {
  background: #ef4444;
  border-color: #ef4444;
  color: white;
  transform: rotate(90deg) scale(1.1);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: var(--text-2xl);
  transition: all var(--transition-base);
}

.lightbox-nav:hover {
  background: var(--primary-color);
  color: white;
  box-shadow: var(--shadow-glow);
}

.lightbox-nav-prev {
  left: -80px;
}

.lightbox-nav-next {
  right: -80px;
}

/* === Responsive Carousel === */
@media (max-width: 1024px) {
  .carousel-item {
    flex: 0 0 calc(50% - var(--spacing-lg));
    min-width: calc(50% - var(--spacing-lg));
  }

  .carousel-nav-prev {
    left: 10px;
  }

  .carousel-nav-next {
    right: 10px;
  }
}

@media (max-width: 768px) {
  .carousel-item {
    flex: 0 0 calc(100% - var(--spacing-lg));
    min-width: calc(100% - var(--spacing-lg));
  }

  .carousel-item-image {
    height: 300px;
  }

  .lightbox-nav-prev {
    left: 10px;
  }

  .lightbox-nav-next {
    right: 10px;
  }
}

@media (max-width: 480px) {
  .carousel-item-image {
    height: 250px;
  }

  .carousel-nav {
    width: 40px;
    height: 40px;
    font-size: var(--text-lg);
  }
}