@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&display=swap');

:root {
  --bg-color: #0f172a;
  --text-color: #f8fafc;
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --card-bg: rgba(30, 41, 59, 0.7);
  --border-color: rgba(255, 255, 255, 0.1);
  --glass-blur: blur(12px);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: 
    radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.15) 0px, transparent 50%);
  background-attachment: fixed;
}

header {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav .logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(to right, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-decoration: none;
}

nav ul {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  align-items: center;
}

nav a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
  font-size: 0.95rem;
}

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

.btn {
  background-color: var(--primary-color);
  color: white !important;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
}

.btn:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

main {
  flex: 1;
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 2rem;
  width: 100%;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(rgba(15, 23, 42, 0.7), rgba(15, 23, 42, 0.9)), url('https://images.unsplash.com/photo-1550745165-9bc0b252726f?w=1600&q=80') center/cover;
  border-radius: 20px;
  padding: 4rem 3rem;
  margin-bottom: 3rem;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
  border: 1px solid var(--border-color);
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: linear-gradient(to right, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content p {
  font-size: 1.2rem;
  color: #cbd5e1;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-inline: auto;
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

/* Shop Layout */
.shop-container {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 3rem;
}

.sidebar {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  height: fit-content;
}

.sidebar h3 {
  margin-bottom: 1rem;
  font-size: 1.1rem;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.category-list {
  list-style: none;
}

.category-list li {
  margin-bottom: 0.5rem;
}

.category-list a {
  color: #94a3b8;
  text-decoration: none;
  transition: all 0.2s;
  display: block;
  padding: 0.5rem;
  border-radius: 8px;
}

.category-list li.active a, .category-list a:hover {
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary-color);
}

.filter-group label {
  display: block;
  margin-bottom: 0.8rem;
  color: #94a3b8;
  cursor: pointer;
}

.filter-group input {
  margin-right: 0.5rem;
  accent-color: var(--primary-color);
}

/* Products Section */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.section-header h2 {
  font-size: 1.8rem;
}

.sort-by select {
  background: var(--card-bg);
  color: white;
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  outline: none;
}

/* Products Grid */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.product-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: all 0.4s ease;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-5px);
  border-color: rgba(96, 165, 250, 0.4);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.product-image-wrapper {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.product-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-image {
  transform: scale(1.05);
}

.badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: #f59e0b;
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.product-info {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-category {
  font-size: 0.75rem;
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.product-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #fff;
}

.product-description {
  font-size: 0.85rem;
  color: #94a3b8;
  margin-bottom: 1.5rem;
  line-height: 1.4;
}

.product-bottom {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.product-price {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
}

.btn-icon {
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

/* Authentication */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 60vh;
}

.auth-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 3rem;
  width: 100%;
  max-width: 450px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
  backdrop-filter: var(--glass-blur);
}

.auth-card h2 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  text-align: center;
}

.auth-subtitle {
  color: #94a3b8;
  text-align: center;
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  color: #cbd5e1;
}

.form-group input {
  width: 100%;
  padding: 0.8rem 1rem;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: white;
  font-family: inherit;
  outline: none;
  transition: all 0.3s;
}

.form-group input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
}

.form-options a {
  color: var(--primary-color);
  text-decoration: none;
}

.btn-full {
  width: 100%;
  padding: 0.8rem;
  font-size: 1rem;
}

.auth-footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.9rem;
  color: #94a3b8;
}

.auth-footer a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
}

.footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border-color);
  margin-top: 4rem;
  color: #94a3b8;
  font-size: 0.9rem;
}