@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Color Palette - Premium Light Theme */
  --bg-color: #f8f9fa;
  --surface-color: #ffffff;
  --text-main: #111827;
  --text-muted: #6b7280;
  --primary-color: #2563eb; /* Sophisticated Blue */
  --primary-hover: #1d4ed8;
  --accent-color: #10b981; /* Emerald Green for shop accents */
  --border-color: #e5e7eb;
  
  /* Typography */
  --font-main: 'Inter', sans-serif;
  
  /* Spacing */
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
  
  /* Utilities */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.2;
}

h1 { font-size: 3rem; margin-bottom: 1rem; letter-spacing: -0.02em; }
h2 { font-size: 2.25rem; margin-bottom: 1rem; letter-spacing: -0.01em; }
h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }
p { color: var(--text-muted); margin-bottom: 1rem; }

/* Layout Containers */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

/* --- Header & Navigation --- */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

/* Top Bar (Socials, Contacts) */
.top-bar {
  background-color: var(--text-main);
  color: var(--surface-color);
  font-size: 0.875rem;
  padding: 0.5rem 0;
}

.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top-bar-links a {
  color: #d1d5db;
  margin-left: 1rem;
}

.top-bar-links a:hover {
  color: var(--surface-color);
}

/* Bottom Bar (Nav) */
.nav-bar {
  padding: 1rem 0;
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-muted);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: var(--transition);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: #fff;
}

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

.btn-outline:hover {
  border-color: var(--text-main);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 6rem 0;
  background: linear-gradient(180deg, var(--surface-color) 0%, var(--bg-color) 100%);
}

.hero h1 {
  max-width: 800px;
  margin: 0 auto 1.5rem;
}

.hero p {
  max-width: 600px;
  margin: 0 auto 2rem;
  font-size: 1.125rem;
}

/* Cards (Projects / Articles) */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.card {
  background: var(--surface-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background-color: #e5e7eb;
}

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

.tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  background-color: #dbeafe;
  color: var(--primary-hover);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  background-color: var(--surface-color);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
  text-align: center;
  color: var(--text-muted);
}

/* Article Template specific */
.article-header {
  text-align: center;
  margin-bottom: 3rem;
}

.article-content {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.125rem;
  color: #374151;
}

.article-content h2 {
  margin-top: 2.5rem;
}

.article-content img {
  width: 100%;
  border-radius: var(--radius-md);
  margin: 2rem 0;
}

/* Sidebar Layout */
.layout-sidebar {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--spacing-xl);
}

.sidebar-widget {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.sidebar-widget h3 {
  font-size: 1.125rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--primary-color);
  display: inline-block;
}

.sidebar-widget ul {
  list-style: none;
}

.sidebar-widget ul li {
  margin-bottom: 0.75rem;
}

.sidebar-widget ul li a:hover {
  color: var(--primary-color);
}

.menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--text-main);
}

/* Mobile Responsive */
@media (max-width: 992px) {
  .layout-sidebar {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2.25rem; }
  .top-bar { display: none; }
  .menu-btn { display: block; }
  .sidebar { display: none; } /* Hide sidebar on mobile */

  /* Mobile side drawer navigation */
  .nav-links {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: -250px;
    width: 250px;
    height: 100vh;
    background-color: var(--surface-color);
    box-shadow: 2px 0 15px rgba(0,0,0,0.1);
    transition: left 0.3s ease;
    padding: 4rem 2rem 2rem;
    z-index: 1000;
    gap: 1.5rem;
  }
  
  .nav-links.open {
    left: 0;
  }
}

.close-btn {
  display: none;
  background: none;
  border: none;
  font-size: 2.5rem;
  cursor: pointer;
  position: absolute;
  top: 0.5rem;
  right: 1rem;
  color: var(--text-main);
  line-height: 1;
}

@media (max-width: 768px) {
  .close-btn { display: block; }
}