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

:root {
  --bg: #0a0a0b;
  --bg-elevated: #141416;
  --bg-card: #1a1a1f;
  --text: #e4e4e7;
  --text-muted: #a1a1aa;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --border: #27272a;
  --radius: 12px;
  --container: 1100px;
  --container-narrow: 740px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* === Buttons === */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  font-family: inherit;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.875rem;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
}

.btn-outline {
  border: 1px solid var(--border);
  color: var(--text);
  background: transparent;
}

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

/* === Header === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 11, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--accent);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

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

.nav-links .btn {
  color: #fff;
  background: var(--accent);
}

.nav-links .btn:hover {
  background: var(--accent-hover);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: all 0.3s;
}

/* === Hero === */
.hero {
  padding: 160px 0 100px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* === Services === */
.services {
  padding: 80px 0;
}

.services h2 {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color 0.2s, transform 0.2s;
}

.service-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.service-icon {
  color: var(--accent);
  margin-bottom: 16px;
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* === Contact === */
.contact {
  padding: 80px 0 100px;
}

.contact h2 {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.contact-sub {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 48px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #52525b;
}

.contact-form .btn {
  width: 100%;
  padding: 14px;
  font-size: 1rem;
}

/* === Blog List === */
.blog-list {
  padding: 120px 0 80px;
}

.blog-list h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.blog-intro {
  color: var(--text-muted);
  margin-bottom: 48px;
  font-size: 1.1rem;
}

.posts {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  transition: border-color 0.2s;
}

.post-card:hover {
  border-color: var(--accent);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.post-meta time {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.tag {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent);
}

.post-card h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.post-card h2 a {
  color: var(--text);
}

.post-card h2 a:hover {
  color: var(--accent);
}

.post-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.read-more {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.9rem;
  font-weight: 500;
}

/* === Blog Post === */
.blog-post {
  padding: 120px 0 80px;
}

.post-header {
  margin-bottom: 40px;
}

.post-header time {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.post-header h1 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-top: 8px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.post-tags {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.post-content {
  font-size: 1.05rem;
  line-height: 1.8;
}

.post-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 48px 0 16px;
  letter-spacing: -0.01em;
}

.post-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 32px 0 12px;
}

.post-content p {
  margin-bottom: 20px;
  color: var(--text-muted);
}

.post-content ul,
.post-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
  color: var(--text-muted);
}

.post-content li {
  margin-bottom: 8px;
}

.post-content code {
  background: var(--bg-card);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.9em;
}

.post-content pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 24px;
}

.post-content pre code {
  background: none;
  padding: 0;
}

.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 20px;
  margin: 24px 0;
  color: var(--text-muted);
  font-style: italic;
}

.post-content a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.post-footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.back-link {
  font-weight: 500;
  font-size: 0.95rem;
}

/* === Footer === */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  text-align: center;
}

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

/* === Pagination === */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
  list-style: none;
}

.page-item a,
.page-item span {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.9rem;
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.page-item.active span {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* === Responsive === */
@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
  }

  .nav-links.active {
    display: flex;
  }

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 120px 0 60px;
  }
}