* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: #f8f9ff;
  color: #111827;
  overflow-x: hidden;
}

/* ========== SKIP LINK ========== */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #4f46ff;
  color: white;
  padding: 8px 16px;
  z-index: 1001;
  text-decoration: none;
  border-radius: 0 0 8px 0;
  font-weight: 500;
}
.skip-link:focus { top: 0; outline: none; }

/* ========== NAVBAR STYLES ========== */
.navbar {
  height: 90px;
  background: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 50px;
  border-bottom: 1px solid #ececf8;
  position: sticky;
  top: 0;
  z-index: 1000;
}
.logo { display: flex; align-items: center; gap: 14px; z-index: 1002; }
.logo-icon { width: 44px; height: 44px; border-radius: 12px; background: linear-gradient(135deg, #6b5cff, #4338ff); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 24px; flex-shrink: 0; }
.logo h2 { font-size: 24px; background: linear-gradient(135deg, #6b5cff, #4338ff); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; white-space: nowrap; }
.nav-menu { list-style: none; display: flex; gap: 20px; margin: 0; padding: 0; align-items: center; }
.nav-menu li a { text-decoration: none; color: #333; padding: 10px 18px; display: block; transition: all 0.3s ease; border-radius: 8px; font-weight: 600; font-size: 15px; }
.nav-menu li a:hover { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; transform: translateY(-2px); box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4); }
.nav-menu li.active a { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; }

/* CSS Only Hamburger */
.nav-toggle {
  display: none;
}

.hamburger {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid #ececf8;
  background: #ffffff;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  z-index: 1002;
  box-shadow: 0 8px 20px rgba(79, 70, 255, 0.08);
}

.hamburger span {
  width: 22px;
  height: 2px;
  background: #4f46ff;
  border-radius: 20px;
  transition: all 0.3s ease;
}

/* Focus styles */
.nav-menu li a:focus-visible, .sidebar a:focus-visible, .cta-button:focus-visible,
.comment-form button:focus-visible, .social-links a:focus-visible, .reply-btn:focus-visible,
.share-btn:focus-visible, .back-to-top:focus-visible, .hamburger:focus-visible { outline: 2px solid #4f46ff; outline-offset: 2px; border-radius: 4px; }

/* ========== POST HEADER ========== */
.post-header { max-width: 900px; margin: 60px auto 40px; padding: 0 20px; text-align: center; }
.post-category { margin-bottom: 20px; }
.tag { display: inline-block; padding: 6px 14px; border-radius: 30px; font-size: 12px; font-weight: 700; letter-spacing: 0.5px; }
.tag.tutorial { background: #dbeafe; color: #1e40af; }
.post-header h1 { font-size: 48px; line-height: 1.2; margin-bottom: 20px; color: #081028; }
.post-meta { display: flex; justify-content: center; gap: 25px; margin-bottom: 30px; color: #64748b; font-size: 14px; }
.post-meta span { display: inline-flex; align-items: center; gap: 6px; }
.post-feature-image { border-radius: 20px; overflow: hidden; box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1); }
.post-feature-image img { width: 100%; height: auto; display: block; }

/* ========== POST CONTAINER ========== */
.post-container { max-width: 1200px; margin: 50px auto; padding: 0 20px; display: grid; grid-template-columns: 1fr 320px; gap: 50px; }
.post-content { background: linear-gradient(135deg, #ffffff 0%, #fafbff 100%); border-radius: 24px; padding: 45px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05); }
.post-intro p { font-size: 18px; line-height: 1.8; color: #475569; margin-bottom: 20px; }

/* ========== TABLE OF CONTENTS ========== */
.table-of-contents { background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%); padding: 28px; border-radius: 20px; margin: 30px 0; border-left: 4px solid #4f46ff; }
.table-of-contents h3 { margin-bottom: 18px; font-size: 18px; color: #081028; }
.table-of-contents ul { list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.table-of-contents li a { text-decoration: none; color: #4f46ff; font-size: 14px; transition: all 0.3s ease; display: inline-block; position: relative; }
.table-of-contents li a:hover { transform: translateX(5px); }
.table-of-contents li a::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: #4f46ff; transition: width 0.3s ease; }
.table-of-contents li a:hover::after { width: 100%; }
.table-of-contents li a.active { color: #4f46ff; font-weight: 600; background: #ede9ff; padding: 5px 10px; border-radius: 8px; margin: -5px -10px; }

/* ========== POST SECTIONS ========== */
.post-section { margin: 45px 0; animation: fadeIn 0.3s ease forwards; }
.post-section h2 { font-size: 32px; margin-bottom: 20px; color: #081028; border-left: 4px solid #4f46ff; padding-left: 15px; }
.post-section p { font-size: 16px; line-height: 1.8; color: #475569; margin-bottom: 16px; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Reasons Grid */
.reasons-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 15px;
  margin: 25px 0;
}
.reason-card {
  background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
  padding: 15px;
  border-radius: 12px;
  text-align: center;
  border: 1px solid #eef2ff;
  transition: all 0.3s ease;
}
.reason-card:hover { transform: translateY(-3px); box-shadow: 0 5px 15px rgba(79, 70, 255, 0.1); }
.reason-card i { font-size: 24px; color: #4f46ff; margin-bottom: 8px; }
.reason-card h4 { font-size: 12px; }

/* Requirements Grid */
.requirements-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin: 25px 0;
}
.req-card {
  background: linear-gradient(135deg, #ffffff 0%, #fafbff 100%);
  padding: 20px;
  border-radius: 16px;
  text-align: center;
  border: 1px solid #eef2ff;
  transition: all 0.3s ease;
}
.req-card:hover { transform: translateY(-3px); box-shadow: 0 5px 15px rgba(79, 70, 255, 0.1); }
.req-card i { font-size: 32px; color: #4f46ff; margin-bottom: 12px; }
.req-card h4 { font-size: 16px; margin-bottom: 8px; }
.req-card p { font-size: 13px; margin-bottom: 0; }

/* Info Note */
.info-note {
  background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
  padding: 15px 20px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
}
.info-note i { font-size: 20px; color: #15803d; }
.info-note p { margin-bottom: 0; font-size: 14px; }

/* Advantages Grid */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 25px 0;
}
.advantage-card {
  text-align: center;
  padding: 20px;
  background: linear-gradient(135deg, #ffffff 0%, #fafbff 100%);
  border-radius: 16px;
  border: 1px solid #eef2ff;
  transition: all 0.3s ease;
}
.advantage-card:hover { transform: translateY(-3px); box-shadow: 0 5px 15px rgba(79, 70, 255, 0.1); }
.advantage-card i { font-size: 32px; color: #4f46ff; margin-bottom: 12px; }
.advantage-card h4 { font-size: 16px; margin-bottom: 8px; }
.advantage-card p { font-size: 13px; margin-bottom: 0; }

/* Problems Grid */
.problems-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin: 25px 0;
}
.problem-card {
  background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
  padding: 20px;
  border-radius: 16px;
  text-align: center;
  transition: all 0.3s ease;
}
.problem-card:hover { transform: translateY(-3px); }
.problem-card i { font-size: 28px; color: #dc2626; margin-bottom: 12px; }
.problem-card h4 { font-size: 15px; margin-bottom: 8px; }
.problem-card p { font-size: 13px; margin-bottom: 0; }

/* Steps Container */
.steps-container {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin: 25px 0;
}
.step {
  text-align: center;
  padding: 20px 15px;
  background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
  border-radius: 16px;
  border: 1px solid #eef2ff;
  transition: all 0.3s ease;
}
.step:hover { transform: translateY(-5px); box-shadow: 0 10px 25px rgba(79, 70, 255, 0.1); }
.step-num {
  width: 45px;
  height: 45px;
  background: linear-gradient(135deg, #6b5cff, #4338ff);
  color: white;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  margin: 0 auto 12px;
}
.step h4 { font-size: 14px; margin-bottom: 8px; }
.step p { font-size: 12px; margin-bottom: 0; }
.info-note { text-align: center; color: #4f46ff; font-weight: 500; margin-top: 15px; }

/* Guide Steps */
.guide-steps {
  margin: 25px 0;
}
.guide-step {
  display: flex;
  gap: 20px;
  padding: 20px;
  background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
  border-radius: 16px;
  margin-bottom: 12px;
  border: 1px solid #eef2ff;
  transition: all 0.3s ease;
}
.guide-step:hover { transform: translateX(8px); background: linear-gradient(135deg, #f0f2ff 0%, #ffffff 100%); }
.guide-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #6b5cff, #4338ff);
  color: white;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 18px;
  flex-shrink: 0;
}
.guide-step h4 { font-size: 16px; margin-bottom: 6px; }
.guide-step p { font-size: 14px; margin-bottom: 0; }

/* Tips Grid */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin: 25px 0;
}
.tip-card {
  background: linear-gradient(135deg, #ffffff 0%, #fafbff 100%);
  padding: 20px;
  border-radius: 16px;
  text-align: center;
  border: 1px solid #eef2ff;
  transition: all 0.3s ease;
}
.tip-card:hover { transform: translateY(-3px); box-shadow: 0 5px 15px rgba(79, 70, 255, 0.1); }
.tip-card i { font-size: 28px; color: #4f46ff; margin-bottom: 12px; }
.tip-card h4 { font-size: 15px; margin-bottom: 8px; }
.tip-card p { font-size: 13px; margin-bottom: 0; }

/* Rejection Grid */
.rejection-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin: 25px 0;
}
.rejection-card {
  background: linear-gradient(135deg, #fef3c7 0%, #fffbeb 100%);
  padding: 20px;
  border-radius: 16px;
  text-align: center;
  transition: all 0.3s ease;
}
.rejection-card:hover { transform: translateY(-3px); }
.rejection-card i { font-size: 28px; color: #f59e0b; margin-bottom: 12px; }
.rejection-card h4 { font-size: 15px; margin-bottom: 8px; }
.rejection-card p { font-size: 12px; margin-bottom: 0; }

/* Benefits List */
.benefits-list {
  margin: 25px 0;
}
.benefit-row {
  display: flex;
  gap: 18px;
  padding: 18px;
  background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
  border-radius: 16px;
  margin-bottom: 12px;
  border: 1px solid #eef2ff;
  transition: all 0.3s ease;
}
.benefit-row:hover { transform: translateX(5px); }
.benefit-row i { font-size: 28px; color: #4f46ff; }
.benefit-row h4 { font-size: 16px; margin-bottom: 4px; }
.benefit-row p { font-size: 14px; margin-bottom: 0; }

/* Future Grid */
.future-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 15px;
  margin: 25px 0;
}
.future-item {
  background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
  padding: 15px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  border: 1px solid #eef2ff;
  transition: all 0.3s ease;
}
.future-item:hover { transform: translateX(3px); }
.future-item i { color: #4f46ff; width: 24px; }

/* Highlight Box */
.highlight-box {
  background: linear-gradient(135deg, #fef3c7 0%, #fffbeb 100%);
  padding: 20px 25px;
  border-radius: 16px;
  margin: 20px 0;
  border-left: 4px solid #f59e0b;
  transition: all 0.3s ease;
}
.highlight-box:hover { transform: translateX(3px); }
.highlight-box i { font-size: 20px; color: #f59e0b; margin-right: 10px; }

/* CTA Box */
.cta-box {
  background: linear-gradient(135deg, #f8f9ff 0%, #ede9ff 100%);
  padding: 35px;
  border-radius: 24px;
  text-align: center;
  margin: 30px 0;
  transition: all 0.3s ease;
}
.cta-box:hover { transform: translateY(-3px); box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05); }
.cta-box .highlight { background: rgba(255, 255, 255, 0.8); padding: 12px; border-radius: 12px; margin: 15px 0; font-weight: 600; }
.cta-button { display: inline-block; margin-top: 20px; padding: 14px 32px; background: linear-gradient(135deg, #6b5cff, #4338ff); color: white; text-decoration: none; border-radius: 14px; font-weight: 600; transition: all 0.3s ease; }
.cta-button:hover { transform: translateY(-3px); box-shadow: 0 10px 25px rgba(107, 92, 255, 0.3); }

/* Share Buttons */
.share-buttons {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: center;
  margin: 30px 0 20px;
  padding: 15px;
  background: linear-gradient(135deg, #f8f9ff, #ffffff);
  border-radius: 60px;
  border: 1px solid #eef2ff;
}
.share-label { font-size: 14px; color: #64748b; }
.share-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  text-decoration: none;
}
.share-btn.facebook { background: #1877f2; color: white; }
.share-btn.twitter { background: #1da1f2; color: white; }
.share-btn.linkedin { background: #0077b5; color: white; }
.share-btn.copy { background: #4f46ff; color: white; }
.share-btn:hover { transform: translateY(-3px); box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2); }

/* Author Bio */
.author-bio {
  display: flex;
  gap: 25px;
  padding: 28px;
  background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%);
  border-radius: 20px;
  margin: 45px 0;
  transition: all 0.3s ease;
}
.author-bio:hover { transform: translateY(-3px); box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05); }
.author-bio img { width: 85px; height: 85px; border-radius: 50%; object-fit: cover; }
.author-bio h4 { font-size: 18px; margin-bottom: 8px; }
.author-bio p { font-size: 14px; color: #475569; margin-bottom: 12px; line-height: 1.6; }
.author-social a { color: #4f46ff; margin-right: 15px; font-size: 18px; transition: all 0.3s ease; display: inline-block; }
.author-social a:hover { transform: translateY(-2px); }

/* Comments Section */
.comments-section {
  margin-top: 45px;
  padding-top: 30px;
  border-top: 1px solid #e2e8f0;
}
.comments-section h3 { margin-bottom: 25px; font-size: 22px; }
.comment {
  display: flex;
  gap: 18px;
  margin-bottom: 25px;
  padding-bottom: 25px;
  border-bottom: 1px solid #e2e8f0;
  transition: all 0.3s ease;
}
.comment:hover { transform: translateX(5px); }
.comment img { width: 50px; height: 50px; border-radius: 50%; object-fit: cover; }
.comment h4 { font-size: 16px; margin-bottom: 5px; }
.comment span { font-size: 12px; color: #64748b; }
.comment p { margin: 10px 0; font-size: 14px; line-height: 1.6; }
.reply-btn {
  background: none;
  border: none;
  color: #4f46ff;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.reply-btn:hover { transform: translateX(5px); color: #4338ff; }
.comment-form {
  margin-top: 30px;
}
.comment-form h4 { margin-bottom: 15px; font-size: 18px; }
.comment-form textarea {
  width: 100%;
  padding: 15px;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  resize: vertical;
  font-family: inherit;
  margin-bottom: 15px;
  background: #fafbff;
  transition: all 0.3s ease;
}
.comment-form textarea:focus { outline: none; border-color: #4f46ff; box-shadow: 0 0 0 3px rgba(79, 70, 255, 0.1); }
.comment-form button {
  padding: 12px 30px;
  background: linear-gradient(135deg, #6b5cff, #4338ff);
  color: white;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
}
.comment-form button:hover { transform: translateY(-2px); box-shadow: 0 5px 15px rgba(107, 92, 255, 0.3); }

/* ========== SIDEBAR ========== */
.post-sidebar {
  position: sticky;
  top: 100px;
  height: fit-content;
}
.sidebar-widget {
  background: white;
  border-radius: 20px;
  padding: 25px;
  margin-bottom: 25px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
  border: 1px solid #eef2ff;
  transition: all 0.3s ease;
}
.sidebar-widget:hover { transform: translateY(-3px); box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08); }
.sidebar-widget h3 { margin-bottom: 20px; font-size: 18px; color: #081028; }
.search-box { position: relative; }
.search-box i {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: #94a3b8;
}
.search-box input {
  width: 100%;
  padding: 12px 15px 12px 42px;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  outline: none;
  background: #fafbff;
  transition: all 0.3s ease;
}
.search-box input:focus { border-color: #4f46ff; box-shadow: 0 0 0 3px rgba(79, 70, 255, 0.1); }
.popular-post {
  display: flex;
  gap: 12px;
  margin-bottom: 15px;
  padding-bottom: 15px;
  border-bottom: 1px solid #e2e8f0;
  transition: all 0.3s ease;
}
.popular-post:hover { transform: translateX(5px); }
.popular-post:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.popular-post img { width: 70px; height: 70px; border-radius: 12px; object-fit: cover; }
.popular-post h4 { font-size: 14px; margin-bottom: 5px; line-height: 1.4; }
.popular-post span { font-size: 12px; color: #64748b; }
.categories { list-style: none; }
.categories li { padding: 10px 0; border-bottom: 1px solid #e2e8f0; }
.categories li:last-child { border-bottom: none; }
.categories a {
  text-decoration: none;
  color: #475569;
  display: flex;
  justify-content: space-between;
  transition: all 0.3s ease;
}
.categories a:hover { color: #4f46ff; transform: translateX(3px); }
.newsletter-widget input {
  width: 100%;
  padding: 12px;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  margin-bottom: 12px;
  background: #fafbff;
  transition: all 0.3s ease;
}
.newsletter-widget input:focus { outline: none; border-color: #4f46ff; box-shadow: 0 0 0 3px rgba(79, 70, 255, 0.1); }
.newsletter-widget button {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, #6b5cff, #4338ff);
  color: white;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
}
.newsletter-widget button:hover { transform: translateY(-2px); box-shadow: 0 5px 15px rgba(107, 92, 255, 0.3); }

/* ========== RELATED POSTS ========== */
.related-posts {
  max-width: 1200px;
  margin: 50px auto;
  padding: 0 20px;
}
.related-posts h2 { font-size: 28px; margin-bottom: 30px; color: #081028; }
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}
.related-card {
  background: white;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}
.related-card:hover { transform: translateY(-5px); box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1); }
.related-card img { width: 100%; height: 200px; object-fit: cover; }
.related-card h4 { padding: 18px 18px 8px; font-size: 16px; line-height: 1.4; }
.related-card a {
  display: inline-block;
  margin: 0 18px 18px;
  text-decoration: none;
  color: #4f46ff;
  font-weight: 600;
  transition: all 0.3s ease;
}
.related-card a:hover { transform: translateX(5px); }

/* ========== FOOTER ========== */
.footer {
  background: #1a1a2e;
  color: #cbd5e1;
  margin-top: 80px;
  padding: 50px 5% 30px;
}
.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 15px; }
.footer-logo i { font-size: 28px; color: #4f46ff; }
.footer-logo h3 { color: white; font-size: 22px; margin: 0; }
.footer-section p { font-size: 14px; line-height: 1.6; margin-bottom: 20px; }
.footer-section h3 { color: white; font-size: 18px; margin-bottom: 20px; }
.footer-section ul { list-style: none; }
.footer-section li { margin-bottom: 10px; }
.footer-section a { color: #cbd5e1; text-decoration: none; transition: all 0.3s ease; }
.footer-section a:hover { color: #4f46ff; padding-left: 5px; }
.social-links { display: flex; gap: 15px; margin-top: 20px; }
.social-links a { color: #cbd5e1; font-size: 20px; transition: all 0.3s ease; }
.social-links a:hover { color: #4f46ff; transform: translateY(-3px); }
.footer-bottom {
  text-align: center;
  padding-top: 30px;
  margin-top: 30px;
  border-top: 1px solid #334155;
  font-size: 13px;
}

/* ========== BACK TO TOP BUTTON ========== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6b5cff, #4338ff);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 1000;
  box-shadow: 0 5px 15px rgba(107, 92, 255, 0.3);
}
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(107, 92, 255, 0.4); }

/* ========== RESPONSIVE ========== */
@media (max-width: 1200px) {
  .navbar { padding: 0 28px; }
  .nav-menu { gap: 10px; }
  .nav-menu li a { padding: 10px 12px; font-size: 14px; }
}

@media (max-width: 1024px) {
  .post-container { grid-template-columns: 1fr; }
  .post-sidebar { position: static; }
  .reasons-grid,
  .requirements-grid,
  .advantages-grid,
  .problems-grid,
  .tips-grid,
  .rejection-grid,
  .steps-container,
  .future-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
  .navbar {
    height: 76px;
    padding: 0 20px;
    flex-direction: row;
  }

  .logo h2 {
    font-size: 21px;
  }

  .logo-icon {
    width: 40px;
    height: 40px;
    font-size: 21px;
  }

  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    opacity: 0;
    padding: 0 20px;
    border-bottom: 1px solid #ececf8;
    box-shadow: 0 18px 35px rgba(15, 23, 42, 0.12);
    transition: all 0.35s ease;
  }

  .nav-toggle:checked ~ .nav-menu {
    max-height: 80vh;
    visibility: visible;
    opacity: 1;
    padding: 16px 20px 22px;
  }

  .nav-menu li a {
    text-align: center;
    padding: 13px 15px;
    border-radius: 12px;
  }

  .nav-toggle:checked + .hamburger span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-toggle:checked + .hamburger span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle:checked + .hamburger span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

@media (max-width: 768px) {
  .post-header h1 { font-size: 32px; }
  .post-content { padding: 25px; }
  .table-of-contents ul { grid-template-columns: 1fr; }
  .reasons-grid,
  .requirements-grid,
  .advantages-grid,
  .problems-grid,
  .tips-grid,
  .rejection-grid,
  .steps-container,
  .future-grid {
    grid-template-columns: 1fr;
  }
  .guide-step { flex-direction: column; text-align: center; }
  .guide-icon { margin: 0 auto; }
  .benefit-row { flex-direction: column; text-align: center; }
  .benefit-row i { margin: 0 auto; }
  .author-bio { flex-direction: column; text-align: center; }
  .author-bio img { margin: 0 auto; }
  .comment { flex-direction: column; text-align: center; }
  .comment img { margin: 0 auto; }
  .info-note { flex-direction: column; text-align: center; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-content { grid-template-columns: 1fr; text-align: center; }
  .footer-logo { justify-content: center; }
  .social-links { justify-content: center; }
  .share-buttons { flex-wrap: wrap; }
  .back-to-top { bottom: 20px; right: 20px; width: 45px; height: 45px; font-size: 18px; }
}

@media (max-width: 480px) {
  .navbar {
    padding: 0 14px;
  }

  .logo {
    gap: 10px;
  }

  .logo h2 {
    font-size: 19px;
  }

  .post-header h1 { font-size: 28px; }
  .post-section h2 { font-size: 26px; }
  .cta-box { padding: 25px; }
}

/* ========== PRINT STYLES ========== */
@media print {
  .navbar, .footer, .sidebar, .related-posts, .skip-link, .back-to-top, .share-buttons { display: none; }
  .post-content { padding: 0; box-shadow: none; }
  .post-container { display: block; }
  body { background: white; }
  .comment-form { display: none; }
}

/* ========== SELECTION ========== */
::selection { background: #4f46ff; color: white; }
::-moz-selection { background: #4f46ff; color: white; }