/* Global Base */
:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-accent: #0891b2;
  --color-bg: #f8fafc;
  --color-bg-alt: #f1f5f9;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-border: rgba(15, 23, 42, 0.12);
  --shadow-soft: 0 4px 20px rgba(15, 23, 42, 0.08);
  --shadow-hover: 0 8px 30px rgba(37, 99, 235, 0.15);
  --max-width: 1200px;
  font-size: 16px;
}

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

body {
  font-family: "Segoe UI", Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  width: 100%;
  object-fit: cover;
}

main {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.btn {
  border: none;
  background: var(--color-primary);
  color: #fff;
  padding: 0.6rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn:hover,
.btn:focus {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-soft);
  transform: translateY(-2px);
}

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

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

.badge {
  background: #e0f2fe;
  color: #0369a1;
  padding: 0.2rem 0.6rem;
  border-radius: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.nav-container {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
}

.nav-brand span {
  display: none;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.mobile-only {
  display: none;
}

.nav-menu > li {
  list-style: none;
  position: relative;
}

.nav-menu > li > a {
  padding: 0.5rem 0.75rem;
  border-radius: 0.45rem;
  transition: background 0.3s ease;
  font-weight: 500;
  color: var(--color-text-muted);
}

.nav-menu > li > a.active {
  color: var(--color-primary);
  background: rgba(37, 99, 235, 0.08);
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.12);
}

.nav-menu > li > a:hover,
.nav-menu > li > a:focus {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

.nav-menu li ul {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  background: var(--color-surface);
  min-width: 220px;
  padding: 0.75rem 0;
  border-radius: 0.75rem;
  box-shadow: var(--shadow-soft);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.nav-menu li:hover ul,
.nav-menu li:focus-within ul,
.nav-menu li.open ul {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-menu li ul li {
  list-style: none;
}

.nav-menu li ul li a {
  display: block;
  padding: 0.6rem 1.25rem;
  color: var(--color-text-muted);
  transition: background 0.3s ease, color 0.3s ease;
}

.nav-menu li ul li a:hover,
.nav-menu li ul li a:focus {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* Nav submenu support (for multi-level categories) */
.nav-menu li ul li.nav-has-submenu {
  position: relative;
}

.nav-menu li ul li ul {
  left: 100%;
  top: 0;
  margin-top: 0;
  margin-left: 0.5rem;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: 1.75rem;
  cursor: pointer;
}

/* Hero Carousel */
.hero-container {
  margin: 2.5rem auto 2rem;
  width: min(100%, var(--max-width));
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 1.5rem;
}

.hero {
  border-radius: 1.5rem;
  overflow: hidden;
  position: relative;
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
}

.hero-track {
  display: flex;
  transition: transform 0.6s ease;
}

.hero-slide {
  min-width: 100%;
  position: relative;
  height: clamp(280px, 35vw, 400px);
}

.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-slide::after {
  display: none;
}

.hero-content {
  display: none;
}

.hero-controls {
  position: absolute;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 10;
  pointer-events: auto;
}

.hero-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  border: none;
  cursor: pointer;
  pointer-events: auto;
  transition: transform 0.3s ease, background 0.3s ease;
}

.hero-dot.active {
  background: var(--color-accent);
  transform: scale(1.2);
}

/* Pinned Articles Sidebar */
.pinned-articles {
  background: var(--color-surface);
  border-radius: 1.5rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pinned-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-border);
}

.pinned-title i {
  color: var(--color-primary);
  font-size: 0.95rem;
}

.pinned-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  flex: 1;
}

.pinned-item {
  display: flex;
  gap: 0.75rem;
  padding: 0.75rem;
  border-radius: 0.75rem;
  transition: all 0.3s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.pinned-item:hover {
  background: var(--color-bg-alt);
  border-color: var(--color-primary);
  transform: translateX(4px);
}

.pinned-item img {
  width: 80px;
  height: 60px;
  border-radius: 0.5rem;
  object-fit: cover;
  flex-shrink: 0;
}

.pinned-item-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.pinned-item h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.4;
}

.pinned-item-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.pinned-item-meta i {
  font-size: 0.7rem;
}

.pinned-item-price {
  color: #ef4444;
  font-weight: 700;
  font-size: 0.85rem;
}

.skeleton-pinned-item {
  height: 76px;
  background: linear-gradient(90deg, #eef2ff 0%, #f8fafc 50%, #eef2ff 100%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.2s ease infinite;
  border-radius: 0.75rem;
}

.pinned-empty {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* Section Heading */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 2.5rem 0 1.5rem;
  gap: 1rem;
}

.category-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.category-tab {
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  transition: all 0.3s ease;
  font-weight: 500;
}

.category-tab:hover,
.category-tab:focus {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.15);
  transform: translateY(-2px);
}

.category-tab.active {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.12), rgba(99, 102, 241, 0.18));
  color: var(--color-primary);
  border-color: transparent;
  box-shadow: inset 0 0 0 1px rgba(79, 70, 229, 0.28);
}

.skeleton-card {
  position: relative;
  overflow: hidden;
}

.skeleton-image {
  height: 180px;
  background: linear-gradient(90deg, #eef2ff 0%, #f8fafc 50%, #eef2ff 100%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.2s ease infinite;
}

.skeleton-line {
  height: 16px;
  margin-top: 12px;
  border-radius: 6px;
  background: linear-gradient(90deg, #eef2ff 0%, #f8fafc 50%, #eef2ff 100%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.2s ease infinite;
}

.skeleton-line.short {
  width: 60%;
}

.skeleton-tab {
  width: 120px;
  height: 40px;
  background: linear-gradient(90deg, #eef2ff 0%, #f8fafc 50%, #eef2ff 100%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.2s ease infinite;
  border: none;
}

.skeleton-hero {
  min-height: 360px;
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.page-btn {
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid #e5e7eb;
  background: white;
  color: #64748b;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
}

.page-btn:hover {
  border-color: #3b82f6;
  color: #3b82f6;
  background: #eff6ff;
}

.page-btn.active {
  border-color: #3b82f6;
  background: #3b82f6;
  color: white;
}

.page-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.page-dots {
  color: #cbd5e1;
  padding: 0 8px;
}

.section-header h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
}

.section-header a {
  color: var(--color-text-muted);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.section-header a:hover,
.section-header a:focus {
  color: #fff;
}

/* Article Grid */
.article-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.75rem;
}

@media (max-width: 1024px) {
  .article-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .article-grid {
    grid-template-columns: 1fr;
  }
}

.article-card {
  background: var(--color-surface);
  border-radius: 1rem;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.article-card img {
  height: 180px;
}

.article-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.article-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.85rem;
  flex: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.article-meta i {
  margin-right: 0.35rem;
  font-size: 0.9rem;
}

.pagination {
  margin: 2.5rem 0 0;
  display: flex;
  justify-content: center;
  gap: 0.6rem;
}

.pagination button {
  width: 42px;
  height: 42px;
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.3s ease, transform 0.3s ease;
  font-weight: 500;
}

.pagination button.active,
.pagination button:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
}

/* Footer */
footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--color-text-muted);
  background: var(--color-surface);
  margin-top: 4rem;
}

/* Auth Pages */
.auth-wrapper {
  min-height: calc(100vh - 120px);
  display: grid;
  place-items: center;
  padding: 3rem 1.5rem;
}

.auth-card {
  width: min(100%, 420px);
  background: var(--color-surface);
  border-radius: 1.2rem;
  padding: clamp(2rem, 4vw, 2.75rem);
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.auth-card h1 {
  font-size: 1.75rem;
}

.auth-card p {
  color: var(--color-text-muted);
}

form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 500;
  color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 0.85rem 1rem;
  color: var(--color-text);
  font-size: 1rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-footer {
  display: flex;
  justify-content: center;
  color: var(--color-text-muted);
  gap: 0.5rem;
  font-size: 0.95rem;
}

/* Article Detail */
.detail-hero {
  margin: 2.5rem auto;
  width: min(100%, var(--max-width));
  display: grid;
  gap: 2rem;
  grid-template-columns: 1.3fr 1fr;
}

.detail-gallery {
  background: var(--color-surface);
  border-radius: 1.25rem;
  padding: 1.5rem;
  display: grid;
  gap: 1rem;
}

.detail-gallery img {
  border-radius: 1rem;
}

.thumbs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.75rem;
}

.thumbs img {
  height: 80px;
  opacity: 0.65;
  border: 2px solid transparent;
  cursor: pointer;
  transition: opacity 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
}

.thumbs img.active,
.thumbs img:hover {
  opacity: 1;
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.detail-purchase {
  background: var(--color-surface);
  border-radius: 1.25rem;
  padding: clamp(1.75rem, 4vw, 2.5rem);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--color-border);
}

.detail-purchase h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
}

.detail-purchase .btn-outline {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.detail-purchase .btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.price {
  font-size: 2rem;
  font-weight: 700;
  color: #dc2626;
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.detail-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.detail-meta i {
  color: var(--color-primary);
  font-size: 1rem;
}

.quantity-selector {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.quantity-selector button {
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 1.2rem;
  cursor: pointer;
  transition: background 0.3s ease;
}

.quantity-selector button:hover {
  background: var(--color-bg-alt);
}

.quantity-selector input {
  width: 60px;
  text-align: center;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 0.6rem;
  color: var(--color-text);
}

.detail-content {
  width: min(100%, var(--max-width));
  margin: 3rem auto;
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
  gap: 2.5rem;
}

.detail-content-full {
  grid-template-columns: 1fr;
  max-width: 900px;
}

/* Blog Article Styles (Free Articles) */
.blog-article {
  max-width: 900px;
  margin: 2rem auto;
  background: var(--color-surface);
  border-radius: 0.75rem;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.blog-header {
  padding: 2.5rem 3rem 1.5rem;
  background: var(--color-surface);
}

.blog-title {
  font-size: 1.85rem;
  color: var(--color-text);
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 1rem;
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.blog-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.blog-meta i {
  color: var(--color-primary);
  font-size: 0.85rem;
}

.blog-featured-image {
  padding: 0 3rem;
  margin: 1.5rem 0;
}

.blog-featured-image img {
  width: 50%;
  height: auto;
  display: block;
  border-radius: 0.5rem;
}

.blog-excerpt {
  margin: 0 3rem 1.5rem;
  padding: 1rem 1.25rem;
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-primary);
  border-radius: 0.25rem;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.blog-content {
  padding: 0 3rem 3rem;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
}

.blog-content p {
  margin: 1rem 0;
}

.blog-content h1,
.blog-content h2,
.blog-content h3 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
}

.blog-content h1 {
  font-size: 1.65rem;
}

.blog-content h2 {
  font-size: 1.45rem;
}

.blog-content h3 {
  font-size: 1.2rem;
}

.blog-content img {
  max-width: 50%;
  height: auto;
  border-radius: 0.5rem;
  margin: 1.5rem 0;
}

.blog-content ul,
.blog-content ol {
  margin: 1rem 0;
  padding-left: 1.75rem;
}

.blog-content li {
  margin: 0.5rem 0;
}

.blog-content blockquote {
  border-left: 3px solid var(--color-primary);
  margin: 1.5rem 0;
  padding: 0.75rem 1.25rem;
  background: var(--color-bg-alt);
  border-radius: 0.25rem;
  color: var(--color-text-muted);
}

.blog-content code {
  background: var(--color-bg-alt);
  padding: 0.2rem 0.4rem;
  border-radius: 0.25rem;
  font-size: 0.9em;
  font-family: 'Consolas', 'Monaco', monospace;
  color: #e11d48;
}

.blog-content pre {
  background: #1e293b;
  color: #e2e8f0;
  padding: 1.25rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.blog-content pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

.blog-content a {
  color: var(--color-primary);
  text-decoration: underline;
  transition: color 0.3s ease;
}

.blog-content a:hover {
  color: var(--color-primary-dark);
}

.blog-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.blog-content table th,
.blog-content table td {
  border: 1px solid var(--color-border);
  padding: 0.65rem 0.85rem;
  text-align: left;
}

.blog-content table th {
  background: var(--color-bg-alt);
  font-weight: 600;
}

.article-richtext,
.sidebar-card {
  background: var(--color-surface);
  border-radius: 1.25rem;
  padding: clamp(1.75rem, 4vw, 2.4rem);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.article-richtext h2 {
  font-size: 1.4rem;
}

.article-richtext p {
  color: var(--color-text-muted);
}

.article-richtext ul {
  list-style: none;
  padding-left: 0;
}

.article-richtext ul li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--color-text-muted);
}

.article-richtext ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
  font-size: 1.1rem;
}

.sidebar-card h3 {
  font-size: 1.2rem;
}

.sidebar-list {
  display: grid;
  gap: 1rem;
}

.sidebar-item {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sidebar-item img {
  height: 80px;
  border-radius: 0.75rem;
}

.sidebar-item h4 {
  font-size: 1rem;
  margin-bottom: 0.35rem;
}

.sidebar-item span {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.sidebar-item i {
  font-size: 0.8rem;
  color: #f97316;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
}

.spec-card {
  background: var(--color-bg-alt);
  border-radius: 1rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
}

.spec-card span {
  display: block;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.spec-card strong {
  display: block;
  font-size: 1.15rem;
  margin-top: 0.35rem;
}

/* Floating Contact */
.contact-float {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(2rem, 5vw, 3rem);
  z-index: 1200;
}

.contact-trigger {
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  writing-mode: vertical-rl;
  padding: 1.2rem 0.7rem;
  border-radius: 0.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  letter-spacing: 0.1em;
  border: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-trigger:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(37, 99, 235, 0.3);
}

/* Contact Modal */
.contact-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.contact-modal.show {
  opacity: 1;
}

.contact-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.contact-modal-content {
  position: relative;
  background: var(--color-surface);
  border-radius: 1.25rem;
  padding: 2.5rem 2rem;
  max-width: 700px;
  width: 90%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.contact-modal.show .contact-modal-content {
  transform: scale(1);
}

.contact-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  border: none;
  font-size: 24px;
  line-height: 1;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-modal-close:hover {
  background: #ef4444;
  color: white;
  transform: rotate(90deg);
}

.contact-modal-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: center;
}

.contact-modal-title i {
  color: var(--color-primary);
}

.contact-modal-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  margin: 0 0 2rem;
  font-size: 0.95rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1.5rem;
  justify-items: center;
}

.contact-item {
  text-align: center;
  transition: transform 0.3s ease;
}

.contact-item:hover {
  transform: translateY(-5px);
}

.contact-qr {
  width: 160px;
  height: 160px;
  border-radius: 0.75rem;
  overflow: hidden;
  margin: 0 auto 0.75rem;
  border: 2px solid var(--color-border);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.contact-item:hover .contact-qr {
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.contact-qr img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.contact-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
  }
  
  .pinned-articles {
    display: none;
  }
  
  .nav-menu {
    position: fixed;
    top: 68px;
    right: 1.5rem;
    left: 1.5rem;
    background: rgba(255, 255, 255, 0.98);
    border-radius: 1.2rem;
    border: 1px solid var(--color-border);
    padding: 1.5rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: auto;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }

  .nav-menu.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-menu > li {
    border-bottom: 1px solid var(--color-border);
  }

  .nav-menu > li:last-child {
    border-bottom: none;
  }

  .nav-menu > li > a {
    display: block;
    padding: 1rem;
    width: 100%;
  }

  .nav-menu li ul {
    position: static;
    background: var(--color-bg-alt);
    box-shadow: none;
    width: 100%;
    margin: 0;
    padding: 0;
    border-radius: 0.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .nav-menu li.open ul {
    max-height: 500px;
    padding: 0.5rem 0;
    margin-bottom: 0.5rem;
  }

  .nav-menu li ul li a {
    padding: 0.75rem 1.5rem;
  }

  .nav-actions {
    display: none;
  }
  
  .mobile-only {
    display: block !important;
  }
  
  .mobile-action-link {
    font-weight: 500;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .detail-hero {
    grid-template-columns: 1fr;
  }

  .detail-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  main {
    padding: 0 1.25rem 3.5rem;
  }

  .hero-container {
    margin: 1.5rem auto 1.5rem;
  }

  .hero {
    border-radius: 1.25rem;
  }

  .hero-controls {
    right: 50%;
    transform: translateX(50%);
  }

  .article-card img {
    height: 160px;
  }

  .article-richtext,
  .sidebar-card {
    padding: 1.75rem;
  }
  
  .blog-article {
    margin: 1rem;
    border-radius: 0.5rem;
  }
  
  .blog-header {
    padding: 1.75rem 1.5rem 1rem;
  }
  
  .blog-title {
    font-size: 1.5rem;
  }
  
  .blog-meta {
    gap: 0.85rem;
    font-size: 0.85rem;
  }
  
  .blog-featured-image {
    padding: 0 1.5rem;
    margin: 1.25rem 0;
  }
  
  .blog-featured-image img {
    width: 100%;
  }
  
  .blog-excerpt {
    margin: 0 1.5rem 1.25rem;
    padding: 0.85rem 1rem;
    font-size: 0.9rem;
  }
  
  .blog-content {
    padding: 0 1.5rem 2rem;
    font-size: 0.95rem;
  }
  
  .blog-content img {
    max-width: 100%;
  }
  
  .contact-modal-content {
    padding: 2rem 1.5rem;
    width: 95%;
  }
  
  .contact-modal-title {
    font-size: 1.5rem;
  }
  
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
  
  .contact-qr {
    width: 130px;
    height: 130px;
  }
  
  .contact-name {
    font-size: 0.85rem;
  }
}

@media (max-width: 540px) {
  :root {
    font-size: 15px;
  }

  .nav-container {
    padding: 0.75rem 1rem;
  }

  .hero-content {
    max-width: 100%;
  }

  .contact-panel {
    width: min(240px, 80vw);
  }

  .sidebar-item {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

.payment-qr img {
  max-width: 300px;
  border-radius: 12px;
  margin: 20px 0;
}

.payment-qr {
  position: relative;
  overflow: hidden;
}

.payment-qr::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top, rgba(79, 70, 229, 0.08), transparent 60%);
  pointer-events: none;
}

.qr-thumb-bar {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.qr-thumb {
  border: 2px solid transparent;
  border-radius: 10px;
  width: 70px;
  height: 70px;
  overflow: hidden;
  padding: 0;
  background: transparent;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.qr-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.qr-thumb:hover {
  transform: translateY(-2px);
}

.qr-thumb.active {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.qr-empty {
  font-size: 14px;
  color: #9ca3af;
  text-align: center;
  margin: 0;
  width: 100%;
}

.payment-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 15px;
  margin-bottom: 30px;
}

.payment-method {
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
}

.payment-method:hover {
  border-color: #667eea;
}

.payment-method.selected {
  border-color: #667eea;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
}

.payment-method.selected::after {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  top: 12px;
  right: 14px;
  color: #2563eb;
  background: #e0f2fe;
  border-radius: 50%;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  box-shadow: 0 6px 12px rgba(37, 99, 235, 0.18);
}

.payment-method i {
  font-size: 36px;
  margin-bottom: 10px;
}