/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--text-base);
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 150ms ease;
  border: 1px solid transparent;
  gap: var(--spacing-2);
}

.btn-primary {
  background-color: var(--color-blue);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-navy);
  color: var(--color-white);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-secondary, .btn-outline {
  background-color: transparent;
  border-color: var(--color-navy);
  color: var(--color-navy);
}

.btn-secondary:hover, .btn-outline:hover {
  background-color: var(--color-navy);
  color: var(--color-white);
}

.btn-secondary:focus-visible, .btn-outline:focus-visible {
  outline: 2px solid var(--color-navy);
  outline-offset: 2px;
}

/* Nav Bar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-4) var(--spacing-8);
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  position: sticky;
  top: 0;
  z-index: 99;
  transition: padding 300ms ease, box-shadow 300ms ease;
}

.navbar.is-scrolled {
  padding: var(--spacing-2) var(--spacing-8);
  box-shadow: var(--shadow-md);
}

.nav-brand {
  display: flex;
  align-items: center;
}

.nav-brand img {
  height: auto;
  max-height: 56px;
  width: auto;
  object-fit: contain;
  display: block;
}

.nav-links {
  display: flex;
  gap: var(--spacing-6);
  align-items: center;
}

.nav-link {
  color: var(--color-gray-600);
  font-weight: 500;
  position: relative;
  padding: var(--spacing-2) 0;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-blue);
  transition: width 250ms ease;
}

.nav-link:hover {
  color: var(--color-navy);
}

.nav-link:hover::after {
  width: 100%;
}

/* Dropdown */
.nav-item-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  min-width: 240px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 250ms ease;
  z-index: 10;
  padding: var(--spacing-2) 0;
}

.nav-item-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: var(--spacing-2) var(--spacing-4);
  color: var(--color-gray-600);
  font-size: var(--text-sm);
  transition: background-color 150ms ease, color 150ms ease;
}

.dropdown-item:hover {
  background-color: var(--color-gray-50);
  color: var(--color-navy);
}

/* Mobile Hamburger Menu */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-2);
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-navy);
  margin-bottom: 5px;
  transition: transform 250ms ease, opacity 250ms ease;
}

.hamburger-line:last-child {
  margin-bottom: 0;
}

/* Drawer */
.mobile-drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(10, 31, 68, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 300ms ease;
  z-index: 90;
}

.mobile-drawer-overlay.is-active {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 85%;
  max-width: 320px;
  height: 100vh;
  background-color: var(--color-white);
  box-shadow: var(--shadow-md);
  z-index: 100;
  transition: right 300ms ease;
  padding: var(--spacing-6);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.mobile-drawer.is-open {
  right: 0;
}

.mobile-drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-8);
}

.drawer-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-gray-500);
}

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.drawer-link {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-navy);
  display: block;
}

.drawer-sub-links {
  padding-left: var(--spacing-4);
  margin-top: var(--spacing-2);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.drawer-sub-links a {
  color: var(--color-gray-500);
  font-size: var(--text-sm);
}

@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }
  .hamburger {
    display: block;
  }
}

/* Article Card */
.article-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card-image-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: var(--color-gray-100);
  overflow: hidden;
  position: relative;
}

.card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 400ms ease;
}

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

.card-content {
  padding: var(--spacing-6);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-tag {
  align-self: flex-start;
  margin-bottom: var(--spacing-3);
}

.card-title {
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-2);
  color: var(--color-navy);
  line-height: 1.3;
}

.card-excerpt {
  color: var(--color-gray-600);
  font-size: var(--text-sm);
  margin-bottom: var(--spacing-6);
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-gray-500);
  font-size: var(--text-xs);
  border-top: 1px solid var(--color-gray-100);
  padding-top: var(--spacing-4);
  margin-top: auto;
  font-family: 'Inter', sans-serif;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
}

/* Tag / Pill */
.tag-pill {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-1) var(--spacing-3);
  background-color: rgba(90, 157, 255, 0.1);
  color: var(--color-navy);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Section Heading Pattern */
.section-header {
  margin-bottom: var(--spacing-12);
  text-align: center;
}

.section-header.text-left {
  text-align: left;
}

.eyebrow-label {
  display: inline-block;
  color: var(--color-blue);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-2);
}

.section-title {
  font-size: var(--text-4xl);
  color: var(--color-navy);
  margin-bottom: var(--spacing-4);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-gray-600);
  max-width: 600px;
  margin: 0 auto;
}
.text-left .section-subtitle {
  margin-left: 0;
}

/* Blueprint Divider / Background */
.blueprint-bg {
  background-color: var(--color-gray-50);
  background-image: 
    linear-gradient(var(--color-blueprint) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-blueprint) 1px, transparent 1px);
  background-size: 40px 40px;
  padding: var(--spacing-16) 0;
}

/* Footer */
.site-footer {
  background-color: var(--color-navy);
  color: var(--color-white);
  padding: var(--spacing-16) var(--spacing-8) var(--spacing-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 2fr;
  gap: var(--spacing-16);
  margin-bottom: var(--spacing-12);
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

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

.footer-col h4 {
  color: var(--color-white);
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-6);
}

.footer-col p {
  color: var(--color-gray-300);
  font-size: var(--text-sm);
}

.footer-brand {
  display: inline-block;
  margin-bottom: var(--spacing-4);
}

.footer-brand img {
  height: auto;
  max-height: 80px;
  width: auto;
  object-fit: contain;
  display: block;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.footer-links a {
  color: var(--color-gray-300);
  font-size: var(--text-sm);
  transition: color 150ms ease;
}

.footer-links a:hover {
  color: var(--color-white);
}

.newsletter-form {
  display: flex;
  gap: var(--spacing-2);
  margin-top: var(--spacing-4);
}

.newsletter-input {
  flex-grow: 1;
  padding: var(--spacing-3);
  border: 1px solid var(--color-gray-600);
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  border-radius: var(--radius-sm);
}

.newsletter-input::placeholder {
  color: var(--color-gray-400);
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--color-blue);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-gray-400);
  font-size: var(--text-sm);
  font-family: 'Inter', sans-serif;
}

@media (max-width: 480px) {
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-4);
    text-align: center;
  }
}

/* --- New Section Headers with Actions --- */
.section-header-action {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 2px solid var(--color-navy);
  padding-bottom: var(--spacing-4);
  margin-bottom: var(--spacing-8);
}

.header-action-left {
  max-width: 60%;
}

.header-action-right {
  display: flex;
  gap: var(--spacing-2);
}

.btn-filter {
  background: var(--color-gray-100);
  color: var(--color-navy);
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 150ms ease;
}

.btn-filter.active {
  background: var(--color-navy);
  color: var(--color-white);
}

.btn-filter:hover:not(.active) {
  background: var(--color-gray-200);
}

@media (max-width: 768px) {
  .section-header-action {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-4);
  }
  .header-action-left {
    max-width: 100%;
  }
}

/* --- Library Card Footer --- */
.card-author-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  margin-top: var(--spacing-4);
  border-top: 1px solid var(--color-gray-100);
  padding-top: var(--spacing-4);
}

.author-avatar {
  width: 32px;
  height: 32px;
  background: var(--color-gray-200);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-navy);
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-navy);
}

.author-title {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

/* --- News List Card --- */
.news-list-card {
  display: flex;
  gap: var(--spacing-6);
  margin-bottom: var(--spacing-8);
  padding-bottom: var(--spacing-8);
  border-bottom: 1px solid var(--color-gray-200);
}

.news-list-card:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.news-list-image-wrap {
  flex: 0 0 160px;
  aspect-ratio: 4 / 3;
  background: var(--color-gray-100);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.news-list-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 400ms ease;
}

.news-list-card:hover .news-list-image-wrap img {
  transform: scale(1.05);
}

.news-list-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.news-date {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-2);
}

.news-list-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: var(--spacing-2);
  line-height: 1.3;
}

.news-list-excerpt {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-2);
}

.news-read-more {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-warning);
  text-transform: uppercase;
  letter-spacing: 1px;
}

@media (max-width: 768px) {
  .news-list-card {
    flex-direction: column;
  }
  .news-list-image-wrap {
    flex: auto;
    width: 100%;
  }
}

/* --- Review Catalog Card --- */
.review-catalog-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: var(--spacing-6);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.review-catalog-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-6);
  border-bottom: 1px solid var(--color-gray-100);
  padding-bottom: var(--spacing-4);
}

.review-brand {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
  margin-bottom: var(--spacing-1);
}

.review-model {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-navy);
}

.review-rating {
  background: var(--color-blue);
  color: var(--color-white);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: var(--text-lg);
  font-family: "Inter", sans-serif;
  white-space: nowrap;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  position: absolute;
  bottom: var(--spacing-2);
  right: var(--spacing-2);
  box-shadow: var(--shadow-sm);
}

.review-spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-6);
}

.spec-item {
  display: flex;
  flex-direction: column;
}

.spec-label {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-1);
}

.spec-value {
  font-size: var(--text-sm);
  color: var(--color-navy);
  font-weight: 500;
}

.review-pros-cons {
  border-top: 1px solid var(--color-gray-100);
  padding-top: var(--spacing-4);
  margin-bottom: var(--spacing-6);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.pc-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-2);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
}

.pc-icon.pro {
  color: var(--color-success);
}
.pc-icon.con {
  color: var(--color-gray-400);
}

.review-catalog-card .btn {
  width: 100%;
  margin-top: auto;
}



/* --- Standard Section Heading --- */
.section-eyebrow {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-blue);
  text-transform: uppercase;
  font-family: 'Inter', sans-serif;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-2);
}

.section-title {
  font-size: var(--text-4xl);
  color: var(--color-navy);
  margin-bottom: var(--spacing-4);
  line-height: 1.2;
}

.section-subtitle {
  color: var(--color-gray-600);
  font-size: var(--text-base);
  max-width: 600px;
}

/* --- Sprint 2 Components --- */

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-family: 'Inter', sans-serif;
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-8);
}

.breadcrumb a {
  color: var(--color-gray-500);
  text-decoration: none;
  transition: color 150ms ease;
}

.breadcrumb a:hover {
  color: var(--color-blue);
}

.breadcrumb span {
  color: var(--color-gray-400);
}

/* Filter Chips */
.filter-chips-container {
  display: flex;
  gap: var(--spacing-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-12);
}

.filter-chip {
  background: var(--color-gray-100);
  color: var(--color-gray-600);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-family: 'Inter', sans-serif;
  text-decoration: none;
  transition: all 200ms ease;
  border: 1px solid transparent;
}

.filter-chip:hover {
  background: var(--color-gray-200);
}

.filter-chip.active {
  background: var(--color-navy);
  color: var(--color-white);
}

/* Callout Box (ข้อควรรู้) */
.callout-box {
  background: var(--color-gray-50);
  border-left: 4px solid var(--color-blue);
  padding: var(--spacing-6);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: var(--spacing-8) 0;
}

.callout-box-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--color-navy);
  font-weight: 700;
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-2);
}

.callout-box p {
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-gray-700);
}

/* Comparison Table */
.comparison-table-wrapper {
  overflow-x: auto;
  margin: var(--spacing-8) 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-gray-200);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th,
.comparison-table td {
  padding: var(--spacing-4);
  border-bottom: 1px solid var(--color-gray-200);
}

.comparison-table th {
  background: var(--color-gray-50);
  color: var(--color-navy);
  font-weight: 700;
  font-family: 'Inter', sans-serif;
  font-size: var(--text-sm);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

/* Spec Summary Table (Review Article) */
.spec-summary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-4);
  background: var(--color-gray-50);
  padding: var(--spacing-6);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-8);
}

.spec-summary-item {
  display: flex;
  flex-direction: column;
}

.spec-summary-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  color: var(--color-gray-500);
  font-weight: 600;
  letter-spacing: 1px;
}

.spec-summary-value {
  font-size: var(--text-base);
  color: var(--color-navy);
  font-weight: 500;
}

/* Comment / Q&A Section */
.comment-section {
  margin-top: var(--spacing-16);
  padding-top: var(--spacing-12);
  border-top: 1px solid var(--color-gray-200);
}

.comment-input-box {
  background: var(--color-gray-50);
  padding: var(--spacing-6);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-8);
}

.comment-input-box textarea {
  width: 100%;
  min-height: 100px;
  padding: var(--spacing-4);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-4);
  font-family: inherit;
  resize: vertical;
}

.comment-item {
  display: flex;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-8);
}

.comment-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-gray-500);
  flex-shrink: 0;
}

.comment-body {
  flex: 1;
}

.comment-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-2);
}

.comment-author {
  font-weight: 700;
  color: var(--color-navy);
}

.comment-time {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
}

.comment-text {
  color: var(--color-gray-700);
  line-height: 1.6;
}


/* Active Nav Link */
.nav-link.active-link, .drawer-link.active-link {
  color: var(--color-blue);
  font-weight: 700;
}
.nav-link.active-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-blue);
  border-radius: 2px;
}