/* ============================================================
   COMPONENTS.CSS — Nav, Buttons, Cards, Tags, Footer, Forms
   The Architect | Phan Hai Nga Advisory
   ============================================================ */

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: 1.25rem 0;
  transition: background-color var(--transition-base),
    padding var(--transition-base),
    box-shadow var(--transition-base);
}

/* Nav luôn nền trắng để tách biệt rõ với hero nền xanh đậm phía dưới */
.nav--transparent {
  background-color: var(--color-white);
  box-shadow: 0 1px 0 rgba(11, 46, 99, 0.08);
}

.nav--scrolled {
  background-color: var(--color-white);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 0.875rem 0;
  box-shadow: 0 2px 24px rgba(11, 46, 99, 0.14);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  text-decoration: none;
}

.nav__logo-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.nav__logo-text {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.nav__logo-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-navy);
  letter-spacing: 0.05em;
  line-height: 1.2;
}

.nav__logo-tagline {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  line-height: 1;
}

/* Menu links */
.nav__menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-dark);
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.03em;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

.nav__link:hover {
  color: var(--color-navy);
  background-color: rgba(var(--color-navy-rgb), 0.06);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: calc(100% - 1.75rem);
}

.nav__link--active {
  color: var(--color-accent);
}

.nav__cta {
  margin-left: 1rem;
}

/* Mobile hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-navy);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base), width var(--transition-base);
  transform-origin: center;
}

.nav__toggle--open .nav__toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle--open .nav__toggle-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__toggle--open .nav__toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.nav__mobile {
  display: none;
  flex-direction: column;
  gap: 0;
  padding: 1rem 0 1.5rem;
  border-top: 1px solid rgba(var(--color-navy-rgb), 0.1);
  margin-top: 0.75rem;
}

.nav__mobile.nav__mobile--open {
  display: flex;
}

.nav__mobile .nav__link {
  padding: 0.875rem 0;
  border-radius: 0;
  border-bottom: 1px solid rgba(var(--color-navy-rgb), 0.08);
  font-size: var(--text-body);
}

.nav__mobile .nav__link::after {
  display: none;
}

.nav__mobile .btn {
  margin-top: 1rem;
  width: 100%;
  justify-content: center;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

/* Ripple effect */
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.1);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.btn:hover::before {
  transform: scaleX(1);
}

/* Primary */
.btn--primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(10, 102, 194, 0.3);
}

/* Đảm bảo chữ màu đen/navy khi nút nằm trên các vùng nền tối (nút biến thành màu trắng) */
.hero .btn--primary,
.section--dark .btn--primary,
.cta-section .btn--primary,
.journey-section .btn--primary,
.footer .btn--primary {
  color: var(--color-navy);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(10, 102, 194, 0.45);
}

.btn--primary:active {
  transform: translateY(0);
}

/* Secondary — Outlined */
.btn--secondary {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255, 255, 255, 0.4);
}

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

/* Dark outlined */
.btn--outline-dark {
  background: transparent;
  color: var(--color-navy);
  border: 1.5px solid var(--color-navy);
}

.btn--outline-dark:hover {
  background: var(--color-navy);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* Gold outlined */
.btn--outline-accent {
  background: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn--outline-accent:hover {
  background: var(--color-accent);
  color: var(--color-navy);
  transform: translateY(-2px);
}

/* Sizes */
.btn--lg {
  font-size: var(--text-body);
  padding: 1rem 2.25rem;
}

.btn--sm {
  font-size: var(--text-xs);
  padding: 0.5rem 1.25rem;
}

/* Icon button */
.btn__icon {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-base);
}

.btn:hover .btn__icon {
  transform: translateX(3px);
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(10, 102, 194, 0.25);
}

/* Card — Dark variant */
.card--dark {
  background: var(--color-navy-mid);
  border-color: rgba(255, 255, 255, 0.08);
}

/* Tren nen section--navy-mid, card--dark trung mau 100% voi nen (ca hai deu
   dung --color-navy-mid) nen bi chim khong phan biet duoc — can nen sang hon
   nen xung quanh de thay ro khung the. */
.section--navy-mid .card--dark {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.18);
}

.section--navy-mid .card--dark:hover {
  border-color: rgba(255, 255, 255, 0.35);
}

.card--dark:hover {
  border-color: rgba(10, 102, 194, 0.4);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

/* Card Image */
.card__image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-navy-mid);
}

.card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card__image img {
  transform: scale(1.05);
}

/* Card image placeholder */
.card__image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-navy), var(--color-navy-mid));
}

/* Card Body */
.card__body {
  padding: 1.5rem;
}

.card__body--lg {
  padding: 2rem;
}

/* Card Meta */
.card__meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.875rem;
  flex-wrap: wrap;
}

.card__date {
  font-family: var(--font-label);
  font-size: var(--text-xs);
  color: var(--color-gray-mid);
  font-weight: 500;
}

.card__read-time {
  font-family: var(--font-label);
  font-size: var(--text-xs);
  color: var(--color-gray-mid);
}

.card__read-time::before {
  content: '·';
  margin-right: 0.75rem;
}

/* Card Title */
.card__title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.35;
  margin-bottom: 0.75rem;
  transition: color var(--transition-fast);
}

.card--dark .card__title {
  color: var(--color-white);
}

.card:hover .card__title {
  color: var(--color-blue);
}

.card--dark:hover .card__title {
  color: var(--color-accent);
}

/* Card Excerpt */
.card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-gray-dark);
  /* gray-mid không đủ tương phản trên nền sáng (~3:1, fail WCAG AA) */
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card--dark .card__excerpt {
  color: rgba(255, 255, 255, 0.6);
}

/* Card Footer */
.card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--color-gray-light);
}

.card--dark .card__footer {
  border-color: rgba(255, 255, 255, 0.08);
}

/* Read more arrow */
.card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-blue);
  transition: gap var(--transition-base), color var(--transition-fast);
}

.card--dark .card__link {
  color: var(--color-accent);
}

.card:hover .card__link {
  gap: 0.625rem;
}

/* Featured card variant */
.card--featured .card__title {
  font-size: var(--text-h3);
}

.card--featured .card__excerpt {
  -webkit-line-clamp: 4;
  font-size: var(--text-body);
}

/* Pillar card variant (dùng chung — trước đây chỉ khai báo local trong index.html, khiến
   about.html phải tự chế inline style để dùng lại đúng class này) */
.pillar-card {
  text-align: center;
  padding: 2.5rem 2rem;
}

.pillar-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  border: 0.5px solid rgba(var(--color-accent-alt-rgb), 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-style: italic;
  color: var(--color-accent);
}

.pillar-card__title {
  font-size: var(--text-h4);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}

.pillar-card__sub {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.875rem;
}

.pillar-card__desc {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.58);
  line-height: 1.7;
}

/* Service card variant */
.card--service {
  padding: 2.25rem;
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
}

.card--service::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.card--service:hover::before {
  transform: scaleX(1);
}

.card__service-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-navy), var(--color-navy-mid));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card--service:hover .card__service-icon {
  transform: scale(1.1);
  box-shadow: var(--shadow-accent);
}

.card__service-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-accent);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

.card__service-number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  color: rgba(var(--color-navy-rgb), 0.8);
  /* đậm hơn để không bị chìm nền */
  line-height: 1;
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  transition: color var(--transition-base);
}

.card--dark .card__service-number {
  color: rgba(255, 255, 255, 0.9);
  /* đậm hơn để không bị chìm nền */
}

.card--service:hover .card__service-number {
  color: var(--color-accent);
  /* Chuyển hẳn sang màu Gold rõ nét khi di chuột */
}

/* ============================================================
   TAGS / BADGES
   ============================================================ */
.tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-label);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.tag--blue {
  background: rgba(21, 101, 192, 0.1);
  color: var(--color-blue);
}

.tag--accent {
  background: rgba(10, 102, 194, 0.12);
  color: var(--color-accent-dark);
}

.tag--navy {
  background: var(--color-navy);
  color: var(--color-accent);
}

.tag--green {
  background: rgba(0, 137, 123, 0.1);
  color: var(--color-success);
}

.tag--light {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.8);
}

.tag:hover {
  transform: translateY(-1px);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background-color: var(--color-navy);
  color: rgba(255, 255, 255, 0.7);
  padding-top: 5rem;
  padding-bottom: 2rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 2.5rem;
}

.footer__brand-name {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.25rem;
}

.footer__brand-title {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

.footer__brand-desc {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 1.5rem;
  max-width: 355px;
  text-align: justify;
  hyphens: auto;
}

/* Social links */
.footer__socials {
  display: flex;
  gap: 0.75rem;
}

.footer__social-link {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  transition: all var(--transition-base);
}

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

.footer__social-link svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* Thêm đoạn này vào để sửa lỗi icon hình chữ nhật đặc */
.footer__social-link svg[fill="none"] {
  fill: none;
}

/* Footer nav columns */
.footer__col-title {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 1.25rem;
}

.footer__nav {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer__nav-link {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer__nav-link:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

/* Footer bottom */
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer__copyright {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.35);
}

.footer__copyright a {
  color: var(--color-accent);
  transition: opacity var(--transition-fast);
}

.footer__copyright a:hover {
  opacity: 0.8;
}

/* ============================================================
   CONTACT FORM
   ============================================================ */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: 0.5rem;
  letter-spacing: 0.03em;
}

.form-label--white {
  color: rgba(255, 255, 255, 0.9);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.875rem 1.125rem;
  background: var(--color-white);
  border: 1.5px solid var(--color-gray-light);
  border-radius: var(--radius-sm);
  font-size: var(--text-body);
  color: var(--color-navy);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(10, 102, 194, 0.12);
  outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-gray-mid);
}

.form-textarea {
  resize: vertical;
  min-height: 130px;
}

/* Dark form variant */
.form-input--dark,
.form-textarea--dark {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  color: var(--color-white);
}

.form-input--dark::placeholder,
.form-textarea--dark::placeholder {
  color: rgba(255, 255, 255, 0.35);
}

.form-input--dark:focus,
.form-textarea--dark:focus {
  border-color: var(--color-accent);
  background: rgba(255, 255, 255, 0.08);
}

/* ============================================================
   NEWSLETTER BAR
   ============================================================ */
.newsletter {
  background: linear-gradient(135deg, var(--color-navy-mid), var(--color-navy));
  border: 1px solid rgba(10, 102, 194, 0.2);
  border-radius: var(--radius-lg);
  padding: 3rem;
  text-align: center;
}

.newsletter .section-label {
  color: rgba(255, 255, 255, 0.7);
}

.newsletter__title {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.newsletter__subtitle {
  font-size: var(--text-body);
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 2rem;
}

.newsletter__form {
  display: flex;
  gap: 0.75rem;
  max-width: 480px;
  margin: 0 auto;
}

.newsletter__form .form-input {
  flex: 1;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--color-white);
}

.newsletter__form .form-input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.newsletter__form .form-input:focus {
  border-color: var(--color-accent);
}

/* ============================================================
   JOURNEY TIMELINE
   ============================================================ */
.timeline {
  position: relative;
  padding-left: 2.5rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-navy-light));
}

.timeline__item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: -2.875rem;
  top: 0.25rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-navy);
  box-shadow: 0 0 0 3px rgba(10, 102, 194, 0.25);
}

.timeline__dot--active {
  background: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(10, 102, 194, 0.35), 0 0 15px rgba(10, 102, 194, 0.4);
}

.timeline__date {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.375rem;
}

.timeline__title {
  font-size: var(--text-body);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 0.375rem;
}

.timeline__desc {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.6;
}

/* ============================================================
   SCROLL TO TOP
   ============================================================ */
.scroll-top {
  position: fixed;
  bottom: 100px;
  right: 24px;
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  color: var(--color-navy);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 50;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  box-shadow: var(--shadow-accent);
}

.scroll-top--visible {
  opacity: 1;
  transform: translateY(0);
}

.scroll-top:hover {
  background: var(--color-accent-light);
  transform: translateY(-3px);
}

/* ============================================================
   RESPONSIVE COMPONENTS
   ============================================================ */
@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }

  .footer__brand-desc {
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .nav__menu {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .newsletter {
    padding: 2rem 1.5rem;
  }

  .newsletter__form {
    flex-direction: column;
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ============================================================
   INSIGHT CARD THUMBNAILS (gradient placeholder, không dùng ảnh/khuôn mặt)
   ============================================================ */
.thumb-finance {
  background: linear-gradient(135deg, var(--color-navy), var(--color-blue));
}

.thumb-tax {
  background: linear-gradient(135deg, var(--color-navy), var(--color-success));
}

.thumb-ai {
  background: linear-gradient(135deg, var(--color-navy-mid), var(--color-blue-bright));
}

.thumb-realestate {
  background: linear-gradient(135deg, var(--color-navy-light), var(--color-accent));
}

.thumb-icon {
  font-size: 2.5rem;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.25));
}

/* ============================================================
   ARTICLE BODY (Insights — trang chi tiết bài viết)
   ============================================================ */
.article-body h2 {
  margin-top: 3rem;
  margin-bottom: 1rem;
}

.article-body h3 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.article-body p {
  margin-bottom: 1.25rem;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.25rem 1.5rem;
}

.article-body ul {
  list-style: disc;
}

.article-body ol {
  list-style: decimal;
}

.article-body li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
  color: var(--color-gray-dark);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0 2rem;
  font-size: var(--text-sm);
}

.article-body th,
.article-body td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-gray-light);
  text-align: left;
  vertical-align: top;
}

.article-body th {
  background: var(--color-navy);
  color: var(--color-white);
  font-weight: 600;
}

.article-body tr:nth-child(even) td {
  background: var(--color-off-white);
}

.article-body table {
  overflow-x: auto;
  display: block;
}

.article-body table thead,
.article-body table tbody {
  display: table;
  width: 100%;
  table-layout: fixed;
}

.article-body blockquote {
  border-left: 3px solid var(--color-accent);
  background: var(--color-off-white);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--color-gray-dark);
}

.article-body .callout {
  border: 1px solid rgba(10, 102, 194, 0.3);
  background: rgba(10, 102, 194, 0.06);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}

.article-body .callout strong {
  color: var(--color-navy);
}

.related-links {
  border-top: 1px solid var(--color-gray-light);
  padding-top: 1.75rem;
}

.related-links h2 {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray-mid);
  margin-bottom: 1rem;
}

.related-links ul {
  list-style: disc;
  margin-left: 1.25rem;
}

.related-links li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.related-links a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: transparent;
  transition: text-decoration-color var(--transition-fast);
}

.related-links a:hover {
  text-decoration-color: var(--color-accent);
}

.article-hero {
  padding-top: 8rem;
  padding-bottom: 3rem;
}

.article-hero .card__meta {
  margin-top: 1.25rem;
}

.article-hero .card__date,
.article-hero .card__read-time {
  color: rgba(255, 255, 255, 0.55);
}

/* ============================================================
   INSIGHTS — TABS, FILTER PILLS, EMPTY STATE (UI scale tới hàng trăm bài)
   ============================================================ */
.tabs {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.tab-btn {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.6);
  background: transparent;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--color-white);
  border-color: rgba(10, 102, 194, 0.5);
}

.tab-btn--active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-navy);
}

.tab-btn--active:hover {
  color: var(--color-navy);
}

.insights-panel {
  display: none;
}

.insights-panel--active {
  display: block;
}

.filter-pills {
  display: flex;
  gap: 0.625rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.filter-pill {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-gray-light);
  color: var(--color-gray-mid);
  background: var(--color-white);
  transition: all var(--transition-fast);
}

.filter-pill:hover {
  border-color: rgba(10, 102, 194, 0.4);
  color: var(--color-navy);
}

.filter-pill--active {
  background: var(--color-navy);
  border-color: var(--color-navy);
  color: var(--color-accent);
}

.insights-empty {
  text-align: center;
  padding: 4rem 1.5rem;
  border: 1px dashed rgba(10, 102, 194, 0.35);
  border-radius: var(--radius-lg);
  background: rgba(10, 102, 194, 0.04);
}

.insights-empty__icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.insights-empty h3 {
  margin-bottom: 0.75rem;
}

.insights-empty p {
  color: var(--color-gray-mid);
  max-width: 480px;
  margin: 0 auto;
}

/* Phân trang số (1, 2, 3...) — thay cho "Xem thêm" để trang không kéo dài vô hạn */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 3rem;
}

.pagination__btn {
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 0.5rem;
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-md);
  background: var(--color-white);
  color: var(--color-gray-dark);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.pagination__btn:hover:not([disabled]):not(.pagination__btn--active) {
  border-color: rgba(10, 102, 194, 0.5);
  color: var(--color-navy);
}

.pagination__btn--active {
  background: var(--color-navy);
  border-color: var(--color-navy);
  color: var(--color-accent);
  cursor: default;
}

.pagination__btn[disabled] {
  opacity: 0.35;
  cursor: not-allowed;
}

.pagination__ellipsis {
  color: var(--color-gray-mid);
  font-weight: 600;
  padding: 0 0.25rem;
}