/* =========================================================
   Meii AI – Explainers Page
   Design system: warm-neutral surface, single confident blue accent,
   Poppins for display moments, Inter for everything functional.
   Sidebar uses a hard-shadow "stacked card" list style.
   ========================================================= */

:root {
  /* Ink */
  --color-text-primary: #16171d;
  --color-text-secondary: #5b6270;
  --color-text-muted: #8a8f98;

  /* Surfaces */
  --color-white: #ffffff;
  --color-surface: #fafafb;
  --color-card-bg: #f2f2f2;
  --color-border: #e6e8eb;
  --color-border-strong: #d7dae0;

  /* Brand accent */
  --color-blue: #2f5eff;
  --color-blue-dark: #1e46d6;
  --color-blue-tint: #eef2ff;
  --meii-blue: #2f5eff;
  --meii-blue-link: #2f5eff;

  /* Footer */
  --color-footer-bg: #fbe8dc;
  --color-footer-heading: #e8794a;
  --color-footer-btn: #35363c;

  --font-body: 'Poppins', -apple-system, 'Segoe UI', Arial, sans-serif;

  --header-height: 72px;
  --shadow-card: 0 1px 2px rgba(18, 19, 26, 0.04);
  --shadow-card-hover: 0 16px 32px -12px rgba(47, 94, 255, 0.22);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-body);
  color: var(--color-text-primary);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  text-decoration: none;
}

::selection {
  background: var(--color-blue);
  color: var(--color-white);
}

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

/* =========================================================
   HEADER / NAVBAR
   ========================================================= */

.custom-navbar {
  background: var(--color-white);
  height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 999;
}

.custom-navbar .container {
  max-width: 1280px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.navbar-brand img {
  width: 112px;
  height: 30px;
  object-fit: contain;
}

.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0;
}

.navbar-collapse {
  justify-content: center;
}

.navbar-nav {
  gap: 15px;
}

.navbar-nav .nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 0 14px;
  line-height: var(--header-height);
  transition: color 0.2s var(--ease);
}

.navbar-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 22px;
  height: 2px;
  background: var(--color-blue);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s var(--ease);
}

.navbar-nav .nav-link:hover {
  color: var(--color-text-primary);
}

.navbar-nav .nav-link:hover::after {
  transform: scaleX(1);
}

.navbar-nav .nav-link.active {
  color: var(--color-text-primary);
}

.navbar-nav .nav-link.active::after {
  transform: scaleX(1);
}

.dropdown-toggle::after {
  border: none;
  content: "⌄";
  font-size: 13px;
  margin-left: 5px;
  vertical-align: middle;
  color: var(--color-text-muted);
}

.dropdown-menu {
  margin-top: 12px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  box-shadow: 0 20px 40px -8px rgba(18, 19, 26, 0.14);
  padding: 8px;
  min-width: 240px;
}

.dropdown-item {
  font-size: 15px;
  font-weight: 500;
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--color-text-secondary);
  transition: background 0.15s var(--ease), color 0.15s var(--ease);
}

.dropdown-item:hover {
  background: var(--color-blue-tint);
  color: var(--color-blue-dark);
}

.nav-btn {
  background: var(--color-blue);
  color: var(--color-white);
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s var(--ease), transform 0.15s var(--ease);
}

.nav-btn:hover {
  background: var(--color-blue-dark);
  color: var(--color-white);
  transform: translateY(-1px);
}

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

.navbar-toggler {
  border: none;
  box-shadow: none !important;
}

.navbar-toggler:focus {
  box-shadow: none;
}


/* =========================================================
   HERO SECTION
   ========================================================= */

.hero-section {
  padding: 4.5rem 0 5rem;
  text-align: center;
  background-color: var(--color-white);
}

.hero-section h1, .hero-section h2, .hero-section h3, .hero-section h4 {
  font-weight: 300;
  font-size: 4rem;
  color: var(--color-text-primary);
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero-section p {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-primary);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
}

/* =========================================================
   MAIN CONTENT LAYOUT
   ========================================================= */

.main-content {
  padding-bottom: 4rem;
}

/* =========================================================
   SIDEBAR — hard-shadow stacked list
   ========================================================= */

/* Sidebar Navigation */
.sidebar-nav {
    list-style: none;
    padding: 0;
    margin: 0;
    border-left: 1px solid #d9d9d9;
}

/* Each item */
.sidebar-item {
    position: relative;
}

/* Bootstrap button */
.sidebar-link {
    display: block;
    width: 100%;
    padding: 12px 18px;
    text-align: left;
    background: transparent;
    border: none;
    color: #525252;
    font-size: 14px;
    font-weight: 400;
    line-height: 1.4;
    cursor: pointer;
    transition: all .2s ease;
}

/* Remove Bootstrap focus */
.sidebar-link:focus,
.sidebar-link:focus-visible {
    outline: none;
    box-shadow: none;
}

/* Hover */
.sidebar-link:hover {
    color: #161616;
    background: transparent;
}

/* Active Tab */
.sidebar-link.active {
    color: #161616;
    font-weight: 500;
    background: transparent;
}

/* Blue indicator */
.sidebar-link.active::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 0;
    width: 3px;
    height: 100%;
    background: #0f62fe;
}

/* =========================================================
   FEATURED TOPICS / RIGHT CONTENT
   ========================================================= */

.topics-section {
  margin-bottom: 3.5rem;
}

.topics-section:last-child {
  margin-bottom: 0;
}

.topics-heading {
  font-size: 1.9rem;
  color: var(--color-text-primary);
  margin-bottom: 0.865rem;
}

.topics-subtitle {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  max-width: 480px;
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

/* =========================================================
   TOPIC CARDS
   ========================================================= */

.topic-card {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
  text-decoration: none;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition:
    box-shadow 0.2s var(--ease),
    transform 0.2s var(--ease),
    border-color 0.2s var(--ease),
    background-color 0.2s var(--ease);
}

.topic-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--color-blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}

.topic-card:hover {
  background-color: var(--color-white);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}

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

.topic-card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.4;
}

.topic-card-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin-top: auto;
}

.topic-card-arrow {
  width: 20px;
  height: 20px;
  color: var(--color-blue);
  flex-shrink: 0;
  transition: transform 0.2s var(--ease);
}

.topic-card:hover .topic-card-arrow {
  transform: translateX(4px);
}

/* =========================================================
   FOOTER
   ========================================================= */

.foot-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding-left: 0px;
}

.foot-links li {
  margin-bottom: 0;
}

.foot-links a {
  font-size: 14px;
  color: #000000;
  transition: color .2s;
}

.foot-links a:hover {
  color: #ff3d00;
}

.site-footer{
    background:#f7e7df;
    padding:60px 0 20px;
}

.footer-logo{
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:22px;
}

.footer-logo img{
    width:112px;
    height:30px;
}

.footer-logo span{
    font-size:22px;
    font-weight:600;
    color:#111;
}

.footer-description{
    max-width:290px;
    font-size:15px;
    line-height:1.7;
    color:#111;
    font-weight:400;
    margin-bottom:20px;
}

.footer-social{
    display:flex;
    gap:10px;
    margin-top:10px;
}

.footer-social-btn{
    background:#60595d;
    color:#fff;
    border:none;
    border-radius:6px;
    padding:9px 16px;
    font-size:14px;
    font-weight:500;
    transition:.2s;
}

.footer-social-btn:hover{
    background:#444;
}

.footer-heading{
    color:#ff5c1a;
    text-transform:uppercase;
    font-size:16px;
    font-weight:700;
    margin-bottom:18px;
    letter-spacing:.5px;
}

.footer-links{
    list-style:none;
    padding:0;
    margin:0;
}

.footer-links li{
    margin-bottom:14px;
}

.footer-links a{
    color:#111;
    font-size:16px;
    font-weight:400;
    text-decoration:none;
}

.footer-links a:hover{
    color:#ff5c1a;
}

.footer-offices{
    list-style:none;
    padding:0;
    margin:0;
}

.footer-offices li{
    display:flex;
    gap:12px;
    margin-bottom:18px;
    font-size:15px;
    line-height:1.45;
    color:#111;
}

.country-code{
    min-width:22px;
    color:#111;
    font-size:11px;
    font-weight:700;
    text-transform:uppercase;
    margin-top:2px;
}

.footer-copyright{
    margin-top:35px;
    padding-top:20px;
    border-top:none;
    color:#111;
    font-size:15px;
}

/* =========================================================
   RESPONSIVE ADJUSTMENTS
   ========================================================= */

@media (max-width: 991.98px) {
  .hero-title {
    font-size: 3rem;
  }

  .sidebar-nav {
    border-bottom: none;
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 12px;
    padding: 4px 4px 1rem 4px;
    margin-bottom: 2rem;
  }

  .sidebar-nav .sidebar-link {
    white-space: nowrap;
  }

  .topic-card {
    height: 200px;
  }
}
@media (max-width: 991.98px) {
  .custom-navbar {
    height: auto;
    padding: 12px 0;
  }

  .navbar-collapse {
    background: var(--color-white);
    margin-top: 15px;
    padding: 10px 0;
  }

  .navbar-nav {
    gap: 0;
  }

  .navbar-nav .nav-link {
    line-height: 1.5;
    padding: 12px 4px;
  }

  .navbar-nav .nav-link::after {
    left: 4px;
    right: 4px;
    bottom: 6px;
  }

  .nav-btn {
    display: block;
    margin: 15px 0 5px;
    text-align: center;
  }
}


@media (max-width: 767.98px) {
  .hero-section h1,
  .hero-section h2,
  .hero-section h3,
  .hero-section h4 {
    font-size: 2.25rem;
  }

  .hero-section p {
    font-size: 1rem;
  }

  .main-nav {
    gap: 1.25rem;
  }

  .topics-heading {
    font-size: 1.6rem;
  }

  .footer-description {
    max-width: 100%;
  }
}

@media (max-width: 575.98px) {
  .brand-name {
    font-size: 1.15rem;
  }

  .hero-section {
    padding: 3rem 0 2.5rem;
  }

  .topic-card {
    height: auto;
    min-height: 180px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
  }
}

/* ===== HEADER ===== */
.site-header{
 
  background:#fff;
}
.logo-img{ height:34px; width:auto; }
.brand-name{
  font-weight:600;
  font-size:1.4rem;
  color:#1a1a1a;
  margin-left:.5rem;
}
.site-header .nav-link{
  color:#333;
  font-weight:500;
  font-size:.98rem;
  padding:.5rem 1rem;
}
.site-header .nav-link:hover{ color:var(--meii-blue); }
.site-header .dropdown-toggle::after{ vertical-align:.15em; }

/* ===== BREADCRUMB / HERO ===== */
.breadcrumb-bar{ font-size:.9rem; color:#666; justify-content:center; display:flex; gap:.3rem; margin-bottom:1.5rem;}
.breadcrumb-bar a{ color:var(--meii-blue-link); }
.page-title{
  font-weight:600;
  font-size:2.75rem;
  margin:.4rem 0 1.75rem;
  color:#1a1a1a;justify-content:center; display:flex; gap:.3rem; margin-bottom:1.5rem;
}
.hero-figure{
  width:100%;
  max-height:420px;
  overflow:hidden;
  border-radius:2px;
}
.hero-figure img{
  width:100%;
  height:420px;
  object-fit:cover;
  display:block;
}

/* ===== SIDE NAV (blue accent) ===== */
.toc-nav{
  position:sticky;
  top:1.5rem;
  padding-left: 2px;
}

.toc-nav .nav-link{
  position: relative;
  color:#555;
  font-size:.95rem;
  padding:.7rem .25rem .7rem .9rem;
  border-radius:0;
}
.toc-nav .nav-link.active{
  color:#111;
  font-weight:600;
  border-left:3px solid var(--meii-blue);
  padding-left:.6rem;
}
.toc-nav::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:2px;
  background:#d9d9d9;
}

.toc-nav .nav-link:hover{ color:var(--meii-blue); }

.toc-nav br {
  display: none;
}
/* ===== ARTICLE CONTENT ===== */
.article-body h2{
  font-weight:400;
  font-size:2rem;
  margin-top:2.75rem;
  margin-bottom:1.25rem;
}
.article-body h3{
  font-weight:400;
  font-size:1.5rem;
  margin-top:1.75rem;
  margin-bottom:1rem;
}
.article-body p, .article-body ul, .article-body ol{
  font-size:1.02rem;
  line-height:1.75;
  color:#333;
  margin-bottom:1.1rem;
}
.article-body a{ color:var(--meii-blue-link); }
.article-body strong{ color:#111; }

.author-box{
  display:flex;
  align-items:center;
  gap:.9rem;
  margin-top:2.5rem;
  padding-top:2rem;
  border-top:1px solid #eee;
}
.author-avatar{
  width:52px;height:52px;border-radius:50%;
  object-fit:cover;
  background:#ddd;
}
.author-name{ color:var(--meii-blue-link); font-weight:600; font-size:.98rem; }
.author-role{ font-size:.85rem; color:#666; }

@media (max-width: 991.98px){
  .toc-nav{ position:static; margin-bottom:2rem; }
  .page-title{ font-size:2.1rem; }
  .hero-figure img{ height:260px; }
}
@media (max-width: 575.98px){
  .brand-name{ font-size:1.15rem; }
  .page-title{ font-size:1.7rem; }
}

.quick-answer table {
  margin: 0;
  background-color: #f8f9fa;
}

.quick-answer table tbody tr:hover {
  background-color: unset;
}

/* ================================
   Glossary Accordion
================================ */

.glossary-accordion {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
}

/* Accordion Item */
.glossary-accordion .accordion-item {
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  margin-bottom: 16px;
}

/* Remove Bootstrap default border */
.glossary-accordion .accordion-item,
.glossary-accordion .accordion-button {
  box-shadow: none;
}

/* Question */
.glossary-accordion .accordion-button {
  position: relative;
  padding: 20px 55px 20px 22px;
  background: #fff;
  color: #1f2937;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.5;
  border: 0;
  box-shadow: none;
}

.glossary-accordion h2 {
  margin: 0;
  font-size: unset;
  font-weight: unset;
}

/* Hover */
.glossary-accordion .accordion-button:hover {
  background: #f8fafc;
}

/* Active Question */
.glossary-accordion .accordion-button:not(.collapsed) {
  background: #f8fafc;
  color: #111827;
  box-shadow: none;
}

/* Bootstrap default focus */
.glossary-accordion .accordion-button:focus {
  border-color: transparent;
  box-shadow: none;
}

/* Arrow */
.glossary-accordion .accordion-button::after {
  width: 14px;
  height: 14px;
  background-size: 14px;
  transition: transform 0.25s ease;
}

/* Answer */
.glossary-accordion .accordion-body {
  color: #5f6368;
  font-size: 16px;
  line-height: 1.75;
  border-top: 1px solid #f0f1f3;
}

/* Answer content */
.glossary-accordion .accordion-body p {
  margin-bottom: 12px;
}

.glossary-accordion .accordion-body p:last-child {
  margin-bottom: 0;
}

.glossary-accordion .accordion-body ul,
.glossary-accordion .accordion-body ol {
  padding-left: 22px;
  margin-bottom: 12px;
}

.glossary-accordion .accordion-body li {
  margin-bottom: 6px;
}

@media (max-width: 991.98px) {

  .glossary-accordion {
    max-width: 100%;
  }

  .glossary-accordion .accordion-button {
    padding: 18px 50px 18px 20px;
    font-size: 16px;
  }

  .glossary-accordion .accordion-body {
    padding: 0 20px 20px;
    font-size: 15px;
    line-height: 1.7;
  }

}

/* ================================
   Mobile
================================ */

@media (max-width: 575.98px) {

  .glossary-accordion .accordion-item {
    border-radius: 10px;
    margin-bottom: 12px;
  }

  .glossary-accordion .accordion-button {
    padding: 16px 45px 16px 16px;
    font-size: 15px;
    line-height: 1.45;
  }

  .glossary-accordion .accordion-button::after {
    width: 12px;
    height: 12px;
    background-size: 12px;
  }

  .glossary-accordion .accordion-body {
    padding: 0 16px 18px;
    font-size: 14px;
    line-height: 1.65;
  }

  .glossary-accordion .accordion-body ul,
  .glossary-accordion .accordion-body ol {
    padding-left: 18px;
  }
}


/* Table Styling */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-family: Arial, sans-serif;
  font-size: 16px;
}

table thead {
  background-color: #2c3e50;
  color: #ffffff;
}

table th,
table td {
  padding: 14px 16px;
  border: 1px solid #ddd;
  text-align: left;
  vertical-align: top;
}

table tbody tr:nth-child(even) {
  background-color: #f8f9fa;
}

table tbody tr:hover {
  background-color: #eef4ff;
}

table th {
  font-weight: 600;
}

@media (max-width: 768px) {
  table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}

/* =========================
   Lists
========================= */

ul,
ol {
  margin: 20px 0;
  padding-left: 25px;
}

ul li,
ol li {
  margin-bottom: 10px;
  line-height: 1.7;
  color: #333;
}

/* Unordered List */
ul {
  list-style-type: disc;
}

ul ul {
  margin-top: 8px;
  margin-bottom: 8px;
  list-style-type: circle;
}

/* Ordered List */
ol {
  list-style-type: decimal;
}

ol ol {
  margin-top: 8px;
  margin-bottom: 8px;
  list-style-type: lower-alpha;
}

/* Nested List */
ul li ul,
ol li ol {
  margin-bottom: 0;
}

/* Links inside lists */
ul li a,
ol li a {
  color: #2563eb;
  text-decoration: none;
}

ul li a:hover,
ol li a:hover {
  text-decoration: underline;
}