:root {
  --bg: #E9ECEF;
  --bg-2: #F8F9FA;
  --bg-3: #E9ECEF;
  --text: #212529;
  --text-2: #495057;
  --muted: #6C757D;
  --muted-2: #ADB5BD;
  --brand: #0A2463;
  --brand-2: #3D5A80;
  --brand-3: #98C1D9;
  --accent: #3D5A80;
  --accent-2: #98C1D9;
  --success: #198754;
  --warning: #ffc107;
  --error: #dc3545;
  --card: #FFFFFF;
  --card-2: #F8F9FA;
  --card-hover: #F1F3F5;
  --stroke: #DEE2E6;
  --stroke-2: #CED4DA;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 25px 50px rgba(0, 0, 0, 0.12);
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --max: 1400px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* General & Typography */
body {
  font-family: 'Inter', ui-sans-serif, -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica, Arial;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background: var(--bg-2);
  /*  background: var(--bg); */
  color: var(--text-2);
  overflow-x: hidden;
  line-height: 1.7;
  scroll-behavior: smooth;
}

::selection {
  background: rgba(10, 36, 99, 0.3);
  color: var(--text);
}

a {
  color: var(--brand);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--brand-2);
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px;
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 249, 250, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--stroke);
  transition: var(--transition);
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand-3), transparent);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

.logo {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  box-shadow: 0 8px 25px rgba(10, 36, 99, 0.25);
  font-size: 1.5rem;
  color: white;
}

.nav ul {
  display: flex;
  gap: 8px;
  list-style: none;
}

.nav a {
  padding: 12px 20px;
  border-radius: 12px;
  color: var(--muted);
  font-weight: 800;
  font-size: 1.1rem;
  transition: var(--transition);
  position: relative;
}

.nav a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--brand);
  transform: translateX(-50%);
  transition: var(--transition);
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--text);
  background: var(--card-hover);
}

.nav a:hover::before {
  width: 60%;
}

.menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 28px;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: var(--transition);
}

.menu-btn:hover {
  background: var(--card-hover);
}

/* Hero Section */
.hero {
  padding: auto 0;
  /* 기존 100px → auto */
  text-align: center;
  position: relative;
  background: var(--bg-2);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.0rem;
  letter-spacing: 0.5px;
  color: var(--brand);
  /* background: rgba(10, 36, 99, 0.1); */
  background: rgba(10, 36, 99, 0.02);
  border: 1px solid rgba(10, 36, 99, 0.2);
  border-radius: 50px;
  padding: 10px 20px;
  font-weight: 500;
}

.title {
  font-weight: 800;
  font-size: clamp(3rem, 7vw, 5rem);
  line-height: 1.1;
  margin: 32px 0 24px;
  letter-spacing: -0.03em;
  color: var(--text);
}

.title span {
  background: linear-gradient(135deg, var(--brand), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  font-size: 1.25rem;
  color: var(--muted);
  max-width: 800px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.cta {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  border-radius: 16px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.6s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--accent));
  border-color: var(--brand);
  box-shadow: 0 8px 25px rgba(10, 36, 99, 0.3);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(10, 36, 99, 0.4);
}

.btn:not(.btn-primary) {
  background: var(--card);
  border: 1px solid var(--stroke);
  color: var(--text);
}

.btn:not(.btn-primary):hover {
  transform: translateY(-3px);
  background: var(--card-hover);
  box-shadow: var(--shadow);
}

.trust {
  margin-top: 50px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  color: var(--muted-2);
  font-size: 0.9rem;
}

.viz {
  margin-top: 50px;
  display: grid;
  place-items: center;
}

.panel {
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 40px;
  max-width: 700px;
  width: 100%;
  position: relative;
}

.panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand-3), transparent);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chip {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  border-radius: 14px;
  background: var(--bg-2);
  border: 1px solid var(--stroke);
  font-size: 0.95rem;
  color: var(--text-2);
  transition: var(--transition);
}

.chip:hover {
  background: var(--card-hover);
  transform: translateX(8px);
}

/* Sections */
section {
  padding: 60px 0;
  scroll-margin-top: 100px;
  position: relative;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 60px;
  gap: 40px;
}

.section-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.02em;
  color: var(--text);
}

.section-sub {
  color: var(--muted);
  font-size: 1.25rem;
  margin-top: 12px;
  line-height: 1.6;
}

/* Grid & Cards */
.grid {
  display: grid;
  gap: 32px;
}

.grid.cols-2 {
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}

.grid.cols-3 {
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

/* ===== xTUN 주요 기능 - 4열 그리드 (추가) ===== */
.grid.cols-4 {
  /* 4열을 기본으로 하되 각 열 최소 너비를 지정 */
  grid-template-columns: repeat(4, minmax(200px, 1fr));
  gap: 32px;
}

/* 반응형: 화면 폭이 줄어들면 열 수를 줄임 */
@media (max-width: 1400px) {
  .grid.cols-4 {
    grid-template-columns: repeat(3, minmax(200px, 1fr));
  }
}

@media (max-width: 980px) {
  .grid.cols-4 {
    grid-template-columns: repeat(2, minmax(220px, 1fr));
  }
}

@media (max-width: 768px) {
  .grid.cols-4 {
    grid-template-columns: 1fr;
  }
}

/* ===== end cols-4 ===== */

.card {
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  padding: 40px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--stroke-2);
}

.card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 20px 0 16px;
  color: var(--text);
  position: relative;
  z-index: 1;
}

.badge {
  display: inline-grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  font-size: 2rem;
  box-shadow: 0 8px 25px rgba(10, 36, 99, 0.25);
  position: relative;
  z-index: 1;
  color: white;
}

.feature p {
  color: var(--muted);
  margin: 8px 0 0;
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.meta {
  position: relative;
  z-index: 1;
}

/* xTUN Case Studies */
.xTUN_case {
  background: var(--bg-2);
  position: relative;
}

.xTUN_case .container {
  position: relative;
  z-index: 1;
}

.xTUN_case h2 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  text-align: left;
  margin-bottom: 5px;
  letter-spacing: -0.02em;
  color: var(--text);
}

.cases {
  display: grid;
  gap: 40px;
}

.case {
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  padding: 48px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.case::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand), var(--accent));
}

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

.case h3 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 32px;
  line-height: 1.3;
}

.case-content h4 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--brand);
  margin: 32px 0 16px 0;
}

.case-content h4:first-child {
  margin-top: 0;
}

.case-content ul {
  margin: 16px 0 16px 24px;
  color: var(--muted);
}

.case-content li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.case-content p {
  color: var(--muted);
  margin: 12px 0;
  line-height: 1.7;
}

/* Gallery */
.gallery {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.gallery .item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--stroke);
  background: var(--card-2);
  cursor: pointer;
  transition: var(--transition);
  aspect-ratio: 16/10;
  max-width: 250px;
  margin: 0 auto;
}

.gallery .item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: var(--transition);
}

.gallery .item:hover img {
  transform: scale(1.05);
}

.gallery .cap {
  position: absolute;
  inset: auto 0 0 0;
  padding: 12px;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.6));
  font-size: 0.8rem;
  color: #f8f9fa;
  font-weight: 500;
  z-index: 2;
}


/* Contact Form */
.form {
  max-width: 800px;
  margin: 0 auto;
  background: var(--card);
  padding: 48px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--stroke);
}

.field {
  margin-bottom: 28px;
}

.label {
  display: block;
  margin: 0 0 12px;
  color: var(--text);
  font-weight: 600;
  font-size: 1rem;
}

.input,
.select,
.textarea {
  width: 100%;
  padding: 18px 20px;
  border-radius: 12px;
  background: var(--bg-2);
  color: var(--text);
  border: 1px solid var(--stroke);
  outline: none;
  transition: var(--transition);
  font-size: 1rem;
  font-family: inherit;
}

.input:focus,
.select:focus,
.textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(10, 36, 99, 0.2);
  background: var(--card-hover);
}

.textarea {
  resize: vertical;
  min-height: 120px;
}

#submitBtn {
  width: 100%;
  margin-top: 20px;
}

.mt-16 {
  margin-top: 16px;
}

/* Footer */
.footer {
  padding: 60px 0 40px;
  color: var(--muted);
  border-top: 1px solid var(--stroke);
  text-align: center;
  background: var(--bg-2);
}

.mt-8 {
  margin-top: 8px;
}

/* Lightbox */
dialog {
  padding: 0;
  border: none;
  background: transparent;
  max-width: 95vw;
  max-height: 95vh;
  border-radius: var(--radius-lg);
  margin: auto;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  inset: auto;
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(10px);
}

dialog[open] {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Year Display */
#year::after {
  content: "2024";
}

/* Responsive */
@media (max-width: 1200px) {
  .container {
    padding: 0 24px;
  }

  .grid.cols-2 {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  }

  .grid.cols-3 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
}

@media (max-width: 980px) {
  .hero {
    text-align: left;
    padding: 80px 0;
  }

  .hero .cta {
    justify-content: flex-start;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .section-head .btn {
    align-self: flex-start;
  }

  .menu-btn {
    display: inline-block;
  }

  .nav ul {
    position: fixed;
    right: 24px;
    top: 100px;
    background: var(--card);
    border: 1px solid var(--stroke);
    padding: 24px;
    border-radius: var(--radius);
    display: none;
    flex-direction: column;
    gap: 8px;
    min-width: 200px;
    box-shadow: var(--shadow-lg);
  }

  .nav ul.open {
    display: flex;
  }

  .nav ul a {
    width: 100%;
    text-align: left;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  section {
    padding: 80px 0;
  }

  .hero {
    padding: 70px 0;
  }

  .section-head {
    margin-bottom: 30px;
  }

  .grid {
    gap: 24px;
  }

  .grid.cols-2,
  .grid.cols-3 {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 32px;
  }

  .case {
    padding: 36px;
  }

  .form {
    padding: 36px;
  }

  .panel {
    padding: 32px;
  }

  .cta {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .nav {
    height: 76px;
  }

  .brand {
    font-size: 1.25rem;
  }

  .logo {
    width: 36px;
    height: 36px;
    font-size: 1.25rem;
  }

  .eyebrow {
    font-size: 0.75rem;
    padding: 8px 16px;
  }

  .chip {
    padding: 16px;
    font-size: 0.9rem;
  }

  .gallery {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
  }

}

/* ===== Highlights Section ===== */
.highlights-section {
  padding: 80px 0;
  background: linear-gradient(180deg, var(--bg-2) 0%, var(--card) 50%, var(--bg-2) 100%);
  position: relative;
}

.highlights-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand-3), transparent);
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}

.highlight-card {
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.highlight-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--accent), var(--brand-3));
  opacity: 0;
  transition: var(--transition);
}

.highlight-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-3);
}

.highlight-card:hover::before {
  opacity: 1;
}

.highlight-icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(10, 36, 99, 0.06), rgba(61, 90, 128, 0.08));
  transition: var(--transition);
}

.highlight-card:hover .highlight-icon {
  transform: scale(1.1);
  background: linear-gradient(135deg, rgba(10, 36, 99, 0.1), rgba(61, 90, 128, 0.14));
}

.highlight-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.highlight-desc {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.6;
}

@media (max-width: 1200px) {
  .highlights-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .highlights-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .highlight-card {
    padding: 28px 18px;
  }
}

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

/* ===== end Highlights ===== */

/* Animation for scroll reveal */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card,
.case {
  animation: fadeInUp 0.6s ease-out;
}

/* Enhanced hover effects */
@media (hover: hover) {
  .card:hover .badge {
    transform: scale(1.1) rotate(5deg);
  }

  .chip:hover {
    box-shadow: 0 4px 15px rgba(10, 36, 99, 0.2);
  }
}

/* Loading states */
.gallery img {
  transition: opacity 0.3s ease;
}

.gallery img[loading="lazy"] {
  opacity: 0;
}

.gallery img.loaded {
  opacity: 1;
}

.logo-img {
  height: 40px;
  width: auto;
}

.xtun-logo-hero {
  max-width: 250px;
  margin-bottom: 24px;
}

.brand strong {
  display: none;
  /* Hide the text */
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: 40px;
  align-items: stretch;
}

.case-study-container {
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-xl);
  padding: 40px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.case-study-container:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-3);
}

.case-title-wrapper {
  text-align: center;
  margin-bottom: 32px;
}

h3.case-title-header {
  display: inline-block;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--brand);
  background: rgba(10, 36, 99, 0.05);
  border: 1px solid rgba(10, 36, 99, 0.1);
  padding: 12px 24px;
  border-radius: 50px;
}

.horizontal-grid,
.env-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.env-card {
  background: var(--bg-2);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}

.env-card:hover {
  transform: translateY(-5px);
  background: var(--card-hover);
}

.env-card h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.env-card p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
  margin: 4px 0;
}

.card-image {
  width: 100%;
  max-width: 120px;
  margin: 0 auto 16px;
  display: block;
}

.case2-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: auto;
}

.expectation-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--bg-2);
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--stroke-2);
}

.expectation-card h4 {
  flex-shrink: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--brand-2);
  margin: 0;
  padding-top: 2px;
}

.expectation-content p {
  font-size: 0.95rem;
  color: var(--text-2);
  line-height: 1.7;
  margin: 0;
}

.full-width-card.expectation-card {
  margin-top: auto;
}

.case-card,
.card.feature {
  height: 100%;
}

.case-card h4 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--brand);
}

.case-card ul {
  list-style: none;
  padding-left: 0;
}

.case-card li,
.case-card p {
  color: var(--text-2);
  line-height: 1.8;
  font-size: 0.95rem;
}

.reference-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 50px;
  margin-top: 40px;
}

.reference-logo {
  max-height: 100px;
  max-width: 200px;
  transition: var(--transition);
}

.reference-logo:hover {
  transform: scale(1.05);
}

dialog#lightbox {
  padding: 0;
  border: none;
  background: transparent;
  max-width: 92vw;
  max-height: 90vh;
  border-radius: 16px;
  margin: auto;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  overflow: visible;
}

dialog#lightbox::backdrop {
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
}

dialog#lightbox .lightbox-content {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

dialog#lightbox .lightbox-img {
  max-width: 88vw;
  max-height: 82vh;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  object-fit: contain;
}

/* Close button — top-right inside */
dialog#lightbox .lightbox-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(8px);
  color: #ffffff;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
  z-index: 10;
}

dialog#lightbox .lightbox-close:hover {
  background: rgba(0, 0, 0, 0.7);
  transform: scale(1.1);
}

/* Prev / Next buttons — inside left/right */
dialog#lightbox .lightbox-prev,
dialog#lightbox .lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  color: #ffffff;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
  z-index: 10;
}

dialog#lightbox .lightbox-prev {
  left: 16px;
}

dialog#lightbox .lightbox-next {
  right: 16px;
}

dialog#lightbox .lightbox-prev:hover,
dialog#lightbox .lightbox-next:hover {
  background: rgba(0, 0, 0, 0.65);
  transform: translateY(-50%) scale(1.1);
}

dialog#lightbox .lightbox-prev:disabled,
dialog#lightbox .lightbox-next:disabled {
  opacity: 0.2;
  cursor: default;
  pointer-events: none;
}

/* Filename — bottom-right small */
dialog#lightbox .lightbox-title-style {
  position: absolute;
  bottom: 10px;
  right: 16px;
  color: rgba(255, 255, 255, 0.45);
  font-size: 11px;
  font-weight: 400;
  font-family: 'Inter', monospace;
  letter-spacing: 0.5px;
  z-index: 10;
}

/* Page counter — bottom-center */
dialog#lightbox .lightbox-counter {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 2px;
  font-family: 'Inter', sans-serif;
  z-index: 10;
}

.features-grid {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 80px;
  overflow-x: auto;
  /* Add scroll for small screens */
}

.feature-item {
  text-align: center;
  flex: 0 1 320px;
}

.feature-item img {
  max-width: 100%;
  margin-bottom: 20px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.feature-item img:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.feature-description {
  font-weight: 600;
  color: var(--text);
  font-size: 1.1rem;
}

.btn {
  justify-content: center;
}

/* Hero Background - Clean White */
.hero-bg {
  --text: #0f172a;
  --muted: #475569;
  --brand: #0d9488;
  background-color: #ffffff;
  position: relative;
  overflow: hidden;
}

/* Elegant Logo Presentation */
.xtun-logo-hero {
  filter: drop-shadow(0 4px 12px rgba(13, 148, 136, 0.2));
  max-width: 220px;
  margin-bottom: 16px;
}

/* ===== Dynamic Hero Split Layout ===== */
.hero-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  min-height: 420px;
}

.hero-left {
  text-align: left;
  padding: 40px 0;
}

.hero-brand-title {
  font-size: clamp(3.5rem, 8vw, 6rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 16px;
  color: var(--text);

}

.hero-subtitle {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 24px;
  color: #0A2463;

}

.hero-desc {
  font-size: 1.05rem;
  color: #0A2463;
  line-height: 1.8;

}

.hero-right {
  display: flex;
  align-items: center;
  justify-content: center;

  position: relative;
}

.hero-geo {
  width: 100%;
  max-width: 550px;
  height: auto;
}



/* Responsive Hero Split */
@media (max-width: 980px) {
  .hero-split {
    grid-template-columns: 1fr;
    gap: 20px;
    min-height: auto;
  }

  .hero-left {
    padding: 20px 0 0;
  }

  .hero-right {
    max-height: 300px;
    order: -1;
  }

  .hero-geo {
    max-width: 400px;
  }
}

@media (max-width: 768px) {
  .hero-right {
    max-height: 250px;
  }

  .hero-geo {
    max-width: 320px;
  }

  .hero-brand-title {
    font-size: 3rem;
  }
}

/* ===== end Dynamic Hero Split ===== */

.section-head-left {
  justify-content: left;
  text-align: left;
}

.form-table {
  width: 100%;
  border-collapse: collapse;
}

.form-label-cell {
  width: 120px;
}

.lightbox-content {
  background: var(--card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--stroke);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow)
}

.lightbox-img {
  display: block;
  width: 100%;
  max-height: 70vh;
  object-fit: contain;
  background: #0a0f1e
}

.lightbox-title-style {
  font-weight: 600
}

.lightbox-nav {
  display: flex;
  gap: 8px;
}

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

#xtun_ai,
#xtun_ai body {
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: #1e293b;
  /* min-height: 100vh; */
  min-height: auto;
  padding: 40px 20px;
  overflow-x: auto;
  position: relative;
}

#xtun_ai::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 25% 25%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

#xtun_ai .container {
  /* max-width: 1800px; */
  margin: 0 auto;
  /* min-width: 1400px; */
}

#xtun_ai .header {
  text-align: center;
  margin-bottom: 60px;
  opacity: 0;
  animation: fadeInUp 1s ease-out 0.3s forwards;
}

#xtun_ai .header h1 {
  font-size: 3.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
  text-shadow: 0 4px 16px rgba(59, 130, 246, 0.2);
  position: relative;
}

#xtun_ai .header h1::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.6), transparent);
  border-radius: 2px;
}

#xtun_ai .header p {
  font-size: 1.1rem;
  color: #64748b;
  font-weight: 400;
}

#xtun_ai .architecture-diagram {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: 60px;
  margin-bottom: 80px;
  opacity: 0;
  animation: fadeInUp 1s ease-out 0.6s forwards;
  position: relative;
}

#xtun_ai .tier {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 20px;
  flex: 1;
  min-height: 600px;
}

#xtun_ai .tier-label {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #ffffff;
  border: 2px solid #e2e8f0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  z-index: 10;
}

/* Enhanced Tier 1 - Client */
#xtun_ai .tier-1 {
  background: linear-gradient(135deg, #fef7ff 0%, #fae8ff 50%, #f3e8ff 100%);
  border: 2px solid;
  border-image: linear-gradient(135deg, #d946ef, #c084fc) 1;
  border-radius: 28px;
  position: relative;
  box-shadow: 0 20px 40px rgba(217, 70, 239, 0.15),
    0 8px 16px rgba(217, 70, 239, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

#xtun_ai .tier-1:hover {
  transform: translateY(-8px);
  box-shadow: 0 32px 64px rgba(217, 70, 239, 0.2),
    0 16px 32px rgba(217, 70, 239, 0.15);
}

/* Enhanced Tier 2 - Application */
#xtun_ai .tier-2 {
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 50%, #bfdbfe 100%);
  border: 2px solid;
  border-image: linear-gradient(135deg, #3b82f6, #60a5fa) 1;
  border-radius: 28px;
  position: relative;
  box-shadow: 0 20px 40px rgba(59, 130, 246, 0.15),
    0 8px 16px rgba(59, 130, 246, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

#xtun_ai .tier-2:hover {
  transform: translateY(-8px);
  box-shadow: 0 32px 64px rgba(59, 130, 246, 0.2),
    0 16px 32px rgba(59, 130, 246, 0.15);
}

/* Enhanced Tier 3 - Data */
#xtun_ai .tier-3 {
  background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 50%, #bbf7d0 100%);
  border: 2px solid;
  border-image: linear-gradient(135deg, #22c55e, #4ade80) 1;
  border-radius: 28px;
  position: relative;
  box-shadow: 0 20px 40px rgba(34, 197, 94, 0.15),
    0 8px 16px rgba(34, 197, 94, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

#xtun_ai .tier-3:hover {
  transform: translateY(-8px);
  box-shadow: 0 32px 64px rgba(34, 197, 94, 0.2),
    0 16px 32px rgba(34, 197, 94, 0.15);
}

#xtun_ai .tier-header {
  text-align: center;
  margin-bottom: 32px;
}

#xtun_ai .tier-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 16px;
  color: #ffffff;
}

#xtun_ai .tier-1 .tier-number {
  background: linear-gradient(135deg, #d946ef, #c084fc);
  box-shadow: 0 12px 32px rgba(217, 70, 239, 0.35),
    0 4px 16px rgba(217, 70, 239, 0.2);
  border: 3px solid rgba(255, 255, 255, 0.3);
}

#xtun_ai .tier-2 .tier-number {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  box-shadow: 0 12px 32px rgba(59, 130, 246, 0.35),
    0 4px 16px rgba(59, 130, 246, 0.2);
  border: 3px solid rgba(255, 255, 255, 0.3);
}

#xtun_ai .tier-3 .tier-number {
  background: linear-gradient(135deg, #22c55e, #15803d);
  box-shadow: 0 12px 32px rgba(34, 197, 94, 0.35),
    0 4px 16px rgba(34, 197, 94, 0.2);
  border: 3px solid rgba(255, 255, 255, 0.3);
}

#xtun_ai .tier-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 8px;
}

#xtun_ai .tier-subtitle {
  font-size: 0.9rem;
  color: #64748b;
  font-weight: 400;
}

#xtun_ai .modules {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
  max-width: 340px;
}

#xtun_ai .module {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.95));
  border: 2px solid rgba(226, 232, 240, 0.8);
  border-radius: 20px;
  padding: 28px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08),
    0 4px 16px rgba(0, 0, 0, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
}

#xtun_ai .module::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.6), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

#xtun_ai .module:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: rgba(59, 130, 246, 0.6);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.15),
    0 12px 24px rgba(59, 130, 246, 0.1);
  background: linear-gradient(135deg, rgba(255, 255, 255, 1), rgba(248, 250, 252, 1));
}

#xtun_ai .module:hover::before {
  opacity: 1;
}

#xtun_ai .module-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

#xtun_ai .module-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: #ffffff;
  border: 3px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
  transition: all 0.3s ease;
}

#xtun_ai .module:hover .module-icon {
  transform: scale(1.1);
  box-shadow: 0 12px 32px rgba(59, 130, 246, 0.35);
}

#xtun_ai .module-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: #1e293b;
}

#xtun_ai .module-features {
  list-style: none;
}

#xtun_ai .module-features li {
  padding: 6px 0;
  color: #475569;
  font-size: 0.9rem;
  position: relative;
  padding-left: 20px;
  line-height: 1.4;
}

#xtun_ai .module-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 4px;
  height: 4px;
  background: #64748b;
  border-radius: 50%;
}

#xtun_ai .llm-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

#xtun_ai .llm-option {
  background: linear-gradient(135deg, #f8fafc, #ffffff);
  border: 2px solid rgba(226, 232, 240, 0.8);
  border-radius: 16px;
  padding: 20px;
  text-align: center;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  position: relative;
  overflow: hidden;
}

#xtun_ai .llm-option::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.6s ease;
}

#xtun_ai .llm-option:hover {
  border-color: rgba(59, 130, 246, 0.6);
  background: linear-gradient(135deg, #ffffff, #f8fafc);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12),
    0 4px 12px rgba(59, 130, 246, 0.15);
  transform: translateY(-4px) scale(1.05);
}

#xtun_ai .llm-option:hover::before {
  left: 100%;
}

#xtun_ai .llm-type {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: #1e293b;
}

#xtun_ai .llm-name {
  font-size: 0.8rem;
  color: #64748b;
}

/* Enhanced Communication Lines */
#xtun_ai .communication-line {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 15;
  opacity: 0;
  animation: fadeIn 1s ease-out 1.5s forwards;
}

#xtun_ai .line-1-to-2 {
  left: calc(33.33% - 40px);
  width: 80px;
}

#xtun_ai .line-2-to-3 {
  left: calc(66.66% - 40px);
  width: 80px;
}

#xtun_ai .comm-line {
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg,
      rgba(99, 102, 241, 0.2),
      rgba(99, 102, 241, 0.8),
      rgba(139, 92, 246, 0.8),
      rgba(139, 92, 246, 0.2));
  border-radius: 2px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

#xtun_ai .comm-line::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg,
      transparent,
      rgba(255, 255, 255, 0.8),
      transparent);
  animation: dataFlow 2s infinite linear;
}

#xtun_ai .comm-arrow {
  position: absolute;
  right: -8px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 10px solid rgba(139, 92, 246, 0.9);
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  filter: drop-shadow(0 2px 4px rgba(139, 92, 246, 0.3));
}

#xtun_ai .comm-line::after {
  content: 'API Request';
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.7rem;
  color: #6366f1;
  white-space: nowrap;
  background: linear-gradient(135deg, #ffffff, #f8fafc);
  padding: 4px 10px;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.15);
  font-weight: 600;
}

#xtun_ai .line-2-to-3 .comm-line::after {
  content: 'LLM Query';
}

/* Bidirectional Communication Lines */
#xtun_ai .comm-line-bidirectional {
  position: relative;
}

#xtun_ai .comm-line-bidirectional::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(270deg,
      rgba(236, 72, 153, 0.3),
      rgba(236, 72, 153, 0.7),
      rgba(236, 72, 153, 0.3));
  border-radius: 1px;
}

#xtun_ai .comm-line-bidirectional::before {
  animation: dataFlowReverse 2.5s infinite linear;
}

/* Response Arrow */
#xtun_ai .response-arrow {
  position: absolute;
  left: -8px;
  bottom: -18px;
  width: 0;
  height: 0;
  border-right: 8px solid rgba(236, 72, 153, 0.7);
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
}

#xtun_ai .connection-status {
  position: absolute;
  bottom: -50px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.65rem;
  color: #64748b;
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.9);
  padding: 3px 8px;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
}

#xtun_ai .status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  animation: pulse 2s infinite;
}

#xtun_ai .data-flow {
  position: absolute;
  bottom: -60px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.8rem;
  color: #64748b;
  opacity: 0;
  animation: fadeIn 1s ease-out 1.2s forwards;
}

#xtun_ai .flow-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
}

#xtun_ai .flow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #64748b;
  animation: pulse 2s infinite;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes pulse {

  0%,
  100% {
    opacity: 0.4;
  }

  50% {
    opacity: 1;
  }
}

@keyframes dataFlow {
  0% {
    left: -100%;
  }

  100% {
    left: 100%;
  }
}

@keyframes dataFlowReverse {
  0% {
    left: 100%;
  }

  100% {
    left: -100%;
  }
}

@keyframes connectionPulse {

  0%,
  100% {
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
    transform: scaleY(1);
  }

  50% {
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.5);
    transform: scaleY(1.2);
  }
}

@media (max-width: 1500px) {
  #xtun_ai .container {
    min-width: auto;
    max-width: 100%;
    padding: 20px 15px;
  }

  #xtun_ai .header h1 {
    font-size: 2.8rem;
  }

  #xtun_ai .architecture-diagram {
    flex-direction: column;
    gap: 50px;
  }

  #xtun_ai .communication-line {
    display: none;
  }

  #xtun_ai .tier {
    min-height: auto;
    max-width: 600px;
    margin: 0 auto;
  }

  #xtun_ai .modules {
    max-width: 100%;
  }
}

@media (max-width: 768px) {

  #xtun_ai,
  #xtun_ai body {
    padding: 20px 10px;
  }

  #xtun_ai .header h1 {
    font-size: 2.2rem;
  }

  #xtun_ai .header p {
    font-size: 1rem;
    line-height: 1.5;
  }

  #xtun_ai .tier {
    padding: 30px 15px;
  }

  #xtun_ai .tier-number {
    width: 40px;
    height: 40px;
    font-size: 1.3rem;
  }

  #xtun_ai .tier-title {
    font-size: 1.1rem;
  }

  #xtun_ai .tier-subtitle {
    font-size: 0.85rem;
  }

  #xtun_ai .module {
    padding: 20px;
  }

  #xtun_ai .module-icon {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }

  #xtun_ai .module-title {
    font-size: 1rem;
  }

  #xtun_ai .module-features li {
    font-size: 0.85rem;
  }

  #xtun_ai .llm-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  #xtun_ai .llm-option {
    padding: 16px;
  }

  #xtun_ai .data-flow {
    flex-direction: column;
    gap: 8px;
    bottom: -80px;
  }

  #xtun_ai .flow-indicator {
    font-size: 0.75rem;
  }
}

#xtun_ai .tier {
  min-height: auto !important;
  padding-top: 20px !important;
  padding-bottom: 20px !important;
}

#xtun_ai .module {
  padding: 20px !important;
}

.mcp-server-module {
  background: linear-gradient(135deg, #e6f4ea, #d4f0e2) !important;
  padding: 2px 15px !important;
  min-height: auto !important;
  border: 2px solid #a3e3b8 !important;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  /* Align content to the left */
  position: relative;
  /* Needed for pseudo-elements */
}

.mcp-server-module .module-title {
  font-size: 1.0rem !important;
  /* Smaller font size */
}

.mcp-server-module .module-header {
  margin-bottom: 0 !important;
}

.mcp-server-module .module-icon {
  width: 32px !important;
  height: 32px !important;
  font-size: 1rem !important;
}

/* New side connectors */
.mcp-server-module::before,
.mcp-server-module::after {
  content: '';
  position: absolute;
  left: -20px;
  /* Position to the side */
  width: 2px;
  background-color: #a5b4fc;
}

/* Line going up */
.mcp-server-module::before {
  height: 20px;
  /* Height of the gap */
  top: -20px;
  /* Position in the gap above */
}

/* Line going down */
.mcp-server-module::after {
  height: 20px;
  /* Height of the gap */
  bottom: -20px;
  /* Position in the gap below */
}

/* ===== Enhanced xTUN Case Section Styles ===== */

#xTUN_case {
  overflow: hidden;
  position: relative;
}

#xTUN_case::before {
  content: '';
  position: absolute;
  top: -10%;
  left: -10%;
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(152, 193, 217, 0.2), transparent 70%);
  z-index: 0;
}

#xTUN_case::after {
  content: '';
  position: absolute;
  bottom: -10%;
  right: -10%;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(61, 90, 128, 0.15), transparent 70%);
  z-index: 0;
}

#xTUN_case .container {
  position: relative;
  z-index: 1;
}


.case-study-container {
  background: linear-gradient(145deg, var(--card), var(--card-2));
  border: 1px solid transparent;
  border-radius: var(--radius-xl);
  padding: 40px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.05);
  position: relative;
  overflow: hidden;
}

.case-study-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand-3), var(--brand-2));
  opacity: 0.8;
  transition: var(--transition);
}

.case-study-container:hover {
  transform: translateY(-12px) scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-3);
  background: var(--card);
}

.case-study-container:hover::before {
  opacity: 1;
  height: 6px;
}


h3.case-title-header {
  background: linear-gradient(135deg, rgba(10, 36, 99, 0.05), rgba(61, 90, 128, 0.1));
  border: 1px solid transparent;
  border-image: linear-gradient(135deg, var(--brand-3), var(--brand-2)) 1;
  transition: var(--transition);
}

h3.case-title-header:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 15px rgba(10, 36, 99, 0.1);
}

.env-card {
  background: var(--bg-2);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn.btn-ai-demo {
  background: linear-gradient(to bottom, #2c3e50 0%, #1d2b3a 100%);
  color: #e0eafc;
  font-weight: 600;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.5);
  border: 1px solid #0a192f;
  border-radius: 12px;
  padding: 16px 50px;
  /* Increased horizontal padding */
  box-shadow:
    inset 0 1px 2px rgba(255, 255, 255, 0.2),
    0 3px 5px rgba(0, 0, 0, 0.4);
  transition: all 0.2s ease-in-out;
}

.btn.btn-ai-demo:hover {
  background: linear-gradient(to bottom, #3a5a9a 0%, #2c4a7c 100%);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow:
    inset 0 1px 2px rgba(255, 255, 255, 0.3),
    0 5px 10px rgba(0, 0, 0, 0.5);
}

.btn.btn-ai-demo:active {
  transform: translateY(1px);
  background: linear-gradient(to top, #2c3e50 0%, #1d2b3a 100%);
  box-shadow:
    inset 0 2px 4px rgba(0, 0, 0, 0.5),
    0 1px 2px rgba(0, 0, 0, 0.3);
}