/* --- Global Reset & Design Tokens --- */
:root {
  --primary-color: rgb(0, 51, 102); /* Deep Blue */
  --primary-light: rgb(0, 74, 147); /* Brighter Deep Blue */
  --accent-color: rgb(90, 27, 9);  /* Brown Accent */
  --accent-light: #8d6e63;  /* Lighter Brown for hover */
  --dark-slate: #0f172a;
  --text-color: #334155;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --border-color: #e2e8f0;
  --transition-speed: 0.3s; /* Optimized for smooth hiding/revealing */
  --container-width: 1140px;
}

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

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-color);
  line-height: 1.6;
}

body {
  background-color: var(--bg-white);
  overflow-x: hidden; /* Prevent horizontal scroll on mobile */
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.bg-light {
  background-color: var(--bg-light);
}

.section-title {
  text-align: center;
  font-size: 2.25rem;
  color: var(--primary-color);
  margin-bottom: 48px;
  font-weight: 700;
}

/* Brown underlined section headings */
.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background-color: var(--accent-color);
  margin: 12px auto 0 auto;
  border-radius: 2px;
}

.text-white {
  color: var(--bg-white) !important;
}

/* White underlining for dark sections */
.text-white::after {
  background-color: var(--bg-white) !important;
}

/* Brown Buttons */
.btn {
  display: inline-block;
  background-color: var(--accent-color);
  color: var(--bg-white);
  padding: 14px 32px;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  transition: all var(--transition-speed);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.btn:hover {
  background-color: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 12px -2px rgba(0, 0, 0, 0.15);
}

/* --- Header & Navigation (Smart Hide / Reveal Upgraded) --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px); /* Premium blurry feel */
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  border-bottom: 1px solid var(--border-color);
  
  /* Slide Effect အတွက် ချောမွေ့သော Motion */
  transition: transform var(--transition-speed) ease-in-out; 
}

/* 🔥 Scroll အောက်ဆွဲချလိုက်လျှင် Header အပေါ်သို့ လျှောထွက်သွားမည် */
.site-header.scroll-down {
  transform: translateY(-100%);
  box-shadow: none;
}

/* 🔥 Scroll အပေါ်ပြန်တင်လိုက်လျှင် ချောမွေ့စွာ ပြန်ပေါ်လာမည် */
.site-header.scroll-up {
  transform: translateY(0);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 85px;
  padding: 10px 24px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 70%;
}

.logo-img-wrapper {
  display: flex;
  align-items: center;
  width: 50px;
  min-width: 50px;
  height: auto;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-text .main-title {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--primary-color);
  line-height: 1.2;
  letter-spacing: -0.2px;
}

.brand-text .sub-title {
  font-size: 0.8rem;
  color: #64748b;
  font-weight: 400;
  font-style: italic;
  margin-top: 2px;
}

.brand-text .sub-title strong {
  font-weight: 800;
  color: var(--primary-color);
  font-style: normal;
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav-links a {
  text-decoration: none;
  color: #475569;
  font-weight: 600;
  font-size: 0.95rem;
  transition: color var(--transition-speed);
}

.nav-links a:hover {
  color: var(--primary-color);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--primary-color);
  cursor: pointer;
  padding: 8px;
}

/* --- Hero Section --- */
.hero {
  background: linear-gradient(135deg, #001f3f 0%, #003366 100%);
  color: var(--bg-white);
  padding: 140px 0;
  text-align: center;
}

/* Glow Effects for Dark Brown Title on Blue Background */
.hero-bold {
  font-size: 3.75rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
  color: var(--accent-color);
  text-shadow: 0 0 20px rgba(255, 255, 255, 0.5), 
               0 0 8px rgba(255, 255, 255, 0.7),
               0 0 2px rgba(255, 255, 255, 0.9);
}

.hero-italic {
  font-size: 1.5rem;
  font-style: italic;
  opacity: 0.9;
  max-width: 800px;
  margin: 0 auto 40px auto;
  font-weight: 300;
  color: #e2e8f0;
}

.hero-italic strong {
  font-weight: 900;
  color: #ffffff;
  font-style: normal;
}

/* --- About Us Section --- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.about-card {
  background-color: var(--bg-white);
  padding: 36px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02);
  border-left: 5px solid var(--accent-color);
}

.about-card h3 {
  color: var(--primary-color);
  margin-bottom: 16px;
  font-size: 1.4rem;
  font-weight: 700;
}

/* --- Our Services Section --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.service-card {
  background-color: var(--bg-white);
  padding: 40px 32px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.01);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 20px -3px rgba(0,0,0,0.06);
}

.service-icon {
  color: var(--accent-color);
  margin-bottom: 24px;
  display: inline-flex;
}

.service-card h3 {
  font-size: 1.35rem;
  margin-bottom: 14px;
  color: var(--primary-color);
  font-weight: 700;
}

.short-desc {
  color: #475569;
  margin-bottom: 12px;
}

.extended-desc {
  font-size: 0.95rem;
  color: #64748b;
  margin-bottom: 16px;
}

.hidden {
  display: none;
}

.read-more-btn {
  align-self: flex-start;
  background: none;
  border: none;
  color: var(--accent-color);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  margin-top: auto;
  padding: 6px 0;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color var(--transition-speed);
}

.read-more-btn:hover {
  color: var(--accent-light);
}

/* --- Expert Solutions Section --- */
.solutions-section {
  background-color: var(--dark-slate);
  color: var(--bg-white);
}

.solutions-subtitle {
  text-align: center;
  max-width: 800px;
  margin: -24px auto 56px auto;
  font-size: 1.15rem;
  color: #94a3b8;
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.solution-card {
  background-color: rgba(255, 255, 255, 0.03);
  padding: 40px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.solution-card h3 {
  margin-bottom: 16px;
  font-size: 1.4rem;
  color: #f1f5f9;
}

.solution-card p {
  color: #94a3b8;
}

/* --- Contact Section --- */
.contact-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  max-width: 960px;
  margin: 0 auto;
}

.contact-box {
  background: var(--bg-white);
  padding: 40px;
  border-radius: 8px;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.01);
  border: 1px solid var(--border-color);
}

.contact-box h3 {
  color: var(--primary-color);
  margin-bottom: 28px;
  font-size: 1.4rem;
  font-weight: 700;
  border-bottom: 2px solid var(--bg-light);
  padding-bottom: 12px;
}

.contact-list {
  list-style: none;
}

.contact-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-list li:last-child {
  margin-bottom: 0;
}

.contact-list .icon {
  display: flex;
  color: var(--accent-color);
}

.contact-list a, .person-card a {
  color: #334155;
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-speed);
}

.contact-list a:hover, .person-card a:hover {
  color: var(--primary-color);
}

.person-card {
  margin-bottom: 28px;
}

.person-card:last-child {
  margin-bottom: 0;
}

.person-card h4 {
  color: var(--primary-color);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.person-card p {
  font-size: 0.95rem;
  line-height: 1.5;
}

/* --- Footer --- */
.site-footer {
  background-color: #0b0f19;
  color: #64748b;
  text-align: center;
  padding: 32px 24px;
  font-size: 0.9rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}

/* --- Responsive Media Queries --- */
@media (max-width: 992px) {
  .hero-bold {
      font-size: 3rem;
  }
}

@media (max-width: 768px) {
  .header-container {
      position: relative;
  }

  .logo-area {
      max-width: 85%;
  }

  .menu-toggle {
      display: block;
  }

  .nav-links {
      display: none;
      flex-direction: column;
      position: absolute;
      top: 100%;
      left: 0;
      width: 100%;
      background-color: var(--bg-white);
      padding: 24px;
      box-shadow: 0 10px 15px -3px rgba(0,0,0,0.08);
      border-bottom: 1px solid var(--border-color);
      gap: 20px;
      z-index: 999;
  }

  .nav-links.active {
      display: flex;
  }

  .hero {
      padding: 100px 0;
  }

  .hero-bold {
      font-size: 2.35rem;
  }

  .hero-italic {
      font-size: 1.15rem;
  }
  
  .brand-text .main-title {
      font-size: 1.1rem;
  }
  
  .brand-text .sub-title {
      font-size: 0.75rem;
  }

  .section {
      padding: 60px 0;
  }
}