:root {
  --body-bg-color: #f8fafc;
  --body-text-color: #222222;
  --heading-color: #222222;
  --hero-gradient1: #51e4ab;
  --hero-gradient2: #36c8af;
  --footer-bg-color: #0d0d0d;
  --link-color: #51e4ab;
  --header-bg-color: #ffffff;
  --font-family: system-ui;
  --nav-link-color: #141414;
  --footer-text-color: #ffffff;
  --header-text-color: #ffffffff;
}

html {
  overflow-x: hidden;
}

body {
  background-color: var(--body-bg-color);
  color: var(--body-text-color) !important;
  font-family: var(--font-family);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: linear-gradient(90deg, rgba(165, 165, 165, 0.03137254901960784) 0%, rgba(165, 165, 165, 0.03137254901960784) 8%, rgb(235, 235, 235) 8%, rgb(235, 235, 235) 9%, rgb(81, 228, 171) 9%, rgb(81, 228, 171) 14%, rgba(212, 212, 212, 0.03137254901960784) 14%, rgba(212, 212, 212, 0.03137254901960784) 17%, rgba(219, 219, 219, 0.03137254901960784) 17%, rgba(219, 219, 219, 0.03137254901960784) 95%, rgba(86, 86, 86, 0.03) 95%, rgba(86, 86, 86, 0.03) 100%), linear-gradient(67.5deg, rgba(80, 80, 80, 0.03137254901960784) 0%, rgba(80, 80, 80, 0.03137254901960784) 11%, rgba(138, 138, 138, 0.03137254901960784) 11%, rgba(138, 138, 138, 0.03137254901960784) 17%, rgba(122, 122, 122, 0.03137254901960784) 17%, rgba(122, 122, 122, 0.03137254901960784) 24%, rgba(166, 166, 166, 0.03137254901960784) 24%, rgba(166, 166, 166, 0.03137254901960784) 27%, rgba(245, 245, 245, 0.03137254901960784) 27%, rgba(245, 245, 245, 0.03137254901960784) 89%, rgba(88, 88, 88, 0.03137254901960784) 89%, rgba(88, 88, 88, 0.03137254901960784) 100%), linear-gradient(67.5deg, rgba(244, 244, 244, 0.03137254901960784) 0%, rgba(244, 244, 244, 0.03137254901960784) 4%, rgb(54, 200, 175) 4%, rgb(54, 200, 175) 10%, rgba(157, 157, 157, 0.03137254901960784) 10%, rgba(157, 157, 157, 0.03137254901960784) 20%, rgba(212, 212, 212, 0.03137254901960784) 20%, rgba(212, 212, 212, 0.03137254901960784) 83%, rgb(81, 228, 171) 83%, rgb(81, 228, 171) 84%, rgb(237, 237, 237) 84%, rgb(237, 237, 237) 100%), linear-gradient(90deg, rgb(255, 255, 255), rgb(255, 255, 255));
}


h1 {
  font-size: clamp(2rem, 4vw, 2.5rem) !important;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2rem) !important;
}

h3 {
  font-size: clamp(1.4rem, 3vw, 1.7rem) !important;
}

p {
  margin-bottom: 0.5rem !important;
}

section {
  padding: 40px 0;
  scroll-margin-top: 70px;
}

section h2 {
  position: relative;
  margin-bottom: 1.5rem;
  padding-left: 1.25rem;

  color: var(--heading-color);
  font-weight: 700;
  line-height: 1.35;

  /* Thai-friendly readability */
  letter-spacing: normal;
  word-break: keep-all;

  /* Subtle emphasis */
  background: linear-gradient(90deg,
      rgba(81, 228, 171, 0.18),
      transparent 65%);
}

/* Accent bar */
section h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15em;
  width: 4px;
  height: 70%;
  border-radius: 2px;
  background: linear-gradient(180deg,
      var(--hero-gradient1),
      var(--hero-gradient2));
}



.content-area a {
  color: var(--link-color) !important;
  text-decoration: none !important;
}

.content-area a:hover {
  color: var(--link-color) !important;
  opacity: 0.8;
}

.sidebar-page-list {
  padding: 0;
  margin: 0;
  margin-bottom: 17px;
  width: 279px;
}

.sidebar-page-list li {
  list-style-type: disc;
  list-style-position: inside;
  color: var(--heading-color);
}

.sidebar-page-list li::marker {
  color: var(--link-color);
  font-size: 1.2em;
}

.sidebar-page-list li:last-child {
  border-bottom: none;
}

.sidebar-page-list li a {
  padding: 12px 0;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
  color: var(--link-color);
}

.sidebar-page-list li a:hover {
  padding-left: 11px;
}

.twitter-tweet {
  width: 279px !important;
}

.x {
  display: flex;
  justify-content: center;
}

.error_page {
  min-height: 70vh;
}


.footer-news {
  background: var(--footer-bg-color);
  padding: 1rem 0;
  position: relative;
  overflow: hidden;
  color: var(--footer-text-color);
  margin-top: auto;
}

.footer-news a {
  color: var(--link-color);
  text-decoration: none;
  position: relative;
}

.footer-news a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--link-color);
  transition: width 0.3s ease;
}

.footer-news a:hover::after {
  width: 100%;
}

.footer-newsletter h3 {
  color: var(--footer-text-color) !important;
  margin-bottom: 1rem;
  font-weight: 600;
}

.newsletter-form input {
  padding: 0.6rem 1rem;
  border: 1px solid var(--link-color);
  border-radius: 5px;
  font-size: 1rem;
}

.newsletter-form button {
  padding: 0.6rem 1.5rem;
  border: none;
  background: var(--link-color);
  color: #fff;
  font-weight: 600;
  border-radius: 5px;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.newsletter-form button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(102, 143, 106, 0.2);
}

.footer-social .social-icon {
  font-size: 1.5rem;
  margin: 0 0.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--link-color);
  width: 40px;
  height: 40px;
  line-height: 40px;
  border: 2px solid var(--link-color);
  border-radius: 50%;
  text-align: center;
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
  cursor: pointer;
}

.footer-social .social-icon:hover {
  transform: scale(1.2) rotate(-10deg);
  background: var(--link-color);
  color: #fff;
}

.footer-news::after {
  right: 10px;
  top: auto;
  bottom: 10px;
  left: auto;
}

/* Responsive */
@media (max-width: 767px) {

  .newsletter-form input,
  .newsletter-form button {
    width: 100%;
  }
}


.navbar {
  background-color: var(--header-bg-color) !important;
  position: sticky;
  top: 0;
  z-index: 1020;
  box-shadow: rgba(100, 100, 111, 0.2) 0px 7px 29px 0px;
}

.hero-section {
  padding: 115px 0 25px 0;
  position: relative;
  overflow: hidden;
  color: var(--body-text-color);
}

.hero-section.gradient-bg {
  background-image: linear-gradient(112.5deg, rgb(214, 214, 214) 0%, rgb(214, 214, 214) 10%, rgb(195, 195, 195) 10%, rgb(195, 195, 195) 53%, rgb(176, 176, 176) 53%, rgb(176, 176, 176) 55%, rgb(157, 157, 157) 55%, rgb(157, 157, 157) 60%, rgb(137, 137, 137) 60%, rgb(137, 137, 137) 88%, rgb(81, 228, 171) 88%, rgb(81, 228, 171) 91%, rgb(54, 200, 175) 91%, rgb(54, 200, 175) 100%), linear-gradient(157.5deg, rgb(214, 214, 214) 0%, rgb(214, 214, 214) 10%, rgb(195, 195, 195) 10%, rgb(195, 195, 195) 53%, rgb(176, 176, 176) 53%, rgb(176, 176, 176) 55%, rgb(157, 157, 157) 55%, rgb(157, 157, 157) 60%, rgb(137, 137, 137) 60%, rgb(137, 137, 137) 88%, rgb(81, 228, 171) 88%, rgb(81, 228, 171) 91%, rgb(54, 200, 175) 91%, rgb(54, 200, 175) 100%), linear-gradient(135deg, rgb(214, 214, 214) 0%, rgb(214, 214, 214) 10%, rgb(195, 195, 195) 10%, rgb(195, 195, 195) 53%, rgb(176, 176, 176) 53%, rgb(176, 176, 176) 55%, rgb(157, 157, 157) 55%, rgb(157, 157, 157) 60%, rgb(137, 137, 137) 60%, rgb(137, 137, 137) 88%, rgb(81, 228, 171) 88%, rgb(81, 228, 171) 91%, rgb(54, 200, 175) 91%, rgb(54, 200, 175) 100%), linear-gradient(90deg, rgb(195, 195, 195), rgb(81, 228, 171));
  background-blend-mode: overlay, overlay, overlay, normal;
}

.hero-section .container {
  position: relative;
  z-index: 2;
}

.navbar-light .navbar-nav .nav-link {
  color: var(--nav-link-color, #141414) !important;
}

.navbar-light .navbar-nav .nav-link.active {
  color: var(--link-color) !important;
  font-weight: bold;
}

/* Mobile nav */
@media (max-width: 1199.98px) {
  .navbar-collapse {
    position: fixed;
    top: 61px;
    left: 15px;
    right: 15px;
    background-color: color-mix(in srgb, var(--header-bg-color) 65%, transparent);
    backdrop-filter: blur(12px);
    border-radius: 12px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    z-index: 9999;
    padding: 15px;
    margin: 0;
  }

  .navbar-nav {
    width: 100%;
  }

  .navbar-nav .nav-item {
    margin: 7px 0;
  }

  .navbar-nav .nav-item:hover {
    transform: translateY(-1px);
  }

  .navbar-nav .nav-link {
    font-size: 1.2rem;
    font-weight: 500;
    text-decoration: none;
    display: block;
    padding: 0;
  }

  .navbar-toggler {
    z-index: 10000;
    position: relative;
    border: var(--bs-border-width) solid var(--nav-link-color, #141414) !important;
  }
}


.custom-dropdown {
  border: 0;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
  border-radius: 12px;
  padding: 0.5rem 0;
  margin-top: 0.5rem;
  min-width: 220px;
  background: color-mix(in srgb,
      var(--header-bg-color) 65%,
      transparent) !important;
  backdrop-filter: blur(12px);
}

.custom-dropdown .dropdown-item {
  padding: 0.75rem 1.5rem;
  transition: all 0.3s ease;
  color: var(--nav-link-color, #141414) !important;
  font-weight: 500;
  border-radius: 0;
  text-wrap: wrap;
}

.dropdown-menu {
  display: none;
}

.custom-dropdown .dropdown-item:hover {
  color: #fff;
  background: color-mix(in srgb,
      var(--header-bg-color) 95%,
      transparent) !important;
}

.nav-item.dropdown>.nav-link {
  display: flex;
  align-items: center;
}

.nav-item.dropdown>.nav-link .arrow {
  position: relative;
  margin-left: auto;
  border: solid var(--nav-link-color, #141414);
  border-width: 0 2px 2px 0;
  padding: 3px;
  transform: rotate(45deg);
  transition: transform 0.25s;
}

.dropdown.open .dropdown-menu {
  display: block;
}


@media (min-width: 1200px) {
  .nav-item.dropdown {
    position: relative;
  }

  .nav-item.dropdown>.nav-link .arrow {
    margin-left: 7px;
  }

  .custom-dropdown.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 0;
    z-index: 1000;
  }

  .nav-item.dropdown:hover>.nav-link .arrow {
    transform: rotate(-135deg);
  }

  .nav-item.dropdown:hover>.dropdown-menu {
    display: block !important;
  }
}

@media (max-width: 1199px) {
  .nav-item.dropdown>.nav-link .arrow {
    padding: 4px;
  }
}


.floating-rounded-navbar {
  background-color: var(--header-bg-color) !important;
  position: fixed !important;
  top: 15px !important;
  left: 7px !important;
  right: 7px !important;
  width: calc(100% - 11px) !important;
  z-index: 2000;
  border-radius: 21px;
  transition: all 0.3s ease;
}


@media (max-width: 1199.98px) {
  .floating-rounded-navbar .navbar-collapse {
    top: 85px !important;
  }
}

.navbar-brand {
  margin-right: 0 !important;
}



.scroll-top {
  position: fixed;
  visibility: hidden;
  opacity: 0;
  right: 15px;
  bottom: -15px;
  z-index: 99999;
  background-color: var(--link-color);
  width: 44px;
  height: 44px;
  border-radius: 50px;
  transition: all 0.4s;
}

.scroll-top i {
  font-size: 24px;
  color: var(--footer-bg-color);
  line-height: 0;
}

.scroll-top:hover {
  background-color: color-mix(in srgb, var(--link-color), transparent 20%);
  color: var(--footer-bg-color);
}

.scroll-top.active {
  visibility: visible;
  opacity: 1;
  bottom: 15px;
}

.box {
  position: relative;
  padding: 2rem;
  border-radius: 1.5rem;
  background:
    linear-gradient(135deg,
      rgba(81, 228, 171, 0.18),
      rgba(54, 200, 175, 0.12)),
    linear-gradient(180deg,
      #ffffff,
      var(--body-bg-color));
  color: var(--body-text-color);

  /* Depth & presence */
  box-shadow:
    0 20px 35px rgba(0, 0, 0, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.7),
    inset 0 -1px 0 rgba(0, 0, 0, 0.05);

  /* Always-on glow */
  outline: 1px solid rgba(81, 228, 171, 0.35);

  overflow: hidden;
}

/* Ambient glow layer */
.box::before {
  content: "";
  position: absolute;
  top: -40%;
  left: -40%;
  width: 180%;
  height: 180%;
  background:
    radial-gradient(circle at top left,
      rgba(81, 228, 171, 0.35),
      transparent 55%);
  opacity: 0.8;
  pointer-events: none;
}

/* Texture / depth layer */
.box::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg,
      rgba(255, 255, 255, 0.25),
      transparent 40%,
      rgba(0, 0, 0, 0.04));
  mix-blend-mode: overlay;
  pointer-events: none;
}

/* Hover = emphasis, not activation */
.box:hover {
  box-shadow:
    0 28px 55px rgba(0, 0, 0, 0.18),
    0 0 0 1px rgba(81, 228, 171, 0.45),
    0 0 40px rgba(81, 228, 171, 0.25);
}