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

body {
  font-family: "Segoe UI", Arial, sans-serif;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: #eee;
  padding: 40px 20px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

h1 {
  text-align: center;
  margin-bottom: 10px;
}

.subtitle {
  text-align: center;
  color: #aaa;
  margin-bottom: 40px;
}

.section {
  background-color: #0f3460;
  border-radius: 16px;
  padding: 25px;
  margin-bottom: 30px;
}

.section-title {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 15px;
  color: #4a90e2;
  border-left: 4px solid #4a90e2;
  padding-left: 15px;
}

.section-description {
  color: #aaa;
  margin-bottom: 25px;
  font-size: 14px;
  padding-left: 19px;
}

.code {
  background-color: #0a0a1a;
  padding: 15px;
  border-radius: 8px;
  font-family: "Courier New", monospace;
  font-size: 13px;
  color: #82b1ff;
  overflow-x: auto;
  margin-top: 15px;
}

.note {
  background-color: #1a1a2e;
  border-left: 4px solid #f39c12;
  padding: 15px;
  border-radius: 8px;
  margin: 15px 0;
}

/* ===================================
           HOLY GRAIL LAYOUT 1: BASIC
           =================================== */
.holygrail-1 {
  display: grid;
  grid-template-areas:
    "header header header"
    "sidebar-left main sidebar-right"
    "footer footer footer";
  grid-template-columns: 200px 1fr 200px;
  gap: 20px;
  min-height: 100vh;
}

.header-1 {
  grid-area: header;
  background-color: #4a90e2;
  padding: 20px;
  border-radius: 8px;
}
.sidebar-left-1 {
  grid-area: sidebar-left;
  background-color: #e94560;
  padding: 20px;
  border-radius: 8px;
}
.main-1 {
  grid-area: main;
  background-color: #2ecc71;
  padding: 20px;
  border-radius: 8px;
}
.sidebar-right-1 {
  grid-area: sidebar-right;
  background-color: #9b59b6;
  padding: 20px;
  border-radius: 8px;
}
.footer-1 {
  grid-area: footer;
  background-color: #f39c12;
  padding: 20px;
  border-radius: 8px;
}

/* ===================================
           HOLY GRAIL LAYOUT 2: WITH CONTENT
           =================================== */
.holygrail-2 {
  display: grid;
  grid-template-areas:
    "header header header"
    "nav main aside"
    "footer footer footer";
  grid-template-columns: 220px 1fr 250px;
  gap: 20px;
  min-height: 100vh;
}

.header-2 {
  grid-area: header;
  background-color: #1a1a2e;
  padding: 20px;
  border-radius: 8px;
  border-bottom: 3px solid #4a90e2;
}
.nav-2 {
  grid-area: nav;
  background-color: #16213e;
  padding: 20px;
  border-radius: 8px;
}
.main-2 {
  grid-area: main;
  background-color: #0f3460;
  padding: 20px;
  border-radius: 8px;
}
.aside-2 {
  grid-area: aside;
  background-color: #16213e;
  padding: 20px;
  border-radius: 8px;
}
.footer-2 {
  grid-area: footer;
  background-color: #1a1a2e;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  border-top: 1px solid #4a90e2;
}

.nav-2 ul {
  list-style: none;
}

.nav-2 li {
  margin: 15px 0;
}

.nav-2 a {
  color: #4a90e2;
  text-decoration: none;
}

.nav-2 a:hover {
  color: #e94560;
}

.aside-2 h3 {
  color: #4a90e2;
  margin-bottom: 10px;
}

.aside-2 p {
  font-size: 14px;
  color: #aaa;
  margin-bottom: 15px;
}

/* ===================================
           HOLY GRAIL LAYOUT 3: RESPONSIVE
           =================================== */
.holygrail-3 {
  display: grid;
  grid-template-areas:
    "header"
    "sidebar-left"
    "main"
    "sidebar-right"
    "footer";
  grid-template-columns: 1fr;
  gap: 20px;
}

/* Desktop layout */
@media (min-width: 768px) {
  .holygrail-3 {
    grid-template-areas:
      "header header header"
      "sidebar-left main sidebar-right"
      "footer footer footer";
    grid-template-columns: 200px 1fr 200px;
  }
}

.header-3 {
  grid-area: header;
  background-color: #4a90e2;
  padding: 20px;
  border-radius: 8px;
}
.sidebar-left-3 {
  grid-area: sidebar-left;
  background-color: #e94560;
  padding: 20px;
  border-radius: 8px;
}
.main-3 {
  grid-area: main;
  background-color: #2ecc71;
  padding: 20px;
  border-radius: 8px;
}
.sidebar-right-3 {
  grid-area: sidebar-right;
  background-color: #9b59b6;
  padding: 20px;
  border-radius: 8px;
}
.footer-3 {
  grid-area: footer;
  background-color: #f39c12;
  padding: 20px;
  border-radius: 8px;
}

/* ===================================
           HOLY GRAIL LAYOUT 4: BLOG STYLE
           =================================== */
.holygrail-4 {
  display: grid;
  grid-template-areas:
    "header header"
    "main sidebar"
    "footer footer";
  grid-template-columns: 1fr 300px;
  gap: 30px;
}

.header-4 {
  grid-area: header;
  background-color: #1a1a2e;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 20px;
}
.main-4 {
  grid-area: main;
  background-color: #0f3460;
  padding: 25px;
  border-radius: 8px;
}
.sidebar-4 {
  grid-area: sidebar;
  background-color: #16213e;
  padding: 25px;
  border-radius: 8px;
}
.footer-4 {
  grid-area: footer;
  background-color: #1a1a2e;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  margin-top: 20px;
}

.post-meta {
  color: #4a90e2;
  font-size: 14px;
  margin-bottom: 15px;
}

.sidebar-4 h3 {
  color: #4a90e2;
  margin-bottom: 15px;
}

.sidebar-4 ul {
  list-style: none;
}

.sidebar-4 li {
  margin: 10px 0;
}

.sidebar-4 a {
  color: #aaa;
  text-decoration: none;
}

.sidebar-4 a:hover {
  color: #4a90e2;
}

footer {
  text-align: center;
  padding: 40px;
  color: #666;
}