* {
  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;
}

/* Demo layout styling */
.demo-layout {
  display: grid;
  gap: 20px;
  margin: 20px 0;
}

.header-area {
  background-color: #4a90e2;
  padding: 20px;
  text-align: center;
  border-radius: 8px;
  font-weight: bold;
}

.sidebar-area {
  background-color: #e94560;
  padding: 20px;
  text-align: center;
  border-radius: 8px;
}

.main-area {
  background-color: #2ecc71;
  padding: 20px;
  text-align: center;
  border-radius: 8px;
}

.footer-area {
  background-color: #f39c12;
  padding: 20px;
  text-align: center;
  border-radius: 8px;
  font-weight: bold;
}

.right-sidebar {
  background-color: #9b59b6;
  padding: 20px;
  text-align: center;
  border-radius: 8px;
}

/* ===================================
           DEMO 1: BASIC GRID AREAS
           =================================== */
.layout-1 {
  grid-template-areas:
    "header header header"
    "sidebar main main"
    "footer footer footer";
  grid-template-columns: 250px 1fr 1fr;
}

.item-header {
  grid-area: header;
  background-color: #4a90e2;
}
.item-sidebar {
  grid-area: sidebar;
  background-color: #e94560;
}
.item-main {
  grid-area: main;
  background-color: #2ecc71;
}
.item-footer {
  grid-area: footer;
  background-color: #f39c12;
}

/* ===================================
           DEMO 2: WITH RIGHT SIDEBAR
           =================================== */
.layout-2 {
  grid-template-areas:
    "header header header"
    "sidebar main right"
    "footer footer footer";
  grid-template-columns: 200px 1fr 200px;
}

/* ===================================
           DEMO 3: COMPLEX LAYOUT
           =================================== */
.layout-3 {
  grid-template-areas:
    "header header header header"
    "sidebar main main right"
    "sidebar feature1 feature2 right"
    "footer footer footer footer";
  grid-template-columns: 200px 1fr 1fr 200px;
}

/* ===================================
           DEMO 4: BLOG LAYOUT
           =================================== */
.layout-4 {
  grid-template-areas:
    "header header"
    "main sidebar"
    "footer footer";
  grid-template-columns: 1fr 300px;
}

/* ===================================
           DEMO 5: DASHBOARD LAYOUT
           =================================== */
.layout-5 {
  grid-template-areas:
    "header header header"
    "stats stats stats"
    "chart1 chart2 chart3"
    "table table table";
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}

.stats {
  grid-area: stats;
  display: flex;
  gap: 20px;
}
.stat-card {
  flex: 1;
  background-color: #4a90e2;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
}
.chart1 {
  grid-area: chart1;
  background-color: #e94560;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  min-height: 150px;
}
.chart2 {
  grid-area: chart2;
  background-color: #2ecc71;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  min-height: 150px;
}
.chart3 {
  grid-area: chart3;
  background-color: #f39c12;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  min-height: 150px;
}
.table-area {
  grid-area: table;
  background-color: #1a1a2e;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  border: 1px solid #4a90e2;
}

/* Responsive */
@media (max-width: 768px) {
  .layout-3 {
    grid-template-areas:
      "header"
      "sidebar"
      "main"
      "right"
      "feature1"
      "feature2"
      "footer";
    grid-template-columns: 1fr;
  }

  .layout-5 {
    grid-template-areas:
      "header"
      "stats"
      "chart1"
      "chart2"
      "chart3"
      "table";
    grid-template-columns: 1fr;
  }

  .stats {
    flex-direction: column;
  }
}

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