/* =========================================================
   COMPLETE CI/CD LESSON SIDEBAR + LAYOUT + SUBMENU STYLES
   ========================================================= */

/* LAYOUT */
.lesson-layout {
  display: flex;
  gap: 30px;
  align-items: flex-start;
}

main {
  flex: 1;
}

.container {
  display: flex;
  gap: 30px;
}

/* ================= SIDEBAR ================= */


.lesson-sidebar {
  width: 260px;
  position: fixed;
  right: 20px;
  left: auto;
  top: 120px;
  max-height: calc(100vh - 140px);
  overflow-y: auto;
  background: linear-gradient(180deg, #8A2BE2, #9370DB);
  border-radius: 16px;
  padding: 18px 16px 22px;
  box-shadow: 0 8px 18px rgba(138,43,226,0.35);
  scroll-behavior: smooth;
}

/* Sidebar title */
.lesson-sidebar h3 {
  margin-top: 0;
  margin-bottom: 14px;
  font-size: 18px;
  font-weight: 800;
}

.lesson-sidebar h3 a {
  color: #ffffff;
  text-decoration: none;
}

.lesson-sidebar h3 a:hover {
  text-decoration: underline;
}

/* Sidebar links */
.lesson-sidebar a {
  display: block;
  padding: 9px 12px;
  margin-bottom: 8px;
  text-decoration: none;
  color: #fff3e6;
  font-weight: 700;
  border-radius: 10px;
  transition: all 0.25s ease;
}

/* Hover */
.lesson-sidebar a:hover {
  background: rgba(255,255,255,0.25);
  color: #ffffff;
}

/* Active section */
.lesson-sidebar a.active {
  background: #ffffff;
  color: #ff7a18;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

/* Sidebar top link */
.sidebar-top-link {
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
}

/* Custom scrollbar */
.lesson-sidebar::-webkit-scrollbar {
  width: 6px;
}

.lesson-sidebar::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.6);
  border-radius: 10px;
}

.lesson-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

/* ================= SUBMENU ================= */

.lesson-with-submenu {
  display: flex;
  flex-direction: column;
}

.lesson-with-submenu > a {
  font-weight: bold;
  color: #ffffff;
  padding-left: 10px;
  cursor: pointer;
}

/* Submenu container */
.lesson-with-submenu .submenu {
  display: flex;
  flex-direction: column;
  padding-left: 40px;
  gap: 4px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}

/* When submenu is open */
.lesson-with-submenu .submenu.open {
  max-height: 500px;
}

/* Submenu links */
.lesson-with-submenu .submenu a {
  font-size: 0.95em;
  color: #ffffff;
  text-decoration: none;
  padding: 3px 0;
  font-weight: 500;
}

/* Hover effect */
.lesson-with-submenu .submenu a:hover {
  color: #00bfff;
  font-weight: 600;
}

.lesson-with-submenu .submenu a.active {
  background: #ffffff;
  color: #8A2BE2;
  padding: 6px 10px;
  border-radius: 8px;
  font-weight: 700;
}

/* ================= DIAGRAM ================= */

.diagram {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 15px;
}

.diagram-box {
  background: #eef3ff;
  padding: 14px 18px;
  border-radius: 8px;
  font-weight: 700;
  color: #0056b3;
  box-shadow: 0 3px 6px rgba(0,0,0,0.1);
  text-align: center;
}

.diagram-arrow {
  font-size: 22px;
  font-weight: bold;
  align-self: center;
  color: #007bff;
}

/* ================= CI/CD FLOW ================= */

.cicd-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.flow-step {
  background: linear-gradient(135deg, #e6f0ff, #f4f8ff);
  color: #0056b3;
  padding: 14px 22px;
  border-radius: 14px;
  font-weight: 800;
  min-width: 110px;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.12);
}

.flow-arrow {
  font-size: 26px;
  font-weight: 900;
  color: #007bff;
}

/* ================= HEADER / HERO / FOOTER SAFETY ================= */

header.navbar {
  position: relative;
  z-index: 1000;
}

.hero {
  margin-top: 20px;
  z-index: 1;
}

footer {
  position: relative;
  z-index: 1;
}



/* ================= Lesson stlyes - custom ================= */

.lesson-list {
  margin-left: 20px;
  padding-left: 10px;
}

.lesson-list li {
  margin-bottom: 10px;
  font-weight: 500;
}

.lesson-list,
.lesson-steps {
  margin-left: 20px;
  padding-left: 10px;
}

.lesson-list li,
.lesson-steps li {
  margin-bottom: 10px;
  font-weight: 500;
}

.code-block {
  background: #0f172a;
  color: #e5e7eb;
  padding: 14px 18px;
  border-radius: 10px;
  font-family: "Courier New", monospace;
  font-size: 14px;
  overflow-x: auto;
  margin: 15px 0;
}

.terminal-box {
  background: #0f172a;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(0,0,0,0.25);
  margin: 20px 0;
}

.terminal-header {
  background: #1e293b;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.red { background: #ef4444; }
.yellow { background: #facc15; }
.green { background: #22c55e; }

.terminal-title {
  margin-left: auto;
  color: #cbd5f5;
  font-weight: 700;
  font-size: 13px;
}

.terminal-content {
  color: #e5e7eb;
  padding: 18px;
  font-family: "Courier New", monospace;
  font-size: 14px;
  line-height: 1.6;
}



/* ================= MOBILE SLIDE-IN SIDEBAR ================= */

.mobile-sidebar-btn {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: linear-gradient(135deg, #8A2BE2, #9370DB);
  color: white;
  border: none;
  padding: 12px 18px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 700;
  box-shadow: 0 6px 16px rgba(0,0,0,0.25);
  z-index: 2000;
  cursor: pointer;
}

/* Mobile behavior */
@media (max-width: 900px) {
  .mobile-sidebar-btn {
    display: block;
  }

  .lesson-sidebar {
    position: fixed;
    right: -100%;
    top: 0;
    width: 80%;
    max-width: 320px;
    height: 70vh;
    background: linear-gradient(180deg, #8A2BE2, #9370DB);
    z-index: 1500;
    transition: right 0.35s ease;
    padding-top: 80px;
  }

  .lesson-sidebar.open {
    right: 0;
  }
}

/* desktop only behavior */
@media (min-width: 901px) {
  .container {
    margin-right: 300px;
  }
}