/* 🌐 GLOBAL */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #e0f2fe;
  text-align: center;
}

/* 🏷 TITLE */
.title {
  font-size: 55px;
  margin-top: 80px;
  color: #0369a1;
}

.subtitle {
  font-size: 18px;
  color: #334155;
}

/* 🏠 HOME CARDS */
.card-container {
  margin-top: 60px;
  display: flex;
  justify-content: center;
  gap: 40px;
}

.card {
  padding: 40px 60px;
  border-radius: 20px;
  text-decoration: none;
  font-size: 22px;
  font-weight: bold;
  color: #0f172a;
  box-shadow: 0 8px 20px rgba(0,0,0,0.1);
  transition: 0.3s;
}

.card:hover {
  transform: scale(1.1);
}

.bubble { background-color: #bae6fd; }
.selection { background-color: #ddd6fe; }
.insertion { background-color: #bbf7d0; }

/* 🎨 PAGE BACKGROUNDS */
.bubble-bg { background-color: #bae6fd; min-height: 100vh; }
.selection-bg { background-color: #ddd6fe; min-height: 100vh; }
.insertion-bg { background-color: #bbf7d0; min-height: 100vh; }

/* 📦 LAYOUT */
.layout {
  display: flex;
  gap: 30px;
  padding: 20px;
  align-items: flex-start;
}

/* 📘 LEFT PANEL */
.side-box {
  width: 260px;
  background: #e0f2fe;
  padding: 18px;
  border-radius: 16px;
  box-shadow: 0 5px 14px rgba(0,0,0,0.1);
  text-align: left;
}

.side-box h3 {
  margin-top: 18px;
  color: #075985;
}

/* 📗 MAIN AREA */
.main {
  flex: 1;
}

/* 🎛 CONTROLS */
.controls {
  margin: 20px;
}

.controls input {
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid #94a3b8;
  width: 260px;
  font-size: 15px;
}

.controls button {
  padding: 10px 16px;
  margin: 5px;
  border: none;
  border-radius: 10px;
  background: white;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 3px 8px rgba(0,0,0,0.1);
  transition: 0.3s;
}

.controls button:hover {
  transform: scale(1.05);
}

/* 📊 ARRAY */
#array {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 10px;
  margin-top: 30px;
  min-height: 260px;
  padding: 20px;
}

/* 📊 BASE BAR */
.bar {
  width: 45px;
  border-radius: 8px 8px 0 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  color: black;
  font-weight: bold;
  font-size: 15px;
  padding-bottom: 8px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.12);
  transition: all 0.4s ease;
}

/* 🎨 ALGORITHM COLORS */
.bubble-bg .bar {
  background: #0284c7;
}

.selection-bg .bar {
  background: #7c3aed;
}

.insertion-bg .bar {
  background: linear-gradient(to top, #16a34a, #86efac);
}

/* 🔁 STATES */
.compare { background: #facc15 !important; }
.swap { background: #ef4444 !important; }
.sorted { background: #22c55e !important; }

/* 📘 EXPLANATION */
.explanation {
  margin: 20px auto;
  width: 70%;
  padding: 15px;
  background: white;
  border-radius: 12px;
  font-size: 16px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

/* 📊 STEP BOX */
.step-box {
  margin-top: 10px;
  padding: 12px;
  background: white;
  border-radius: 10px;
  font-size: 14px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

/* 💻 CODE BLOCK (MATCH LEFT PANEL) */
.code-scroll {
  background: #e0f2fe;   /* SAME as side-box */
  color: #0f172a;
  padding: 12px;
  border-radius: 10px;
  font-family: monospace;
  font-size: 13px;
  height: 180px;
  overflow-y: auto;
}

/* remove spacing */
.code-scroll pre {
  margin: 0;
}

/* ✨ SCROLLBAR */
.code-scroll::-webkit-scrollbar {
  width: 6px;
}

.code-scroll::-webkit-scrollbar-thumb {
  background: #94a3b8;
  border-radius: 10px;
}
/* 🌿 Bubble → very light pastel green */
.bubble-bg .side-box {
  background: #ecfdf5;
}

/* 🌊 Selection → very light pastel blue */
.selection-bg .side-box {
  background: #f0f9ff;
}

/* 💜 Insertion → very light pastel lavender */
.insertion-bg .side-box {
  background: #f5f3ff;
}
/* 🌿 Bubble → soft pastel green background */

/* 🔵 Bubble → lighter pastel blue */
.bubble-bg {
  background-color: #dbeafe;
}

/* 💜 Selection → lighter pastel lavender */
.selection-bg {
  background-color: #ede9fe;
}

/* 🟢 Insertion → lighter pastel green */
.insertion-bg {
  background-color: #dcfce7;
}
/* Quick Sort page background */
/* 🟠 Quick → very light pastel orange */
.quick-bg {
  background-color: #fff7ed;
  min-height: 100vh;
}
/* Quick Sort left panel */
.quick {
  background-color: #fed7aa; /* pastel light orange */
}
/* 🟠 Quick Sort bars → soft orange */
.quick-bg .bar {
  background: linear-gradient(to top, #fb923c, #fed7aa);
}
.merge-bg {
  background-color: #fffbeb; /* very light pastel yellow */
  min-height: 100vh;
}
.merge-bg .side-box {
  background: #fce7f3; /* light pastel pink */
}
.merge {
  background-color: #fde68a; /* light pastel yellow */
}
.merge-bg .bar {
  background: linear-gradient(to top, #eab308, #fde68a);
}