:root {
  --primary-color: #1abc9c;
  --secondary-color: #16a085;
  --accent-color: #50c5b7;
  --danger-color: #ff1493;
  --success-color: #9cec5b;
  --bg-light: #e8e893;
  --text-light: #ffffff;
  --text-dark: #2c3e50;
  --shadow: 0 4px 10px rgba(0, 0, 0, 0.12);
  --radius: 12px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Roboto", sans-serif;
  user-select: none;
}

body {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-light);
  color: var(--text-dark);
}

/* Title */
.title {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  font-size: 1.6em;
  font-weight: 600;
  padding: 0.7em;
  color: var(--text-light);
  letter-spacing: 1px;
  box-shadow: var(--shadow);
  cursor: pointer;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 1em;
  padding: 0.8em;
  background: var(--secondary-color);
  box-shadow: var(--shadow);
}

.navbar a,
.navbar select {
  all: unset;
  cursor: pointer;
  font-weight: 500;
  font-size: 15px;
  padding: 8px 14px;
  border-radius: 50px;
  color: var(--text-light);
  background: var(--primary-color);
  transition: all 0.3s ease;
}

.navbar a:hover,
.navbar select:hover {
  background: var(--accent-color);
  transform: translateY(-2px);
}

.navbar .icon {
  display: none;
}

#menu,
#random,
#start {
  border: none;
  outline: none;
}

/* Center */
.center {
    /* margin-top: 2rem auto */
  margin: 2rem auto;
  background: #e7e3cf;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  height: 420px;
  width: 70%;
  max-height: 731px;
  overflow: hidden;
  padding: 1rem;
}

.array {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  height: 100%;
  gap: 2px;
}

/* Sorting bars */
.cell {
  flex: 0.5;
  margin: 1px;
  background: #3b5303;
  border-radius: 4px;
  transition: all 0.3s ease;
}

.cell.done {
  background: var(--success-color);
}

.cell.visited {
  background: #6184d8;
}

.cell.current {
  background: var(--accent-color);
}

.cell.min {
  background: var(--danger-color);
}

/* Responsive */
@media screen and (max-width: 600px) {
  .title {
    font-size: 1.3em;
  }
  .navbar {
    gap: 0.5em;
  }
  .navbar *,
  .navbar a {
    font-size: 13px;
    padding: 6px 10px;
  }
  .center {
    width: 95%;
  }
}