@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap');

:root {
  --background-color: #0f0f1a;
  --primary-color: #1e1e2e;
  --secondary-color: #2a2a40;
  --accent-color: #ffd700;
  --text-color: #e0e0e0;
  --text-muted: #b0b0b0;
  --cell-color: #2c2c3c;
  --cell-done: #4caf50;
  --cell-visited: #9c27b0;
  --cell-current: #ff9800;
  --cell-min: #f44336;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

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

/* Title CSS */
.title {
  background-color: var(--primary-color);
  text-align: center;
  font-size: 1.8em;
  padding: 1em;
  color: var(--accent-color);
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
}

.title::after {
  content: '';
  position: absolute;
  top: 0;
  left: -50%;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.1), transparent);
  transform: skewX(-25deg);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { left: -50%; }
  100% { left: 150%; }
}

/* Navbar CSS */
.navbar {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 1em;
  font-size: 16px;
  min-height: 70px;
  padding: 1em;
  background-color: var(--secondary-color);
  transition: all 0.3s ease;
}

.navbar a {
  all: unset;
  cursor: pointer;
  color: var(--text-color);
  font-weight: 400;
  padding: 10px 20px;
  border-radius: 25px;
  transition: 0.3s;
  background-color: rgba(255, 255, 255, 0.05);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

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

.navbar #menu {
  padding: 10px 20px;
  background-color: var(--accent-color);
  color: var(--background-color);
  border: none;
  border-radius: 25px;
  cursor: pointer;
  transition: 0.3s;
  font-weight: 600;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.navbar #menu:hover {
  background-color: #fff;
  transform: translateY(-2px);
}

/* Center css */
.center {
  margin: 2em auto;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
  height: 420px;
  width: 410px;
  max-height: 731px;
  background-color: var(--primary-color);
  border-radius: 15px;
  overflow: hidden;
  position: relative;
}

.center::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(transparent, rgba(255, 215, 0, 0.1), transparent 30%);
  animation: rotate 6s linear infinite;
}

@keyframes rotate {
  100% { transform: rotate(1turn); }
}

.array {
  display: flex;
  align-items: flex-start;
  min-height: 100%;
  height: 100%;
  padding: 1rem;
  flex-direction: row;
  position: relative;
  z-index: 1;
  background-color: var(--primary-color);
}

.cell {
  flex: 0.5;
  margin: 1px;
  background-color: var(--cell-color);
  transition: all 0.4s ease;
  position: relative;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.cell.done { background-color: var(--cell-done); }
.cell.visited { background-color: var(--cell-visited); }
.cell.current { background-color: var(--cell-current); }
.cell.min { background-color: var(--cell-min); }

/* Footer CSS */
footer {
  text-align: center;
  font-size: 18px;
  color: var(--text-muted);
  padding: 2em;
  background-color: var(--secondary-color);
  margin-top: auto;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--accent-color), transparent, var(--accent-color));
}

.footer > p:nth-child(1) {
  margin-bottom: 0.8em;
}

.link {
  text-decoration: none;
  font-weight: 600;
  color: var(--accent-color);
  font-size: 22px;
  transition: 0.3s;
  position: relative;
  display: inline-block;
}

.link::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  bottom: -2px;
  left: 0;
  background-color: var(--accent-color);
  transform: scaleX(0);
  transform-origin: bottom right;
  transition: transform 0.3s ease-out;
}

.link:hover::after {
  transform: scaleX(1);
  transform-origin: bottom left;
}

.link:hover {
  text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

@media screen and (max-width: 600px) {
  .navbar { gap: 0.5em; }
  .title { font-size: 1.5em; }
  .navbar *, .navbar a { font-size: 14px; }
  footer { font-size: 16px; }
  a#random { order: 4; }
  a.start { order: 5; }
}

@media screen and (max-width: 550px) {
  .center { width: 95%; }
}