/* ===== Algorithm Visualizer — Matching Main Site Style ===== */

/* Font faces — same as main site */
@font-face {
  font-family: averta_bold;
  src: url(../../fonts/AvertaCY-Bold.ttf);
}
@font-face {
  font-family: averta_regular;
  src: url(../../fonts/AvertaCY-Regular.woff2);
}
@font-face {
  font-family: averta_light;
  src: url(../../fonts/AvertaCY-Light.woff2);
}

:root {
  --primary: #000000;
  --primary-light: #333333;
  --secondary: #616161;
  --accent: #000000;
  --light: #f5f5f5;
  --bg: #ffffff;
  --card-bg: #ffffff;
  --card-border: #e0e0e0;
  --success: #2e7d32;
  --warning: #e65100;
  --danger: #c62828;
  --comparing: #ff9800;
  --sorted: #2e7d32;
  --active: #000000;
  --swap: #c62828;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  background-color: #fff;
  color: #000;
  scroll-behavior: smooth;
  font-size: 20px;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body {
  position: relative;
  font-family: "Montserrat", sans-serif !important;
  font-size: 20px;
  background: var(--bg);
  color: #000;
  min-height: 100vh;
  overflow-x: hidden;
}

::selection {
  color: #fff;
  background: #000;
}

li { list-style: none; }

label {
  font-size: 70%;
  color: #616161;
}

li a { color: black; }
li a:hover { color: black; text-decoration: none; }

/* Navbar */
.algo-nav {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--card-border);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}
.algo-nav a {
  color: #000;
  text-decoration: none;
  font-weight: 400;
  font-size: 0.7rem;
  transition: 0.2s;
}
.algo-nav a:hover { color: #616161; text-decoration: none; }
.algo-nav .nav-title {
  font-size: 0.8rem;
  color: #000;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.algo-nav .nav-links { display: flex; gap: 1.5rem; align-items: center; }

/* Page Header */
.algo-header {
  text-align: center;
  padding: 2.5rem 1rem 1rem;
}
.algo-header h1 {
  font-size: 1.6rem;
  color: #000;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}
.algo-header p {
  color: #616161;
  font-size: 0.7rem;
  max-width: 700px;
  margin: 0 auto;
  font-weight: 300;
  font-family: averta_light, 'Montserrat', sans-serif;
}

/* Controls */
.controls {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  padding: 1rem;
  flex-wrap: wrap;
  align-items: center;
}
.controls button {
  padding: 5px 15px;
  border: 1px solid #979797;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 400;
  font-size: 0.65rem;
  transition: all 0.2s ease-in-out;
  font-family: 'Montserrat', sans-serif;
  background: transparent;
  color: #000;
}
.btn-primary-algo {
  background: #000;
  color: #fff;
  border-color: #000;
}
.btn-primary-algo:hover { background: #333; border-color: #333; }
.btn-primary-algo:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-secondary-algo {
  background: transparent;
  color: #000;
  border: 1px solid #979797;
}
.btn-secondary-algo:hover { background: #000; color: #fff; border-color: #000; }
.btn-danger-algo {
  background: transparent;
  color: var(--danger);
  border-color: var(--danger);
}
.btn-danger-algo:hover { background: var(--danger); color: #fff; }

/* Speed & Size Controls */
.control-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.control-group label {
  font-size: 0.65rem;
  color: #616161;
  font-weight: 400;
}
.control-group input[type="range"] {
  width: 100px;
  accent-color: #000;
}
.control-group input[type="number"],
.control-group input[type="text"] {
  width: 70px;
  padding: 4px 6px;
  border-radius: 0;
  border: 1px solid #979797;
  background: #fff;
  color: #000;
  text-align: center;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.65rem;
}

/* Visualization Container */
.viz-container {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: 0;
  margin: 1rem auto;
  padding: 1.5rem;
  max-width: 1000px;
  min-height: 350px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 5px 15px 0 rgba(0, 0, 0, 0.08);
}

/* Bar chart styles for sorting */
.bars-container {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 2px;
  height: 300px;
  padding: 0 10px;
}
.bar {
  flex: 1;
  background: #000;
  border-radius: 2px 2px 0 0;
  transition: height 0.15s ease, background 0.15s ease;
  position: relative;
  max-width: 50px;
  min-width: 4px;
}
.bar.comparing { background: #ff9800; }
.bar.sorted { background: #2e7d32; }
.bar.active { background: #000; }
.bar.swap { background: #c62828; }
.bar.pivot { background: #1565c0; }
.bar-label {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.5rem;
  color: #616161;
}

/* Info Panel */
.info-panel {
  max-width: 1000px;
  margin: 1rem auto;
  padding: 1rem 1.5rem;
  background: #fff;
  border: 1px solid var(--card-border);
  box-shadow: 0 5px 15px 0 rgba(0, 0, 0, 0.08);
}
.info-panel h3 {
  color: #000;
  margin-bottom: 0.5rem;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.info-panel .complexity {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.info-panel .complexity div {
  background: var(--light);
  padding: 5px 10px;
  border-radius: 0;
  font-size: 0.65rem;
  color: #333;
  font-family: averta_light, 'Montserrat', sans-serif;
}
.info-panel .complexity span {
  color: #000;
  font-weight: 700;
}

/* Status bar */
.status-bar {
  text-align: center;
  padding: 0.5rem;
  font-size: 0.7rem;
  color: #616161;
  min-height: 2rem;
  font-weight: 400;
}

/* Grid for graph/pathfinding */
.grid-container {
  display: inline-grid;
  gap: 1px;
  margin: 0 auto;
}
.grid-cell {
  width: 28px;
  height: 28px;
  background: #f5f5f5;
  border: 1px solid #e0e0e0;
  transition: background 0.15s;
  cursor: pointer;
}
.grid-cell.wall { background: #333; }
.grid-cell.visited { background: #bdbdbd; }
.grid-cell.path { background: #ff9800; }
.grid-cell.start { background: #2e7d32; }
.grid-cell.end { background: #c62828; }
.grid-cell.current { background: #000; }

/* Canvas for trees/graphs */
.canvas-container {
  display: flex;
  justify-content: center;
}
.canvas-container canvas {
  border-radius: 0;
}

/* Node styling for linked list / tree */
.node-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  min-height: 120px;
  padding: 1rem;
}
.node {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #000;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.7rem;
  transition: all 0.3s;
  position: relative;
}
.node.active { background: #616161; transform: scale(1.15); }
.node.visited { background: #2e7d32; }
.node.found { background: #ff9800; color: #000; }
.node-arrow {
  color: #000;
  font-size: 1.2rem;
}

/* Stack / Queue visual */
.stack-container, .queue-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-height: 300px;
  justify-content: flex-end;
}
.queue-container {
  flex-direction: row;
  justify-content: center;
  align-items: center;
  min-height: 80px;
}
.stack-item, .queue-item {
  padding: 8px 20px;
  background: #000;
  color: #fff;
  border-radius: 0;
  font-weight: 600;
  animation: slideIn 0.3s ease;
  min-width: 70px;
  text-align: center;
  font-size: 0.7rem;
}
.stack-item.active, .queue-item.active {
  background: #616161;
}

/* Hash table */
.hash-table {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}
.hash-bucket {
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 0;
  padding: 0.5rem;
  min-width: 70px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.hash-bucket .bucket-index {
  color: #616161;
  font-size: 0.55rem;
  margin-bottom: 0.3rem;
  font-weight: 600;
}
.hash-bucket .bucket-items {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hash-bucket .bucket-item {
  background: #000;
  color: #fff;
  border-radius: 2px;
  padding: 2px 6px;
  font-size: 0.6rem;
}
.hash-bucket.active { border-color: #000; border-width: 2px; }

/* DP Table */
.dp-table {
  display: inline-grid;
  gap: 2px;
  margin: 0 auto;
}
.dp-cell {
  width: 40px;
  height: 40px;
  background: #f5f5f5;
  border: 1px solid #e0e0e0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  transition: all 0.3s;
  border-radius: 0;
  color: #333;
}
.dp-cell.active { background: #000; color: #fff; }
.dp-cell.computed { background: #e8f5e9; color: #2e7d32; }
.dp-cell.header { background: #eeeeee; color: #000; font-weight: 700; }

/* Code display */
.code-panel {
  max-width: 1000px;
  margin: 1rem auto;
  background: #fafafa;
  border: 1px solid var(--card-border);
  overflow: hidden;
  box-shadow: 0 5px 15px 0 rgba(0, 0, 0, 0.08);
}
.code-panel-header {
  padding: 5px 10px;
  background: #f5f5f5;
  color: #000;
  font-weight: 600;
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--card-border);
}
.code-panel pre {
  padding: 15px;
  margin: 0;
  font-size: 0.65rem;
  line-height: 1.6;
  overflow-x: auto;
  color: #333;
  font-family: 'Courier New', Courier, monospace;
}
.code-panel pre .highlight-line {
  background: rgba(0, 0, 0, 0.06);
  display: block;
  margin: 0 -1rem;
  padding: 0 1rem;
  border-left: 3px solid #000;
}

/* Animations */
@keyframes slideIn {
  from { transform: translateY(-20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

/* Index page cards */
.algo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  padding: 1rem 2rem 3rem;
  max-width: 1200px;
  margin: 0 auto;
}
.algo-card {
  background: #fff;
  border: none;
  padding: 1.5rem;
  transition: all 0.3s ease-in-out;
  text-decoration: none;
  color: inherit;
  display: block;
  box-shadow: 0 5px 15px 0 rgba(0, 0, 0, 0.08);
  cursor: pointer;
}
.algo-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  text-decoration: none;
  color: inherit;
  border: 1px solid #000;
}
.algo-card h3 {
  color: #000;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
}
.algo-card p {
  color: #616161;
  font-size: 0.65rem;
  margin: 0;
  font-weight: 300;
  font-family: averta_light, 'Montserrat', sans-serif;
}
.algo-card .card-tag {
  display: inline-block;
  background: transparent;
  color: #000;
  padding: 2px 8px;
  border: 1px solid #000;
  border-radius: 0;
  font-size: 0.5rem;
  margin-top: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Category heading */
.category-heading {
  max-width: 1200px;
  margin: 2.5rem auto 0.75rem;
  padding: 0 2rem;
  font-size: 1rem;
  color: #000;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.category-heading::after {
  display: block;
  height: 2px;
  background-color: #000;
  content: "";
  width: 60px;
  margin-top: 8px;
}

/* Responsive */
@media (max-width: 768px) {
  .algo-nav { padding: 0.75rem 1rem; }
  .algo-header h1 { font-size: 1.2rem; }
  .viz-container { margin: 0.5rem; padding: 1rem; }
  .controls { gap: 0.5rem; }
  .algo-grid { padding: 1rem; }
  .bars-container { height: 200px; }
  .info-panel { margin: 0.5rem; }
  .algo-nav .nav-links { gap: 0.5rem; font-size: 0.6rem; }
}