:root {
  --bg: #0b0f1a;
  --bg-2: #121a2b;
  --card: rgba(255, 255, 255, 0.08);
  --card-strong: rgba(255, 255, 255, 0.12);
  --text: #e6edf7;
  --muted: #9fb0c7;
  --accent: #54d2ff;
  --accent-2: #ff7aa2;
  --accent-3: #ffd76a;
  --success: #77f2c0;
  --danger: #ff6b6b;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 10% -10%, #1b3a6b 0%, transparent 60%),
              radial-gradient(900px 500px at 90% 0%, #4c1c5a 0%, transparent 60%),
              linear-gradient(180deg, var(--bg) 0%, #070a12 100%);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

header {
  padding: 36px 6vw 20px;
}

.title {
  display: flex;
  align-items: flex-end;
  gap: 18px;
  flex-wrap: wrap;
}

.title h1 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 3rem);
  letter-spacing: -0.02em;
}

.title p {
  margin: 0;
  color: var(--muted);
  max-width: 640px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(84, 210, 255, 0.15);
  border: 1px solid rgba(84, 210, 255, 0.35);
  border-radius: 999px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

main {
  display: grid;
  grid-template-columns: minmax(260px, 320px) 1fr;
  gap: 28px;
  padding: 0 6vw 60px;
}

.panel {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 22px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.controls {
  display: grid;
  gap: 18px;
}

.control-group {
  display: grid;
  gap: 8px;
}

.control-group label {
  font-size: 0.9rem;
  color: var(--muted);
}

.range-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.range-wrap input[type="range"] {
  flex: 1;
}

.value-pill {
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 0.85rem;
}

.button-row {
  display: grid;
  gap: 10px;
}

button {
  border: none;
  border-radius: 12px;
  padding: 12px 14px;
  font-family: inherit;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent), #8ef1ff);
  color: #031022;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 10px 18px rgba(84, 210, 255, 0.25);
}

button.secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  box-shadow: none;
}

button.danger {
  background: linear-gradient(135deg, #ff7a7a, #ffb199);
  color: #2b0707;
}

button:hover {
  transform: translateY(-1px);
}

.toggle-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.toggle-row input[type="checkbox"] {
  transform: scale(1.1);
}

.algorithms-list {
  display: grid;
  gap: 10px;
  max-height: 320px;
  overflow: auto;
  padding-right: 4px;
}

.algorithms-list label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid transparent;
  cursor: pointer;
}

.algorithms-list label.active {
  border-color: rgba(84, 210, 255, 0.6);
  background: rgba(84, 210, 255, 0.12);
}

.algorithms-list span {
  font-size: 0.9rem;
}

.stage {
  display: grid;
  gap: 20px;
}

.stage-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.stage-header h2 {
  margin: 0;
}

.stats {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.stat-pill {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.85rem;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.algo-card {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 14px;
  display: grid;
  gap: 10px;
  box-shadow: var(--shadow);
}

.algo-card header {
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.algo-card h3 {
  margin: 0;
  font-size: 1rem;
}

.algo-card small {
  color: var(--muted);
}

canvas {
  width: 100%;
  height: 180px;
  border-radius: 12px;
  background: rgba(2, 6, 20, 0.6);
}

.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--muted);
}

.tag {
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.1);
}

.tag.done {
  background: rgba(119, 242, 192, 0.2);
  color: var(--success);
}

.tag.running {
  background: rgba(255, 215, 106, 0.2);
  color: var(--accent-3);
}

.tag.error {
  background: rgba(255, 122, 162, 0.2);
  color: var(--accent-2);
}

.footer {
  padding: 20px 6vw 40px;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 980px) {
  main {
    grid-template-columns: 1fr;
  }
}