@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;700&display=swap');

:root {
  --bg-color: #0d1117;
  --text-color: #c9d1d9;
  --accent-blue: #58a6ff;
  --accent-pink: #ff7b72;
  --accent-green: #3fb950;
  --accent-purple: #bc8cff;
  --accent-orange: #e3b341;
  --glass-bg: rgba(22, 27, 34, 0.7);
  --glass-border: rgba(48, 54, 61, 0.5);
  --radius: 16px;
}

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

body {
  font-family: 'Outfit', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Background Glow Effects */
.glow-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(circle at 20% 30%, rgba(88, 166, 255, 0.15) 0%, transparent 40%),
              radial-gradient(circle at 80% 70%, rgba(255, 123, 114, 0.15) 0%, transparent 40%);
}

#app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  text-align: center;
  padding: 4rem 2rem 2rem;
}

header h1 {
  font-size: 3.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
}

header p {
  font-size: 1.2rem;
  opacity: 0.8;
  max-width: 600px;
  margin: 0 auto;
}

main {
  display: flex;
  flex: 1;
  padding: 2rem;
  gap: 2rem;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.content-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  overflow-y: auto;
  padding-right: 1rem;
  /* hide scrollbar */
  scrollbar-width: thin;
  scrollbar-color: var(--accent-blue) transparent;
}

.content-pane::-webkit-scrollbar {
  width: 6px;
}

.content-pane::-webkit-scrollbar-thumb {
  background-color: var(--accent-blue);
  border-radius: 10px;
}

.card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 2rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.card:hover, .card.active {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(88, 166, 255, 0.2);
  border-color: rgba(88, 166, 255, 0.5);
}

.card h2 {
  font-size: 1.8rem;
  color: #fff;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card p {
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.card ul {
  list-style-position: inside;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.card strong {
  color: #fff;
}

.highlight-blue { color: var(--accent-blue); }
.highlight-pink { color: var(--accent-pink); }
.highlight-green { color: var(--accent-green); }
.highlight-orange { color: var(--accent-orange); }

.formula {
  background: rgba(0,0,0,0.5);
  font-family: monospace;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  display: inline-block;
  margin: 0.5rem 0;
  font-size: 1.2rem;
  color: var(--accent-purple);
}

.visual-pane {
  flex: 1;
  position: sticky;
  top: 2rem;
  height: calc(100vh - 4rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 2rem;
}

.canvas-container {
  width: 100%;
  aspect-ratio: 1/1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

canvas {
  width: 100%;
  height: 100%;
  max-width: 500px;
  max-height: 500px;
}

.controls {
  margin-top: 2rem;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: rgba(0, 0, 0, 0.3);
  padding: 1.5rem;
  border-radius: 12px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.control-group label {
  font-weight: 600;
  display: flex;
  justify-content: space-between;
}

input[type=range] {
  -webkit-appearance: none;
  width: 100%;
  background: transparent;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  height: 20px;
  width: 20px;
  border-radius: 50%;
  background: var(--accent-blue);
  cursor: pointer;
  margin-top: -8px;
  box-shadow: 0 0 10px var(--accent-blue);
}

input[type=range]::-webkit-slider-runnable-track {
  width: 100%;
  height: 4px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
}

.btn-animate {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  color: #fff;
  border: none;
  padding: 0.8rem 1.5rem;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-animate:hover {
  transform: scale(1.05);
  box-shadow: 0 0 15px var(--accent-purple);
}

.btn-animate:active {
  transform: scale(0.95);
}

.info-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}

.badge-deg { background: rgba(88, 166, 255, 0.2); color: var(--accent-blue); }
.badge-rad { background: rgba(255, 123, 114, 0.2); color: var(--accent-pink); }
.badge-sin { background: rgba(63, 185, 80, 0.2); color: var(--accent-green); }

@media (max-width: 1024px) {
  main {
    flex-direction: column;
  }
  .visual-pane {
    position: relative;
    top: 0;
    height: auto;
    min-height: 60vh;
  }
}