:root {
  --bg-color: #050505;
  --text-color: #f5f5f5;
  --text-secondary: #9ca3af;
  --border-color: #262626;
  --grid-color: rgba(255, 255, 255, 0.04);
  --accent-color: #ff3366; /* Vibrant magenta for data vis */
  --accent-glow: rgba(255, 51, 102, 0.25);
  --card-bg: #0f0f0f;
  --btn-bg: #e5e5e5;
  --btn-text: #050505;
  --btn-hover: #ffffff;
  --shadow-color: rgba(0, 0, 0, 0.9);
}

[data-theme='light'] {
  --bg-color: #f8fafc;
  --text-color: #0f172a;
  --text-secondary: #475569;
  --border-color: #cbd5e1;
  --grid-color: rgba(0, 0, 0, 0.04);
  --accent-color: #0284c7; /* Vibrant rich blue */
  --accent-glow: rgba(2, 132, 199, 0.15);
  --card-bg: #ffffff;
  --btn-bg: #0f172a;
  --btn-text: #ffffff;
  --btn-hover: #000000;
  --shadow-color: rgba(0, 0, 0, 0.08);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.4;
  overflow-x: hidden;
  transition: background-color 0.3s, color 0.3s;
  
  /* Vercel-like Grid Background */
  background-image: 
    linear-gradient(to right, var(--grid-color) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-color) 1px, transparent 1px);
  background-size: 30px 30px;
  background-position: center top;
}

/* Navbar */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(var(--bg-color), 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-container img {
  height: 28px;
}

.logo-container span {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text-color);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.theme-toggle:hover {
  background: var(--card-bg);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 1.5rem 0.5rem 1rem;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

#logo-3d-container {
  width: 100%;
  height: 280px;
  max-width: 320px;
  margin: 0 auto 1rem auto;
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  cursor: grab;
  /* Add subtle background glow */
  background: radial-gradient(circle, rgba(255,255,255,0.03) 0%, transparent 70%);
}

#logo-3d-container:active {
  cursor: grabbing;
}

.hero::before {
  content: '';
  position: absolute;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 250px;
  height: 250px;
  background: var(--accent-glow);
  filter: blur(80px);
  z-index: -1;
  border-radius: 50%;
}

.hero h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1.05;
  margin-bottom: 1rem;
  background: linear-gradient(to right, var(--text-color), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 1.5rem;
}

/* Download Section */
.download-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.btn-primary {
  background-color: var(--btn-bg);
  color: var(--btn-text);
  border: none;
  padding: 0.6rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  transition: transform 0.2s, background-color 0.2s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary:hover {
  background-color: var(--btn-hover);
  transform: translateY(-2px);
}

.specs {
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

.specs span {
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  background-color: var(--card-bg);
}

/* Showcase (Overlapping Images) */
.showcase-container {
  max-width: 1000px;
  margin: 0 auto 3rem;
  padding: 0 1rem;
  position: relative;
  height: 450px;
  display: flex;
  justify-content: center;
  perspective: 1200px;
}

.showcase-img {
  position: absolute;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  box-shadow: 0 15px 35px var(--shadow-color);
  transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.img-main {
  width: 700px;
  max-width: 100%;
  z-index: 2;
  top: 30px;
}

.img-left {
  width: 450px;
  left: 2%;
  top: 90px;
  z-index: 1;
  transform: rotateY(20deg) scale(0.85);
  opacity: 0.7;
}

.img-right {
  width: 450px;
  right: 2%;
  top: 120px;
  z-index: 3;
  transform: rotateY(-20deg) scale(0.9);
}

.showcase-container:hover .img-left {
  transform: rotateY(0deg) scale(0.85) translateX(-30px);
  opacity: 1;
}

.showcase-container:hover .img-right {
  transform: rotateY(0deg) scale(0.9) translateX(30px);
}

/* Features Grid */
.features {
  max-width: 1000px;
  margin: 0 auto 3rem;
  padding: 0 1rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 0.75rem;
  border-radius: 8px;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: var(--accent-color);
}

.card-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--accent-color);
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  padding: 0.75rem 0.5rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.8rem;
  background-color: var(--card-bg);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  gap: 1rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--text-color);
}

/* Responsive */
@media (max-width: 850px) {
  .showcase-container {
    height: 350px;
  }
  .img-main { width: 85%; left: 7.5%; }
  .img-left, .img-right { display: none; }
}

@media (max-width: 600px) {
  .hero h1 { font-size: 2rem; }
  .hero { padding: 2rem 1rem 1rem; }
  .showcase-container {
    height: auto;
    margin-bottom: 2rem;
    padding: 0 0.5rem;
  }
  .img-main { 
    position: static; 
    width: 100%; 
    box-shadow: 0 10px 20px var(--shadow-color);
  }
  .features { margin-bottom: 2rem; }
  .footer-content {
    flex-direction: column;
    gap: 0.75rem;
  }
  .grid {
    grid-template-columns: 1fr;
  }
}

/* Download Table */
.download-table-container {
  margin: 1rem auto;
  max-width: 800px;
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--card-bg);
}

.download-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.download-table th, .download-table td {
  padding: 0.4rem 0.6rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-color);
  font-size: 0.9rem;
}

.download-table th {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.85rem;
  background-color: rgba(255,255,255,0.02);
}

.download-table tr:last-child td {
  border-bottom: none;
}

.btn-table {
  background-color: var(--btn-bg);
  color: var(--btn-text);
  border: none;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: transform 0.2s, background-color 0.2s;
}

.btn-table:hover {
  background-color: var(--btn-hover);
}

.btn-table-outline {
  background-color: transparent;
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: border-color 0.2s;
}

.btn-table-outline:hover {
  border-color: var(--text-secondary);
}