/* ==============================================================================
   VisionEye Download Website Stylesheet
   Modern Cyberpunk Glassmorphism • Responsive • High-Tech Palette
   Domain: https://pvsairamsaketh.in
   ============================================================================== */

:root {
  --bg-primary: #070B13;
  --bg-secondary: #0D1321;
  --bg-card: rgba(13, 20, 36, 0.75);
  --bg-card-hover: rgba(19, 29, 52, 0.85);
  --bg-glass: rgba(13, 20, 36, 0.6);
  
  --accent-cyan: #00F0FF;
  --accent-emerald: #10B981;
  --accent-blue: #3B82F6;
  --accent-purple: #8B5CF6;
  --accent-amber: #F59E0B;
  --accent-rose: #F43F5E;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-cyan: rgba(0, 240, 255, 0.35);
  --border-emerald: rgba(16, 185, 129, 0.35);
  
  --text-main: #F1F5F9;
  --text-muted: #94A3B8;
  --text-dim: #64748B;
  
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --shadow-glow-cyan: 0 0 25px rgba(0, 240, 255, 0.3);
  --shadow-glow-emerald: 0 0 25px rgba(16, 185, 129, 0.3);
  --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 20% 15%, rgba(0, 240, 255, 0.07) 0%, transparent 40%),
    radial-gradient(circle at 80% 30%, rgba(16, 185, 129, 0.06) 0%, transparent 45%),
    radial-gradient(circle at 50% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
  background-attachment: fixed;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(7, 11, 19, 0.85);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1rem 0;
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: #fff;
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(16, 185, 129, 0.2));
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  box-shadow: var(--shadow-glow-cyan);
}

.brand-text h1 {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, #00F0FF, #10B981);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text span {
  font-size: 0.68rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  letter-spacing: 0.05em;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.nav-btn {
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid var(--border-cyan);
  color: var(--accent-cyan) !important;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-weight: 600 !important;
  font-size: 0.85rem !important;
  transition: all 0.2s ease !important;
}

.nav-btn:hover {
  background: var(--accent-cyan);
  color: #070B13 !important;
  box-shadow: var(--shadow-glow-cyan);
}

/* Hero Section */
.hero {
  padding: 5rem 0 3rem;
  text-align: center;
  position: relative;
}

.badge-version {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-cyan);
  margin-bottom: 1.5rem;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero-gradient {
  background: linear-gradient(135deg, #FFFFFF 20%, #00F0FF 60%, #10B981 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 2.5rem;
  line-height: 1.6;
}

/* Primary Detected Download CTA */
.download-cta-box {
  background: var(--bg-card);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  max-width: 680px;
  margin: 0 auto 3.5rem;
  box-shadow: var(--shadow-card), var(--shadow-glow-cyan);
  backdrop-filter: blur(12px);
  text-align: center;
}

.detected-header {
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  letter-spacing: 0.06em;
}

.detected-platform-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
}

.btn-download-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: linear-gradient(135deg, #00F0FF 0%, #10B981 100%);
  color: #070B13;
  font-size: 1.15rem;
  font-weight: 700;
  padding: 1rem 2.5rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  box-shadow: 0 4px 25px rgba(0, 240, 255, 0.4);
  transition: all 0.25s ease;
  width: 100%;
  max-width: 440px;
}

.btn-download-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 35px rgba(0, 240, 255, 0.6);
  filter: brightness(1.08);
}

.download-meta {
  margin-top: 1rem;
  font-size: 0.78rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.download-meta span {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* App Hero Screenshot / Preview */
.hero-preview {
  margin-top: 3rem;
  position: relative;
  border-radius: var(--radius-lg);
  padding: 8px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.4), rgba(16, 185, 129, 0.2), rgba(255, 255, 255, 0.05));
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
}

.hero-preview-inner {
  border-radius: calc(var(--radius-lg) - 6px);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border-subtle);
}

.hero-preview img {
  width: 100%;
  height: auto;
  display: block;
}

/* Section Common */
.section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  display: inline-block;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0.75rem auto 0;
}

/* Multi-Platform Download Matrix Cards */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.platform-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.25s ease;
}

.platform-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-cyan);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-card);
}

.platform-icon {
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--accent-cyan);
  border: 1px solid var(--border-subtle);
}

.platform-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.platform-arch {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  margin-bottom: 1rem;
}

.platform-specs {
  list-style: none;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.platform-specs li {
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.btn-platform-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.7rem 1.2rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all 0.2s ease;
  width: 100%;
}

.btn-platform-download:hover {
  background: var(--accent-cyan);
  color: #070B13;
  border-color: var(--accent-cyan);
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all 0.25s ease;
}

.feature-card:hover {
  border-color: rgba(0, 240, 255, 0.3);
  transform: translateY(-3px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.icon-cyan { background: rgba(0, 240, 255, 0.1); color: var(--accent-cyan); border: 1px solid var(--border-cyan); }
.icon-emerald { background: rgba(16, 185, 129, 0.1); color: var(--accent-emerald); border: 1px solid var(--border-emerald); }
.icon-purple { background: rgba(139, 92, 246, 0.1); color: var(--accent-purple); border: 1px solid rgba(139, 92, 246, 0.35); }
.icon-amber { background: rgba(245, 158, 11, 0.1); color: var(--accent-amber); border: 1px solid rgba(245, 158, 11, 0.35); }

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Installation Guide Tabs */
.install-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 860px;
  margin: 0 auto;
}

.tab-nav {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
}

.tab-btn.active {
  background: rgba(0, 240, 255, 0.12);
  color: var(--accent-cyan);
  border-color: var(--border-cyan);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.step-list {
  list-style: none;
}

.step-item {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.step-number {
  width: 32px;
  height: 32px;
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid var(--border-cyan);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.step-text h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.step-text p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.code-block {
  background: #04070D;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-cyan);
  margin-top: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* System Requirements Table */
.specs-table-box {
  max-width: 860px;
  margin: 0 auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

.specs-table th {
  background: rgba(255, 255, 255, 0.03);
  padding: 1rem 1.25rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-subtle);
}

.specs-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

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

.specs-table td strong {
  color: #fff;
}

/* Checksums Section */
.checksum-box {
  background: #04070D;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  max-width: 860px;
  margin: 1.5rem auto 0;
  overflow-x: auto;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 3.5rem 0 2rem;
  background: rgba(4, 7, 13, 0.95);
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

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

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

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.25rem;
  }
  .nav-links {
    display: none;
  }
  .download-cta-box {
    padding: 1.5rem;
  }
}