/* 
 * ANTI-SLOP UI FRAMEWORK
 * School: Vercel Minimalism
 * Layers: Pure Black, Glassmorphism, Micro-interactions, CSS Animations
 */

:root {
  --bg-primary: #000000;
  --bg-secondary: #0A0A0A;
  --bg-tertiary: #111111;
  
  --text-primary: #EDEDED;
  --text-secondary: #A1A1AA;
  --text-muted: #71717A;
  
  --border-color: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(255, 255, 255, 0.2);
  
  --accent-color: #EDEDED;
  --accent-glow: rgba(237, 237, 237, 0.15);
  
  --font-sans: 'Inter', -apple-system, sans-serif;
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 24px;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Background Effects */
.background-glow {
  position: fixed;
  top: -20vh;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: 50vh;
  background: radial-gradient(circle, rgba(255,255,255,0.03) 0%, rgba(0,0,0,0) 70%);
  z-index: -2;
  pointer-events: none;
}

.noise-overlay {
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.05'/%3E%3C/svg%3E");
  z-index: -1;
  pointer-events: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.glass-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-text {
  background: linear-gradient(180deg, #FFFFFF 0%, #A1A1AA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.links a:not(.btn) {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.links a:not(.btn):hover, .links a.active {
  color: var(--text-primary);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  height: 36px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: 1px solid transparent;
  gap: 8px;
}

.btn.lg {
  height: 44px;
  padding: 0 24px;
  font-size: 1rem;
}

.btn.primary {
  background: var(--text-primary);
  color: var(--bg-primary);
}

.btn.primary:hover {
  background: #ffffff;
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn.secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn.secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-hover);
}

/* Hero Section with Split Layout */
.hero {
  padding: 80px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

h1 {
  font-size: 4rem;
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 24px;
}

.gradient-text {
  background: linear-gradient(180deg, #FFFFFF 0%, #A1A1AA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.cta-group {
  display: flex;
  gap: 16px;
}

/* Layer Animation Visualization */
.layer-animation-container {
  position: relative;
  width: 100%;
  height: 400px;
  perspective: 1000px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.stack-layer {
  position: absolute;
  width: 300px;
  height: 200px;
  border-radius: var(--radius-md);
  background: rgba(10, 10, 10, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-hover);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  transform-style: preserve-3d;
  animation: stackFloat 10s infinite alternate ease-in-out;
}

.layer-label {
  position: absolute;
  top: 12px;
  left: 16px;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.layer-a { transform: translateY(80px) translateZ(-80px) rotateX(20deg); animation-delay: 0s; }
.layer-b { transform: translateY(40px) translateZ(-40px) rotateX(20deg); animation-delay: -2s; border-color: rgba(255,255,255,0.3); }
.layer-c { transform: translateY(0px) translateZ(0px) rotateX(20deg); animation-delay: -4s; border-color: rgba(255,255,255,0.4); }
.layer-d { transform: translateY(-40px) translateZ(40px) rotateX(20deg); animation-delay: -6s; border-color: rgba(255,255,255,0.5); }
.layer-e { transform: translateY(-80px) translateZ(80px) rotateX(20deg); animation-delay: -8s; border-color: rgba(255,255,255,0.7); }

@keyframes stackFloat {
  0% { transform: translateY(var(--ty, 0)) translateZ(var(--tz, 0)) rotateX(20deg) scale(0.95); }
  100% { transform: translateY(calc(var(--ty, 0) - 20px)) translateZ(calc(var(--tz, 0) + 20px)) rotateX(25deg) scale(1.05); }
}

.layer-a { --ty: 80px; --tz: -80px; }
.layer-b { --ty: 40px; --tz: -40px; }
.layer-c { --ty: 0px; --tz: 0px; }
.layer-d { --ty: -40px; --tz: 40px; }
.layer-e { --ty: -80px; --tz: 80px; }

/* Internal layer elements */
.wireframe-grid { display: flex; gap: 8px; width: 60%; height: 40%; }
.wf-box { flex: 1; border: 1px dashed var(--text-muted); border-radius: 4px; }
.wf-text { font-size: 3rem; font-family: serif; color: var(--text-secondary); }
.wf-button { width: 120px; height: 36px; background: var(--text-secondary); border-radius: 99px; }
.wf-glow { width: 80px; height: 80px; border-radius: 50%; background: radial-gradient(circle, rgba(255,255,255,0.5) 0%, rgba(255,255,255,0) 70%); }
.wf-physics { color: var(--text-primary); width: 80%; }

/* Features Grid */
.features {
  padding: 80px 24px;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 32px;
  border-radius: var(--radius-md);
}
.feature-icon {
  width: 32px;
  height: 32px;
  color: var(--text-primary);
  margin-bottom: 24px;
}
.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 12px;
}
.feature-card p {
  color: var(--text-secondary);
}

/* Support & Author Section */
.support {
  padding: 0 24px 80px;
}
.support-content {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding: 40px;
  border-radius: var(--radius-lg);
  max-width: 800px;
  margin: 0 auto;
}
.author-badge {
  display: flex;
  align-items: center;
  gap: 24px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 32px;
}
.author-img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
}
.author-badge h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.author-badge p {
  color: var(--text-secondary);
  font-size: 1rem;
}
.donation-box h4 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.donation-box p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 0.95rem;
}
.crypto-address {
  background: var(--bg-primary);
  padding: 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: inline-block;
}
.crypto-address code {
  font-family: 'Courier New', Courier, monospace;
  color: var(--text-primary);
  word-break: break-all;
}

/* Page Headers (for subpages) */
.page-content {
  padding: 80px 24px;
  flex: 1;
}

.page-header {
  margin-bottom: 48px;
  max-width: 800px;
}

.page-header h1 {
  font-size: 3rem;
  margin-bottom: 16px;
}

.page-header p {
  font-size: 1.2rem;
  color: var(--text-secondary);
}

.paper-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
}

.paper-container {
  padding: 48px;
}

/* Grids & Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  background: var(--bg-tertiary);
  box-shadow: 0 12px 24px rgba(0,0,0,0.4);
}

.card h3 {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 40px 24px;
  overflow-y: auto;
}

.glass-panel {
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-hover);
}

.modal-content {
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 48px rgba(0,0,0,0.5);
  position: relative;
}

.modal-header {
  padding: 24px 32px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
}

.close-btn:hover { color: var(--text-primary); }

.close-modal {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 28px;
  cursor: pointer;
  color: var(--text-secondary);
}
.close-modal:hover { color: var(--text-primary); }

.code-block {
  margin-top: 24px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 16px;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.code-block code {
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.5;
  word-wrap: break-word;
}

.modal-body {
  padding: 32px;
  color: var(--text-secondary);
}

.modal-body h1, .modal-body h2, .modal-body h3 {
  color: var(--text-primary);
  margin: 32px 0 16px;
}
.modal-body h1 { font-size: 2rem; margin-top: 0; }
.modal-body pre {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  overflow-x: auto;
  margin: 24px 0;
}

/* Markdown parsing inside paper and modal */
#paper-content h1, #paper-content h2, #paper-content h3 {
  color: var(--text-primary);
  margin-top: 32px;
  margin-bottom: 16px;
}
#paper-content p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 1.1rem;
  line-height: 1.8;
}
#paper-content ul {
  margin-left: 24px;
  margin-bottom: 16px;
  color: var(--text-secondary);
}

footer {
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  margin-top: auto;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Responsive constraints to prevent overlapping */
@media (max-width: 900px) {
  .split-layout { grid-template-columns: 1fr; gap: 40px; }
  .feature-grid { grid-template-columns: 1fr; }
  h1 { font-size: 3rem; }
  .layer-animation-container { transform: scale(0.8); }
}

@media (max-width: 600px) {
  .links { display: none; }
  .mobile-menu-btn { display: block; }
  .footer-content { flex-direction: column; gap: 16px; text-align: center; }
  .modal { padding: 16px; }
  .paper-container { padding: 24px; }
  .layer-animation-container { transform: scale(0.6); }
}

/* Install Modal Specific */
.install-modal {
  max-width: 520px;
  margin: auto;
  padding: 32px;
  text-align: center;
}
.modal-header-simple {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
}
.modal-icon {
  color: var(--text-primary);
  opacity: 0.8;
}
.modal-header-simple h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
}
.modal-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 24px;
  line-height: 1.5;
}
.install-code-container {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 8px 8px 8px 16px;
  border-radius: var(--radius-sm);
  transition: border-color 0.2s;
}
.install-code-container:hover {
  border-color: var(--border-hover);
}
.code-scroll-area {
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none; /* Firefox */
  text-align: left;
}
.code-scroll-area::-webkit-scrollbar {
  display: none; /* Chrome/Safari */
}
.code-scroll-area code {
  color: var(--text-primary);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
}
.copy-btn-small {
  padding: 0 16px;
  height: 32px;
  font-size: 0.85rem;
  flex-shrink: 0;
}

#install-modal { align-items: center; justify-content: center; }