/* ==========================================================================
   ASYMPTOTIC X LABS - RESEARCH | MONOCHROME STYLESHEET
   Design System: Stark Minimalist Black & White, Technical Research Lab
   ========================================================================== */

:root {
  /* Default: Obsidian Void (Dark Mode) */
  --bg: #09090b;
  --bg-subtle: #121215;
  --card-bg: #111114;
  --card-hover: #18181c;
  --fg: #fafafa;
  --fg-secondary: #a1a1aa;
  --fg-muted: #71717a;
  --border: #27272a;
  --border-light: #1f1f23;
  --border-strong: #3f3f46;
  --accent: #ffffff;
  --accent-contrast: #000000;
  --code-bg: #141418;
  --badge-bg: rgba(255, 255, 255, 0.08);
  --pulse-dot: #ffffff;
  --grid-line: rgba(255, 255, 255, 0.035);
  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", Menlo, Consolas, monospace;
  --font-math: "KaTeX_Math", "Cambria Math", "Times New Roman", serif;
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="paper"] {
  /* Stark Paper White (Light Mode) */
  --bg: #ffffff;
  --bg-subtle: #f8f9fa;
  --card-bg: #ffffff;
  --card-hover: #f4f4f5;
  --fg: #09090b;
  --fg-secondary: #52525b;
  --fg-muted: #71717a;
  --border: #e4e4e7;
  --border-light: #f4f4f5;
  --border-strong: #d4d4d8;
  --accent: #000000;
  --accent-contrast: #ffffff;
  --code-bg: #f4f4f5;
  --badge-bg: rgba(0, 0, 0, 0.06);
  --pulse-dot: #000000;
  --grid-line: rgba(0, 0, 0, 0.035);
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg);
  color: var(--fg);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image: 
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: -1px -1px;
}

/* Typography Utilities */
.mono {
  font-family: var(--font-mono);
}

.math-symbol {
  font-family: var(--font-math);
  font-style: italic;
}

a {
  color: var(--fg);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--fg-secondary);
}

/* Layout Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(9, 9, 11, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

[data-theme="paper"] .header-nav {
  background-color: rgba(255, 255, 255, 0.88);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-glyph {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--border-strong);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  background: var(--bg-subtle);
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  padding: 2px 6px;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--fg-secondary);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--fg);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 6px 10px;
  background: var(--bg-subtle);
  color: var(--fg-secondary);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}

.theme-toggle-btn:hover {
  border-color: var(--border-strong);
  color: var(--fg);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  background-color: var(--accent);
  color: var(--accent-contrast);
  border: 1px solid var(--accent);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary:hover {
  opacity: 0.88;
  color: var(--accent-contrast);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  background-color: transparent;
  color: var(--fg);
  border: 1px solid var(--border-strong);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-outline:hover {
  border-color: var(--fg);
  background-color: var(--bg-subtle);
}

/* Hero Section */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
  border-bottom: 1px solid var(--border);
}

.hero-header-line {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.hero-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 4px 10px;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  color: var(--fg-secondary);
}

.pulse-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--pulse-dot);
  box-shadow: 0 0 8px var(--pulse-dot);
  animation: pulseAnim 2s infinite;
}

@keyframes pulseAnim {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
  max-width: 960px;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  color: var(--fg-secondary);
  line-height: 1.5;
  max-width: 820px;
  margin-bottom: 36px;
  font-weight: 400;
}

.hero-math-banner {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-muted);
  border-left: 2px solid var(--border-strong);
  padding-left: 16px;
  margin-bottom: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}

/* Interactive Visualizer Canvas Section */
.visualizer-wrapper {
  margin-top: 40px;
  border: 1px solid var(--border);
  background-color: var(--card-bg);
  position: relative;
  overflow: hidden;
}

.visualizer-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  background-color: var(--bg-subtle);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.vis-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.vis-modes {
  display: flex;
  align-items: center;
  gap: 6px;
}

.vis-mode-btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 4px 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg-muted);
  cursor: pointer;
  transition: var(--transition);
}

.vis-mode-btn:hover {
  color: var(--fg);
  border-color: var(--border-strong);
}

.vis-mode-btn.active {
  background-color: var(--accent);
  color: var(--accent-contrast);
  border-color: var(--accent);
  font-weight: 600;
}

.vis-canvas-container {
  position: relative;
  width: 100%;
  height: 380px;
  background-color: var(--card-bg);
  cursor: crosshair;
}

canvas#researchCanvas {
  display: block;
  width: 100%;
  height: 100%;
}

.canvas-overlay-stats {
  position: absolute;
  bottom: 12px;
  right: 16px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--fg-muted);
  background: rgba(9, 9, 11, 0.75);
  padding: 4px 8px;
  border: 1px solid var(--border);
  pointer-events: none;
}

[data-theme="paper"] .canvas-overlay-stats {
  background: rgba(255, 255, 255, 0.85);
}

/* Telemetry Ribbon */
.telemetry-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--border);
  background-color: var(--bg);
}

.telemetry-item {
  padding: 20px 24px;
  border-right: 1px solid var(--border);
}

.telemetry-item:last-child {
  border-right: none;
}

.telemetry-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--fg-muted);
  margin-bottom: 6px;
}

.telemetry-value {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg);
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.telemetry-sub {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--fg-secondary);
}

/* Section Common */
.section {
  padding: 90px 0;
  border-bottom: 1px solid var(--border);
}

.section-header {
  margin-bottom: 50px;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 14px;
}

.section-description {
  font-size: 1.05rem;
  color: var(--fg-secondary);
  max-width: 680px;
}

/* Research Pillars Grid */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.pillar-card {
  border: 1px solid var(--border);
  background-color: var(--card-bg);
  padding: 36px;
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.pillar-card:hover {
  border-color: var(--border-strong);
  background-color: var(--card-hover);
  transform: translateY(-2px);
}

.pillar-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--fg-muted);
  margin-bottom: 20px;
}

.pillar-title {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  line-height: 1.25;
}

.pillar-body {
  font-size: 0.92rem;
  color: var(--fg-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}

.pillar-specs {
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  border-top: 1px solid var(--border-light);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--fg-muted);
}

.pillar-specs li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pillar-specs li::before {
  content: "→";
  color: var(--fg-secondary);
}

/* Technical Interactive Console / Terminal */
.terminal-wrapper {
  border: 1px solid var(--border-strong);
  background-color: #0c0c0e;
  color: #ededed;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

[data-theme="paper"] .terminal-wrapper {
  background-color: #141416;
  color: #f4f4f4;
}

.terminal-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background-color: #16161a;
  border-bottom: 1px solid #282830;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.terminal-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #333339;
}

.terminal-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  min-height: 280px;
  max-height: 380px;
  overflow-y: auto;
}

.terminal-line {
  margin-bottom: 6px;
  white-space: pre-wrap;
}

.terminal-line.cmd-prompt {
  color: #888888;
}

.terminal-line.cmd-echo {
  color: #ffffff;
  font-weight: 600;
}

.terminal-line.cmd-result {
  color: #cccccc;
}

.terminal-input-row {
  display: flex;
  align-items: center;
  padding: 12px 18px;
  background-color: #101014;
  border-top: 1px solid #282830;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.terminal-prompt-sym {
  color: #888888;
  margin-right: 10px;
  user-select: none;
}

.terminal-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.terminal-quick-cmds {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.quick-cmd-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 4px 10px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  color: var(--fg-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.quick-cmd-btn:hover {
  border-color: var(--border-strong);
  color: var(--fg);
}

/* Publications Section */
.publications-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
}

.filter-tabs {
  display: flex;
  gap: 8px;
}

.filter-tab {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 6px 12px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--fg-muted);
  cursor: pointer;
  transition: var(--transition);
}

.filter-tab:hover {
  color: var(--fg);
}

.filter-tab.active {
  border-color: var(--border-strong);
  color: var(--fg);
  background: var(--bg-subtle);
}

.papers-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.paper-item {
  border: 1px solid var(--border);
  background-color: var(--card-bg);
  padding: 24px 28px;
  transition: var(--transition);
}

.paper-item:hover {
  border-color: var(--border-strong);
  background-color: var(--card-hover);
}

.paper-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--fg-muted);
  margin-bottom: 8px;
}

.paper-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
  line-height: 1.35;
}

.paper-authors {
  font-size: 0.85rem;
  color: var(--fg-secondary);
  margin-bottom: 12px;
}

.paper-abstract {
  font-size: 0.88rem;
  color: var(--fg-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.paper-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-light);
  padding-top: 12px;
}

.paper-metrics-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.paper-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  background: var(--badge-bg);
  border: 1px solid var(--border);
  color: var(--fg-secondary);
}

.paper-actions {
  display: flex;
  gap: 12px;
}

.action-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-secondary);
  border-bottom: 1px dashed var(--fg-muted);
  cursor: pointer;
  background: none;
  border-left: none;
  border-right: none;
  border-top: none;
  padding: 0;
}

.action-link:hover {
  color: var(--fg);
  border-bottom-style: solid;
}

/* Philosophy & Architecture Section */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.principle-box {
  padding: 28px;
  border: 1px solid var(--border);
  background-color: var(--card-bg);
}

.principle-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-muted);
  margin-bottom: 12px;
}

.principle-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.principle-desc {
  font-size: 0.88rem;
  color: var(--fg-secondary);
  line-height: 1.6;
}

/* Contact / Fellowship Section */
.contact-section-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info-col h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.contact-info-col p {
  color: var(--fg-secondary);
  font-size: 0.95rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

.contact-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-secondary);
}

.contact-features li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.contact-features li::before {
  content: "▪";
  color: var(--fg);
}

.contact-form {
  border: 1px solid var(--border);
  background-color: var(--card-bg);
  padding: 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--fg-muted);
  margin-bottom: 8px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  background-color: var(--bg);
  border: 1px solid var(--border);
  color: var(--fg);
  font-family: inherit;
  font-size: 0.88rem;
  outline: none;
  transition: var(--transition);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--border-strong);
}

.form-textarea {
  min-height: 110px;
  resize: vertical;
}

.form-status-msg {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  display: none;
}

.form-status-msg.success {
  color: #ffffff;
  display: block;
  border-left: 2px solid #ffffff;
  padding-left: 10px;
}

.form-status-msg.error {
  color: #ff5555;
  display: block;
  border-left: 2px solid #ff5555;
  padding-left: 10px;
}

/* Footer */
.footer {
  padding: 60px 0 40px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--fg-muted);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 40px;
}

.footer-col h5 {
  font-size: 0.8rem;
  color: var(--fg);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col a {
  color: var(--fg-muted);
}

.footer-col a:hover {
  color: var(--fg);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
}

/* Modal for BibTeX / Paper Details */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background-color: var(--card-bg);
  border: 1px solid var(--border-strong);
  max-width: 640px;
  width: 100%;
  padding: 32px;
  position: relative;
}

.modal-close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  background: transparent;
  border: none;
  color: var(--fg-muted);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  cursor: pointer;
}

.modal-close-btn:hover {
  color: var(--fg);
}

.modal-bibtex-block {
  background: var(--code-bg);
  padding: 16px;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  white-space: pre-wrap;
  overflow-x: auto;
  margin: 16px 0;
  color: var(--fg);
}

/* Responsive Media Queries */
@media (max-width: 900px) {
  .pillars-grid {
    grid-template-columns: 1fr;
  }
  .telemetry-strip {
    grid-template-columns: repeat(2, 1fr);
  }
  .telemetry-item:nth-child(2) {
    border-right: none;
  }
  .principles-grid {
    grid-template-columns: 1fr;
  }
  .contact-section-inner {
    grid-template-columns: 1fr;
  }
  .footer-top {
    flex-direction: column;
    gap: 32px;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
  .telemetry-strip {
    grid-template-columns: 1fr;
  }
  .telemetry-item {
    border-right: none;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .vis-topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}