/**
 * SHIYUN LU MINIMALIST EDITORIAL & BOBA PHYSICS STYLES
 * High-contrast typography, full-viewport canvas, and full-screen editorial overlay.
 */

/* =========================================================================
   1. Canvas & Layering
   ========================================================================= */
#canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  z-index: 1;
  overflow: hidden;
  background-color: var(--bg-canvas);
}

#ui-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  z-index: 10;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(18px, 3.5vw, 36px);
  pointer-events: none; /* Passes mouse interactions freely through to canvas */
  box-sizing: border-box;
}

/* =========================================================================
   2. Header & Corner Menu Button
   ========================================================================= */
.top-header {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  width: 100%;
}

.corner-menu-btn {
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-primary);
  padding: 8px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: rgba(244, 241, 234, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--transition-fast);
}

.corner-menu-btn:hover {
  background: #FFFFFF;
  border-color: var(--text-primary);
  transform: translateY(-1px);
}

.corner-menu-btn:active {
  transform: translateY(0);
}

.menu-btn-icon {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 14px;
}

.menu-bar {
  display: block;
  width: 100%;
  height: 1.5px;
  background-color: var(--text-primary);
  border-radius: 1px;
}

/* =========================================================================
   3. Centerpiece Typography (Shiyun Lu Style)
   ========================================================================= */
.hero-centerpiece {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  pointer-events: none;
  margin-top: -3vh; /* Optical vertical centering balance */
}

.display-title-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  pointer-events: none;
}

.display-name {
  font-family: var(--font-sans);
  font-size: clamp(48px, 11.5vw, 144px);
  font-weight: 900;
  line-height: 0.94;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  text-transform: uppercase;
  margin: 0;
  pointer-events: none;
}

.display-sub {
  font-family: var(--font-mono);
  font-size: clamp(13px, 2.2vw, 19px);
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: -0.01em;
  margin: 0;
  pointer-events: none;
}

/* =========================================================================
   4. Minimalist Footer & Subtle Inline Toggles
   ========================================================================= */
.bottom-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
  letter-spacing: 0.03em;
  pointer-events: none;
}

.footer-colophon {
  pointer-events: auto;
  user-select: text;
  -webkit-user-select: text;
}

.footer-debug-toggles {
  display: flex;
  align-items: center;
  gap: 14px;
  pointer-events: auto;
}

.debug-toggle-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  background: none;
  border: none;
  padding: 4px 6px;
  cursor: pointer;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.debug-toggle-btn:hover {
  color: var(--text-primary);
  background: rgba(18, 18, 20, 0.05);
}

.debug-toggle-btn.is-active {
  color: var(--text-primary);
  font-weight: 600;
  background: rgba(18, 18, 20, 0.09);
  border: 1px solid var(--border-subtle);
}

/* =========================================================================
   5. Full-Screen Editorial Overlay (Takes Up Entire Screen When Pressed)
   ========================================================================= */
.menu-fullscreen-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  z-index: 100;
  background-color: var(--bg-canvas);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  transition: opacity 0.32s var(--ease-out), visibility 0.32s var(--ease-out);
}

.menu-fullscreen-overlay.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.menu-fullscreen-container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  padding: clamp(16px, 3.5vw, 36px) clamp(20px, 4.5vw, 56px) 64px;
  box-sizing: border-box;
}

/* Sticky Header inside Fullscreen Overlay */
.menu-fullscreen-header {
  position: sticky;
  top: 0;
  z-index: 25;
  background: rgba(244, 241, 234, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 16px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: clamp(28px, 4vw, 48px);
}

.menu-header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--text-primary);
  display: inline-block;
}

.menu-header-name {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.menu-header-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}

.menu-close-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-primary);
  padding: 8px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  transition: all var(--transition-fast);
}

.menu-close-btn:hover {
  background: #FFFFFF;
  border-color: var(--text-primary);
  transform: translateY(-1px);
}

.menu-close-btn:active {
  transform: translateY(0);
}

.close-key {
  color: var(--text-secondary);
  font-size: 11px;
}

/* Full-Screen Editorial Content */
.menu-fullscreen-content {
  display: flex;
  flex-direction: column;
  gap: clamp(40px, 6vw, 64px);
  flex: 1;
}

.fs-section {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.fs-section-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

/* Intro Profile Section */
.fs-intro-section {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.fs-intro-heading {
  font-family: var(--font-sans);
  font-size: clamp(24px, 3.8vw, 40px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  max-width: 920px;
}

.fs-intro-text {
  font-family: var(--font-sans);
  font-size: clamp(14px, 1.8vw, 16.5px);
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 860px;
}

/* Projects Showcase Grid */
.fs-projects-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.fs-project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: clamp(22px, 3.5vw, 36px);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.fs-project-card:hover {
  background: #FFFFFF;
  border-color: var(--border-strong);
}

.fs-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.fs-card-title {
  font-family: var(--font-sans);
  font-size: clamp(18px, 2.5vw, 24px);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.fs-card-subtitle {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.fs-tag-pill {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-pill);
  border: 1px solid var(--border-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.fs-card-desc {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 960px;
}

/* Verified Telemetry Grid */
.fs-telemetry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-top: 4px;
}

.fs-telemetry-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.fs-tel-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-tertiary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.fs-tel-val {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-primary);
}

/* Tech Badges */
.fs-chips-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.fs-chip {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-secondary);
  background: var(--bg-pill);
  border: 1px solid var(--border-subtle);
  padding: 3px 10px;
  border-radius: var(--radius-xs);
}

/* Connect Grid */
.fs-connect-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.fs-connect-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.fs-connect-card:hover {
  background: #FFFFFF;
  border-color: var(--text-primary);
  transform: translateY(-2px);
  opacity: 1;
}

.fs-connect-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.fs-connect-val {
  font-family: var(--font-mono);
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-primary);
}

/* Full-Screen Editorial Footer */
.fs-footer {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
}

/* =========================================================================
   6. Responsive Adjustments
   ========================================================================= */
@media (max-width: 768px) {
  #ui-layer {
    padding: 18px 16px;
  }

  .display-name {
    font-size: clamp(42px, 13vw, 76px);
  }

  .display-sub {
    font-size: 13px;
  }

  .bottom-footer {
    font-size: 10px;
  }

  .footer-debug-toggles {
    gap: 8px;
  }

  .debug-toggle-btn {
    font-size: 10px;
    padding: 3px 4px;
  }

  .menu-header-meta {
    display: none;
  }

  .fs-telemetry-grid {
    grid-template-columns: 1fr 1fr;
  }
}