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

:root {
  /* Base Grid Sizes */
  --grid-w: 68px;
  --grid-h: 88px;
  
  /* Light Mode Palette (Default) */
  --paper: #FDFBF7;
  --ui-bg: #FFFFFF;
  --ink-dark: #1A1A19;
  --ink-med: #5E5C58;
  --ink-light: #9B9992;
  --line-color: #E8E6DF;
  --line-strong: #D1CFC7;
  --glass-bg: rgba(253, 251, 247, 0.75);
  --glass-border: rgba(209, 207, 199, 0.4);
  --ui-shadow: rgba(0,0,0,0.04);
  --ui-shadow-hover: rgba(0,0,0,0.12);

  /* Card Text */
  --card-ink-main: #1A1A19;
  --card-ink-sub: #5E5C58;
  --card-line: rgba(0,0,0,0.15);

  /* Vibrant Pastel Colors */
  --cat-0: #ffcdd2; 
  --cat-1: #ffe0b2; 
  --cat-2: #fff9c4; 
  --cat-3: #dcedc8; 
  --cat-4: #c8e6c9; 
  --cat-5: #b2dfdb; 
  --cat-6: #bbdefb; 
  --cat-7: #d1c4e9; 
  --cat-8: #e1bee7; 
  --cat-9: #f8bbd0; 
}

/* Dark Mode Palette */
:root.dark {
  --paper: #0f1115;
  --ui-bg: #1a1d24;
  --ink-dark: #f8f9fa;
  --ink-med: #a1a5b0;
  --ink-light: #6c7280;
  --line-color: #2e3340;
  --line-strong: #3f4554;
  --glass-bg: rgba(26, 29, 36, 0.75);
  --glass-border: rgba(63, 69, 84, 0.4);
  --ui-shadow: rgba(0,0,0,0.4);
  --ui-shadow-hover: rgba(0,0,0,0.6);

  --card-ink-main: #1A1A19;
  --card-ink-sub: #4a4844;
  --card-line: rgba(0,0,0,0.2);
}

body {
  background-color: var(--paper);
  background-image: radial-gradient(var(--line-strong) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--ink-dark);
  font-family: 'Lora', serif;
  overflow: hidden;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  perspective: 1200px;
  transition: background-color 0.4s ease, color 0.4s ease;
  touch-action: none; /* Prevents native scroll interference for 3D parallax */
}

/* Dragging Cursor */
body.is-dragging, body.is-dragging * {
  cursor: grabbing !important;
}

/* ════════════════════════════════
   SPLIT HEADER UI
════════════════════════════════ */
.ui-layer {
  position: absolute;
  top: 0; left: 0; right: 0; 
  pointer-events: none;
  z-index: 150;
  padding: 1.5rem;
}

.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  width: 100%;
}

/* Shared Glass Pill Styles */
.glass-pill {
  pointer-events: auto;
  background: var(--glass-bg);
  border-radius: 50px;
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 4px 24px var(--ui-shadow);
  display: flex;
  align-items: center;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-pill:hover {
  box-shadow: 0 8px 32px var(--ui-shadow-hover);
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

/* Left Pill (Branding & Socials) */
.left-pill {
  padding: 0.4rem 0.5rem 0.4rem 1.2rem;
  gap: 0.8rem;
}

.title-group h1 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.header-divider {
  width: 1px;
  height: 18px;
  background-color: var(--line-strong);
  opacity: 0.6;
}

.social-links { display: flex; gap: 0.3rem; }
.social-links a {
  display: flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--ui-bg); border: 1px solid var(--line-strong);
  color: var(--ink-med); text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.social-links a i, .social-links a svg { width: 13px; height: 13px; transition: transform 0.3s ease; }
.social-links a:hover {
  background: var(--ink-dark); color: var(--paper); border-color: var(--ink-dark);
  transform: translateY(-2px); box-shadow: 0 4px 12px var(--ui-shadow-hover);
}
.social-links a:hover i, .social-links a:hover svg { transform: scale(1.15); }

/* Right Pill (Controls & Layout) */
.right-pill {
  padding: 0.4rem;
  gap: 0.5rem;
}

.search-box { position: relative; display: flex; align-items: center; }
.search-icon-wrapper { 
  position: absolute; left: 1rem; display: flex; align-items: center; justify-content: center;
  color: var(--ink-light); pointer-events: none; z-index: 2;
}
.search-icon-wrapper svg { width: 14px; height: 14px; }

#search {
  background: transparent; border: none;
  padding: 0.5rem 1rem 0.5rem 2.4rem;
  font-family: 'IBM Plex Mono', monospace; font-size: 0.75rem;
  color: var(--ink-dark); width: 150px; 
  transition: all 0.3s ease; outline: none;
}
#search:focus { width: 190px; }
#search::placeholder { color: var(--ink-light); }

.layout-group {
  display: flex; border: 1px solid var(--line-strong); 
  border-radius: 50px; overflow: hidden; background: var(--ui-bg);
}

.layout-btn {
  background: transparent; border: none; border-right: 1px solid var(--line-strong);
  padding: 0.45rem 0.9rem; font-family: 'IBM Plex Mono', monospace; font-size: 0.7rem;
  color: var(--ink-med); cursor: pointer; transition: all 0.2s ease;
}
.layout-btn:last-child { border-right: none; }
.layout-btn:hover { color: var(--ink-dark); background: var(--line-color); }
.layout-btn.is-active { background: var(--ink-dark); color: var(--paper); font-weight: 500; }

.icon-btn {
  background: var(--ui-bg); border: 1px solid var(--line-strong);
  color: var(--ink-dark); width: 34px; height: 34px; border-radius: 50px; 
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all 0.2s ease;
}
.icon-btn:hover { background: var(--line-color); }
.icon-btn i, .icon-btn svg { width: 14px; height: 14px; }

/* ════════════════════════════════
   BOTTOM FOOTER (Fixed for reliability)
════════════════════════════════ */
.bottom-bar {
  position: fixed;
  bottom: 1.5rem;
  left: 0; right: 0;
  display: flex;
  justify-content: center;
  pointer-events: none;
  z-index: 160;
}

.bottom-credit {
  pointer-events: auto;
  background: var(--glass-bg);
  padding: 0.5rem 1.2rem;
  border-radius: 50px;
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 16px var(--ui-shadow);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  color: var(--ink-med);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.3s ease;
}

.bottom-credit:hover {
  border-color: var(--line-strong); color: var(--ink-dark); transform: translateY(-2px);
}
.bottom-credit span.heart { color: #ef4444; animation: pulse 2s infinite cubic-bezier(0.4, 0, 0.6, 1); display: inline-block; }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(0.85); opacity: 0.8; } }

/* ════════════════════════════════
   3D SCENE & SCALER
════════════════════════════════ */
#scene-scaler {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex; align-items: center; justify-content: center;
  z-index: 10; pointer-events: none;
  transform-origin: center center;
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1); /* Smooth layout rescale transition */
}

#scene {
  position: relative;
  width: 100%; height: 100%;
  transform-style: preserve-3d;
  pointer-events: auto;
  will-change: transform;
}

#scene.is-draggable {
  cursor: grab;
}

#scene-content {
  pointer-events: none;
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  transform-style: preserve-3d;
  backface-visibility: hidden;
}

#scene-content[data-layout="table"] {
  display: grid;
  grid-template-columns: repeat(18, var(--grid-w));
  grid-auto-rows: var(--grid-h);
  gap: 0.35rem;
  place-content: center;
}

#scene-content[data-layout="sphere"] .element-card,
#scene-content[data-layout="helix"] .element-card,
#scene-content[data-layout="grid"] .element-card {
  position: absolute;
  left: 50%; top: 50%;
  margin-left: calc(var(--grid-w) * -0.5);
  margin-top: calc(var(--grid-h) * -0.5);
}

/* ════════════════════════════════
   ELEMENT CARDS
════════════════════════════════ */
.element-card {
  --w: var(--grid-w);
  --h: var(--grid-h);
  overflow: hidden; pointer-events: auto; position: relative;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  width: var(--w); height: var(--h);
  border: 1px solid var(--line-strong); box-shadow: 0 4px 12px var(--ui-shadow); border-radius: 8px;
  transform-style: preserve-3d; cursor: pointer;
  will-change: transform, opacity, width, height;
  transition: opacity 0.3s ease, filter 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  z-index: 8;
}

.element-card[data-color="0"] { background-color: var(--cat-0); }
.element-card[data-color="1"] { background-color: var(--cat-1); }
.element-card[data-color="2"] { background-color: var(--cat-2); }
.element-card[data-color="3"] { background-color: var(--cat-3); }
.element-card[data-color="4"] { background-color: var(--cat-4); }
.element-card[data-color="5"] { background-color: var(--cat-5); }
.element-card[data-color="6"] { background-color: var(--cat-6); }
.element-card[data-color="7"] { background-color: var(--cat-7); }
.element-card[data-color="8"] { background-color: var(--cat-8); }
.element-card[data-color="9"] { background-color: var(--cat-9); }

.element-card:hover {
  border-color: var(--card-ink-main); box-shadow: 0 12px 32px var(--ui-shadow-hover); z-index: 50 !important;
}
.element-card.is-faded { opacity: 0.1; filter: grayscale(1); pointer-events: none; }

/* Added dynamically for smooth expand/collapse without AnimeJS layout flashes */
.element-card.transition-active {
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
              height 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
              margin 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.3s ease, filter 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease !important;
}

/* Expanded State (Bigger and Clearer Pop-up) */
.element-card.is-expanded {
  --w: 300px;
  --h: 400px;
  z-index: 100 !important; 
  border-color: var(--card-ink-main);
  border-width: 3px;
  box-shadow: 0 24px 60px var(--ui-shadow-hover);
  align-items: flex-start; justify-content: flex-start; 
  padding: 2rem; cursor: default; 
}
#scene-content[data-layout="table"] .element-card.is-expanded {
  margin-left: calc((var(--grid-w) - 300px) / 2);
  margin-top: calc((var(--grid-h) - 400px) / 2);
}

.el-num { position: absolute; top: 6px; right: 8px; font-size: 0.65rem; font-family: 'IBM Plex Mono', monospace; color: var(--card-ink-sub); font-weight: 600; }
.el-sym { font-size: 1.8rem; font-weight: 700; line-height: 1; color: var(--card-ink-main); margin-bottom: 4px; }
.el-name { font-size: 0.55rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--card-ink-sub); font-weight: 600; text-align: center; width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.el-details { display: none; flex-direction: column; width: 100%; height: 100%; font-family: 'IBM Plex Mono', monospace; opacity: 0; }
.element-card.is-expanded .el-details { display: flex; animation: fadeInDetails 0.3s cubic-bezier(0.4, 0, 0.2, 1) 0.15s forwards; }
.element-card.is-expanded > .el-num, .element-card.is-expanded > .el-sym, .element-card.is-expanded > .el-name { display: none; }

.det-header { border-bottom: 1px solid var(--card-line); padding-bottom: 1.2rem; margin-bottom: 1.5rem; position: relative; width: 100%; }
.det-sym { font-family: 'Lora', serif; font-size: 5rem; font-weight: 600; color: var(--card-ink-main); line-height: 1; }
.det-name { font-size: 1.4rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--card-ink-sub); font-weight: 600; margin-top: 0.6rem; }
.det-num { position: absolute; top: 0; right: 0; font-size: 1.8rem; color: var(--card-ink-sub); font-weight: 600; }

.det-content { width: 100%; display: flex; flex-direction: column; gap: 0.8rem; }
.det-row { display: flex; justify-content: space-between; border-bottom: 1px dotted var(--card-line); padding-bottom: 0.4rem; font-size: 0.95rem; margin-bottom: 0.2rem; }
.det-row:last-child { border-bottom: none; }
.det-label { color: var(--card-ink-sub); font-weight: 500; }
.det-val { color: var(--card-ink-main); font-weight: 700; text-align: right;}

@keyframes fadeInDetails { 0% { opacity: 0; transform: translateY(10px); } 100% { opacity: 1; transform: translateY(0); } }

/* ════════════════════════════════
   ULTRA-SMOOTH MOBILE RESPONSIVENESS
════════════════════════════════ */
@media (max-width: 1050px) {
  .top-bar {
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
  }
  .left-pill, .right-pill {
    width: max-content;
    max-width: 100%;
    justify-content: center;
  }
  .right-pill { padding: 0.35rem 0.4rem; gap: 0.4rem; }
}

@media (max-width: 768px) {
  .ui-layer { padding: 0.8rem; }
  .top-bar { gap: 0.5rem; }
  
  .right-pill { padding: 0.25rem 0.3rem; gap: 0.3rem; }
  .left-pill { padding: 0.25rem 0.5rem 0.25rem 1rem; gap: 0.6rem; }
  
  #search { width: 75px; padding: 0.4rem 0.4rem 0.4rem 1.6rem; font-size: 0.65rem; }
  #search:focus { width: 110px; }
  .search-icon-wrapper { left: 0.5rem; }
  .search-icon-wrapper svg { width: 12px; height: 12px; }
  
  .layout-btn { padding: 0.35rem 0.5rem; font-size: 0.6rem; }
  .icon-btn { width: 28px; height: 28px; }
  .icon-btn svg, .icon-btn i { width: 12px; height: 12px; }
  
  .title-group h1 { font-size: 0.95rem; }
  .social-links a { width: 26px; height: 26px; }
  .bottom-credit { font-size: 0.6rem; padding: 0.4rem 1rem; }
}