:root {
  --header-height: 4rem;
  --padding: 1rem;

  --bg-1: #252423;
  --bg-2: #2a2928;
  --bg-3: #2f2e2d;
  --bg-4: #353433;
  --bg-5: #3a3938;

  --fg-1: #dddcda;
  --fg-2: #c6c3c1;

  --sky-1: #33b3f1;
  --cyan-1: #26f2d5;
}

/* 🌌 Global */
html,
body {
  margin: 0;
  height: 100%;
  font-family: 'IoskeleyMono', ui-monospace, monospace;
  background: radial-gradient(circle at center, #1b2a47 0%, #050b14 100%);
  color: var(--fg-1);
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100lvh;
  overflow-x: hidden;
  overflow-y: auto;
  perspective: 1000px;
}

/* 🎬 Scene */
#scene {
  position: fixed;
  inset: 0;
  transform-style: preserve-3d;

  padding-top: var(--header-height);
  padding-left: var(--padding);
  padding-right: var(--padding);
  padding-bottom: var(--padding);

  box-sizing: border-box;
  overflow: hidden;

  display: flex;
  justify-content: center;
  align-items: center;
}

#scene-content {
  position: relative;
  width: 100%;
  height: 100%;
  pointer-events: none;

  transform-style: preserve-3d;
  overflow: hidden;
}

/* 📊 Responsive Table Layout */
#scene-content[data-layout="table"] {
  display: grid;

  /* ✅ responsive fix */
  grid-template-columns: repeat(auto-fit, minmax(3.5rem, 1fr));

  grid-auto-rows: 4rem;
  gap: 0.25rem;

  justify-content: center;
  align-content: center;
}

/* 🎛 Controls */
.controls {
  position: fixed;
  top: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 10;

  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--padding);
}

.controls button {
  background: var(--bg-4);
  color: var(--fg-1);
  border-radius: 0.25rem;
  padding: 0 0.75rem;
  height: 2rem;
  transition: 0.2s ease;
}

.controls button:hover {
  background: var(--bg-5);
}

.controls button.is-active {
  background: var(--fg-1);
  color: var(--bg-3);
}

/* 🧱 Element */
.element {
  --w: 3.5rem;
  --h: 4rem;

  width: 100%;
  height: 100%;

  display: flex;
  flex-direction: column;
  justify-content: space-between;

  padding: 0.25rem;
  border-radius: 0.25rem;

  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.05);
  color: var(--fg-1);

  cursor: pointer;
  overflow: hidden;

  transform-style: preserve-3d;
  will-change: transform;
  transition: all 0.3s ease;
}

.element:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--fg-1);
}

/* 🔍 Expanded (centered, no overflow) */
.element.is-expanded {
  position: fixed;
  z-index: 50;

  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  width: min(90vw, 20rem);
  height: min(85vh, 20rem);

  padding: 1rem;
  background: rgba(20,20,30,0.95);
  backdrop-filter: blur(10px);
}

/* 🧾 Content */
.element-symbol {
  font-size: 1.5rem;
  font-weight: bold;
}

.element-title {
  font-size: 0.6rem;
  text-align: center;
}

.element-number {
  font-size: 0.6rem;
  align-self: flex-end;
}

/* Expanded typography */
.element.is-expanded .element-symbol {
  font-size: 1.2rem;
}

.element.is-expanded .element-title {
  font-size: 1.5rem;
  text-align: left;
  margin-top: 1rem;
}

.element.is-expanded .element-number {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 1rem;
}

/* Description */
.element-description {
  display: none;
  font-size: 0.75rem;
  margin-top: 1rem;
}

.element.is-expanded .element-description {
  display: block;
}

/* 🌐 3D layouts safe positioning */
#scene-content[data-layout="sphere"] .element,
#scene-content[data-layout="helix"] .element,
#scene-content[data-layout="grid"] .element {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

/* 🧾 Footer */
.credits {
  position: fixed;
  bottom: 0;
  width: 100%;
  height: var(--header-height);
  text-align: center;
  font-size: 0.75rem;
  padding: var(--padding);
}

/* ✨ Glow footer link */
.vishesh-footer a {
  color: var(--sky-1);
  text-decoration: none;
  font-weight: 700;
  transition: 0.3s ease;
}

.vishesh-footer a:hover {
  color: var(--cyan-1);
  text-shadow: 0 0 10px var(--cyan-1);
}