@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&family=Roboto+Mono:wght@400;500&family=Roboto+Slab:wght@700&display=swap');

/* ═══════════════════════════════════════
   MATERIAL DESIGN 3 — DARK THEME TOKENS
   ═══════════════════════════════════════ */
:root {
  color-scheme: dark;
  /* MD3 Dark Surface Hierarchy */
  --md-sys-color-background:        #0a0a0d;
  --md-sys-color-surface:           #151419;
  --md-sys-color-surface-variant:   #49454f;
  --md-sys-color-surface-container-lowest:  #0b0b10;
  --md-sys-color-surface-container-low:     #14131a;
  --md-sys-color-surface-container:         #1b1a22;
  --md-sys-color-surface-container-high:    #24232b;
  --md-sys-color-surface-container-highest: #2e2d36;

  /* MD3 Primary — Purple */
  --md-sys-color-primary:           #d0bcff;
  --md-sys-color-on-primary:        #381e72;
  --md-sys-color-primary-container: #4f378b;
  --md-sys-color-on-primary-container: #eaddff;

  /* MD3 Secondary — Teal */
  --md-sys-color-secondary:         #ccc2dc;
  --md-sys-color-tertiary:          #efb8c8;
  --md-sys-color-on-tertiary:       #492532;

  /* MD3 Accent — Teal (for interactive elements) */
  --md-accent:                      #03dac6;
  --md-accent-dim:                  #018786;

  /* MD3 On-Surface */
  --md-sys-color-on-surface:        #e6e1e5;
  --md-sys-color-on-surface-variant:#cac4d0;
  --md-sys-color-outline:           #938f99;
  --md-sys-color-outline-variant:   #49454f;

  /* MD3 Error */
  --md-sys-color-error:             #f2b8b5;
  --md-sys-color-error-container:   #8c1d18;

  /* Elevation overlays (MD3 uses light tint for elevation in dark mode) */
  --md-elevation-1: rgba(208,188,255,0.05);
  --md-elevation-2: rgba(208,188,255,0.08);
  --md-elevation-3: rgba(208,188,255,0.11);
  --md-elevation-4: rgba(208,188,255,0.12);
  --md-elevation-5: rgba(208,188,255,0.14);

  /* Shape */
  --md-shape-extra-small:  4px;
  --md-shape-small:        8px;
  --md-shape-medium:       12px;
  --md-shape-large:        16px;
  --md-shape-extra-large:  28px;
  --md-shape-full:         50px;

  /* Typography */
  --md-font-display:   'Roboto Slab', serif;
  --md-font-body:      'Roboto', sans-serif;
  --md-font-mono:      'Roboto Mono', monospace;

  /* Motion */
  --md-motion-standard:    cubic-bezier(0.2, 0, 0, 1);
  --md-motion-emphasized:  cubic-bezier(0.05, 0.7, 0.1, 1.0);
  --md-motion-decelerate:  cubic-bezier(0, 0, 0, 1);
}

/* ═══════════════════════════════════════
   RESET & BASE
   ═══════════════════════════════════════ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--md-font-body);
  background-color: var(--md-sys-color-background);
  background-image: none;
  color: var(--md-sys-color-on-surface);
  min-height: 100vh;
  padding: 0 0 80px;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--md-sys-color-surface-container-low); }
::-webkit-scrollbar-thumb {
  background: var(--md-sys-color-surface-container-highest);
  border-radius: var(--md-shape-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--md-sys-color-outline); }

/* ═══════════════════════════════════════
   MD3 HEADER / TOP APP BAR
   ═══════════════════════════════════════ */
header {
  background: var(--md-sys-color-surface-container-low);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow:
    0 1px 2px rgba(0,0,0,.3),
    0 2px 6px 2px rgba(0,0,0,.15);
}

.logo {
  font-family: var(--md-font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--md-sys-color-on-surface);
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo span {
  font-size: 26px;
  line-height: 1;
}

header nav {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* MD3 Outlined Button */
.gh-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--md-sys-color-outline);
  color: var(--md-sys-color-primary);
  padding: 0 24px;
  height: 40px;
  border-radius: var(--md-shape-full);
  font-size: 14px;
  font-weight: 500;
  font-family: var(--md-font-body);
  text-decoration: none;
  letter-spacing: 0.1px;
  cursor: pointer;
  transition:
    background var(--md-motion-standard) 150ms,
    border-color var(--md-motion-standard) 150ms,
    box-shadow var(--md-motion-standard) 150ms;
  position: relative;
  overflow: hidden;
}

.gh-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--md-sys-color-primary);
  opacity: 0;
  transition: opacity 150ms var(--md-motion-standard);
}

.gh-btn:hover::before { opacity: 0.08; }
.gh-btn:active::before { opacity: 0.12; }

/* ═══════════════════════════════════════
   HERO SECTION
   ═══════════════════════════════════════ */
.hero {
  text-align: center;
  padding: 72px 20px 48px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: none;
}

.hero h1 {
  font-family: var(--md-font-display);
  font-size: clamp(28px, 4vw, 56px);
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--md-sys-color-primary);
  margin-bottom: 16px;
  position: relative;
}

.hero p {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 16px;
  font-weight: 400;
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.6;
  position: relative;
}

.quickstart {
  background: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-shape-medium);
  padding: 16px 20px;
  font-family: var(--md-font-mono);
  font-size: 13px;
  color: var(--md-accent);
  max-width: 620px;
  margin: 0 auto;
  text-align: left;
  overflow-x: auto;
  white-space: nowrap;
  position: relative;
}

.quickstart .qs-label {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 11px;
  font-family: var(--md-font-body);
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}

/* ═══════════════════════════════════════
   MAIN LAYOUT
   ═══════════════════════════════════════ */
.main {
  max-width: 1120px;
  margin: 32px auto 0;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 16px;
  align-items: start;
}

@media (max-width: 820px) {
  .main { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════
   MD3 CARD — Filled (surface-container)
   ═══════════════════════════════════════ */
.card {
  background: var(--md-sys-color-surface-container);
  border-radius: var(--md-shape-large);
  overflow: hidden;
  box-shadow:
    0 1px 2px rgba(0,0,0,.3),
    0 1px 3px 1px rgba(0,0,0,.15);
  transition: box-shadow 200ms var(--md-motion-standard);
}

.card:hover {
  box-shadow:
    0 1px 2px rgba(0,0,0,.3),
    0 2px 6px 2px rgba(0,0,0,.15);
}

.card-header {
  padding: 16px 20px 12px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  font-size: 11px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface-variant);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--md-sys-color-surface-container-high);
}

.card-body { padding: 20px; }

/* ═══════════════════════════════════════
   FORM CONTROLS — MD3 Filled style
   ═══════════════════════════════════════ */
.field { margin-bottom: 20px; }

label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

/* MD3 Filled Text Field */
input[type="text"],
input[type="number"],
select,
textarea {
  width: 100%;
  background: var(--md-sys-color-surface-container-highest);
  border: none;
  border-bottom: 2px solid var(--md-sys-color-outline);
  border-radius: var(--md-shape-extra-small) var(--md-shape-extra-small) 0 0;
  color: var(--md-sys-color-on-surface);
  padding: 12px 16px;
  font-size: 14px;
  font-family: var(--md-font-body);
  outline: none;
  transition:
    border-color 150ms var(--md-motion-standard),
    background 150ms var(--md-motion-standard);
  appearance: none;
  -webkit-appearance: none;
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='%23cac4d0'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: 36px;
  cursor: pointer;
}

input:focus,
select:focus,
textarea:focus {
  border-bottom-color: var(--md-sys-color-primary);
  background: var(--md-sys-color-surface-container-highest);
}

textarea {
  min-height: 110px;
  resize: vertical;
  font-family: var(--md-font-mono);
  font-size: 13px;
  line-height: 1.7;
  border-radius: var(--md-shape-small) var(--md-shape-small) 0 0;
}

.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.row3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }

/* ═══════════════════════════════════════
   MD3 TOGGLE CHIPS (Filter Chips)
   ═══════════════════════════════════════ */
.toggle-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.toggle-opt {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 16px;
  background: transparent;
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-shape-full);
  font-family: var(--md-font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  transition:
    background 150ms var(--md-motion-standard),
    border-color 150ms var(--md-motion-standard),
    color 150ms var(--md-motion-standard);
  position: relative;
  overflow: hidden;
  user-select: none;
}

.toggle-opt::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--md-sys-color-on-surface);
  opacity: 0;
  transition: opacity 150ms;
}

.toggle-opt:hover::before { opacity: 0.08; }

.toggle-opt.active {
  background: var(--md-sys-color-secondary-container, rgba(208,188,255,0.14));
  border-color: transparent;
  color: var(--md-sys-color-on-secondary-container, var(--md-sys-color-primary));
  background: rgba(208,188,255,0.16);
  border-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-primary);
}

.toggle-opt.active::after {
  content: '';
  display: inline-block;
  width: 16px;
  height: 16px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='%23d0bcff'%3E%3Cpath d='M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-size: contain;
  flex-shrink: 0;
  order: -1;
}

/* ═══════════════════════════════════════
   COLOR SWATCH
   ═══════════════════════════════════════ */
.color-row { display: flex; gap: 10px; align-items: center; }

.color-swatch {
  width: 40px;
  height: 40px;
  border-radius: var(--md-shape-small);
  border: 2px solid var(--md-sys-color-outline-variant);
  cursor: pointer;
  transition:
    transform 150ms var(--md-motion-emphasized),
    border-color 150ms;
  flex-shrink: 0;
}

.color-swatch:hover {
  transform: scale(1.08);
  border-color: var(--md-sys-color-outline);
}

input[type="color"] {
  opacity: 0;
  position: absolute;
  pointer-events: none;
  width: 0;
  height: 0;
}

/* ═══════════════════════════════════════
   ANIMATION PICKER TRIGGER — MD3 Tonal Button
   ═══════════════════════════════════════ */
.anim-trigger {
  width: 100%;
  background: rgba(208,188,255,0.12);
  border: none;
  color: var(--md-sys-color-primary);
  padding: 0 24px;
  height: 48px;
  border-radius: var(--md-shape-full);
  text-align: left;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--md-font-body);
  letter-spacing: 0.1px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: background 150ms var(--md-motion-standard);
  position: relative;
  overflow: hidden;
}

.anim-trigger::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--md-sys-color-primary);
  opacity: 0;
  transition: opacity 150ms;
}

.anim-trigger::after {
  content: '▸';
  margin-left: auto;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 16px;
}

.anim-trigger:hover::before { opacity: 0.08; }
.anim-trigger strong { color: var(--md-sys-color-primary); }

/* ═══════════════════════════════════════
   ANIMATION MODAL — MD3 Dialog
   ═══════════════════════════════════════ */
.anim-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 110;
  padding: 24px;
  backdrop-filter: blur(4px);
}

.anim-modal.open { display: flex; }

.anim-modal-content {
  width: min(1000px, 100%);
  max-height: 85vh;
  overflow: auto;
  background: var(--md-sys-color-surface-container-high);
  border-radius: var(--md-shape-extra-large);
  padding: 24px;
  box-shadow:
    0 8px 10px 1px rgba(0,0,0,.3),
    0 3px 14px 2px rgba(0,0,0,.15),
    0 4px 5px -2px rgba(0,0,0,.2);
}

.anim-modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.anim-modal-head h3 {
  font-family: var(--md-font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  margin-bottom: 4px;
}

.anim-modal-head p {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 14px;
}

/* MD3 Text Button */
.anim-close {
  background: transparent;
  border: none;
  color: var(--md-sys-color-primary);
  font-family: var(--md-font-body);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: var(--md-shape-full);
  cursor: pointer;
  white-space: nowrap;
  transition: background 150ms;
  position: relative;
  overflow: hidden;
}

.anim-close::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--md-sys-color-primary);
  opacity: 0;
  transition: opacity 150ms;
}

.anim-close:hover::before { opacity: 0.08; }

.anim-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

@media (max-width: 940px) {
  .anim-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .anim-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* MD3 Suggestion Chip */
.anim-chip {
  background: var(--md-sys-color-surface-container-lowest);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-shape-small);
  padding: 12px;
  text-align: left;
  cursor: pointer;
  transition:
    background 150ms var(--md-motion-standard),
    border-color 150ms var(--md-motion-standard),
    box-shadow 200ms var(--md-motion-standard);
  position: relative;
  overflow: hidden;
}

.anim-chip::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--md-sys-color-primary);
  opacity: 0;
  transition: opacity 150ms;
}

.anim-chip:hover { border-color: var(--md-sys-color-outline); }
.anim-chip:hover::before { opacity: 0.06; }

.anim-chip.active {
  background: rgba(208,188,255,0.12);
  border-color: var(--md-sys-color-primary);
}

.anim-chip-title {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
  margin-bottom: 4px;
  position: relative;
}

.anim-chip-desc {
  display: block;
  font-size: 11px;
  line-height: 1.4;
  color: var(--md-sys-color-on-surface-variant);
  position: relative;
}

/* ═══════════════════════════════════════
   RIGHT COLUMN
   ═══════════════════════════════════════ */
.right-col { display: flex; flex-direction: column; gap: 16px; }

/* ═══════════════════════════════════════
   PREVIEW
   ═══════════════════════════════════════ */
.preview-wrap {
  background: var(--md-sys-color-surface-container-low);
  border: 2px dashed var(--md-sys-color-outline-variant);
  border-radius: var(--md-shape-medium);
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  transition: border-color 200ms;
}

.preview-wrap:hover { border-color: var(--md-sys-color-outline); }

.preview-wrap img {
  max-width: 100%;
  display: block;
}

.preview-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-shape-medium);
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
}

.preview-loading::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--md-sys-color-surface-container-highest);
  border-top-color: var(--md-sys-color-primary);
  border-radius: 50%;
  animation: md-spin 0.8s linear infinite;
  margin-right: 10px;
}

@keyframes md-spin {
  to { transform: rotate(360deg); }
}

.preview-loading.hidden { display: none; }

/* ═══════════════════════════════════════
   CODE BLOCKS — MD3 Surface
   ═══════════════════════════════════════ */
.code-block { position: relative; }

.code-tabs {
  display: flex;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface-container-high);
}

.code-tab {
  padding: 14px 20px;
  font-family: var(--md-font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition:
    color 150ms var(--md-motion-standard),
    border-color 150ms var(--md-motion-standard);
  position: relative;
}

.code-tab::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--md-sys-color-primary);
  opacity: 0;
  transition: opacity 150ms;
}

.code-tab:hover { color: var(--md-sys-color-on-surface); }
.code-tab:hover::before { opacity: 0.06; }

.code-tab.active {
  color: var(--md-sys-color-primary);
  border-bottom-color: var(--md-sys-color-primary);
}

.code-pane { display: none; position: relative; }
.code-pane.active { display: block; }

pre {
  background: var(--md-sys-color-surface-container-low);
  font-family: var(--md-font-mono);
  font-size: 12px;
  color: var(--md-accent);
  padding: 20px 16px;
  border-radius: 0 0 var(--md-shape-large) var(--md-shape-large);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.7;
}

/* MD3 Icon Button */
.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--md-sys-color-surface-container-high);
  border: none;
  color: var(--md-sys-color-on-surface-variant);
  padding: 6px 14px;
  border-radius: var(--md-shape-full);
  font-size: 12px;
  font-weight: 500;
  font-family: var(--md-font-body);
  letter-spacing: 0.5px;
  cursor: pointer;
  transition:
    background 150ms var(--md-motion-standard),
    color 150ms;
  position: absolute;
  top: 12px;
  right: 12px;
}

.copy-btn:hover { background: var(--md-sys-color-surface-container-highest); }

.copy-btn.copied {
  color: var(--md-accent);
  background: rgba(3,218,198,0.1);
}

/* ═══════════════════════════════════════
   PERMALINK BAR
   ═══════════════════════════════════════ */
.permalink-bar {
  display: flex;
  gap: 12px;
}

.permalink-bar input {
  flex: 1;
  font-family: var(--md-font-mono);
  font-size: 12px;
  color: var(--md-sys-color-on-surface-variant);
  border-bottom-color: var(--md-sys-color-outline-variant);
}

/* MD3 Filled Button */
.perm-btn {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border: none;
  padding: 0 24px;
  height: 48px;
  border-radius: var(--md-shape-full);
  font-family: var(--md-font-body);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.1px;
  cursor: pointer;
  white-space: nowrap;
  transition:
    box-shadow 200ms var(--md-motion-standard),
    background 150ms;
  position: relative;
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(0,0,0,.3);
}

.perm-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: #fff;
  opacity: 0;
  transition: opacity 150ms;
}

.perm-btn:hover {
  box-shadow: 0 1px 3px rgba(0,0,0,.4), 0 4px 8px 3px rgba(0,0,0,.2);
}

.perm-btn:hover::before { opacity: 0.08; }
.perm-btn:active::before { opacity: 0.12; }

/* ═══════════════════════════════════════
   PARAMS TABLE — MD3 Data Table
   ═══════════════════════════════════════ */
.params-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.params-table th {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-on-surface-variant);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: var(--md-sys-color-surface-container-high);
}

.params-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  vertical-align: middle;
  color: var(--md-sys-color-on-surface);
  transition: background 150ms;
}

.params-table tr:last-child td { border-bottom: none; }

.params-table tr:hover td {
  background: var(--md-elevation-1);
}

.params-table code {
  font-family: var(--md-font-mono);
  background: var(--md-sys-color-surface-container-highest);
  padding: 2px 8px;
  border-radius: var(--md-shape-extra-small);
  color: var(--md-sys-color-primary);
  font-size: 12px;
}

/* ═══════════════════════════════════════
   SLIDER — MD3 Continuous Slider
   ═══════════════════════════════════════ */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  display: block;
  width: 100%;
  height: 20px;
  background: transparent;
  border-radius: var(--md-shape-full);
  outline: none;
  padding: 0;
  margin: 0;
  border: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  margin-top: -8px;
  border-radius: 50%;
  background: var(--md-sys-color-primary);
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(0,0,0,.3);
  transition: transform 150ms var(--md-motion-emphasized);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: var(--md-shape-full);
  background: linear-gradient(
    to right,
    var(--md-sys-color-primary) 0%,
    var(--md-sys-color-primary) var(--progress, 50%),
    var(--md-sys-color-surface-container-highest) var(--progress, 50%)
  );
}

input[type="range"]::-moz-range-track {
  height: 4px;
  border: none;
  border-radius: var(--md-shape-full);
  background: var(--md-sys-color-surface-container-highest);
}

input[type="range"]::-moz-range-progress {
  height: 4px;
  border-radius: var(--md-shape-full);
  background: var(--md-sys-color-primary);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border: none;
  border-radius: 50%;
  background: var(--md-sys-color-primary);
  box-shadow: 0 2px 4px rgba(0,0,0,.3);
  transition: transform 150ms var(--md-motion-emphasized);
}

input[type="range"]::-moz-range-thumb:hover {
  transform: scale(1.15);
}

.slider-row { display: flex; gap: 12px; align-items: center; }

.slider-row .val {
  font-family: var(--md-font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--md-sys-color-primary);
  min-width: 56px;
  text-align: right;
}

/* ═══════════════════════════════════════
   BADGE — MD3 Assist Chip
   ═══════════════════════════════════════ */
.badge {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  border-radius: var(--md-shape-full);
  font-size: 11px;
  font-weight: 500;
  background: rgba(208,188,255,0.12);
  color: var(--md-sys-color-primary);
  border: 1px solid var(--md-sys-color-outline-variant);
  margin-left: 8px;
  vertical-align: middle;
}

/* ═══════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════ */
footer {
  text-align: center;
  padding: 48px 20px 0;
  font-size: 13px;
  font-weight: 400;
  color: var(--md-sys-color-on-surface-variant);
}

footer a {
  color: var(--md-sys-color-primary);
  text-decoration: none;
  transition: opacity 150ms;
}

footer a:hover { opacity: 0.8; }

/* ═══════════════════════════════════════
   PARAMS WRAP
   ═══════════════════════════════════════ */
.params-wrap { overflow-x: auto; }
.params-table { min-width: 640px; }

/* ═══════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════ */
@media (max-width: 560px) {
  .row2, .row3 { grid-template-columns: 1fr; }
  .permalink-bar { flex-direction: column; }
  .perm-btn { width: 100%; justify-content: center; }
  header { padding: 0 16px; }
  .main { padding: 0 16px; }
}

/* ═══════════════════════════════════════
   MD3 STATE LAYER — Ripple-like focus ring
   ═══════════════════════════════════════ */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

/* ═══════════════════════════════════════
   CARD MARGIN HELPERS
   ═══════════════════════════════════════ */
.card + .card { margin-top: 0; }
.card-body > .field:last-child { margin-bottom: 0; }