styles.css

/* DBLingo — dark MongoDB-evergreen theme.
   Pulls colors from LeafyGreen tokens (--lg-*) defined alongside this file. */

@font-face {
  font-family: 'Lexend Deca';
  src: url('assets/fonts/LexendDeca-VariableFont_wght.ttf') format('truetype');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Source Serif 4';
  src: url('assets/fonts/SourceSerif4-VariableFont_opsz,wght.ttf') format('truetype');
  font-weight: 200 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Source Serif 4';
  src: url('assets/fonts/SourceSerif4-Italic-VariableFont_opsz,wght.ttf') format('truetype');
  font-weight: 200 900;
  font-style: italic;
  font-display: swap;
}

:root {
  /* Re-declare the LeafyGreen tokens we use, so we don't depend on the
     full design-system stylesheet. Same values, slimmed list. */
  --lg-black:        #001E2B;
  --lg-green-base:   #00684A;
  --lg-green-dark1:  #00513A;
  --lg-green-dark2:  #023430;
  --lg-green-dark3:  #023430;
  --lg-green-light1: #00A35C;
  --lg-green-light2: #71F6BA;
  --lg-green-light3: #C0FAE6;
  --lg-spring:       #00ED64;
  --lg-blue-base:    #016BF8;
  --lg-blue-light1:  #0498EC;
  --lg-blue-light2:  #C3E7FE;
  --lg-purple-base:  #5E0C9E;
  --lg-purple-light2:#D5BCE3;
  --lg-purple-light3:#F1E2F8;
  --lg-yellow-base:  #FFC010;
  --lg-yellow-light2:#FFEC9E;
  --lg-red-base:     #DB3030;
  --lg-red-light2:   #FFCDC7;
  --lg-gray-light1:  #C1C7C6;
  --lg-gray-light2:  #E8EDEB;
  --lg-gray-light3:  #F9FBFA;
  --lg-gray-base:    #889397;

  /* App-specific surfaces (atop --lg-black). */
  --ml-bg:           #001E2B;
  --ml-bg-2:         #052F3F;  /* raised surface */
  --ml-bg-3:         #083548;  /* card surface */
  --ml-bg-elev:      #0B3D52;
  --ml-border:       rgba(193, 199, 198, 0.14);
  --ml-border-soft:  rgba(193, 199, 198, 0.08);
  --ml-border-green: rgba(0, 237, 100, 0.32);
  --ml-text:         #E1E7E5;
  --ml-text-dim:     #889397;
  --ml-text-faint:   #5E6D74;

  --ml-radius-sm: 6px;
  --ml-radius:    8px;
  --ml-radius-lg: 12px;
  --ml-radius-xl: 16px;

  --ml-shadow-1: 0 2px 6px 0 rgba(0,0,0,0.32);
  --ml-shadow-2: 0 12px 32px -8px rgba(0,0,0,0.55);

  --ml-dur: 160ms;
  --ml-ease: cubic-bezier(0.2, 0.6, 0.2, 1);

  --ml-font-sans: 'Lexend Deca', system-ui, -apple-system, sans-serif;
  --ml-font-mono: 'Source Code Pro', ui-monospace, SFMono-Regular, Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--ml-font-sans);
  background: var(--ml-bg);
  color: var(--ml-text);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

/* Subtle ambient radial spotlight matching the brand inverse-surface vibe. */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 800px 480px at 20% -10%, rgba(0,237,100,0.10), transparent 60%),
    radial-gradient(ellipse 1200px 600px at 110% 110%, rgba(0,104,74,0.18), transparent 60%);
}

#root { position: relative; z-index: 1; }

button { font-family: inherit; cursor: pointer; }
code, pre, .mono { font-family: var(--ml-font-mono); }

/* ---------- App shell ---------- */
.ml-app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.ml-topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 24px;
  background: rgba(0,30,43,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--ml-border-soft);
  position: sticky;
  top: 0;
  z-index: 10;
}
.ml-topbar__brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 17px;
}
.ml-topbar__brand img { height: 22px; width: auto; }
.ml-topbar__brand .tag {
  margin-left: 6px;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lg-spring);
  background: rgba(0,237,100,0.08);
  border: 1px solid var(--ml-border-green);
  padding: 2px 7px;
  border-radius: var(--ml-radius-sm);
}
.ml-topbar__nav {
  display: flex; gap: 4px; margin-left: 12px;
}
.ml-topbar__nav button {
  background: transparent;
  border: 0;
  color: var(--ml-text-dim);
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--ml-radius-sm);
  transition: color var(--ml-dur), background var(--ml-dur);
}
.ml-topbar__nav button:hover { color: var(--ml-text); background: rgba(255,255,255,0.04); }
.ml-topbar__nav button[aria-current="page"] {
  color: var(--lg-spring);
  background: rgba(0,237,100,0.08);
}
.ml-topbar__profile {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  max-width: 260px;
  color: var(--ml-text-dim);
  font-size: 12px;
  padding: 6px 10px;
  border: 1px solid var(--ml-border-soft);
  border-radius: var(--ml-radius-sm);
  background: rgba(255,255,255,0.03);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.ml-topbar__profile .dot { color: var(--ml-text-faint); }
.ml-topbar__hud {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 14px;
}
.ml-topbar__profile + .ml-topbar__hud { margin-left: 0; }

/* ---------- HUD stats ---------- */
.ml-stat {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: var(--ml-radius-sm);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--ml-border-soft);
  font-size: 13px;
  font-weight: 600;
  color: var(--ml-text);
}
.ml-stat .num { font-variant-numeric: tabular-nums; }
.ml-stat--xp { color: var(--lg-spring); border-color: var(--ml-border-green); background: rgba(0,237,100,0.06); }
.ml-stat--streak { color: var(--lg-yellow-base); }
.ml-stat--leaf { color: var(--lg-spring); }
.ml-stat svg, .ml-stat img { width: 14px; height: 14px; }

.ml-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--lg-spring), var(--lg-green-base));
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--lg-black);
  font-weight: 700;
  font-size: 13px;
}

/* ---------- Main container ---------- */
.ml-main {
  flex: 1;
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}
@media (max-width: 720px) {
  .ml-topbar { padding: 12px 14px; gap: 12px; }
  .ml-topbar__nav { display: none; }
  .ml-main { padding: 18px 14px 80px; }
}

/* ---------- Buttons ---------- */
.ml-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--ml-radius-sm);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: background var(--ml-dur), box-shadow var(--ml-dur), transform 90ms;
  background: var(--ml-bg-2);
  color: var(--ml-text);
  border-color: var(--ml-border);
  white-space: nowrap;
}
.ml-btn:hover { box-shadow: 0 0 0 3px rgba(193,199,198,0.08); }
.ml-btn:active { transform: translateY(1px); }
.ml-btn:disabled { opacity: 0.45; cursor: not-allowed; box-shadow: none; }
.ml-btn--primary {
  background: var(--lg-spring);
  color: var(--lg-black);
  border-color: var(--lg-spring);
}
.ml-btn--primary:hover { background: #1AF076; box-shadow: 0 0 0 3px rgba(0,237,100,0.25); }
.ml-btn--ghost {
  background: transparent;
  border-color: var(--ml-border);
  color: var(--ml-text-dim);
}
.ml-btn--ghost:hover { color: var(--ml-text); }
.ml-btn--lg { padding: 13px 22px; font-size: 15px; }
.ml-btn--sm { padding: 6px 12px; font-size: 12px; }

/* ---------- Cards ---------- */
.ml-card {
  background: var(--ml-bg-3);
  border: 1px solid var(--ml-border);
  border-radius: var(--ml-radius-lg);
  box-shadow: var(--ml-shadow-1);
}

/* ---------- Landing / assignment setup ---------- */
.ml-landing {
  display: grid;
  gap: 28px;
  max-width: 1120px;
  margin: 0 auto;
}
.ml-landing__hero {
  text-align: center;
  padding: 34px 16px 10px;
}
.ml-landing__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--lg-spring);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 11px;
  font-weight: 700;
}
.ml-landing__hero h1 {
  max-width: 780px;
  margin: 0 auto 14px;
  font-size: clamp(34px, 6vw, 62px);
  line-height: 1.02;
  letter-spacing: -0.045em;
}
.ml-landing__hero p {
  max-width: 680px;
  margin: 0 auto;
  color: var(--ml-text-dim);
  font-size: 16px;
}
.ml-landing__panel {
  background: linear-gradient(180deg, rgba(8,53,72,0.98), rgba(5,47,63,0.96));
  border: 1px solid var(--ml-border);
  border-radius: var(--ml-radius-xl);
  box-shadow: var(--ml-shadow-2);
  padding: 24px;
}
.ml-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}
.ml-field {
  display: grid;
  gap: 8px;
}
.ml-field span {
  color: var(--ml-text-dim);
  font-size: 12px;
  font-weight: 600;
}
.ml-field input,
.ml-path-card select {
  width: 100%;
  min-height: 42px;
  border-radius: var(--ml-radius-sm);
  border: 1px solid var(--ml-border);
  background: rgba(0,30,43,0.72);
  color: var(--ml-text);
  padding: 10px 12px;
  font: inherit;
  outline: none;
}
.ml-field input:focus,
.ml-path-card select:focus {
  border-color: var(--ml-border-green);
  box-shadow: 0 0 0 3px rgba(0,237,100,0.13);
}
.ml-path-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.ml-path-card {
  position: relative;
  min-height: 210px;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px;
  border-radius: var(--ml-radius-lg);
  border: 1px solid var(--ml-border);
  background: rgba(0,30,43,0.42);
  color: var(--ml-text);
  cursor: pointer;
  transition: border-color var(--ml-dur), background var(--ml-dur), transform var(--ml-dur), box-shadow var(--ml-dur);
}
.ml-path-card:focus-visible {
  outline: 2px solid var(--lg-spring);
  outline-offset: 3px;
}
.ml-path-card:hover {
  transform: translateY(-1px);
  border-color: rgba(0,237,100,0.28);
  box-shadow: 0 14px 30px -24px rgba(0,237,100,0.45);
}
.ml-path-card[data-selected="true"] {
  border-color: rgba(0,237,100,0.62);
  background: rgba(0,237,100,0.075);
}
.ml-path-card__check {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--lg-spring);
  color: var(--lg-black);
  font-weight: 800;
  opacity: 0;
}
.ml-path-card[data-selected="true"] .ml-path-card__check { opacity: 1; }
.ml-path-card__badge {
  align-self: flex-start;
  color: var(--lg-spring);
  background: rgba(0,237,100,0.08);
  border: 1px solid var(--ml-border-green);
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.ml-path-card strong {
  font-size: 20px;
  letter-spacing: -0.025em;
}
.ml-path-card > span:not(.ml-path-card__badge):not(.ml-path-card__check) {
  color: var(--ml-text-dim);
  font-size: 13px;
}
.ml-path-card__control {
  margin-top: auto;
}
.ml-assignment-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 20px;
  padding: 16px;
  border: 1px solid var(--ml-border-soft);
  border-radius: var(--ml-radius-lg);
  background: rgba(255,255,255,0.035);
}
.ml-assignment-summary strong {
  display: block;
  font-size: 18px;
  margin-bottom: 4px;
}
.ml-assignment-summary p {
  margin: 0;
  color: var(--ml-text-dim);
  max-width: 680px;
}
.ml-assignment-chip {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  margin-top: 10px;
  padding: 12px 14px;
  border-radius: var(--ml-radius-lg);
  border: 1px solid var(--ml-border-green);
  background: rgba(0,237,100,0.07);
}
.ml-assignment-chip div {
  display: grid;
  gap: 1px;
  text-align: left;
}
.ml-assignment-chip span,
.ml-assignment-chip small {
  color: var(--ml-text-dim);
  font-size: 11px;
}
.ml-assignment-chip strong {
  color: var(--ml-text);
}

@media (max-width: 900px) {
  .ml-path-grid { grid-template-columns: 1fr; }
  .ml-form-grid { grid-template-columns: 1fr; }
  .ml-assignment-summary { align-items: stretch; flex-direction: column; }
}

/* ---------- World map · snaking trail (home) ---------- */
.ml-trail {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
  padding: 8px 0 60px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
}
.ml-trail-back {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* World banner sits inline in the trail */
.ml-trail-banner {
  position: relative;
  z-index: 1;
  margin: 32px auto 16px;
  width: min(100%, 560px);
  padding: 22px 24px;
  border-radius: var(--ml-radius-xl);
  background: linear-gradient(180deg, var(--ml-bg-3), var(--ml-bg-2));
  border: 1px solid var(--ml-border);
  overflow: hidden;
  text-align: center;
}
.ml-trail-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 320px 220px at 50% 0%, var(--world-tint, rgba(0,237,100,0.14)), transparent 70%);
  pointer-events: none;
}
.ml-trail-banner > * { position: relative; z-index: 1; }
.ml-trail-banner[data-locked="true"] { opacity: 0.55; }
.ml-trail-banner__badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--world-tint-solid, var(--lg-spring));
  font-weight: 600;
  margin-bottom: 8px;
}
.ml-trail-banner__title {
  font-family: 'Source Serif 4', Georgia, serif;
  font-weight: 500;
  font-size: 28px; line-height: 1.05; letter-spacing: -0.015em;
  margin: 0 0 6px;
  color: #fff;
}
.ml-trail-banner__desc { color: var(--ml-text-dim); font-size: 13px; margin: 0 auto 12px; max-width: 44ch; }
.ml-trail-banner__progress {
  display: flex; align-items: center; gap: 10px;
  justify-content: center;
  font-size: 11px; color: var(--ml-text-dim); font-variant-numeric: tabular-nums;
}
.ml-trail-banner__bar {
  width: 160px; height: 6px;
  background: rgba(255,255,255,0.06);
  border-radius: 4px;
  overflow: hidden;
}
.ml-trail-banner__bar > div {
  height: 100%;
  background: var(--world-tint-solid, var(--lg-spring));
  border-radius: 4px;
  transition: width 600ms var(--ml-ease);
}

/* Each trail row holds a node + its label, offset side-to-side. */
.ml-trail-row {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 6px 0;
}
.ml-trail-row--center      { justify-content: center; padding-left: 0; }
.ml-trail-row--right       { justify-content: center; padding-left: 96px;  }
.ml-trail-row--far-right   { justify-content: center; padding-left: 176px; }
.ml-trail-row--left        { justify-content: center; padding-right: 96px;  }
.ml-trail-row--far-left    { justify-content: center; padding-right: 176px; }

/* The node itself: a Duolingo-y 3D button */
.ml-trail-node {
  position: relative;
  width: 76px; height: 76px;
  border-radius: 50%;
  border: 3px solid var(--ml-border);
  background: var(--ml-bg-elev);
  color: var(--ml-text-faint);
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 120ms var(--ml-ease), box-shadow 120ms var(--ml-ease), background 120ms;
  box-shadow: 0 4px 0 0 rgba(0,0,0,0.35);
}
.ml-trail-node:disabled { cursor: not-allowed; }
.ml-trail-node[data-status="done"] {
  background: var(--lg-spring);
  color: var(--lg-black);
  border-color: #1AF076;
  box-shadow: 0 4px 0 0 var(--lg-green-base), 0 0 0 2px rgba(0,237,100,0.18);
}
.ml-trail-node[data-status="done"][data-perfect="true"] {
  background: linear-gradient(135deg, var(--lg-yellow-light2), var(--lg-yellow-base));
  border-color: var(--lg-yellow-base);
  box-shadow: 0 4px 0 0 #B7860C, 0 0 0 3px rgba(255,192,16,0.22);
}
.ml-trail-node[data-status="current"] {
  background: #fff;
  color: var(--lg-black);
  border-color: var(--lg-spring);
  box-shadow: 0 5px 0 0 var(--lg-spring), 0 0 0 6px rgba(0,237,100,0.18);
}
.ml-trail-node[data-status="current"]:hover {
  transform: translateY(1px);
  box-shadow: 0 4px 0 0 var(--lg-spring), 0 0 0 8px rgba(0,237,100,0.22);
}
.ml-trail-node[data-status="locked"] {
  background: var(--ml-bg-2);
  color: var(--ml-text-faint);
  border-color: var(--ml-border-soft);
  box-shadow: 0 4px 0 0 rgba(0,0,0,0.32);
}
.ml-trail-node.is-special {
  border-radius: 14px;
  width: 84px; height: 84px;
  transform: rotate(45deg);
}
.ml-trail-node.is-special > * { transform: rotate(-45deg); }
.ml-trail-node.is-special[data-status="current"] {
  background: linear-gradient(135deg, var(--lg-yellow-light2), var(--lg-yellow-base));
  border-color: var(--lg-yellow-base);
  box-shadow: 0 5px 0 0 #B7860C, 0 0 0 6px rgba(255,192,16,0.22);
}
.ml-trail-node.is-special[data-status="locked"] {
  background: rgba(94,12,158,0.18);
}
.ml-trail-node__play {
  font-size: 22px; line-height: 1; margin-left: 4px; color: var(--lg-black);
}
.ml-trail-node__leaf-badge {
  position: absolute;
  right: 8px;
  bottom: 8px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.48);
  border: 1px solid rgba(0,30,43,0.18);
  box-shadow: 0 2px 4px rgba(0,0,0,0.18);
}
.ml-trail-node__pulse {
  position: absolute; inset: -10px;
  border-radius: inherit;
  border: 2px solid var(--lg-spring);
  opacity: 0;
  animation: ml-trail-pulse 1.8s infinite;
  pointer-events: none;
}
.ml-trail-node.is-special .ml-trail-node__pulse { border-color: var(--lg-yellow-base); }
@keyframes ml-trail-pulse {
  0%   { opacity: 0.6; transform: scale(0.85); }
  100% { opacity: 0;   transform: scale(1.35); }
}

.ml-trail-label {
  min-width: 0;
  max-width: 200px;
}
.ml-trail-label__sub {
  font-family: var(--ml-font-mono);
  font-size: 10px;
  color: var(--ml-text-faint);
  letter-spacing: 0.08em;
}
.ml-trail-label__title {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ml-text);
  line-height: 1.25;
}
.ml-trail-row .ml-trail-node[data-status="locked"] ~ .ml-trail-label .ml-trail-label__title {
  color: var(--ml-text-faint);
}
.ml-trail-label__meta {
  font-size: 11px;
  color: var(--ml-text-dim);
  margin-top: 2px;
}

.ml-trail-end {
  position: relative; z-index: 1;
  margin: 28px auto 0;
  display: flex; align-items: center; gap: 10px;
  padding: 14px 20px;
  border-radius: var(--ml-radius);
  background: rgba(0,237,100,0.04);
  border: 1px dashed var(--ml-border-green);
  color: var(--ml-text-dim);
  font-size: 13px;
  max-width: 360px;
  text-align: center;
}

@media (max-width: 540px) {
  .ml-trail-row--right     { padding-left: 60px; }
  .ml-trail-row--far-right { padding-left: 110px; }
  .ml-trail-row--left      { padding-right: 60px; }
  .ml-trail-row--far-left  { padding-right: 110px; }
  .ml-trail-label { display: none; }
  .ml-trail-back { display: none; }
}
.ml-hero {
  padding: 8px 0 28px;
}
.ml-hero h1 {
  font-family: var(--ml-font-sans);
  font-weight: 500;
  font-size: 36px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  text-wrap: balance;
}
.ml-hero h1 .accent { color: var(--lg-spring); }
.ml-hero p { color: var(--ml-text-dim); margin: 0; max-width: 62ch; font-size: 15px; }

.ml-path {
  display: grid;
  gap: 24px;
  margin-top: 12px;
}
.ml-world {
  position: relative;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  padding: 24px;
  border-radius: var(--ml-radius-xl);
  background: linear-gradient(180deg, var(--ml-bg-3), var(--ml-bg-2));
  border: 1px solid var(--ml-border);
  overflow: hidden;
}
.ml-world::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 320px 220px at 8% 0%, var(--world-tint, rgba(0,237,100,0.14)), transparent 70%);
  pointer-events: none;
}
.ml-world[data-locked="true"] { opacity: 0.55; }
.ml-world[data-locked="true"] .ml-world__title { color: var(--ml-text-dim); }
.ml-world__meta {
  position: relative; z-index: 1;
  display: flex; flex-direction: column;
  gap: 14px;
}
.ml-world__badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--world-tint-solid, var(--lg-spring));
  font-weight: 600;
}
.ml-world__badge::before {
  content: '';
  width: 22px; height: 1px;
  background: var(--world-tint-solid, var(--lg-spring));
  opacity: 0.5;
}
.ml-world__title {
  font-family: 'Source Serif 4', 'Source Serif Pro', Georgia, serif;
  font-weight: 500;
  font-size: 30px;
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0;
  color: #fff;
}
.ml-world__title em { font-style: italic; color: var(--world-tint-solid, var(--lg-spring)); }
.ml-world__desc { color: var(--ml-text-dim); font-size: 13px; max-width: 28ch; }
.ml-world__progress {
  margin-top: auto;
  display: flex; flex-direction: column; gap: 6px;
}
.ml-world__progress-bar {
  height: 6px; border-radius: 4px;
  background: rgba(255,255,255,0.06);
  overflow: hidden;
}
.ml-world__progress-bar > div {
  height: 100%;
  background: var(--world-tint-solid, var(--lg-spring));
  border-radius: 4px;
  transition: width 600ms var(--ml-ease);
}
.ml-world__progress-text {
  font-size: 11px; color: var(--ml-text-dim); font-variant-numeric: tabular-nums;
  display: flex; justify-content: space-between;
}

.ml-world__levels {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  align-content: start;
}
.ml-level-pill {
  position: relative;
  background: var(--ml-bg-elev);
  border: 1px solid var(--ml-border);
  border-radius: var(--ml-radius);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: left;
  color: var(--ml-text);
  transition: transform var(--ml-dur), border-color var(--ml-dur), background var(--ml-dur);
  cursor: pointer;
  overflow: hidden;
}
.ml-level-pill:hover:not(:disabled) {
  transform: translateY(-2px);
  border-color: var(--world-tint-solid, var(--lg-spring));
  background: rgba(0,237,100,0.04);
}
.ml-level-pill[data-status="done"] {
  border-color: var(--ml-border-green);
  background: rgba(0,237,100,0.06);
}
.ml-level-pill[data-status="current"]::after {
  content: '';
  position: absolute; inset: -1px;
  border-radius: inherit;
  border: 1px solid var(--world-tint-solid, var(--lg-spring));
  box-shadow: 0 0 0 4px rgba(0,237,100,0.08);
  pointer-events: none;
}
.ml-level-pill:disabled {
  opacity: 0.5; cursor: not-allowed;
  background: rgba(255,255,255,0.02);
}
.ml-level-pill__index {
  font-family: var(--ml-font-mono);
  font-size: 10px;
  color: var(--ml-text-faint);
  letter-spacing: 0.08em;
}
.ml-level-pill__title {
  font-size: 13.5px; font-weight: 600; line-height: 1.3;
}
.ml-level-pill__foot {
  display: flex; align-items: center; gap: 6px;
  font-size: 11px;
  color: var(--ml-text-dim);
  margin-top: auto;
}
.ml-level-pill__foot .leaf {
  width: 12px; height: 12px;
}
.ml-level-pill__done {
  position: absolute; top: 10px; right: 10px;
  color: var(--lg-spring);
}
.ml-level-pill__lock { color: var(--ml-text-faint); }
.ml-level-pill--challenge {
  background: linear-gradient(135deg, rgba(94,12,158,0.32), rgba(0,104,74,0.18));
  border-color: rgba(213,188,227,0.32);
}
.ml-level-pill--challenge .ml-level-pill__title { color: #F1E2F8; }

@media (max-width: 720px) {
  .ml-world { grid-template-columns: 1fr; padding: 18px; gap: 16px; }
  .ml-hero h1 { font-size: 28px; }
}

/* ---------- Level screen ---------- */
.ml-level {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 22px;
  align-items: stretch;
}
@media (max-width: 860px) { .ml-level { grid-template-columns: 1fr; } }

.ml-level__head {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 18px;
}
.ml-level__crumb {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px;
  color: var(--ml-text-dim);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--ml-border-soft);
  border-radius: var(--ml-radius-sm);
  padding: 5px 10px;
}
.ml-level__crumb img { width: 12px; height: 12px; opacity: 0.8; }
.ml-level__crumb b { color: var(--ml-text); font-weight: 600; }
.ml-level__progress {
  flex: 1;
  height: 8px;
  background: rgba(255,255,255,0.06);
  border-radius: 99px;
  overflow: hidden;
}
.ml-level__progress > div {
  height: 100%;
  background: var(--lg-spring);
  transition: width 360ms var(--ml-ease);
}
.ml-level__close {
  background: transparent;
  border: 1px solid var(--ml-border);
  width: 32px; height: 32px;
  border-radius: var(--ml-radius-sm);
  color: var(--ml-text-dim);
  display: inline-flex; align-items: center; justify-content: center;
}
.ml-level__close:hover { color: var(--ml-text); background: rgba(255,255,255,0.04); }

.ml-pane {
  background: var(--ml-bg-3);
  border: 1px solid var(--ml-border);
  border-radius: var(--ml-radius-lg);
  padding: 22px;
  display: flex;
  flex-direction: column;
  min-height: 480px;
}
.ml-pane__label {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ml-text-faint);
  margin-bottom: 14px;
  display: flex; align-items: center; gap: 8px;
}
.ml-pane__label::after {
  content: '';
  flex: 1; height: 1px;
  background: var(--ml-border-soft);
}

.ml-prompt {
  font-family: 'Source Serif 4', 'Source Serif Pro', Georgia, serif;
  font-weight: 500;
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: #fff;
  margin: 0 0 6px;
}
.ml-prompt + .ml-prompt-sub {
  color: var(--ml-text-dim);
  font-size: 13px;
  margin-bottom: 18px;
}

/* ---------- Code / snippet ---------- */
.ml-code {
  font-family: var(--ml-font-mono);
  font-size: 13px;
  line-height: 1.7;
  background: #021923;
  border: 1px solid var(--ml-border-soft);
  border-radius: var(--ml-radius);
  padding: 16px 18px;
  color: #C1C7C6;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}
.ml-code .k { color: #FF7DBB; } /* keyword */
.ml-code .s { color: #9DD6B5; } /* string */
.ml-code .n { color: #FFC76A; } /* number */
.ml-code .p { color: #6F8390; } /* punctuation */
.ml-code .f { color: var(--lg-spring); } /* function/operator */
.ml-code .c { color: #5E6D74; font-style: italic; } /* comment */
.ml-code .id { color: #B6E1FF; } /* identifier */

.ml-blank {
  display: inline-block;
  min-width: 84px;
  padding: 2px 8px;
  margin: 0 2px;
  border: 1px dashed var(--ml-border-green);
  border-radius: 4px;
  color: var(--lg-spring);
  background: rgba(0,237,100,0.06);
  font-family: var(--ml-font-mono);
  font-size: 13px;
  text-align: center;
  cursor: pointer;
  vertical-align: baseline;
  transition: all var(--ml-dur);
}
.ml-blank[data-state="filled"] {
  background: rgba(0,237,100,0.18);
  border-style: solid;
  color: var(--lg-green-light3);
}
.ml-blank[data-state="active"] {
  border-color: var(--lg-spring);
  box-shadow: 0 0 0 3px rgba(0,237,100,0.18);
}
.ml-blank[data-state="wrong"] {
  border-color: var(--lg-red-base);
  background: rgba(219,48,48,0.16);
  color: var(--lg-red-light2);
  animation: ml-shake 240ms;
}
.ml-blank[data-state="correct"] {
  border-color: var(--lg-spring);
  background: rgba(0,237,100,0.18);
}
@keyframes ml-shake {
  10%,90% { transform: translateX(-2px); }
  30%,70% { transform: translateX(3px); }
  50% { transform: translateX(-2px); }
}

/* ---------- Token bank / draggables ---------- */
.ml-tokenbank {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 14px;
  background: rgba(255,255,255,0.02);
  border: 1px dashed var(--ml-border);
  border-radius: var(--ml-radius);
  min-height: 64px;
}
.ml-token {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 12px;
  border-radius: var(--ml-radius-sm);
  background: var(--ml-bg-elev);
  border: 1px solid var(--ml-border);
  font-family: var(--ml-font-mono);
  font-size: 13px;
  color: var(--ml-text);
  user-select: none;
  cursor: grab;
  transition: transform var(--ml-dur), box-shadow var(--ml-dur), background var(--ml-dur);
}
.ml-token:hover { background: var(--ml-bg-2); box-shadow: 0 0 0 3px rgba(0,237,100,0.10); }
.ml-token:active { cursor: grabbing; }
.ml-token[data-kind="op"]      { color: var(--lg-spring); }
.ml-token[data-kind="field"]   { color: #B6E1FF; }
.ml-token[data-kind="value"]   { color: #FFC76A; }
.ml-token[data-kind="stage"]   { color: #D5BCE3; border-color: rgba(213,188,227,0.32); }
.ml-token[data-kind="index"]   { color: var(--lg-yellow-base); border-color: rgba(255,192,16,0.32); }
.ml-token.is-dragging { opacity: 0.4; }
.ml-token.is-used    { opacity: 0.3; pointer-events: none; }

.ml-slot {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-width: 86px;
  min-height: 32px;
  padding: 4px 6px;
  border-radius: var(--ml-radius-sm);
  background: rgba(255,255,255,0.03);
  border: 1px dashed var(--ml-border);
  font-family: var(--ml-font-mono);
  font-size: 13px;
  color: var(--ml-text-faint);
  vertical-align: middle;
  transition: background var(--ml-dur), border-color var(--ml-dur);
}
.ml-slot[data-over="true"] {
  border-color: var(--lg-spring);
  background: rgba(0,237,100,0.10);
}
.ml-slot[data-filled="true"] {
  background: transparent;
  border-style: solid;
  padding: 2px 2px;
}

/* ---------- Reorder list (pipeline stages) ---------- */
.ml-reorder {
  display: flex; flex-direction: column;
  gap: 10px;
}
.ml-stage {
  display: grid;
  grid-template-columns: 28px 1fr 18px;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--ml-radius);
  background: var(--ml-bg-elev);
  border: 1px solid var(--ml-border);
  cursor: grab;
  user-select: none;
  transition: background var(--ml-dur), border-color var(--ml-dur), transform var(--ml-dur);
}
.ml-stage:hover { background: var(--ml-bg-2); }
.ml-stage.is-dragging { opacity: 0.4; transform: scale(0.98); }
.ml-stage.is-over-top { box-shadow: 0 -2px 0 0 var(--lg-spring) inset; }
.ml-stage.is-over-bot { box-shadow: 0 2px 0 0 var(--lg-spring) inset; }
.ml-stage__num {
  font-family: var(--ml-font-mono);
  font-size: 11px;
  color: var(--ml-text-faint);
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.04);
  border-radius: 6px;
}
.ml-stage__body {
  display: flex; flex-direction: column; gap: 4px;
  font-family: var(--ml-font-mono);
  font-size: 13px;
}
.ml-stage__body code { color: var(--lg-spring); }
.ml-stage__body small { color: var(--ml-text-dim); font-family: var(--ml-font-sans); font-size: 11.5px; }
.ml-stage__drag {
  color: var(--ml-text-faint);
}
.ml-stage.is-correct {
  border-color: var(--ml-border-green);
  background: rgba(0,237,100,0.06);
}

/* ---------- Preview pane ---------- */
.ml-preview {
  position: relative;
  flex: 1;
  display: flex; flex-direction: column;
  gap: 14px;
  min-height: 0;
}
.ml-preview__title {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ml-text-faint);
  display: flex; align-items: center; gap: 6px;
}
.ml-preview__title::before {
  content: ''; width: 8px; height: 8px; border-radius: 50%;
  background: var(--lg-spring);
  box-shadow: 0 0 0 4px rgba(0,237,100,0.18);
  animation: ml-pulse 2.2s infinite;
}
@keyframes ml-pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(0,237,100,0.18); }
  50%      { box-shadow: 0 0 0 6px rgba(0,237,100,0.06); }
}
.ml-preview__body {
  flex: 1;
  background: #021923;
  border: 1px solid var(--ml-border-soft);
  border-radius: var(--ml-radius);
  padding: 14px 16px;
  overflow: auto;
  font-family: var(--ml-font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  white-space: pre-wrap;
  max-height: 460px;
}

.ml-doc-result {
  display: flex; flex-direction: column; gap: 10px;
}
.ml-doc {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--ml-border-soft);
  border-left: 2px solid var(--lg-spring);
  padding: 10px 12px;
  border-radius: 4px;
  font-family: var(--ml-font-mono);
  font-size: 12.5px;
  color: #C1C7C6;
  white-space: pre-wrap;
}
.ml-doc.is-removed {
  opacity: 0.4;
  border-left-color: var(--lg-red-base);
  text-decoration: line-through;
}
.ml-empty {
  color: var(--ml-text-faint);
  font-style: italic;
  font-family: var(--ml-font-sans);
  font-size: 13px;
  padding: 12px 0;
}

/* ---------- Concept card (collapsible) ---------- */
.ml-concept {
  margin-top: 18px;
  border: 1px solid var(--ml-border);
  border-radius: var(--ml-radius);
  background: rgba(255,255,255,0.025);
  overflow: hidden;
}
.ml-concept__toggle {
  width: 100%;
  background: transparent;
  border: 0;
  color: var(--ml-text);
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px;
  text-align: left;
  font-size: 13px;
  font-weight: 600;
}
.ml-concept__toggle .chev { transition: transform var(--ml-dur); color: var(--ml-text-dim); }
.ml-concept[data-open="true"] .ml-concept__toggle .chev { transform: rotate(180deg); }
.ml-concept__body {
  padding: 0 16px 16px;
  color: var(--ml-text-dim);
  font-size: 13px;
  line-height: 1.6;
  display: none;
}
.ml-concept[data-open="true"] .ml-concept__body { display: block; }
.ml-concept__body code,
.ml-prompt-sub code {
  background: rgba(0,237,100,0.08);
  color: var(--lg-spring);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 12px;
}
.ml-concept__docs {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px;
  margin-top: 12px; padding-top: 10px;
  border-top: 1px solid var(--ml-border-soft);
  font-size: 12px;
}
.ml-concept__docs span { color: var(--ml-text-faint); }
.ml-concept__docs a { color: var(--lg-spring); text-decoration: none; font-weight: 600; }
.ml-concept__docs a:hover { text-decoration: underline; }

/* Plain-language gloss under explain() jargon (IXSCAN / COLLSCAN) */
.ml-explain__gloss {
  margin-top: 6px;
  color: var(--ml-text-faint);
  font-size: 11px; line-height: 1.4;
}

/* Full statement assembled from a solved reorder exercise */
.ml-solved-query { margin-bottom: 12px; }
.ml-solved-query__label {
  margin-bottom: 6px;
  color: var(--ml-text-faint);
  font-size: 10px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
}
.ml-solved-query pre {
  margin: 0;
  padding: 12px 14px;
  overflow-x: auto;
  background: rgba(0,0,0,0.25);
  border: 1px solid var(--ml-border-soft);
  border-radius: var(--ml-radius-sm);
  font-family: var(--ml-font-mono);
  font-size: 12px; line-height: 1.55;
  white-space: pre;
}

/* ---------- Feedback footer ---------- */
.ml-feedback {
  margin-top: 18px;
  border-radius: var(--ml-radius);
  border: 1px solid var(--ml-border);
  padding: 14px 16px;
  display: flex; align-items: flex-start; gap: 12px;
  background: var(--ml-bg-2);
}
.ml-feedback[data-state="correct"] {
  background: rgba(0,237,100,0.08);
  border-color: var(--ml-border-green);
}
.ml-feedback[data-state="wrong"] {
  background: rgba(219,48,48,0.10);
  border-color: rgba(219,48,48,0.32);
}
.ml-feedback__icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-weight: 700;
}
.ml-feedback[data-state="correct"] .ml-feedback__icon { background: var(--lg-spring); color: var(--lg-black); }
.ml-feedback[data-state="wrong"] .ml-feedback__icon { background: var(--lg-red-base); color: #fff; }
.ml-feedback__body { flex: 1; }
.ml-feedback__title { font-size: 14px; font-weight: 600; color: #fff; }
.ml-feedback__msg { font-size: 13px; color: var(--ml-text-dim); margin-top: 2px; }
.ml-feedback__diff {
  margin-top: 10px;
  font-family: var(--ml-font-mono);
  font-size: 12.5px;
  background: rgba(0,0,0,0.32);
  padding: 8px 10px;
  border-radius: 6px;
  white-space: pre-wrap;
}
.ml-feedback__diff .add { color: var(--lg-spring); }
.ml-feedback__diff .rem { color: var(--lg-red-light2); text-decoration: line-through; }

.ml-actions {
  display: flex; gap: 10px;
  margin-top: 18px;
  justify-content: space-between;
  flex-wrap: wrap;
}
.ml-actions__left, .ml-actions__right { display: flex; gap: 10px; }

/* ---------- Tooltip (inline hints on keywords) ---------- */
.ml-hint {
  position: relative;
  cursor: help;
  border-bottom: 1px dashed rgba(0,237,100,0.45);
  color: var(--lg-spring);
}
.ml-hint::after {
  content: attr(data-hint);
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: #02333F;
  color: var(--ml-text);
  border: 1px solid var(--ml-border-green);
  font-family: var(--ml-font-sans);
  font-size: 11.5px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0;
  padding: 8px 10px;
  border-radius: 6px;
  white-space: normal;
  width: max-content;
  max-width: 260px;
  box-shadow: var(--ml-shadow-2);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--ml-dur), transform var(--ml-dur);
  z-index: 5;
}
.ml-hint::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--ml-border-green);
  opacity: 0;
  transition: opacity var(--ml-dur);
}
.ml-hint:hover::after, .ml-hint:focus::after,
.ml-hint:hover::before, .ml-hint:focus::before {
  opacity: 1; transform: translateX(-50%) translateY(0);
}

/* ---------- Leaderboard ---------- */
.ml-leaderboard {
  max-width: 720px;
  margin: 0 auto;
}
.ml-leaderboard h2 {
  font-family: 'Source Serif 4', Georgia, serif;
  font-weight: 500;
  font-size: 28px;
  letter-spacing: -0.015em;
  margin: 0 0 6px;
}
.ml-leaderboard p { color: var(--ml-text-dim); margin: 0 0 22px; }
.ml-lb-list { display: flex; flex-direction: column; gap: 8px; }
.ml-lb-row {
  display: grid;
  grid-template-columns: 34px 1fr auto auto;
  gap: 14px;
  align-items: center;
  padding: 12px 16px;
  background: var(--ml-bg-3);
  border: 1px solid var(--ml-border);
  border-radius: var(--ml-radius);
}
.ml-lb-row[data-me="true"] {
  border-color: var(--ml-border-green);
  background: rgba(0,237,100,0.06);
}
.ml-lb-row--status {
  display: block;
  text-align: center;
  color: var(--ml-text-dim);
  font-style: italic;
}
.ml-lb-row--status .ml-lb-name { font-weight: 500; }
.ml-lb-rank {
  font-family: var(--ml-font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--ml-text-dim);
  text-align: center;
}
.ml-lb-row[data-rank="1"] .ml-lb-rank { color: var(--lg-yellow-base); }
.ml-lb-row[data-rank="2"] .ml-lb-rank { color: var(--lg-gray-light1); }
.ml-lb-row[data-rank="3"] .ml-lb-rank { color: #D88E5A; }
.ml-lb-name { font-weight: 600; }
.ml-lb-leaves { font-size: 12px; color: var(--ml-text-dim); display: inline-flex; align-items: center; gap: 4px; }
.ml-lb-xp { font-family: var(--ml-font-mono); font-weight: 600; color: var(--lg-spring); }

.ml-invite {
  margin-top: 24px;
  padding: 22px;
  border-radius: var(--ml-radius-lg);
  border: 1px dashed var(--ml-border-green);
  background: rgba(0,237,100,0.04);
  text-align: center;
}
.ml-invite h3 { margin: 0 0 6px; font-size: 17px; }
.ml-invite p { margin: 0 0 14px; color: var(--ml-text-dim); }

/* Leaderboard gate — shown until the learner enters name + company */
.ml-lb-gate .ml-invite { margin-top: 0; }
.ml-lb-gate__panel .ml-form-grid { text-align: left; }
.ml-lb-gate__panel .ml-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.ml-lb-gate__link {
  display: block;
  margin: 16px auto 0;
  padding: 4px 8px;
  border: 0;
  background: none;
  color: var(--ml-text-dim);
  font: inherit;
  font-size: 13px;
  text-decoration: underline;
  cursor: pointer;
}
.ml-lb-gate__link:hover { color: var(--lg-spring); }
@media (max-width: 540px) {
  .ml-lb-gate__panel .ml-form-grid { grid-template-columns: 1fr; }
}

/* ---------- Event leaderboards ---------- */
.ml-lb-tabs {
  display: inline-flex;
  gap: 4px;
  margin-bottom: 16px;
  padding: 4px;
  border: 1px solid var(--ml-border);
  border-radius: 999px;
  background: rgba(255,255,255,0.03);
}
.ml-lb-tabs button {
  padding: 6px 14px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--ml-text-dim);
  font: inherit; font-size: 12px; font-weight: 600;
  cursor: pointer;
  transition: color var(--ml-dur), background var(--ml-dur);
}
.ml-lb-tabs button:hover { color: var(--ml-text); }
.ml-lb-tabs button[aria-selected="true"] { color: var(--lg-black); background: var(--lg-spring); }
.ml-lb-tabs button:focus-visible { outline: 2px solid var(--lg-spring); outline-offset: 2px; }

.ml-invite-link {
  display: flex;
  gap: 8px;
  max-width: 560px;
  margin: 0 auto;
}
.ml-invite-link input {
  flex: 1;
  min-width: 0;
  min-height: 38px;
  padding: 8px 12px;
  border-radius: var(--ml-radius-sm);
  border: 1px solid var(--ml-border);
  background: rgba(0,30,43,0.72);
  color: var(--ml-text);
  font-family: var(--ml-font-mono);
  font-size: 12.5px;
  outline: none;
}
.ml-invite-link input:focus { border-color: var(--ml-border-green); }

.ml-event-banner {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 0 0 18px;
  padding: 14px 16px;
  border-radius: var(--ml-radius-lg);
  border: 1px solid var(--ml-border-green);
  background: rgba(0,237,100,0.07);
}
.ml-event-banner > div { display: grid; gap: 2px; }
.ml-event-banner span { color: var(--ml-text-dim); font-size: 13px; }

.ml-assignment-chip--event { margin-left: 10px; }
.ml-event-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.ml-field select {
  width: 100%;
  min-height: 42px;
  border-radius: var(--ml-radius-sm);
  border: 1px solid var(--ml-border);
  background: rgba(0,30,43,0.72);
  color: var(--ml-text);
  padding: 10px 12px;
  font: inherit;
  outline: none;
}
.ml-field select:focus { border-color: var(--ml-border-green); box-shadow: 0 0 0 3px rgba(0,237,100,0.13); }

.ml-admin__form { display: grid; gap: 16px; margin-bottom: 20px; }
.ml-admin__form .ml-form-grid { margin-bottom: 0; }
.ml-admin__form .ml-event-actions { justify-content: flex-end; }
.ml-admin__error {
  padding: 10px 12px;
  border-radius: var(--ml-radius-sm);
  border: 1px solid rgba(255,105,96,0.45);
  background: rgba(255,105,96,0.08);
  color: #FF9F98;
  font-size: 13px;
}
.ml-admin__events { margin-top: 20px; }
.ml-admin__event {
  display: grid;
  gap: 10px;
  padding: 14px 16px;
  background: var(--ml-bg-3);
  border: 1px solid var(--ml-border);
  border-radius: var(--ml-radius);
}
.ml-admin__event > div:first-child { display: grid; gap: 2px; }
.ml-admin__event small { color: var(--ml-text-dim); font-size: 12px; text-transform: capitalize; }
.ml-admin__event .ml-invite-link { margin: 0; max-width: none; }

@media (max-width: 540px) {
  .ml-invite-link { flex-direction: column; }
  .ml-assignment-chip--event { margin-left: 0; }
}

/* ---------- Drop targets (for index world) ---------- */
.ml-collection {
  display: flex; flex-direction: column; gap: 6px;
  padding: 14px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--ml-border);
  border-radius: var(--ml-radius);
}
.ml-collection__name {
  font-family: var(--ml-font-mono);
  font-size: 12.5px;
  color: var(--lg-spring);
  margin-bottom: 6px;
}
.ml-field-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 6px;
  background: var(--ml-bg-elev);
  border: 1px solid var(--ml-border-soft);
  font-family: var(--ml-font-mono);
  font-size: 12.5px;
}
.ml-field-row__name { color: #B6E1FF; }
.ml-field-row__type { color: var(--ml-text-faint); font-size: 11px; }
.ml-field-row__drop {
  min-width: 110px; min-height: 28px;
  border-radius: 4px;
  border: 1px dashed var(--ml-border);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px;
  color: var(--ml-text-faint);
  background: rgba(255,255,255,0.02);
  padding: 2px 8px;
}
.ml-field-row__drop[data-over="true"] {
  border-color: var(--lg-spring);
  background: rgba(0,237,100,0.08);
}
.ml-field-row__drop[data-filled="true"] {
  border-style: solid;
  color: var(--lg-yellow-base);
  border-color: rgba(255,192,16,0.42);
  background: rgba(255,192,16,0.08);
}

/* Explain plan card */
.ml-explain {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 8px;
}
.ml-explain__col {
  padding: 12px;
  border-radius: 6px;
  border: 1px solid var(--ml-border-soft);
  background: rgba(0,0,0,0.18);
}
.ml-explain__col h5 {
  margin: 0 0 6px; font-size: 11px; color: var(--ml-text-faint);
  text-transform: uppercase; letter-spacing: 0.1em; font-weight: 600;
}
.ml-explain__col .stat {
  font-family: var(--ml-font-mono);
  font-size: 18px;
  color: var(--lg-spring);
}
.ml-explain__col[data-bad="true"] .stat { color: var(--lg-red-light2); }
.ml-explain__col .sub {
  font-size: 11.5px; color: var(--ml-text-dim);
}

/* ---------- Celebrate animation ---------- */
.ml-celebrate {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,30,43,0.6);
  backdrop-filter: blur(8px);
  z-index: 100;
  animation: ml-fade-in 200ms var(--ml-ease);
}
@keyframes ml-fade-in { from { opacity: 0; } to { opacity: 1; } }
.ml-celebrate__panel {
  background: var(--ml-bg-3);
  border: 1px solid var(--ml-border-green);
  box-shadow: 0 24px 48px -8px rgba(0,0,0,0.55), 0 0 0 4px rgba(0,237,100,0.10);
  border-radius: var(--ml-radius-xl);
  padding: 36px 44px;
  text-align: center;
  max-width: 420px;
}
.ml-celebrate__leaf {
  width: 72px; height: 72px;
  margin: 0 auto 16px;
  animation: ml-pop 600ms var(--ml-ease);
}
@keyframes ml-pop {
  0%   { transform: scale(0.2) rotate(-30deg); opacity: 0; }
  60%  { transform: scale(1.15) rotate(8deg); opacity: 1; }
  100% { transform: scale(1) rotate(0); }
}
.ml-celebrate__title {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 26px; font-weight: 500; margin: 0 0 8px;
}
.ml-celebrate__sub { color: var(--ml-text-dim); margin: 0 0 18px; font-size: 14px; }
.ml-celebrate__reward {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px;
  background: rgba(0,237,100,0.10);
  border: 1px solid var(--ml-border-green);
  border-radius: var(--ml-radius-sm);
  color: var(--lg-spring);
  font-weight: 600;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

/* ---------- World completion Skill Badges ---------- */
.ml-skill-badges {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  background: rgba(0,30,43,0.72);
  backdrop-filter: blur(8px);
  z-index: 100;
  animation: ml-fade-in 200ms var(--ml-ease);
}
.ml-skill-badges__panel {
  width: min(100%, 560px);
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  padding: 32px;
  text-align: center;
  background: var(--ml-bg-3);
  border: 1px solid var(--ml-border-green);
  border-radius: var(--ml-radius-xl);
  box-shadow: 0 24px 48px -8px rgba(0,0,0,0.55), 0 0 0 4px rgba(0,237,100,0.10);
}
.ml-skill-badges__icon {
  width: 64px; height: 64px;
  margin: 0 auto 14px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,237,100,0.10);
  border: 1px solid var(--ml-border-green);
  border-radius: 50%;
}
.ml-skill-badges__eyebrow {
  margin-bottom: 6px;
  color: var(--lg-spring);
  font-size: 10px; font-weight: 600;
  letter-spacing: 0.18em;
}
.ml-skill-badges h2 {
  margin: 0 0 8px;
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 28px; font-weight: 500;
  letter-spacing: -0.015em;
}
.ml-skill-badges p { margin: 0 0 20px; color: var(--ml-text-dim); font-size: 14px; }
.ml-skill-badges__list {
  display: grid;
  gap: 8px;
  margin: 0 0 22px;
  text-align: left;
}
.ml-skill-badges__link {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px 14px;
  color: var(--ml-text);
  background: rgba(255,255,255,0.035);
  border: 1px solid var(--ml-border-soft);
  border-radius: var(--ml-radius-sm);
  font-size: 13px; font-weight: 600;
  text-decoration: none;
  transition: border-color 150ms var(--ml-ease), background 150ms var(--ml-ease), color 150ms var(--ml-ease);
}
.ml-skill-badges__link:hover { color: var(--lg-spring); background: rgba(0,237,100,0.08); border-color: var(--ml-border-green); }
.ml-skill-badges__link:focus-visible { outline: 2px solid var(--lg-spring); outline-offset: 2px; }
.ml-skill-badges__link > span:last-child { color: var(--lg-spring); font-size: 16px; }
.ml-skill-badges__title { display: flex; flex-direction: column; gap: 2px; }
.ml-skill-badges__title small {
  color: var(--ml-text-dim);
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
}
.ml-skill-badges__xp {
  display: inline-block;
  margin: -6px 0 20px;
  padding: 4px 12px;
  color: var(--lg-spring);
  background: rgba(0,237,100,0.10);
  border: 1px solid var(--ml-border-green);
  border-radius: 999px;
  font-size: 13px; font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* Re-open a completed world's Skill Badges from its map banner */
.ml-trail-banner__badges {
  margin-top: 14px;
  padding: 6px 14px;
  color: var(--lg-spring);
  background: rgba(0,237,100,0.08);
  border: 1px solid var(--ml-border-green);
  border-radius: 999px;
  font: inherit; font-size: 12px; font-weight: 600;
  cursor: pointer;
  transition: background 150ms var(--ml-ease);
}
.ml-trail-banner__badges:hover { background: rgba(0,237,100,0.16); }
.ml-trail-banner__badges:focus-visible { outline: 2px solid var(--lg-spring); outline-offset: 2px; }

@media (max-width: 540px) {
  .ml-skill-badges { padding: 12px; }
  .ml-skill-badges__panel { max-height: calc(100vh - 24px); padding: 24px 18px; }
  .ml-skill-badges h2 { font-size: 25px; }
}

/* Confetti */
.ml-confetti {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 101;
  overflow: hidden;
}
.ml-confetti span {
  position: absolute;
  width: 8px; height: 12px;
  top: -20px;
  border-radius: 1px;
  animation: ml-fall 1600ms ease-in forwards;
}
@keyframes ml-fall {
  0%   { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0; }
}

/* ---------- Challenge mode ---------- */
.ml-challenge-card {
  max-width: 520px;
  margin: 40px auto 0;
  padding: 36px;
  text-align: center;
  background: var(--ml-bg-3);
  border: 1px solid var(--ml-border);
  border-radius: var(--ml-radius-xl);
  box-shadow: var(--ml-shadow-1);
}
.ml-challenge-card__icon {
  width: 80px; height: 80px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: rgba(255,192,16,0.10);
  border: 1px solid rgba(255,192,16,0.32);
  display: inline-flex; align-items: center; justify-content: center;
}
.ml-challenge-card__badge {
  font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--lg-yellow-base); font-weight: 600;
  margin-bottom: 6px;
}
.ml-challenge-card h2 {
  font-family: 'Source Serif 4', Georgia, serif;
  font-weight: 500;
  font-size: 30px;
  letter-spacing: -0.015em;
  margin: 0 0 10px;
}
.ml-challenge-card p { color: var(--ml-text-dim); margin: 0 0 16px; }
.ml-challenge-card__rules {
  display: inline-flex; gap: 8px;
  padding: 8px 14px;
  background: rgba(255,255,255,0.04);
  border-radius: var(--ml-radius-sm);
  border: 1px solid var(--ml-border-soft);
  font-family: var(--ml-font-mono);
  font-size: 12px;
  color: var(--ml-text-dim);
}
.ml-challenge-card__score {
  margin: 18px 0 0;
  font-family: var(--ml-font-mono);
  color: var(--lg-spring);
}
.ml-challenge-card__score .num {
  font-size: 36px; font-weight: 600;
}

.ml-challenge {
  display: flex; flex-direction: column; gap: 18px;
}
.ml-challenge.is-shake { animation: ml-shake 280ms; }

.ml-challenge__hud {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 18px;
  background: var(--ml-bg-3);
  border: 1px solid var(--ml-border);
  border-radius: var(--ml-radius);
  margin-bottom: 8px;
}
.ml-challenge__crumb {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--ml-text-dim);
}
.ml-challenge__crumb b { color: var(--ml-text); }
.ml-challenge__progress {
  display: flex; gap: 4px;
  margin-left: 8px;
}
.ml-challenge__progress span {
  width: 28px; height: 6px; border-radius: 3px;
  background: rgba(255,255,255,0.08);
  transition: background var(--ml-dur);
}
.ml-challenge__progress span[data-state="done"]   { background: var(--lg-spring); }
.ml-challenge__progress span[data-state="active"] { background: var(--lg-yellow-base); animation: ml-pulse 1.6s infinite; }
.ml-challenge__timer {
  margin-left: auto;
  display: inline-flex; align-items: baseline; gap: 4px;
  padding: 6px 14px;
  background: rgba(255,192,16,0.08);
  border: 1px solid rgba(255,192,16,0.32);
  border-radius: var(--ml-radius-sm);
  color: var(--lg-yellow-base);
  font-family: var(--ml-font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.ml-challenge__timer.is-low {
  background: rgba(219,48,48,0.10);
  border-color: rgba(219,48,48,0.42);
  color: var(--lg-red-light2);
  animation: ml-pulse 0.9s infinite;
}
.ml-challenge__score {
  display: inline-flex; align-items: baseline; gap: 4px;
  font-family: var(--ml-font-mono);
  color: var(--lg-spring);
  font-weight: 600;
}
.ml-challenge__score small { color: var(--ml-text-faint); font-size: 11px; font-weight: 500; }

@media (max-width: 720px) {
  .ml-challenge__hud { flex-wrap: wrap; padding: 10px 12px; gap: 8px; }
  .ml-challenge__progress { order: 3; flex-basis: 100%; }
}
.ml-divider { height: 1px; background: var(--ml-border-soft); margin: 16px 0; }
.ml-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ml-spacer { flex: 1; }

/* ── Industry picker ────────────────────────────────────────── */
.ml-industry-picker {
  margin-top: 16px;
  padding: 12px 16px;
  background: var(--ml-card-bg, rgba(255,255,255,0.04));
  border: 1px solid var(--ml-border-soft);
  border-radius: 10px;
}
.ml-industry-select {
  font-family: var(--ml-font-sans);
  font-size: 13px;
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid var(--ml-border-soft);
  background: var(--lg-black, #001E2B);
  color: var(--ml-text-main, #E3FCF7);
  cursor: pointer;
  min-width: 160px;
}
.ml-industry-select:focus {
  outline: 2px solid var(--lg-spring);
  outline-offset: 2px;
}

/* ── AHA moment card ────────────────────────────────────────── */
.ml-aha-moment {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin: 16px 0;
  padding: 14px 16px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(0,237,100,0.08) 0%, rgba(1,107,248,0.06) 100%);
  border: 1px solid rgba(0,237,100,0.22);
  animation: ml-aha-appear 0.5s ease-out;
}
.ml-aha-moment__icon {
  font-size: 22px;
  flex-shrink: 0;
  animation: ml-aha-bounce 0.6s ease-out;
}
.ml-aha-moment__content {
  flex: 1;
  min-width: 0;
}
.ml-aha-moment__title {
  font-family: var(--ml-font-sans);
  font-size: 13px;
  font-weight: 700;
  color: var(--lg-spring);
  margin-bottom: 4px;
}
.ml-aha-moment__message {
  font-family: var(--ml-font-sans);
  font-size: 12.5px;
  color: var(--ml-text-dim);
  line-height: 1.5;
}

/* ── Explicit hint reveal card ───────────────────────────────── */
.ml-hint-card {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin: 16px 0;
  padding: 14px 16px;
  border-radius: 10px;
  background: rgba(255,192,16,0.075);
  border: 1px solid rgba(255,192,16,0.24);
}
.ml-hint-card__icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: rgba(0,237,100,0.08);
  border: 1px solid var(--ml-border-green);
}
.ml-hint-card__body {
  min-width: 0;
  flex: 1;
}
.ml-hint-card__title {
  color: var(--lg-yellow-base);
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 6px;
}
.ml-hint-card ol {
  margin: 0;
  padding-left: 18px;
  color: var(--ml-text-dim);
  font-size: 12.5px;
  line-height: 1.55;
}
.ml-hint-card li + li { margin-top: 5px; }

@keyframes ml-aha-appear {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes ml-aha-bounce {
  0%   { transform: scale(0.4) rotate(-10deg); opacity: 0; }
  50%  { transform: scale(1.2) rotate(5deg); }
  100% { transform: scale(1) rotate(0deg); opacity: 1; }
}