/* ---------- Tokens ---------- */
:root {
  --paper: #f4ede0;
  --paper-2: #ece2cb;
  --paper-3: #e0d3b3;
  --ink: #1f1d1a;
  --ink-soft: #4a463f;
  --ink-faded: #8a857b;
  --ink-light: #b8b2a5;
  --lego-red: #c91a09;
  --lego-yellow: #f5cd2f;
  --lego-blue: #0055bf;
  --lego-green: #237841;
  --lego-orange: #fe8a18;
  --lego-white: #f4f4f4;
  --shadow: 2px 3px 0 rgba(31,29,26,0.85);
  --shadow-sm: 1px 2px 0 rgba(31,29,26,0.7);
}

body.dark {
  --paper: #1a1714;
  --paper-2: #221e1a;
  --paper-3: #2a2520;
  --ink: #f0e7d2;
  --ink-soft: #cfc6b3;
  --ink-faded: #8a857b;
  --ink-light: #56524a;
  --shadow: 2px 3px 0 rgba(0,0,0,0.7);
  --shadow-sm: 1px 2px 0 rgba(0,0,0,0.5);
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  font-family: 'Patrick Hand', 'Kalam', system-ui, sans-serif;
  background: var(--paper);
  color: var(--ink);
  min-height: 100vh;
  font-size: 17px;
  line-height: 1.25;
}

body {
  background-image:
    radial-gradient(ellipse at 50% -10%, transparent 60%, rgba(0,0,0,0.05) 100%),
    repeating-linear-gradient(0deg, transparent 0, transparent 28px, rgba(31,29,26,0.035) 28px, rgba(31,29,26,0.035) 29px);
}

body.dark {
  background-image:
    radial-gradient(ellipse at 50% -10%, transparent 60%, rgba(0,0,0,0.4) 100%),
    repeating-linear-gradient(0deg, transparent 0, transparent 28px, rgba(255,255,255,0.025) 28px, rgba(255,255,255,0.025) 29px);
}

h1, h2, h3, h4 { font-family: 'Caveat', 'Patrick Hand', cursive; font-weight: 700; margin: 0; }

/* ---------- Top tabs ---------- */
.shell-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: flex-end; gap: 0;
  padding: 16px 24px 0;
  background: linear-gradient(to bottom, var(--paper) 70%, transparent);
  border-bottom: 2px solid var(--ink);
  flex-wrap: wrap;
}
.shell-brand {
  font-family: 'Caveat', cursive;
  font-size: 32px; font-weight: 700;
  margin-right: 20px; padding-bottom: 10px;
  display: flex; align-items: center; gap: 8px;
}
.shell-brand .brick-logo {
  width: 28px; height: 22px; background: var(--lego-red);
  border: 2px solid var(--ink);
  position: relative; box-shadow: var(--shadow-sm);
  border-radius: 2px 4px 2px 3px;
}
.shell-brand .brick-logo::before, .shell-brand .brick-logo::after {
  content: ''; position: absolute; top: -6px;
  width: 6px; height: 6px; background: var(--lego-red);
  border: 2px solid var(--ink); border-radius: 50%;
}
.shell-brand .brick-logo::before { left: 4px; }
.shell-brand .brick-logo::after { right: 4px; }

.tab-row { display: flex; gap: 4px; flex-wrap: wrap; }
.tab {
  font-family: 'Patrick Hand', cursive;
  font-size: 18px;
  padding: 10px 18px 8px;
  background: var(--paper-2);
  border: 2px solid var(--ink);
  border-bottom: none;
  border-radius: 12px 14px 0 0 / 14px 12px 0 0;
  cursor: pointer;
  margin-bottom: -2px;
  transform: rotate(-0.4deg);
  box-shadow: 1px -1px 0 rgba(0,0,0,0.1);
  color: var(--ink-soft);
  position: relative;
}
.tab:nth-child(2n) { transform: rotate(0.3deg); }
.tab:hover { background: var(--paper-3); color: var(--ink); }
.tab.active {
  background: var(--paper);
  color: var(--ink);
  font-weight: 700;
  z-index: 2;
  padding-top: 12px;
  transform: rotate(0deg);
}
.tab .tab-num {
  display: inline-block; margin-right: 6px;
  background: var(--ink); color: var(--paper);
  border-radius: 50%; width: 22px; height: 22px;
  text-align: center; font-size: 14px; line-height: 22px;
  font-family: 'Kalam', sans-serif;
}
.tab.active .tab-num { background: var(--lego-red); color: var(--lego-white); }

.shell-meta {
  margin-left: auto; padding-bottom: 12px;
  font-family: 'Caveat', cursive; font-size: 20px;
  color: var(--ink-faded);
  display: flex; align-items: center; gap: 12px;
}
.shell-meta .stamp {
  display: inline-block;
  border: 2px solid var(--lego-red);
  color: var(--lego-red);
  padding: 2px 10px;
  transform: rotate(-3deg);
  font-size: 16px; font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-radius: 4px 6px 4px 5px;
}

/* ---------- Page container ---------- */
.page {
  max-width: 1380px;
  margin: 24px auto 60px;
  padding: 0 24px;
}
.page-intro {
  display: flex; gap: 24px; align-items: flex-start;
  margin-bottom: 20px;
}
.page-intro h2 {
  font-size: 38px;
  line-height: 1;
}
.page-intro .desc {
  font-size: 17px; color: var(--ink-soft); max-width: 540px;
  font-family: 'Kalam', sans-serif; font-weight: 300;
}
.page-intro .meta {
  margin-left: auto;
  font-family: 'Caveat', cursive; font-size: 20px;
  color: var(--ink-faded);
  text-align: right;
  line-height: 1.1;
}

/* ---------- Sketch primitives ---------- */
.sk-box {
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 8px 12px 6px 10px / 10px 6px 12px 8px;
  position: relative;
  box-shadow: var(--shadow);
}
.sk-box.alt { border-radius: 14px 6px 10px 8px / 6px 12px 8px 14px; }
.sk-box.thin { box-shadow: var(--shadow-sm); }

.sk-strip {
  border: 2px solid var(--ink);
  background: var(--paper-2);
  padding: 8px 14px;
  border-radius: 24px 30px 26px 28px / 28px 24px 30px 26px;
  font-family: 'Patrick Hand', cursive;
  display: inline-flex; gap: 10px; align-items: center;
  box-shadow: var(--shadow-sm);
}

.sk-btn {
  font-family: 'Patrick Hand', cursive;
  font-size: 16px;
  padding: 6px 14px;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 8px 12px 6px 10px / 10px 6px 12px 8px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  color: var(--ink);
}
.sk-btn:hover { background: var(--paper-2); transform: translate(-1px, -1px); box-shadow: 2px 3px 0 rgba(31,29,26,0.8); }
.sk-btn.primary { background: var(--lego-yellow); }
.sk-btn.danger { background: var(--lego-red); color: var(--lego-white); }
.sk-btn.go { background: var(--lego-blue); color: var(--lego-white); }
.sk-btn.sm { font-size: 14px; padding: 3px 9px; }
.sk-btn.lg { font-size: 22px; padding: 12px 24px; }

.sk-chip {
  font-family: 'Patrick Hand', cursive;
  font-size: 15px;
  padding: 2px 10px;
  background: var(--paper-2);
  border: 2px solid var(--ink);
  border-radius: 12px;
  display: inline-block;
}
.sk-chip.on { background: var(--ink); color: var(--paper); }
.sk-chip.red { background: var(--lego-red); color: var(--lego-white); }

.sk-label {
  font-family: 'Caveat', cursive;
  font-size: 18px;
  color: var(--ink-soft);
  font-weight: 600;
}
.sk-label.angled { transform: rotate(-2deg); display: inline-block; }
.sk-label.tiny { font-size: 14px; color: var(--ink-faded); font-family: 'Kalam', sans-serif; }

.sk-divider {
  border: 0; border-top: 2px dashed var(--ink-light);
  margin: 12px 0;
}

/* Annotation arrow */
.sk-anno {
  position: absolute;
  font-family: 'Caveat', cursive;
  font-size: 19px;
  color: var(--lego-red);
  font-weight: 600;
  pointer-events: none;
  display: flex; align-items: center; gap: 4px;
  z-index: 5;
}
.sk-anno svg { overflow: visible; }

/* Stud */
.stud {
  width: 10px; height: 10px;
  background: currentColor;
  border-radius: 50%;
  border: 1.5px solid var(--ink);
  display: inline-block;
}
.stud.sm { width: 6px; height: 6px; border-width: 1px; }

/* Brick - flat top-down */
.brick {
  display: inline-flex;
  align-items: center; justify-content: space-evenly;
  border: 2px solid var(--ink);
  border-radius: 3px 4px 3px 4px;
  padding: 4px 6px;
  gap: 4px;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.brick .stud { background: rgba(255,255,255,0.6); border-color: var(--ink); }

/* Placeholder hatch */
.hatch {
  background-image: repeating-linear-gradient(
    -45deg,
    transparent 0, transparent 6px,
    rgba(31,29,26,0.18) 6px, rgba(31,29,26,0.18) 7px
  );
}
body.dark .hatch {
  background-image: repeating-linear-gradient(
    -45deg,
    transparent 0, transparent 6px,
    rgba(240,231,210,0.15) 6px, rgba(240,231,210,0.15) 7px
  );
}
.hatch-cross {
  background-image:
    repeating-linear-gradient(-45deg, transparent 0, transparent 8px, rgba(31,29,26,0.15) 8px, rgba(31,29,26,0.15) 9px),
    repeating-linear-gradient(45deg, transparent 0, transparent 8px, rgba(31,29,26,0.15) 8px, rgba(31,29,26,0.15) 9px);
}

/* Iso grid floor (for 3D viewport) */
.iso-floor {
  background-color: var(--paper-2);
  background-image:
    linear-gradient(60deg, rgba(31,29,26,0.12) 1px, transparent 1px),
    linear-gradient(-60deg, rgba(31,29,26,0.12) 1px, transparent 1px);
  background-size: 36px 22px;
}
body.dark .iso-floor {
  background-image:
    linear-gradient(60deg, rgba(240,231,210,0.12) 1px, transparent 1px),
    linear-gradient(-60deg, rgba(240,231,210,0.12) 1px, transparent 1px);
}

/* Top-down grid floor */
.grid-floor {
  background-color: var(--paper-2);
  background-image:
    linear-gradient(rgba(31,29,26,0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31,29,26,0.16) 1px, transparent 1px);
  background-size: 26px 26px;
}
body.dark .grid-floor {
  background-image:
    linear-gradient(rgba(240,231,210,0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(240,231,210,0.12) 1px, transparent 1px);
}

/* ---------- Layouts ---------- */
.wf-frame {
  background: var(--paper);
  border: 2.5px solid var(--ink);
  border-radius: 14px 18px 10px 16px / 16px 10px 18px 14px;
  box-shadow: 4px 5px 0 rgba(31,29,26,0.85);
  overflow: hidden;
  position: relative;
}
body.dark .wf-frame { box-shadow: 4px 5px 0 rgba(0,0,0,0.7); }

.wf-titlebar {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 18px;
  border-bottom: 2px solid var(--ink);
  background: var(--paper-2);
  flex-wrap: wrap;
}
.wf-titlebar .lights { display: flex; gap: 6px; }
.wf-titlebar .lights span {
  width: 12px; height: 12px; border-radius: 50%;
  border: 1.5px solid var(--ink); display: block;
}
.wf-titlebar .lights span:nth-child(1) { background: #ff6058; }
.wf-titlebar .lights span:nth-child(2) { background: #ffbd2e; }
.wf-titlebar .lights span:nth-child(3) { background: #27c93f; }
.wf-titlebar .file-name {
  font-family: 'Caveat', cursive; font-size: 22px;
  color: var(--ink-soft); margin-left: 8px;
}

.wf-toolbar {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 18px;
  border-bottom: 2px solid var(--ink);
  background: var(--paper);
  flex-wrap: wrap;
}
.wf-toolbar .divider {
  width: 0; height: 26px; border-left: 2px dashed var(--ink-light);
}
.wf-toolbar .seg {
  display: inline-flex; border: 2px solid var(--ink);
  border-radius: 10px 14px 10px 12px;
  overflow: hidden; box-shadow: var(--shadow-sm);
}
.wf-toolbar .seg > span {
  padding: 4px 12px; cursor: pointer;
  background: var(--paper);
  font-family: 'Patrick Hand', cursive;
  border-right: 2px solid var(--ink);
}
.wf-toolbar .seg > span:last-child { border-right: none; }
.wf-toolbar .seg > span.on { background: var(--lego-yellow); font-weight: 700; }

/* Main split */
.wf-body { display: grid; min-height: 540px; }

/* Left rail tools */
.tool-rail {
  display: flex; flex-direction: column; gap: 8px;
  padding: 12px 8px;
  background: var(--paper-2);
  border-right: 2px solid var(--ink);
  align-items: center;
}
.tool-rail .tool {
  width: 44px; height: 44px;
  border: 2px solid var(--ink); background: var(--paper);
  border-radius: 10px 12px 8px 14px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Patrick Hand'; font-size: 18px;
  cursor: pointer; box-shadow: var(--shadow-sm);
}
.tool-rail .tool.on { background: var(--lego-yellow); }
.tool-rail .tool:hover { transform: translate(-1px,-1px); }
.tool-rail .tool-label {
  font-family: 'Kalam'; font-size: 11px; color: var(--ink-faded);
  margin-top: -4px; text-align: center;
}

/* Right inspector */
.inspector {
  background: var(--paper-2);
  border-left: 2px solid var(--ink);
  padding: 14px 14px;
  display: flex; flex-direction: column; gap: 14px;
}
.inspector h3 { font-size: 22px; }
.inspector .row { display: flex; justify-content: space-between; font-family: 'Kalam'; font-size: 14px; }
.inspector .row b { font-weight: 700; }

/* Viewport */
.viewport {
  position: relative; overflow: hidden;
  background: var(--paper);
  min-height: 480px;
}
.viewport .vp-controls {
  position: absolute; top: 12px; right: 12px;
  display: flex; gap: 6px; z-index: 4;
}
.viewport .vp-hud {
  position: absolute; top: 12px; left: 12px;
  font-family: 'Kalam'; font-size: 13px;
  color: var(--ink-faded); z-index: 4;
}

/* Bottom palette */
.palette {
  display: flex; flex-direction: column;
  border-top: 2px solid var(--ink);
  background: var(--paper-2);
}
.palette-tabs {
  display: flex; gap: 0; padding: 6px 10px 0;
  border-bottom: 2px solid var(--ink);
  background: var(--paper);
}
.palette-tabs .pt {
  font-family: 'Patrick Hand'; font-size: 16px;
  padding: 4px 14px 6px;
  border: 2px solid var(--ink); border-bottom: none;
  background: var(--paper-2); margin-right: 4px;
  border-radius: 8px 10px 0 0;
  cursor: pointer; margin-bottom: -2px;
}
.palette-tabs .pt.on { background: var(--paper); font-weight: 700; padding-top: 6px; }
.palette-bin {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(78px, 1fr));
  gap: 10px; padding: 14px;
  max-height: 180px; overflow: auto;
}
.palette-bin .item {
  border: 2px solid var(--ink);
  background: var(--paper);
  border-radius: 8px 10px 6px 12px;
  padding: 8px 6px 4px;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  cursor: pointer; box-shadow: var(--shadow-sm);
  position: relative;
}
.palette-bin .item:hover { transform: translate(-1px,-1px); }
.palette-bin .item .name { font-family: 'Kalam'; font-size: 11px; color: var(--ink-faded); }
.palette-bin .item .count {
  position: absolute; top: 2px; right: 4px;
  font-family: 'Kalam'; font-size: 11px; color: var(--ink-faded);
}

/* Color swatch */
.swatch-row { display: flex; gap: 6px; flex-wrap: wrap; }
.swatch {
  width: 22px; height: 22px; border: 2px solid var(--ink);
  border-radius: 50%; cursor: pointer; box-shadow: var(--shadow-sm);
  position: relative;
}
.swatch.on::after {
  content: ''; position: absolute; inset: -5px;
  border: 2px dashed var(--ink); border-radius: 50%;
}

/* Quadrant */
.quad-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
}
.quad-grid > .quad {
  position: relative; min-height: 240px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  overflow: hidden;
}
.quad-grid > .quad:nth-child(2n) { border-right: none; }
.quad-grid > .quad:nth-child(n+3) { border-bottom: none; }
.quad-tag {
  position: absolute; top: 8px; left: 8px;
  font-family: 'Caveat', cursive; font-size: 18px;
  background: var(--paper); padding: 2px 10px;
  border: 2px solid var(--ink); border-radius: 8px 12px 8px 10px;
  z-index: 5;
  box-shadow: var(--shadow-sm);
}

/* Card grid for set library */
.set-card {
  background: var(--paper);
  border: 2.5px solid var(--ink);
  border-radius: 12px 18px 10px 16px / 18px 10px 16px 12px;
  box-shadow: 4px 5px 0 rgba(31,29,26,0.85);
  overflow: hidden;
  display: flex; flex-direction: column;
  position: relative;
}
.set-card .thumb {
  height: 220px; position: relative; overflow: hidden;
  border-bottom: 2px solid var(--ink);
}
.set-card .body { padding: 14px 18px; flex: 1; display: flex; flex-direction: column; gap: 8px; }
.set-card h3 { font-size: 32px; line-height: 1; }
.set-card .stats { display: flex; gap: 14px; font-family: 'Kalam'; font-size: 14px; color: var(--ink-soft); }
.set-card .stats b { color: var(--ink); font-family: 'Patrick Hand'; font-size: 16px; }
.set-card .actions { display: flex; gap: 8px; margin-top: auto; padding-top: 8px; }
.set-card .ribbon {
  position: absolute; top: 14px; right: -8px;
  background: var(--lego-red); color: var(--lego-white);
  font-family: 'Caveat', cursive; font-size: 20px; font-weight: 700;
  padding: 4px 16px;
  transform: rotate(8deg);
  border: 2px solid var(--ink);
  z-index: 3;
}

/* Step list */
.step-list {
  display: flex; flex-direction: column; gap: 6px;
  font-family: 'Kalam'; font-size: 14px;
  max-height: 360px; overflow: auto;
  padding-right: 4px;
}
.step-list .step {
  display: flex; gap: 8px; align-items: center;
  padding: 4px 8px;
  border: 1.5px dashed transparent;
  border-radius: 6px;
}
.step-list .step.done { color: var(--ink-faded); text-decoration: line-through; }
.step-list .step.current { background: var(--lego-yellow); border-color: var(--ink); font-weight: 700; }
.step-list .step.upcoming { color: var(--ink-soft); }
.step-list .step .num {
  font-family: 'Patrick Hand'; font-size: 15px;
  width: 26px; text-align: right;
}

/* Progress bar */
.progress {
  height: 14px; border: 2px solid var(--ink);
  border-radius: 8px; background: var(--paper-2);
  overflow: hidden; position: relative;
}
.progress > i {
  display: block; height: 100%;
  background: var(--lego-yellow);
  border-right: 2px solid var(--ink);
}

/* Footnote */
.footnote {
  margin-top: 32px; padding: 16px 20px;
  border-top: 2px dashed var(--ink-light);
  font-family: 'Caveat', cursive; color: var(--ink-soft);
  font-size: 18px;
}

/* Scribble */
.scribble {
  display: inline-block; vertical-align: middle;
}

/* Specific minimaps */
.minimap {
  width: 100%; aspect-ratio: 4/3;
  background: var(--paper-2);
  border-radius: 8px; border: 1.5px solid var(--ink);
  position: relative; overflow: hidden;
}