/* ==========================================================================
   Minecraft Tools — shared design system
   mattlivingston.com/minecraft/
   ========================================================================== */

:root {
  /* base */
  --bg: #10130d;
  --bg-soft: #151911;
  --bg-grid: rgba(255, 255, 255, 0.025);
  --panel: rgba(31, 36, 24, 0.92);
  --panel-strong: #242b1d;
  --panel-border: #434b34;
  --text: #f1ecdd;
  --text-dim: #b7b19c;
  --text-faint: #807a67;

  /* per-tool accents (overridden per body[data-tool]) */
  --accent: #6fae3a;
  --accent-dim: #3f5f28;

  /* fixed accents */
  --grass: #6fae3a;
  --stone: #9a978c;
  --portal: #b24bf3;
  --redstone: #c1440e;
  --emerald: #3ec98a;
  --gold: #d4af37;
  --lapis: #4c7bd9;
  --amethyst: #c17cff;
  --copper: #d1844a;
  --water: #55c7d9;

  --radius: 6px;
  --border-w: 2px;
  --nav-h: 52px;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.32);
  --shadow-soft: 0 10px 24px rgba(0, 0, 0, 0.22);
}

body[data-tool="challenge"] { --accent: var(--grass); --accent-dim: #3f5f28; }
body[data-tool="blocks"]    { --accent: var(--stone); --accent-dim: #5c5a52; }
body[data-tool="portal"]    { --accent: var(--portal); --accent-dim: #5c2a80; }
body[data-tool="villagers"] { --accent: var(--emerald); --accent-dim: #1f6b4a; }
body[data-tool="enchant"]   { --accent: var(--gold); --accent-dim: #7a6320; }
body[data-tool="farm"]      { --accent: var(--redstone); --accent-dim: #6b2408; }
body[data-tool="potion"]    { --accent: var(--amethyst); --accent-dim: #65408c; }
body[data-tool="highway"]   { --accent: var(--portal); --accent-dim: #5c2a80; }
body[data-tool="coords"]    { --accent: var(--lapis); --accent-dim: #263f75; }
body[data-tool="palette"]   { --accent: var(--copper); --accent-dim: #704326; }
body[data-tool="controls"]  { --accent: var(--water); --accent-dim: #2b6873; }

* { box-sizing: border-box; }

a { color: inherit; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  background-image:
    radial-gradient(circle at 20% 0%, rgba(212, 175, 55, 0.07), transparent 28rem),
    linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 40px 40px;
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  min-height: 100vh;
}

::selection {
  color: #101208;
  background: var(--accent);
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(16, 19, 13, 0.88);
  border-bottom: 1px solid var(--panel-border);
  backdrop-filter: blur(10px);
}

.site-nav-inner {
  position: relative;
  max-width: 980px;
  min-height: var(--nav-h);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.site-brand {
  flex: 0 0 auto;
  font-family: 'Big Shoulders Display', sans-serif;
  font-size: 20px;
  line-height: 1;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text);
}

.site-brand:hover,
.site-brand:focus-visible {
  color: var(--accent);
  outline: none;
}

.site-links {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
}

.site-links::-webkit-scrollbar { display: none; }

.site-links a {
  flex: 0 0 auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0;
  line-height: 1;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text-dim);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 9px 10px;
  transition: color 0.16s ease, background 0.16s ease, border-color 0.16s ease;
}

.site-links a:hover,
.site-links a:focus-visible {
  color: var(--text);
  background: rgba(255, 255, 255, 0.035);
  border-color: var(--panel-border);
  outline: none;
}

.site-links a[aria-current="page"] {
  color: #101208;
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
}

.mobile-tools-menu { display: none; }

.mobile-tools-menu summary {
  list-style: none;
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0;
  line-height: 1;
  text-transform: uppercase;
  color: #101208;
  background: var(--accent);
  border: var(--border-w) solid var(--accent);
  border-radius: var(--radius);
  padding: 0 14px;
  cursor: pointer;
}

.mobile-tools-menu summary::-webkit-details-marker { display: none; }
.mobile-tools-menu summary::after { content: '+'; font-weight: 700; }
.mobile-tools-menu[open] summary::after { content: '-'; }

.mobile-menu-panel {
  position: absolute;
  top: calc(var(--nav-h) - 1px);
  right: 12px;
  width: min(330px, calc(100vw - 24px));
  max-height: calc(100vh - var(--nav-h) - 18px);
  overflow: auto;
  background: var(--panel);
  border: var(--border-w) solid var(--panel-border);
  border-radius: var(--radius);
  padding: 8px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  box-shadow: var(--shadow);
}

.mobile-menu-panel a {
  min-height: 44px;
  display: flex;
  align-items: center;
  color: var(--text-dim);
  background: var(--bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0;
  line-height: 1.2;
  text-transform: uppercase;
  text-decoration: none;
  padding: 9px 10px;
}

.mobile-menu-panel a:hover,
.mobile-menu-panel a:focus-visible {
  color: var(--text);
  border-color: var(--accent);
  outline: none;
}

body[data-tool="hub"] .mobile-menu-panel a[data-tool="hub"],
body[data-tool="challenge"] .mobile-menu-panel a[data-tool="challenge"],
body[data-tool="blocks"] .mobile-menu-panel a[data-tool="blocks"],
body[data-tool="palette"] .mobile-menu-panel a[data-tool="palette"],
body[data-tool="enchant"] .mobile-menu-panel a[data-tool="enchant"],
body[data-tool="potion"] .mobile-menu-panel a[data-tool="potion"],
body[data-tool="highway"] .mobile-menu-panel a[data-tool="highway"],
body[data-tool="coords"] .mobile-menu-panel a[data-tool="coords"],
body[data-tool="villagers"] .mobile-menu-panel a[data-tool="villagers"],
body[data-tool="farm"] .mobile-menu-panel a[data-tool="farm"],
body[data-tool="controls"] .mobile-menu-panel a[data-tool="controls"] {
  color: #101208;
  background: var(--accent);
  border-color: var(--accent);
}

.shell {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 20px 80px;
}

.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 10px;
}

h1 {
  font-family: 'Big Shoulders Display', sans-serif;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
  font-size: 48px;
  line-height: 0.95;
  margin: 0 0 12px;
  color: var(--text);
}

.subtitle {
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.5;
  max-width: 52ch;
  margin: 0 0 32px;
}

.section-label,
.openings-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 22px 0 10px;
}

/* crafting-grid divider — shared signature motif */
.grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin: 0 0 32px;
}
.grid3 .cell {
  aspect-ratio: 1;
  border: var(--border-w) solid var(--panel-border);
  background: var(--panel);
  border-radius: var(--radius);
}
.grid3.divider .cell { aspect-ratio: auto; height: 6px; border: none; background: var(--panel-border); border-radius: 999px; }
.grid3.divider .cell:nth-child(odd) { background: var(--accent-dim); }

.card {
  background: var(--panel);
  border: var(--border-w) solid var(--panel-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-soft);
}

.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 8px;
}

select, input[type="number"], input[type="text"] {
  width: 100%;
  background: rgba(9, 11, 8, 0.72);
  border: var(--border-w) solid var(--panel-border);
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 15px;
  padding: 10px 12px;
  border-radius: var(--radius);
  outline: none;
  min-height: 44px;
  transition: border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}
select:focus, input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 24%, transparent);
  background: rgba(9, 11, 8, 0.92);
}

.row { display: flex; gap: 14px; }
.row .field { flex: 1; }

.btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  letter-spacing: 0;
  text-transform: uppercase;
  background: var(--accent);
  color: #101208;
  border: var(--border-w) solid var(--accent);
  padding: 12px 20px;
  cursor: pointer;
  border-radius: var(--radius);
  font-weight: 700;
  min-height: 44px;
  transition: filter 0.16s ease, transform 0.16s ease, border-color 0.16s ease, color 0.16s ease, background 0.16s ease;
}
.btn:hover { filter: brightness(1.12); transform: translateY(-1px); }
.btn:focus-visible { outline: 2px solid var(--text); outline-offset: 2px; }

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border-color: var(--panel-border);
  font-weight: 400;
}
.btn-ghost:hover { color: var(--text); border-color: var(--accent); filter: none; }

.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }

.output-slot {
  border: var(--border-w) solid var(--panel-border);
  background: rgba(9, 11, 8, 0.72);
  border-radius: var(--radius);
  padding: 16px;
  position: relative;
  min-width: 0;
}
.output-slot .n {
  font-family: 'JetBrains Mono', monospace;
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.output-slot .label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: 6px;
}

.slots-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 20px;
}

footer.tool-footer {
  margin-top: 44px;
  background: var(--panel);
  border: var(--border-w) solid var(--panel-border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 18px 20px;
  color: var(--text-dim);
  box-shadow: var(--shadow-soft);
}

.footer-title {
  font-family: 'Big Shoulders Display', sans-serif;
  font-size: 22px;
  line-height: 1;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 10px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0;
  line-height: 1.4;
  text-transform: uppercase;
}

.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent);
  outline: none;
}

.footer-note {
  margin-top: 12px;
  color: var(--text-faint);
  font-size: 12px;
  line-height: 1.45;
}

.footer-credit {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--panel-border);
  color: var(--text-faint);
  font-size: 11px;
  line-height: 1.4;
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

@media (max-width: 760px) {
  .site-nav-inner { padding: 0 12px; gap: 10px; justify-content: space-between; }
  .site-brand { font-size: 18px; }
  .site-links { display: none; }
  .mobile-tools-menu { display: block; margin-left: auto; }
}

@media (max-width: 560px) {
  html, body { background-size: 32px 32px; }
  .shell { padding: 34px 14px 64px; }
  h1 { font-size: 40px; }
  .subtitle { font-size: 14px; margin-bottom: 24px; }
  .grid3 { margin-bottom: 24px; }
  .card { padding: 18px; }
  .row { flex-direction: column; }
  .row .field { width: 100%; }
  .field { margin-bottom: 14px; }
  .btn-row, .toolbar, .coord-actions { gap: 8px; }
  .btn-row .btn, .toolbar .btn, .coord-actions .btn { width: 100%; }
  .slots-row { grid-template-columns: 1fr; }
  footer.tool-footer { padding: 16px; }
  .footer-links { display: grid; grid-template-columns: 1fr; gap: 8px; }
}

@media (max-width: 380px) {
  .mobile-menu-panel { grid-template-columns: 1fr; }
}