/* ==========================================================================
   OreCalc — shared stylesheet
   Pixel / Minecraft-inspired dark UI. No framework — hand-authored CSS.
   ========================================================================== */

:root {
  --bg-obsidian: #090c0a;
  --bg-panel: #131a15;
  --bg-panel-alt: #0e1512;
  --bg-slot: #0a100c;

  --edge-light: rgba(255, 255, 255, 0.09);
  --edge-dark: rgba(0, 0, 0, 0.6);

  --text-primary: #e6efe8;
  --text-muted: #86998c;
  --text-faint: #4d5c52;

  --emerald: #46d67f;
  --emerald-glow: rgba(70, 214, 127, 0.35);

  --portal: #a578f2;
  --portal-glow: rgba(165, 120, 242, 0.35);

  --xp: #cdea55;
  --xp-glow: rgba(205, 234, 85, 0.32);

  --font-display: "Press Start 2P", "Courier New", monospace;
  --font-body: "VT323", "Courier New", monospace;

  --max-width: 780px;
}

* { box-sizing: border-box; }

html, body { background: var(--bg-obsidian); }

body {
  margin: 0;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 19px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  background-color: var(--bg-obsidian);
  background-image:
    linear-gradient(rgba(70, 214, 127, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(70, 214, 127, 0.025) 1px, transparent 1px);
  background-size: 22px 22px;
  min-height: 100vh;
}

::selection { background: var(--emerald-glow); color: #fff; }

:focus-visible { outline: 2px solid var(--emerald); outline-offset: 2px; }

h1, h2, h3, .font-display { font-family: var(--font-display); }

a { color: var(--emerald); }

p { margin: 0 0 14px; }

/* ---------- page shell ---------- */
.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 28px 16px 48px;
}

.site-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 24px;
}

.brand-link { display: flex; align-items: flex-start; gap: 12px; text-decoration: none; }

.brand-mark {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  width: 32px;
  height: 32px;
  padding: 3px;
  background: #000;
  flex-shrink: 0;
}
.brand-mark span { display: block; background: #1c241d; }
.brand-mark span:nth-child(3) { background: var(--emerald); }
.brand-mark span:nth-child(5) { background: var(--portal); }
.brand-mark span:nth-child(7) { background: var(--xp); }

.brand-name {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.5;
  margin: 0;
}
.tagline { color: var(--text-muted); font-size: 16px; margin: 4px 0 0; max-width: 420px; }

@media (min-width: 640px) {
  .brand-name { font-size: 19px; }
}

/* ---------- tool nav (hotbar) ---------- */
.toolnav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 24px;
  list-style: none;
  padding: 0;
}
.toolnav .slot {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 12px 6px;
  background: var(--bg-slot);
  border: 2px solid #000;
  box-shadow: inset 2px 2px 0 var(--edge-light), inset -2px -2px 0 var(--edge-dark);
  text-decoration: none;
  color: var(--text-muted);
  transition: filter 120ms ease;
}
.toolnav .slot:hover { filter: brightness(1.2); }
.toolnav .slot svg { width: 28px; height: 28px; }
.toolnav .slot span.label { font-family: var(--font-display); font-size: 10px; }
.toolnav .slot.current {
  color: var(--text-primary);
  box-shadow: inset -2px -2px 0 var(--edge-light), inset 2px 2px 0 var(--edge-dark);
}
.toolnav .slot.current::after {
  content: "";
  position: absolute;
  inset: -3px;
  border: 2px solid #f4f7f4;
  pointer-events: none;
}
.toolnav .slot.accent-portal.current::after { box-shadow: 0 0 14px var(--portal-glow); }
.toolnav .slot.accent-emerald.current::after { box-shadow: 0 0 14px var(--emerald-glow); }
.toolnav .slot.accent-xp.current::after { box-shadow: 0 0 14px var(--xp-glow); }

@media (min-width: 640px) {
  .toolnav .slot span.label { font-size: 11px; }
}

.back-link {
  display: inline-block;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 15px;
  margin-bottom: 16px;
}
.back-link:hover { color: var(--emerald); }

/* ---------- pixel bevel primitives ---------- */
.bevel-out {
  border: 2px solid #000;
  box-shadow: inset 2px 2px 0 var(--edge-light), inset -2px -2px 0 var(--edge-dark);
}
.bevel-in {
  border: 2px solid #000;
  box-shadow: inset -2px -2px 0 var(--edge-light), inset 2px 2px 0 var(--edge-dark);
}

.panel { background: var(--bg-panel); padding: 16px; }
@media (min-width: 640px) { .panel.main { padding: 24px; } }

/* ---------- form controls ---------- */
.field { display: block; margin-bottom: 16px; }
.field:last-child { margin-bottom: 0; }
.field-label {
  display: block;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.field-hint { display: block; font-size: 13px; color: var(--text-faint); margin-top: 4px; }

.slot-row {
  display: flex;
  align-items: stretch;
  background: var(--bg-slot);
}
.slot-row input[type="number"] {
  width: 100%;
  min-width: 0;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 22px;
  padding: 8px 12px;
  outline: none;
}
.slot-row input[type="number"]:focus-visible { outline: none; }
.slot-row:focus-within {
  box-shadow: inset -2px -2px 0 var(--edge-light), inset 2px 2px 0 var(--edge-dark), 0 0 0 2px var(--emerald);
}
.slot-suffix {
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-size: 15px;
  color: var(--text-faint);
  border-left: 2px solid #000;
  flex-shrink: 0;
  white-space: nowrap;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { opacity: 0.6; }

/* buttons */
.btn-pixel {
  background: var(--bg-panel-alt);
  color: var(--text-primary);
  font-family: var(--font-body);
  border: none;
  cursor: pointer;
  user-select: none;
  transition: filter 120ms ease, transform 80ms ease;
}
.btn-pixel:hover { filter: brightness(1.18); }
.btn-pixel:active { transform: translateY(1px); }
.btn-pixel:disabled { opacity: 0.35; cursor: not-allowed; filter: none; transform: none; }

.segmented { display: flex; background: #000; }
.segmented .btn-pixel {
  flex: 1;
  margin: 2px;
  padding: 10px 8px;
  font-size: 14px;
  font-family: var(--font-display);
  line-height: 1.6;
  color: var(--text-muted);
}
.segmented .btn-pixel .sub { display: block; font-size: 12px; margin-top: 4px; opacity: 0.8; }
.segmented .btn-pixel[aria-pressed="true"] {
  box-shadow: inset -2px -2px 0 var(--edge-light), inset 2px 2px 0 var(--edge-dark);
}

.stepper {
  display: flex;
  align-items: stretch;
  background: var(--bg-slot);
  border: 2px solid #000;
  box-shadow: inset -2px -2px 0 var(--edge-light), inset 2px 2px 0 var(--edge-dark);
}
.stepper button {
  padding: 0 16px;
  font-size: 22px;
  font-family: var(--font-display);
}
.stepper .value {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-family: var(--font-display);
  color: var(--emerald);
}

/* ---------- calculator layout ---------- */
.calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-items: start;
}
@media (min-width: 760px) {
  .calc-grid { grid-template-columns: 1fr auto 1fr; gap: 20px; }
}

.calc-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 4px 0;
  font-family: var(--font-display);
  font-size: 20px;
}
.calc-arrow .op { font-size: 12px; }
@media (min-width: 760px) {
  .calc-arrow { flex-direction: column; height: 100%; padding-top: 40px; }
}

.output-slot {
  background: radial-gradient(120% 140% at 50% -10%, rgba(70, 214, 127, 0.10), transparent 60%), var(--bg-slot);
}
.output-slot.accent-portal { background: radial-gradient(120% 140% at 50% -10%, rgba(165, 120, 242, 0.12), transparent 60%), var(--bg-slot); }
.output-slot.accent-xp { background: radial-gradient(120% 140% at 50% -10%, rgba(205, 234, 85, 0.12), transparent 60%), var(--bg-slot); }

.output-label {
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.output-main {
  display: flex;
  align-items: center;
  gap: 12px;
}
.output-main svg { width: 36px; height: 36px; flex-shrink: 0; }
.output-number {
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1;
  word-break: break-all;
}
.output-unit { color: var(--text-muted); font-size: 16px; }

.output-breakdown {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 2px solid #000;
  font-size: 15px;
}
.output-breakdown .row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-muted);
  padding: 2px 0;
}
.output-breakdown .row .val { color: var(--text-primary); }
.output-breakdown .row.save { border-top: 1px solid rgba(255,255,255,0.05); margin-top: 6px; padding-top: 8px; }
.output-breakdown .note { font-size: 13px; color: var(--text-faint); padding-top: 4px; }

.output-block { margin-bottom: 12px; }
.output-block:last-child { margin-bottom: 0; }
.output-sub-label { font-size: 13px; color: var(--text-faint); }

.section-intro { margin-bottom: 20px; }
.section-intro h1 { font-size: 16px; margin: 0 0 8px; }
.section-intro p { color: var(--text-muted); font-size: 16px; margin: 0; }
@media (min-width: 640px) { .section-intro h1 { font-size: 19px; } }

.text-portal { color: var(--portal); }
.text-emerald { color: var(--emerald); }
.text-xp { color: var(--xp); }
.text-primary { color: var(--text-primary); }
.text-muted { color: var(--text-muted); }
.text-faint { color: var(--text-faint); }

/* ---------- formula / details ---------- */
.formula {
  margin-top: 24px;
  background: var(--bg-panel-alt);
  border: 2px solid #000;
  box-shadow: inset -2px -2px 0 var(--edge-light), inset 2px 2px 0 var(--edge-dark);
  padding: 12px 16px;
}
.formula summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.formula summary::-webkit-details-marker { display: none; }
.formula summary .q { color: var(--emerald); }
.formula .body {
  margin-top: 12px;
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.55;
}
.formula .body strong { color: var(--text-primary); font-weight: normal; }

/* ---------- home page cards ---------- */
.intro { margin-bottom: 28px; }
.intro h1 { font-size: 18px; line-height: 1.5; margin: 0 0 12px; }
.intro p { color: var(--text-muted); font-size: 17px; max-width: 60ch; }
@media (min-width: 640px) { .intro h1 { font-size: 22px; } }

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 32px;
}
@media (min-width: 640px) {
  .card-grid { grid-template-columns: repeat(3, 1fr); }
}

.tool-card {
  display: block;
  background: var(--bg-panel);
  border: 2px solid #000;
  box-shadow: inset 2px 2px 0 var(--edge-light), inset -2px -2px 0 var(--edge-dark);
  padding: 18px;
  text-decoration: none;
  color: var(--text-primary);
  transition: filter 120ms ease, transform 80ms ease;
}
.tool-card:hover { filter: brightness(1.12); transform: translateY(-1px); }
.tool-card svg { width: 34px; height: 34px; margin-bottom: 10px; }
.tool-card h2 { font-family: var(--font-display); font-size: 14px; margin: 0 0 8px; }
.tool-card p { color: var(--text-muted); font-size: 16px; margin: 0; }

.about-block { margin-top: 8px; }
.about-block h2 { font-family: var(--font-display); font-size: 14px; margin: 28px 0 10px; }
.about-block p { color: var(--text-muted); font-size: 16px; }

/* ---------- legal pages ---------- */
.legal h1 { font-size: 18px; margin: 0 0 6px; }
.legal .updated { color: var(--text-faint); font-size: 14px; margin-bottom: 24px; }
.legal h2 { font-family: var(--font-display); font-size: 13px; margin: 28px 0 10px; color: var(--emerald); }
.legal p, .legal li { color: var(--text-muted); font-size: 16px; line-height: 1.6; }
.legal ul { padding-left: 22px; margin: 0 0 14px; }
.legal a { text-decoration: underline; }

/* ---------- footer ---------- */
.site-footer {
  text-align: center;
  color: var(--text-faint);
  font-size: 14px;
  line-height: 1.6;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 2px solid #000;
}
.site-footer .links { margin-top: 8px; }
.site-footer .links a {
  color: var(--text-muted);
  text-decoration: underline;
  margin: 0 8px;
}
.site-footer .links a:hover { color: var(--emerald); }

@media (prefers-reduced-motion: reduce) {
  .btn-pixel, .tool-card, .toolnav .slot { transition: none; }
}