/* ==========================================================================
   Logicroo · Mini Projects — shared design system
   Used by every page under /mini-projects/*
   Keep this file generic — no project-specific selectors (like .digit,
   .circuit-diagram) belong here if they're only used on one page; put those
   in a small <style> block inside that project's own index.php instead.
   ========================================================================== */

:root{
  --bg:#0F1A14;
  --bg-deep:#0A1310;
  --panel:#16241B;
  --panel-border:#263D2C;
  --line:#2E4536;
  --copper:#D98E4A;
  --copper-bright:#F2A863;
  --led:#FF5A45;
  --led-glow:rgba(255,90,69,.55);
  --seg-off:#241C19;
  --trace:#47654F;
  --trace-active:#7FE8B0;
  --text:#EDEBDD;
  --text-muted:#9CAB9D;
  --text-faint:#5C6E62;
  --radius:14px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}

body{
  margin:0;
  background:
    radial-gradient(1100px 520px at 82% -10%, rgba(217,142,74,.10), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(127,232,176,.06), transparent 55%),
    var(--bg);
  color:var(--text);
  font-family:'Inter', sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3{font-family:'Space Grotesk', sans-serif; margin:0; letter-spacing:-0.01em;}
.mono{font-family:'IBM Plex Mono', monospace;}
a{color:var(--copper-bright);}

.eyebrow{
  font-family:'IBM Plex Mono', monospace;
  font-size:.72rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--copper);
  display:flex;
  align-items:center;
  gap:.6em;
}
.eyebrow::before{content:""; width:18px; height:1px; background:var(--copper); display:inline-block;}

.wrap{max-width:1120px; margin:0 auto; padding:0 28px;}

/* ---------- top bar ---------- */
.topbar{border-bottom:1px solid var(--panel-border); padding:20px 0;}
.topbar .wrap{display:flex; align-items:center; justify-content:space-between;}
.brand{
  font-family:'IBM Plex Mono', monospace;
  font-size:.86rem; letter-spacing:.08em;
  display:flex; align-items:center; gap:.55em; color:var(--text);
  text-decoration:none;
}
.brand .dot{
  width:9px; height:9px; border-radius:50%;
  background:var(--copper); box-shadow:0 0 0 3px rgba(217,142,74,.18);
}
.topbar .source{
  font-family:'IBM Plex Mono', monospace; font-size:.72rem; color:var(--text-faint);
  text-decoration:none; border:1px solid var(--panel-border);
  padding:6px 12px; border-radius:999px; transition:border-color .2s, color .2s;
}
.topbar .source:hover{border-color:var(--copper); color:var(--copper-bright);}

/* ---------- hero ---------- */
.hero{padding:64px 0 40px;}
.hero-grid{display:grid; grid-template-columns:1fr 1.05fr; gap:56px; align-items:center;}
.hero h1{font-size:clamp(2.1rem, 3.6vw, 3rem); line-height:1.06; margin:16px 0 18px;}
.hero h1 span{color:var(--copper-bright);}
.hero p.lead{color:var(--text-muted); font-size:1.05rem; max-width:46ch;}

.stat-row{display:flex; gap:28px; margin-top:30px; flex-wrap:wrap;}
.stat{font-family:'IBM Plex Mono', monospace;}
.stat .n{font-size:1.5rem; color:var(--text); display:block; font-weight:600;}
.stat .l{font-size:.7rem; letter-spacing:.1em; text-transform:uppercase; color:var(--text-faint);}

.cta-hint{
  margin-top:34px; font-family:'IBM Plex Mono', monospace; font-size:.78rem;
  color:var(--text-faint); display:flex; align-items:center; gap:8px;
}
.cta-hint svg{flex-shrink:0;}

/* ---------- scope panel ---------- */
.scope{
  background:var(--panel); border:1px solid var(--panel-border); border-radius:var(--radius);
  padding:22px 22px 26px; box-shadow:0 30px 60px -30px rgba(0,0,0,.6);
}
.scope-head{
  display:flex; justify-content:space-between; align-items:center;
  font-family:'IBM Plex Mono', monospace; font-size:.68rem; color:var(--text-faint);
  letter-spacing:.08em; text-transform:uppercase; margin-bottom:18px; padding:0 2px;
}
.scope-head .live{display:flex; align-items:center; gap:6px;}
.scope-head .live i{
  width:7px; height:7px; border-radius:50%; background:var(--trace); display:inline-block;
  transition:background .2s, box-shadow .2s;
}
.display-panel.live .scope-head .live i{background:var(--trace-active); box-shadow:0 0 8px var(--trace-active);}

.view-toggle-btn{
  padding:7px 14px;
  background:var(--bg-deep); border:1px solid var(--panel-border); border-radius:999px;
  color:var(--text-muted); font-family:'IBM Plex Mono', monospace; font-size:.68rem;
  letter-spacing:.05em; cursor:pointer; user-select:none; white-space:nowrap;
  transition:border-color .15s, color .15s, background .15s;
}
.view-toggle-btn:hover{border-color:var(--copper); color:var(--copper-bright);}
.view-toggle-btn.circuit-active{background:rgba(217,142,74,.14); border-color:var(--copper); color:var(--copper-bright);}

.view-pane{display:none;}
.view-pane.active{display:block;}

.readout{
  display:flex; justify-content:center; gap:26px; margin-bottom:22px;
  font-family:'IBM Plex Mono', monospace; font-size:.72rem; color:var(--text-faint);
  letter-spacing:.06em; text-transform:uppercase;
}
.readout b{display:block; font-size:1rem; color:var(--text); text-transform:none; letter-spacing:0; margin-top:3px;}

.bit-row{display:flex; justify-content:center; gap:12px; margin-bottom:18px;}
.bit-btn{
  width:56px; padding:10px 0 8px;
  background:var(--bg-deep); border:1px solid var(--panel-border); border-radius:10px;
  color:var(--text-muted); font-family:'IBM Plex Mono', monospace; font-size:.78rem;
  text-align:center; cursor:pointer; user-select:none;
  transition:border-color .15s, color .15s, background .15s;
}
.bit-btn .val{display:block; font-size:1.1rem; font-weight:600; margin-top:4px; color:var(--text);}
.bit-btn:hover{border-color:var(--copper);}
.bit-btn.set{background:rgba(127,232,176,.08); border-color:var(--trace-active); color:var(--trace-active);}
.bit-btn.set .val{color:var(--trace-active);}

.ctrl-row{display:flex; justify-content:center; gap:10px; flex-wrap:wrap;}
.ctrl-btn{
  padding:9px 16px;
  background:var(--bg-deep); border:1px solid var(--panel-border); border-radius:999px;
  color:var(--text-muted); font-family:'IBM Plex Mono', monospace; font-size:.72rem;
  letter-spacing:.05em; cursor:pointer; user-select:none;
  transition:border-color .15s, color .15s, background .15s;
}
.ctrl-btn:hover{border-color:var(--copper); color:var(--copper-bright);}
.ctrl-btn.active{background:rgba(255,90,69,.12); border-color:var(--led); color:#ffb3a8;}
.ctrl-btn.toggle-on{background:rgba(217,142,74,.14); border-color:var(--copper); color:var(--copper-bright);}

.press-hint{
  text-align:center; font-family:'IBM Plex Mono', monospace; font-size:.72rem;
  color:var(--text-faint); margin-top:16px; letter-spacing:.03em;
}
.press-hint strong{color:var(--copper-bright); font-weight:600;}

/* ---------- generic section ---------- */
section{padding:56px 0;}
section > .wrap > .eyebrow{margin-bottom:14px;}
section h2{font-size:clamp(1.5rem, 2.4vw, 2rem); margin-bottom:8px;}
section p.section-sub{color:var(--text-muted); max-width:60ch; margin:0 0 34px;}
.divider{border:none; border-top:1px solid var(--panel-border); margin:0;}

/* ---------- components table ---------- */
.parts{border:1px solid var(--panel-border); border-radius:var(--radius); overflow:hidden;}
.part-row{
  display:grid; grid-template-columns:70px 1fr 110px; align-items:center;
  padding:15px 22px; border-bottom:1px solid var(--panel-border); background:var(--panel);
}
.part-row:last-child{border-bottom:none;}
.part-row:nth-child(even){background:#141F18;}
.part-qty{font-family:'IBM Plex Mono', monospace; color:var(--copper-bright); font-size:.85rem;}
.part-name{font-size:.98rem;}
.part-tag{
  justify-self:end; font-family:'IBM Plex Mono', monospace; font-size:.68rem; color:var(--text-faint);
  border:1px solid var(--panel-border); padding:3px 9px; border-radius:999px; letter-spacing:.06em;
}

/* ---------- pinout table ---------- */
.pinout{border:1px solid var(--panel-border); border-radius:var(--radius); overflow:hidden;}
.pin-row{
  display:grid; grid-template-columns:100px 120px 90px 1fr;
  padding:14px 22px; border-bottom:1px solid var(--panel-border); background:var(--panel);
  align-items:center; gap:10px;
}
.pin-row.head{
  background:var(--bg-deep); font-family:'IBM Plex Mono', monospace; font-size:.66rem;
  text-transform:uppercase; letter-spacing:.1em; color:var(--text-faint);
}
.pin-row:not(.head):nth-child(even){background:#141F18;}
.pin-row:last-child{border-bottom:none;}
.pin-name{font-family:'IBM Plex Mono', monospace; color:var(--copper-bright); font-weight:600; font-size:.88rem;}
.pin-no{font-family:'IBM Plex Mono', monospace; color:var(--text-muted); font-size:.82rem;}
.pin-dir{font-family:'IBM Plex Mono', monospace; font-size:.7rem; color:var(--text-faint);}
.pin-desc{color:var(--text-muted); font-size:.9rem;}

/* ---------- generic schematic/diagram styling (shared token set) ---------- */
svg.schematic{width:100%; height:auto; display:block;}

.circuit-diagram .wire{fill:none; stroke:var(--trace); stroke-width:2.5; stroke-linecap:round; stroke-linejoin:round;}
.circuit-diagram .zigzag{fill:none; stroke:var(--text-muted); stroke-width:2.5; stroke-linecap:round; stroke-linejoin:round;}
.circuit-diagram .rail{stroke:var(--text-muted); stroke-width:2.5;}
.circuit-diagram .node-dot{fill:var(--text-muted);}
.circuit-diagram .ic-body{fill:var(--bg-deep); stroke:var(--text-muted); stroke-width:2.5;}
.circuit-diagram .sw-lever{stroke:var(--text-muted); stroke-width:2.5; stroke-linecap:round;}
.circuit-diagram .sw-dot{fill:var(--text-muted);}
.circuit-diagram .pin-marker{fill:var(--bg-deep); stroke:var(--text-muted); stroke-width:2.5;}
.circuit-diagram .seg{fill:var(--seg-off); stroke:var(--bg-deep); stroke-width:1;}
.circuit-diagram .lbl{font-family:'IBM Plex Mono', monospace; fill:var(--text-muted); font-size:12px;}
.circuit-diagram .lbl-strong{font-family:'IBM Plex Mono', monospace; fill:var(--text); font-size:12.5px; font-weight:600;}
.circuit-diagram .lbl-dim{font-family:'IBM Plex Mono', monospace; fill:var(--text-faint); font-size:10.5px;}

.circuit-diagram .flow-dot{opacity:0;}
.circuit-diagram .flow-dot.run{opacity:1; animation-play-state:running;}

.circuit-diagram .flow.wire{stroke:var(--trace-active);}
.circuit-diagram .flow.sw-lever{stroke:var(--trace-active);}
.circuit-diagram .flow.sw-dot{fill:var(--trace-active);}
.circuit-diagram .flow.node-dot{fill:var(--trace-active);}
.circuit-diagram .ic-body.flow{stroke:var(--copper-bright); filter:drop-shadow(0 0 6px rgba(217,142,74,.45));}
.circuit-diagram .pin-marker.flow{stroke:var(--copper-bright); fill:rgba(217,142,74,.25);}
.circuit-diagram .seg.flow{fill:var(--led); filter:drop-shadow(0 0 6px var(--led-glow));}
.circuit-diagram .lbl-strong.flow{fill:var(--copper-bright);}

.circuit-diagram .wire, .circuit-diagram .sw-lever, .circuit-diagram .sw-dot, .circuit-diagram .node-dot,
.circuit-diagram .ic-body, .circuit-diagram .pin-marker, .circuit-diagram .seg, .circuit-diagram .lbl-strong{
  transition:stroke .2s, fill .2s, filter .2s;
}

.circuit-readout{
  display:flex; justify-content:center; gap:26px; margin:4px 0 4px;
  font-family:'IBM Plex Mono', monospace; font-size:.72rem; color:var(--text-faint);
  letter-spacing:.06em; text-transform:uppercase;
}
.circuit-readout b{display:block; font-size:1rem; color:var(--text); text-transform:none; letter-spacing:0; margin-top:3px;}

.walkthrough{
  display:grid; grid-template-columns:repeat(4, 1fr); gap:12px; margin-top:20px;
}
.walk-step{
  background:var(--bg-deep); border:1px solid var(--panel-border); border-radius:10px;
  padding:12px 14px;
}
.walk-step .num{
  font-family:'IBM Plex Mono', monospace; font-size:.68rem; color:var(--text-faint); letter-spacing:.08em;
}
.walk-step p{margin:6px 0 0; font-size:.82rem; color:var(--text-muted); line-height:1.45;}

/* ---------- how it works ---------- */
.how-grid{display:grid; grid-template-columns:1fr 1fr; gap:44px; align-items:start;}
.how-grid p{color:var(--text-muted); margin:0 0 16px;}
.how-grid p strong{color:var(--text); font-weight:500;}
.fact-card{background:var(--panel); border:1px solid var(--panel-border); border-radius:var(--radius); padding:22px 24px;}
.fact-card .mono-label{
  font-family:'IBM Plex Mono', monospace; font-size:.68rem; letter-spacing:.1em; text-transform:uppercase;
  color:var(--copper); margin-bottom:10px; display:block;
}
.fact-card p{margin:0 0 12px; font-size:.94rem;}
.fact-card p:last-child{margin-bottom:0;}

/* ---------- steps ---------- */
.steps{counter-reset:step;}
.step{
  display:grid; grid-template-columns:64px 1fr; gap:22px; padding:26px 0;
  border-bottom:1px solid var(--panel-border);
}
.step:first-child{padding-top:0;}
.step:last-child{border-bottom:none; padding-bottom:0;}
.step-num{
  counter-increment:step; font-family:'IBM Plex Mono', monospace; font-size:.85rem;
  color:var(--copper-bright); display:flex; align-items:flex-start; padding-top:2px;
}
.step-num::before{content:counter(step, decimal-leading-zero);}
.step h3{font-size:1.06rem; margin-bottom:6px;}
.step p{color:var(--text-muted); margin:0; max-width:64ch;}

/* ---------- troubleshooting ---------- */
.trouble{
  background:var(--panel); border:1px solid var(--panel-border); border-left:3px solid var(--led);
  border-radius:var(--radius); padding:8px 26px;
}
.trouble li{padding:16px 0; border-bottom:1px solid var(--panel-border); color:var(--text-muted); list-style:none;}
.trouble li:last-child{border-bottom:none;}
.trouble li::before{content:"—"; color:var(--led); margin-right:10px;}

footer{border-top:1px solid var(--panel-border); padding:30px 0; font-family:'IBM Plex Mono', monospace; font-size:.74rem; color:var(--text-faint);}
footer .wrap{display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;}
footer a{color:var(--text-faint); text-decoration:none; border-bottom:1px dotted var(--text-faint);}
footer a:hover{color:var(--copper-bright); border-color:var(--copper-bright);}

.reveal{opacity:1; transform:translateY(14px); transition:opacity .6s ease, transform .6s ease;}
.reveal.in{opacity:1; transform:none;}

/* ---------- mini-projects index / listing grid (used by /mini-projects/) ---------- */
.project-grid{display:grid; grid-template-columns:repeat(auto-fill, minmax(260px, 1fr)); gap:18px; margin-top:10px;}
.project-card{
  display:block; background:var(--panel); border:1px solid var(--panel-border); border-radius:var(--radius);
  padding:20px 22px; text-decoration:none; transition:border-color .2s, transform .2s;
}
.project-card:hover{border-color:var(--copper); transform:translateY(-2px);}
.project-card h3{color:var(--text); font-size:1.02rem; margin-bottom:8px;}
.project-card p{color:var(--text-muted); font-size:.88rem; margin:0;}

@media (max-width: 860px){
  .hero-grid{grid-template-columns:1fr;}
  .how-grid{grid-template-columns:1fr;}
  .part-row{grid-template-columns:50px 1fr auto;}
  .pin-row{grid-template-columns:80px 1fr; row-gap:4px;}
  .pin-dir{order:3;}
  .pin-desc{order:4; grid-column:1 / -1;}
  .walkthrough{grid-template-columns:1fr 1fr;}
  .scope-head{flex-direction: column;}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .reveal{transition:none; opacity:1; transform:none;}
}