/* ==========================================================================
   MESA/CYBER — design tokens
   Charcoal terminal surface, terminal-green signal accent, amber caution,
   crimson danger. Fraunces for display, IBM Plex Mono for data & labels,
   IBM Plex Sans for body copy.
   ========================================================================== */
:root{
  --bg:        #14181c;
  --bg-raised: #1b2026;
  --bg-inset:  #0f1215;
  --line:      #2a3138;
  --line-soft: #232a30;
  --fg:        #e8ecef;
  --fg-dim:    #9aa6ad;
  --fg-faint:  #5f6b72;
  --signal:    #00d47e;
  --signal-dim:#0a3d2c;
  --amber:     #ffb02e;
  --amber-dim: #3d2f0a;
  --danger:    #ff5c5c;
  --danger-dim:#3d1414;
  --wine:      #b23a48;

  --font-display: 'Fraunces', serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-sans: 'IBM Plex Sans', sans-serif;

  --radius: 6px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}

::selection{background:var(--signal-dim); color:var(--signal);}

a{color:var(--signal); text-decoration:none;}
a:hover{text-decoration:underline;}

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

.desk{
  max-width:1080px;
  margin:0 auto;
  padding:0 24px 80px;
}

/* ---------------- Hero / header ---------------- */
.hero{
  padding:56px 0 32px;
  border-bottom:1px solid var(--line-soft);
  margin-bottom:32px;
}
.hero-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-bottom:24px;
}
.brand{
  font-family:var(--font-display);
  font-size:28px;
  font-weight:600;
  letter-spacing:-0.01em;
  color:var(--fg);
  display:flex;
  align-items:baseline;
  gap:2px;
}
.brand .slash{color:var(--signal);}
.brand .sub{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--fg-faint);
  margin-left:12px;
  align-self:center;
}
.prompt-line{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--fg-faint);
}
.prompt-line .caret{
  display:inline-block;
  width:8px; height:14px;
  background:var(--signal);
  margin-left:4px;
  vertical-align:-2px;
  animation:blink 1.1s steps(1) infinite;
}
@keyframes blink{50%{opacity:0;}}

.lede{
  font-size:17px;
  color:var(--fg-dim);
  max-width:640px;
  margin:0;
}

/* ---------------- Tool grid (index) ---------------- */
.tool-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:1px;
  background:var(--line-soft);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  overflow:hidden;
  margin-bottom:40px;
}
.tool-card{
  background:var(--bg-raised);
  padding:22px 20px;
  display:flex;
  flex-direction:column;
  gap:10px;
  color:var(--fg);
  transition:background .15s ease;
  cursor:pointer;
  border:none;
  text-align:left;
  font-family:inherit;
}
.tool-card:hover, .tool-card.active{
  background:var(--bg-inset);
  text-decoration:none;
}
.tool-card.active{
  box-shadow:inset 2px 0 0 var(--signal);
}
.tool-card svg{width:20px; height:20px; stroke:var(--signal); flex-shrink:0;}
.tool-card h2{
  font-family:var(--font-mono);
  font-size:13.5px;
  font-weight:600;
  margin:0;
  letter-spacing:.01em;
}
.tool-card p{
  font-size:13px;
  color:var(--fg-dim);
  margin:0;
  line-height:1.45;
}
@media(max-width:820px){ .tool-grid{grid-template-columns:repeat(2,1fr);} }
@media(max-width:560px){ .tool-grid{grid-template-columns:1fr;} }

/* ---------------- Panels ---------------- */
.panel{
  display:none;
  background:var(--bg-raised);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  padding:32px;
  margin-bottom:24px;
}
.panel.active{display:block;}
.panel h2{
  font-family:var(--font-display);
  font-size:24px;
  font-weight:600;
  margin:0 0 6px;
}
.panel .desc{
  color:var(--fg-dim);
  font-size:14.5px;
  margin:0 0 24px;
}
.back-link{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12.5px;
  color:var(--fg-faint);
  margin-bottom:18px;
}
.back-link:hover{color:var(--signal);}

/* ---------------- Form elements ---------------- */
label{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--fg-faint);
  margin-bottom:8px;
}
input[type=text], input[type=password], input[type=number],
textarea, select{
  width:100%;
  background:var(--bg-inset);
  border:1px solid var(--line);
  border-radius:4px;
  color:var(--fg);
  font-family:var(--font-mono);
  font-size:14px;
  padding:11px 12px;
}
textarea{resize:vertical; min-height:110px;}
input:focus, textarea:focus, select:focus{border-color:var(--signal);}

.row{display:flex; gap:16px; flex-wrap:wrap; margin-bottom:18px;}
.row > div{flex:1; min-width:160px;}

.field{margin-bottom:18px;}

.check-row{
  display:flex; align-items:center; gap:8px;
  font-family:var(--font-mono); font-size:13px; color:var(--fg-dim);
  margin-bottom:10px;
}
.check-row input{width:auto;}

button, .btn{
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:600;
  letter-spacing:.02em;
  background:var(--signal);
  color:#08150f;
  border:none;
  border-radius:4px;
  padding:11px 18px;
  cursor:pointer;
  transition:filter .15s ease;
}
button:hover, .btn:hover{filter:brightness(1.1);}
button.secondary{
  background:transparent;
  color:var(--fg);
  border:1px solid var(--line);
}
button.secondary:hover{border-color:var(--signal); color:var(--signal); filter:none;}
button:disabled{opacity:.4; cursor:not-allowed;}

.btn-row{display:flex; gap:10px; flex-wrap:wrap; margin-top:4px;}

/* ---------------- Output blocks ---------------- */
.output{
  background:var(--bg-inset);
  border:1px solid var(--line);
  border-radius:4px;
  padding:14px 16px;
  font-family:var(--font-mono);
  font-size:13.5px;
  color:var(--fg);
  word-break:break-all;
  white-space:pre-wrap;
  margin-top:8px;
  position:relative;
}
.output.empty{color:var(--fg-faint);}
.copy-btn{
  position:absolute; top:8px; right:8px;
  font-size:11px; padding:5px 9px;
}

.kv{
  display:grid;
  grid-template-columns:160px 1fr;
  gap:6px 12px;
  font-family:var(--font-mono);
  font-size:13.5px;
}
.kv dt{color:var(--fg-faint);}
.kv dd{margin:0; color:var(--fg);}

/* ---------------- Meter / badges ---------------- */
.meter{
  height:8px;
  border-radius:4px;
  background:var(--bg-inset);
  overflow:hidden;
  margin:10px 0 6px;
  border:1px solid var(--line);
}
.meter-fill{height:100%; width:0%; transition:width .25s ease, background .25s ease;}
.badge{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.04em;
  text-transform:uppercase;
  padding:3px 9px;
  border-radius:3px;
}
.badge.ok{background:var(--signal-dim); color:var(--signal);}
.badge.warn{background:var(--amber-dim); color:var(--amber);}
.badge.bad{background:var(--danger-dim); color:var(--danger);}

.note{
  font-size:13px;
  color:var(--fg-faint);
  margin-top:10px;
  line-height:1.5;
}
.note.warn{color:var(--amber);}
.note.bad{color:var(--danger);}

hr.divider{
  border:none;
  border-top:1px dashed var(--line);
  margin:24px 0;
}

/* ---------------- Checklist tool ---------------- */
.check-cat{margin-bottom:22px;}
.check-cat h3{
  font-family:var(--font-mono);
  font-size:12.5px;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--fg-faint);
  margin:0 0 10px;
}
.check-item{
  display:flex; align-items:flex-start; gap:10px;
  padding:10px 0;
  border-bottom:1px solid var(--line-soft);
}
.check-item input{margin-top:3px; width:auto;}
.check-item label{
  font-family:var(--font-sans);
  font-size:14px;
  text-transform:none;
  letter-spacing:normal;
  color:var(--fg);
  margin:0;
  cursor:pointer;
}
.score-box{
  text-align:center;
  padding:24px;
  background:var(--bg-inset);
  border:1px solid var(--line);
  border-radius:6px;
  margin-top:20px;
}
.score-num{
  font-family:var(--font-display);
  font-size:48px;
  font-weight:600;
  color:var(--signal);
}
.score-num.warn{color:var(--amber);}
.score-num.bad{color:var(--danger);}

/* ---------------- Drop zone ---------------- */
.dropzone{
  border:1.5px dashed var(--line);
  border-radius:6px;
  padding:28px;
  text-align:center;
  color:var(--fg-faint);
  font-family:var(--font-mono);
  font-size:13px;
  cursor:pointer;
  transition:border-color .15s ease, color .15s ease;
}
.dropzone:hover, .dropzone.drag{border-color:var(--signal); color:var(--signal);}

/* ---------------- Footer / about ---------------- */
.about-acerkate{
  font-size:13.5px;
  color:var(--fg-faint);
  border-top:1px solid var(--line-soft);
  padding-top:24px;
  margin-top:8px;
}
footer.site-footer{
  text-align:center;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--fg-faint);
  padding:32px 0 0;
}