/* Optic — identidade de interface
   Tema único escuro (decisão de marca): canvas preto-azulado, superfícies em azul-noite,
   bordas em ciano translúcido, ação em ciano elétrico, grade milimétrica no fundo. */
:root{
  --bg:#0A0D14; --surface:#121824; --surface-2:#161F30; --surface-glass:rgba(18,24,36,.62);
  --line:rgba(0,163,255,.15); --line-strong:rgba(0,163,255,.35);
  --accent:#00A3FF; --accent-2:#5CD3FF; --accent-ink:#00131F;
  --text:#FFFFFF; --muted:#94A3B8; --faint:#5B6B82;
  --grid:rgba(255,255,255,.03); --grid-major:rgba(255,255,255,.055);
  --ok:#34D399; --warn:#FBBF24; --risk:#FB7185; --info:#A78BFA;
  --display:'Outfit', 'Segoe UI', system-ui, sans-serif;
  --body:'Manrope', 'Segoe UI', system-ui, sans-serif;
  --mono:'JetBrains Mono', ui-monospace, Consolas, monospace;
  color-scheme:dark;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--body);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--accent-2);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
h1,h2,h3,h4{font-family:var(--display);font-weight:600;letter-spacing:-.015em;text-wrap:balance;margin:0}
.wrap{max-width:1200px;margin:0 auto;padding-left:max(20px, env(safe-area-inset-left, 0px));padding-right:max(20px, env(safe-area-inset-right, 0px))}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.muted{color:var(--muted)}

/* Grade milimétrica: 8 px menor, 40 px maior */
.mm-grid{background-color:var(--bg);
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size:40px 40px,40px 40px,8px 8px,8px 8px}

/* Navegação */
.nav{position:sticky;top:0;z-index:20;background:rgba(10,13,20,.78);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-family:var(--display);font-weight:700;font-size:1.25rem;letter-spacing:.04em}
.brand:hover{text-decoration:none}
.brand svg{width:30px;height:30px}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{color:var(--muted);font-weight:500;font-size:.93rem}
.nav-links a:hover{color:var(--text);text-decoration:none}
.nav-links a.btn-primary,.nav-links a.btn-primary:hover{color:var(--accent-ink)}
@media (max-width:760px){.nav-links .hide-sm{display:none}}

/* Botões */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:11px 18px;font-weight:700;font-size:.93rem;border:1px solid transparent;cursor:pointer;font-family:var(--body);transition:transform .12s, box-shadow .2s, background .2s;white-space:nowrap}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--accent);color:var(--accent-ink);box-shadow:0 0 0 0 rgba(0,163,255,.0)}
.btn-primary:hover{box-shadow:0 0 24px rgba(0,163,255,.45);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line-strong)}
.btn-ghost:hover{background:rgba(0,163,255,.08)}
.btn-sm{padding:8px 14px;font-size:.86rem}

/* Superfícies */
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px}
.glass{background:var(--surface-glass);border:1px solid var(--line-strong);border-radius:18px;backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);box-shadow:0 30px 80px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.06)}
.eyebrow{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}

/* Campos */
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field label{font-size:.78rem;color:var(--muted);font-weight:600}
.input{width:100%;background:rgba(10,13,20,.7);border:1px solid var(--line-strong);border-radius:9px;color:var(--text);padding:9px 11px;font-family:var(--mono);font-size:.95rem;min-width:0}
.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(0,163,255,.18)}
.unit{position:relative}
.unit .input{padding-right:44px}
.unit span{position:absolute;right:10px;top:50%;transform:translateY(-50%);font-family:var(--mono);font-size:.75rem;color:var(--faint);pointer-events:none}

/* Tabelas */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:.88rem}
th{font-family:var(--mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:500;text-align:left;padding:10px 12px;background:var(--surface-2);border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:9px 12px;border-bottom:1px solid rgba(0,163,255,.07);vertical-align:top}
tr:last-child td{border-bottom:0}
td.num,th.num{text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums;white-space:nowrap}
code{font-family:var(--mono);font-size:.82em;background:rgba(0,163,255,.08);border:1px solid var(--line);padding:1px 6px;border-radius:5px;color:#CFE9FF;word-break:break-word}

/* Selos de confiança */
.badge{display:inline-flex;align-items:center;gap:5px;font-family:var(--mono);font-size:.66rem;letter-spacing:.06em;text-transform:uppercase;padding:2px 8px;border-radius:999px;border:1px solid currentColor;white-space:nowrap}
.badge::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.b-fabricante{color:var(--accent-2)} .b-norma{color:var(--info)} .b-sinapi{color:var(--ok)} .b-pratica{color:var(--warn)} .b-estimativa{color:var(--risk)}

@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}