/* Santos Soluções — Engenharia e Inteligência em Energia */
:root {
  --paper: #f5f7f6;
  --surface: #ffffff;
  --ink: #0b2233;
  --ink-2: #3c5061;
  --muted: #667a88;
  --line: #d6e0dc;
  --green: #2f8f3a;
  --green-soft: #e3f1e4;
  --blue: #0a6aad;
  --band: #0b2233;
  --band-ink: #eef4f1;
  --band-muted: #9fb4c2;
  --focus: #0a6aad;
  --display: "Poppins", "Segoe UI", system-ui, sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper: #0d1820;
    --surface: #13222c;
    --ink: #e7eef2;
    --ink-2: #bccad3;
    --muted: #8ea2b0;
    --line: #243844;
    --green: #6cc476;
    --green-soft: #173024;
    --blue: #6db3e6;
    --band: #07121a;
    --band-ink: #e7eef2;
    --band-muted: #8ea2b0;
    --focus: #6db3e6;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #0d1820;
  --surface: #13222c;
  --ink: #e7eef2;
  --ink-2: #bccad3;
  --muted: #8ea2b0;
  --line: #243844;
  --green: #6cc476;
  --green-soft: #173024;
  --blue: #6db3e6;
  --band: #07121a;
  --band-ink: #e7eef2;
  --band-muted: #8ea2b0;
  --focus: #6db3e6;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.65 var(--body);
}
img { max-width: 100%; }
a { color: var(--blue); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--display); line-height: 1.2; text-wrap: balance; margin: 0; }
p { margin: 0; }

.wrap { max-width: 1080px; margin: 0 auto; padding-inline: 20px; }
.eyebrow {
  font: 500 12px/1.4 var(--mono);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--green);
}

/* Header */
.site-header { border-bottom: 1px solid var(--line); background: var(--paper); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 16px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand strong { font: 600 19px/1 var(--display); letter-spacing: -.01em; }
.brand span { font: 500 11px/1 var(--mono); letter-spacing: .14em; color: var(--green); text-transform: uppercase; }
.nav { display: flex; gap: 20px; flex-wrap: wrap; }
.nav a { color: var(--ink-2); text-decoration: none; font-size: 15px; }
.nav a:hover { color: var(--ink); text-decoration: underline; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 6px; font: 500 15px/1 var(--body); text-decoration: none; border: 1px solid transparent; }
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: var(--surface); }
.btn-ghost:hover { border-color: var(--ink-2); }
:root[data-theme="dark"] .btn-primary { color: #07121a; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn-primary { color: #07121a; } }

/* Hero */
.hero { padding-block: 64px 56px; }
.hero .wrap { display: grid; grid-template-columns: 1.25fr 1fr; gap: 48px; align-items: start; }
.hero h1 { font-size: clamp(32px, 4.6vw, 50px); font-weight: 600; letter-spacing: -.02em; margin-top: 14px; }
.hero h1 em { font-style: normal; color: var(--green); }
.hero .lede { margin-top: 20px; font-size: 19px; color: var(--ink-2); max-width: 36ch; }
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }

.ledger { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.ledger-head { display: flex; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--line); font: 500 12px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.ledger ul { list-style: none; margin: 0; padding: 0; }
.ledger li { display: grid; grid-template-columns: 11.5ch 1fr; gap: 14px; padding: 13px 18px; border-bottom: 1px dashed var(--line); font-size: 15px; }
.ledger li:last-child { border-bottom: 0; }
.ledger code { font: 500 13px/1.5 var(--mono); color: var(--green); }
.ledger span { color: var(--ink-2); }

/* Credentials band */
.band { background: var(--band); color: var(--band-ink); }
.band .wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.fact { padding: 28px 20px 28px 0; border-right: 1px solid rgba(159,180,194,.25); padding-left: 20px; }
.fact:first-child { padding-left: 0; }
.fact:last-child { border-right: 0; }
.fact b { display: block; font: 600 28px/1.1 var(--display); letter-spacing: -.01em; font-variant-numeric: tabular-nums; }
.fact small { display: block; margin-top: 8px; font-size: 14px; line-height: 1.45; color: var(--band-muted); }

/* Sections */
section.block { padding-block: 72px; }
section.block + section.block { border-top: 1px solid var(--line); }
.section-head { max-width: 62ch; margin-bottom: 36px; }
.section-head h2 { font-size: clamp(26px, 3vw, 34px); font-weight: 600; letter-spacing: -.015em; margin-top: 10px; }
.section-head p { margin-top: 12px; color: var(--ink-2); }

.services { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.service { background: var(--surface); padding: 28px; display: flex; flex-direction: column; gap: 10px; }
.service code { font: 500 12px/1.4 var(--mono); color: var(--muted); letter-spacing: .02em; }
.service h3 { font-size: 20px; font-weight: 600; }
.service p { color: var(--ink-2); font-size: 16px; }
.service .deliv { margin-top: auto; padding-top: 10px; font-size: 14px; color: var(--muted); }
.service .deliv strong { color: var(--ink-2); font-weight: 500; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; counter-reset: step; }
.step { border-top: 2px solid var(--green); padding-top: 18px; }
.step::before { counter-increment: step; content: "0" counter(step); font: 500 13px/1 var(--mono); color: var(--green); }
.step h3 { font-size: 18px; font-weight: 600; margin-top: 10px; }
.step p { margin-top: 8px; color: var(--ink-2); font-size: 16px; }
.note { margin-top: 32px; padding: 16px 18px; background: var(--green-soft); border-radius: 6px; font-size: 15px; color: var(--ink-2); max-width: 70ch; }

.about { display: grid; grid-template-columns: 1fr 1.4fr; gap: 48px; align-items: start; }
.about h2 { font-size: clamp(26px, 3vw, 34px); font-weight: 600; margin-top: 10px; }
.about .role { margin-top: 10px; color: var(--muted); font-size: 15px; }
.about .text { display: flex; flex-direction: column; gap: 16px; color: var(--ink-2); max-width: 64ch; }
.about ul { margin: 0; padding-left: 18px; display: flex; flex-direction: column; gap: 6px; }

.articles { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.articles li { border-bottom: 1px solid var(--line); }
.articles a { display: grid; grid-template-columns: 11ch 1fr; gap: 24px; padding: 22px 0; text-decoration: none; color: var(--ink); }
.articles time { font: 500 13px/1.6 var(--mono); color: var(--muted); }
.articles h3 { font-size: 19px; font-weight: 600; }
.articles p { margin-top: 6px; color: var(--ink-2); font-size: 16px; }
.articles a:hover h3 { color: var(--green); }

.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact dl { margin: 0; display: grid; gap: 18px; }
.contact dt { font: 500 12px/1.4 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.contact dd { margin: 4px 0 0; font-size: 18px; word-break: break-word; }

.site-footer { border-top: 1px solid var(--line); padding-block: 28px; font-size: 14px; color: var(--muted); }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* Article pages */
.article { padding-block: 56px 72px; }
.article .wrap { max-width: 760px; }
.article .back { font-size: 15px; text-decoration: none; }
.article h1 { font-size: clamp(30px, 4.2vw, 42px); font-weight: 600; letter-spacing: -.02em; margin-top: 14px; }
.article .dek { margin-top: 16px; font-size: 20px; color: var(--ink-2); }
.article .meta { margin-top: 18px; padding-bottom: 24px; border-bottom: 1px solid var(--line); font: 500 13px/1.5 var(--mono); color: var(--muted); }
.prose { margin-top: 32px; display: flex; flex-direction: column; gap: 18px; }
.prose h2 { font-size: 24px; font-weight: 600; margin-top: 18px; }
.prose ul, .prose ol { margin: 0; padding-left: 22px; display: flex; flex-direction: column; gap: 8px; }
.prose strong { font-weight: 600; color: var(--ink); }
.formula { background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--green); border-radius: 6px; padding: 18px 20px; font: 400 15px/1.7 var(--mono); color: var(--ink); overflow-x: auto; }
.formula b { font-weight: 600; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); }
.prose table { border-collapse: collapse; width: 100%; font-size: 15px; font-variant-numeric: tabular-nums; }
.prose th, .prose td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.prose th { font: 500 12px/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.prose tr:last-child td { border-bottom: 0; }
.prose td.num { text-align: right; font-family: var(--mono); }
.aside { font-size: 15px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 18px; margin-top: 12px; }
.cta { margin-top: 40px; padding: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; display: flex; flex-direction: column; gap: 14px; }
.cta h2 { font-size: 20px; }
.cta p { color: var(--ink-2); }

@media (max-width: 860px) {
  .hero .wrap, .about, .contact { grid-template-columns: 1fr; gap: 32px; }
  .band .wrap { grid-template-columns: repeat(2, 1fr); }
  .fact { border-right: 0; padding-left: 0; border-bottom: 1px solid rgba(159,180,194,.25); }
  .services { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .hero { padding-block: 40px; }
  section.block { padding-block: 52px; }
  .band .wrap { grid-template-columns: 1fr; }
  .articles a { grid-template-columns: 1fr; gap: 6px; }
  .ledger li { grid-template-columns: 1fr; gap: 2px; }
  .service { padding: 22px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

.brand img { width: 34px; height: auto; display: block; }
:root[data-theme="dark"] .brand img { background: #fff; border-radius: 6px; padding: 3px; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .brand img { background: #fff; border-radius: 6px; padding: 3px; } }