/* Otto Fields
   Layout: ficha técnica. Faixas de largura total, grade de 12 colunas, rótulos em mono como numeração de documento controlado.
   Identidade: grafite e laranja. Todos os tokens de cor ficam nas variáveis abaixo. */

/* ---------- Fontes locais (IBM Plex, subconjunto latin, cobre o português) ---------- */
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:400;font-display:swap;src:url(../assets/fonts/ibm-plex-sans-latin-400-normal.woff2) format("woff2"),url(../assets/fonts/ibm-plex-sans-latin-400-normal.woff) format("woff")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:500;font-display:swap;src:url(../assets/fonts/ibm-plex-sans-latin-500-normal.woff2) format("woff2"),url(../assets/fonts/ibm-plex-sans-latin-500-normal.woff) format("woff")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-weight:600;font-display:swap;src:url(../assets/fonts/ibm-plex-sans-latin-600-normal.woff2) format("woff2"),url(../assets/fonts/ibm-plex-sans-latin-600-normal.woff) format("woff")}
@font-face{font-family:"IBM Plex Sans Condensed";font-style:normal;font-weight:500;font-display:swap;src:url(../assets/fonts/ibm-plex-sans-condensed-latin-500-normal.woff2) format("woff2"),url(../assets/fonts/ibm-plex-sans-condensed-latin-500-normal.woff) format("woff")}
@font-face{font-family:"IBM Plex Sans Condensed";font-style:normal;font-weight:600;font-display:swap;src:url(../assets/fonts/ibm-plex-sans-condensed-latin-600-normal.woff2) format("woff2"),url(../assets/fonts/ibm-plex-sans-condensed-latin-600-normal.woff) format("woff")}
@font-face{font-family:"IBM Plex Sans Condensed";font-style:normal;font-weight:700;font-display:swap;src:url(../assets/fonts/ibm-plex-sans-condensed-latin-700-normal.woff2) format("woff2"),url(../assets/fonts/ibm-plex-sans-condensed-latin-700-normal.woff) format("woff")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:400;font-display:swap;src:url(../assets/fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2"),url(../assets/fonts/ibm-plex-mono-latin-400-normal.woff) format("woff")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:500;font-display:swap;src:url(../assets/fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2"),url(../assets/fonts/ibm-plex-mono-latin-500-normal.woff) format("woff")}

/* ---------- Tokens ----------
   Paleta da identidade visual: Grafite #1B2228 (base) · Tinta #16191C (texto) · Névoa #F3F4F2 (fundo)
   · Aço #9AA3A9 (apoio) · Sinal #D9601A (destaque, até 5% da área). */
:root{
  --bg:#F3F4F2; --surface:#FFFFFF; --ink:#16191C; --muted:#5A6168; --rule:#D4D7D3;
  --signal:#D9601A; --signal-ink:#FFFFFF; --deep:#1B2228; --deep-ink:#E9ECEA; --deep-muted:#9AA3A9; --deep-rule:#2F3940;
  --error:#B3261E;
  --f-display:"IBM Plex Sans Condensed","Arial Narrow",Arial,sans-serif;
  --f-body:"IBM Plex Sans",-apple-system,"Segoe UI",Arial,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
  --header-h:64px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#12161A; --surface:#181D22; --ink:#E6E9E7; --muted:#9AA3A9; --rule:#2A333A;
  --signal:#EE7A33; --signal-ink:#16191C; --deep:#0C0F12; --deep-ink:#E6E9E7; --deep-muted:#8E979D; --deep-rule:#232B31; --error:#F2B8B5; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#12161A; --surface:#181D22; --ink:#E6E9E7; --muted:#9AA3A9; --rule:#2A333A;
  --signal:#EE7A33; --signal-ink:#16191C; --deep:#0C0F12; --deep-ink:#E6E9E7; --deep-muted:#8E979D; --deep-rule:#232B31; --error:#F2B8B5; color-scheme:dark}

/* ---------- Base ---------- */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
[id]{scroll-margin-top:calc(var(--header-h) + env(safe-area-inset-top,0px))}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.6 var(--f-body);-webkit-font-smoothing:antialiased;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--deep)}
a{color:inherit}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px}
.skip{position:absolute;left:12px;top:-60px;z-index:20;background:var(--signal);color:var(--signal-ink);padding:10px 14px;font-weight:600;text-decoration:none}
.skip:focus{top:12px}
.wrap{max-width:1180px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.band{padding-block:88px}
.band.deep{background:var(--deep);color:var(--deep-ink)}
.label{font:500 12px/1 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.deep .label{color:var(--deep-muted)}
.label b{color:var(--signal);font-weight:500}
h1,h2,h3{font-family:var(--f-display);font-weight:600;letter-spacing:-.01em;text-wrap:balance;margin:0}
h2{font-size:clamp(30px,4vw,44px);line-height:1.08;max-width:22ch}
h3{font-size:21px;line-height:1.2}
p{margin:0}
.lede{font-size:18px;color:var(--muted);max-width:60ch}
.deep .lede{color:var(--deep-muted)}
.head{display:grid;gap:18px;margin-bottom:52px}
.head.flush{margin:0}
.pt0{padding-top:0}
.ph-note{color:var(--signal)}
.inline-link{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;text-decoration-color:var(--signal)}
.inline-link:hover{color:var(--signal)}
.deep-link:hover{color:var(--deep-ink)}
.ico{width:16px;height:16px;flex:none}
.clink{display:inline-flex;align-items:center;gap:8px;text-decoration:none}

/* ---------- Header ---------- */
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:9;background:var(--deep);color:var(--deep-ink);border-bottom:1px solid var(--deep-rule)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:var(--header-h)}
/* Wordmark: marcador Sinal + "Otto" Bold + "Fields" Medium em aço (IBM Plex Sans Condensed).
   Proporções da identidade: marcador ~17% do corpo, como nas aplicações em tamanho pequeno, alinhado à base das letras. */
.logo{display:inline-flex;align-items:flex-end;gap:.12em;font-family:var(--f-display);font-size:28px;line-height:.8;letter-spacing:-.02em;white-space:nowrap;text-decoration:none;color:var(--deep-ink)}
.logo .mk{flex:none;width:.17em;height:.17em;margin-bottom:.12em;background:var(--signal)}
.logo .wm{display:flex;align-items:baseline;gap:.2em}
.logo b{font-weight:700}
.logo .wm span{font-weight:500;color:var(--deep-muted)}
nav.menu{display:flex;gap:26px;font-size:14px}
nav.menu a{text-decoration:none;color:var(--deep-muted)}
nav.menu a:hover{color:var(--deep-ink)}
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--signal);color:var(--signal-ink);font:600 15px/1 var(--f-body);padding:14px 20px;border:0;border-radius:2px;text-decoration:none;cursor:pointer}
.btn:hover{filter:brightness(1.08)}
.btn[disabled]{opacity:.7;cursor:progress}
.btn.ghost{background:transparent;color:inherit;border:1px solid currentColor;opacity:.85}
/* Idioma: bandeira dos EUA no site em português, do Brasil no site em inglês */
.top-actions{display:flex;align-items:center;gap:10px}
.lang{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:2px;opacity:.9}
.lang:hover{opacity:1}
.flag{display:block;width:26px;height:auto;border-radius:2px;box-shadow:0 0 0 1px rgba(255,255,255,.25)}
@media (max-width:860px){nav.menu{display:none}}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--deep);color:var(--deep-ink);overflow:hidden}
.hero .photo{position:absolute;inset:0;background:url(../assets/img/hero-plataforma.jpg) center/cover no-repeat;background-image:image-set(url(../assets/img/hero-plataforma.webp) type("image/webp"),url(../assets/img/hero-plataforma.jpg) type("image/jpeg"));filter:grayscale(1) contrast(1.05);opacity:.42}
@media (max-width:800px){.hero .photo{background-image:url(../assets/img/hero-plataforma-800.jpg);background-image:image-set(url(../assets/img/hero-plataforma-800.webp) type("image/webp"),url(../assets/img/hero-plataforma-800.jpg) type("image/jpeg"))}}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,var(--deep) 18%,transparent 85%)}
.hero .wrap{position:relative;z-index:1;padding-block:104px 72px;display:grid;gap:28px}
.hero h1{font-size:clamp(40px,6.4vw,76px);line-height:1;max-width:15ch}
.hero h1 em{font-style:normal;color:var(--signal)}
.hero .lede{font-size:19px;max-width:54ch;color:var(--deep-ink);opacity:.82}
.spec{position:relative;z-index:1;border-top:1px solid var(--deep-rule)}
.spec .wrap{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));padding-block:0}
.spec .wrap > div{padding:22px 20px 24px 0;border-right:1px solid var(--deep-rule);display:grid;gap:8px}
.spec .wrap > div:last-child{border-right:0}
.spec .wrap > div + div{padding-left:20px}
.spec strong{font:500 15px/1.35 var(--f-body)}
@media (max-width:760px){.spec .wrap{grid-template-columns:1fr 1fr}.spec .wrap > div:nth-child(2){border-right:0}.spec .wrap > div:nth-child(3){padding-left:0}.spec .wrap > div:nth-child(-n+2){border-bottom:1px solid var(--deep-rule)}}

/* ---------- Princípios ---------- */
.principles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--rule)}
.principles article{padding:30px 28px 34px 0;border-bottom:1px solid var(--rule);display:grid;gap:12px;align-content:start}
.principles article:not(:nth-child(3n)){border-right:1px solid var(--rule)}
.principles article:not(:nth-child(3n+1)){padding-left:28px}
.principles p{color:var(--muted)}
@media (max-width:900px){.principles{grid-template-columns:1fr}.principles article{border-right:0!important;padding-left:0!important}}

/* ---------- Faixa de foto ---------- */
.strip{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);min-height:440px}
.strip .ph{background:var(--deep) center/cover no-repeat}
.strip .ph.embarcacao{background-image:url(../assets/img/embarcacao-apoio.jpg);background-image:image-set(url(../assets/img/embarcacao-apoio.webp) type("image/webp"),url(../assets/img/embarcacao-apoio.jpg) type("image/jpeg"))}
@media (max-width:800px){.strip .ph.embarcacao{background-image:url(../assets/img/embarcacao-apoio-800.jpg);background-image:image-set(url(../assets/img/embarcacao-apoio-800.webp) type("image/webp"),url(../assets/img/embarcacao-apoio-800.jpg) type("image/jpeg"))}}
.strip .txt{background:var(--deep);color:var(--deep-ink);padding:64px max(20px,env(safe-area-inset-right,0px)) 64px 56px;display:grid;gap:20px;align-content:center}
.strip .txt h2{max-width:16ch}
.strip .txt p{color:var(--deep-muted);max-width:46ch}
.strip .label{color:var(--deep-muted)}
@media (max-width:860px){.strip{grid-template-columns:1fr}.strip .ph{min-height:260px}.strip .txt{padding:48px max(20px,env(safe-area-inset-right,0px)) 48px max(20px,env(safe-area-inset-left,0px))}}

/* ---------- Módulos ---------- */
.mods{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule)}
.mod{background:var(--surface);padding:28px;display:grid;gap:12px;align-content:start}
.mod p{color:var(--muted)}
@media (max-width:900px){.mods{grid-template-columns:1fr 1fr}}@media (max-width:480px){.mods{grid-template-columns:1fr}}

/* ---------- Segurança ---------- */
.sec{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:56px}
.sec .head{align-content:start}
@media (max-width:900px){.sec{grid-template-columns:1fr;gap:32px}}
.sec-list{display:grid;border-top:1px solid var(--deep-rule);margin:0}
.sec-row{display:grid;grid-template-columns:200px minmax(0,1fr);gap:24px;padding:20px 0;border-bottom:1px solid var(--deep-rule)}
.sec-row dt{font:500 13px/1.5 var(--f-mono);color:var(--deep-ink)}
.sec-row dd{margin:0;color:var(--deep-muted)}
@media (max-width:600px){.sec-row{grid-template-columns:1fr;gap:6px}}
.commit{margin-top:40px;border:1px solid var(--signal);padding:24px 26px;display:grid;gap:10px}
.commit p{color:var(--deep-ink);opacity:.85}

/* ---------- Sobre ---------- */
.about{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,6fr);gap:56px;align-items:center}
.about .ph{aspect-ratio:4/5;max-width:100%;background:center/cover no-repeat;border:1px solid var(--rule);background-image:url(../assets/img/plataforma-mar.jpg);background-image:image-set(url(../assets/img/plataforma-mar.webp) type("image/webp"),url(../assets/img/plataforma-mar.jpg) type("image/jpeg"))}
.about .body{display:grid;gap:18px}
.about .body p{color:var(--muted);max-width:58ch}
@media (max-width:900px){.about{grid-template-columns:1fr}.about .ph{aspect-ratio:16/10}}

/* ---------- Demonstração ---------- */
.demo{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:56px}
@media (max-width:900px){.demo{grid-template-columns:1fr;gap:36px}}
.steps{display:grid;gap:0;margin:28px 0 0;padding:0;border-top:1px solid var(--rule)}
.steps li{list-style:none;display:grid;grid-template-columns:44px minmax(0,1fr);padding:16px 0;border-bottom:1px solid var(--rule)}
.steps .n{font:500 13px var(--f-mono);color:var(--signal)}
.steps p{color:var(--muted);font-size:15px}
form.f{background:var(--surface);border:1px solid var(--rule);padding:30px;display:grid;grid-template-columns:1fr 1fr;gap:18px;min-width:0}
.fld{display:grid;gap:6px;min-width:0}
.fld.full{grid-column:1/-1}
.fld label{font:500 12px/1 var(--f-mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.fld input,.fld select,.fld textarea{font:inherit;font-size:15px;color:var(--ink);background:var(--bg);border:1px solid var(--rule);border-radius:2px;padding:11px 12px;width:100%}
.fld textarea{min-height:96px;resize:vertical}
.fld input:focus,.fld select:focus,.fld textarea:focus{outline:2px solid var(--signal);outline-offset:-1px;border-color:transparent}
.fld [aria-invalid="true"]{border-color:var(--error)}
.form-foot{grid-column:1/-1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px}
.form-foot small{color:var(--muted);font-size:13px;max-width:44ch}
.ok{grid-column:1/-1;border-left:3px solid var(--signal);padding:10px 14px;background:var(--bg);font-size:15px}
.ok.err{border-left-color:var(--error)}
/* Honeypot: invisível para pessoas, preenchido por robôs */
.hp{position:absolute!important;left:-10000px!important;width:1px;height:1px;overflow:hidden}
@media (max-width:600px){form.f{grid-template-columns:1fr;padding:22px}}

/* ---------- Rodapé ---------- */
footer.ft{background:var(--deep);color:var(--deep-muted);padding-block:56px 40px;font-size:14px}
.ft-grid{display:grid;grid-template-columns:minmax(0,4fr) repeat(3,minmax(0,2fr));gap:32px}
.ft-grid > div{min-width:0}
.ft-brand{display:grid;gap:12px;align-content:start}
.ft-brand .logo{color:var(--deep-ink);font-size:32px;justify-self:start;margin-bottom:6px}
.ft-grid h4{font:500 12px/1 var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--deep-ink);margin:0 0 14px}
.ft-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.ft-grid a{text-decoration:none}
.ft-grid a:hover{color:var(--deep-ink)}
.ft-grid .inline-link{text-decoration:underline}
.ft-base{margin-top:44px;padding-top:20px;border-top:1px solid var(--deep-rule);display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font:400 12px/1.6 var(--f-mono)}
@media (max-width:860px){.ft-grid{grid-template-columns:1fr 1fr}}
.ft-grid li{overflow-wrap:anywhere}
@media (prefers-reduced-motion:no-preference){.btn{transition:filter .15s}}