/* =========================================================
   Fio Guia · Página Institucional
   Sistema de marca — Direção 02 · O Fio + Farol
   Tom: quiet luxury · gravidade silenciosa
   ========================================================= */

:root {
  /* Paleta — 80% neutros, 20% verde */
  --ink: #15242F;       /* Ink Petróleo — fundo principal */
  --ink-2: #1B2E3A;     /* variação sutil do ink */
  --green-bg: #395750;  /* Verde Fundo — blocos */
  --water: #6FA79A;     /* Verde-Água — sotaque: o fio, links */
  --greige: #CDBFAC;    /* neutro quente */
  --marfim: #EFE9DD;    /* respiro, fundos claros, texto sobre escuro */

  --marfim-dim: rgba(239, 233, 221, 0.66);
  --marfim-faint: rgba(239, 233, 221, 0.40);
  --hairline: rgba(239, 233, 221, 0.14);
  --hairline-strong: rgba(239, 233, 221, 0.22);

  /* Tipografia */
  --serif: "Cormorant Garamond", Georgia, serif;
  --sans: "Hanken Grotesk", system-ui, -apple-system, sans-serif;
  --mono: "Space Mono", ui-monospace, "Courier New", monospace;

  --maxw: 1180px;
  --gutter: clamp(1.25rem, 5vw, 4.5rem);
  --section-pad: clamp(4.5rem, 10vw, 9rem);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--marfim);
  font-family: var(--sans);
  font-weight: 300;
  font-size: clamp(1rem, 0.97rem + 0.2vw, 1.0625rem);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
em { font-style: italic; }

::selection { background: var(--water); color: var(--ink); }

/* ---------- Tipos utilitários ---------- */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--water);
  margin: 0 0 1.5rem;
}
.section--marfim .eyebrow,
.section--green .eyebrow { color: var(--green-bg); }
.section--green .eyebrow { color: rgba(239,233,221,0.7); }

.section__title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.9rem, 1.3rem + 3vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0 0 1.5rem;
  max-width: 18ch;
}
.section__lead {
  font-size: clamp(1.05rem, 1rem + 0.4vw, 1.25rem);
  color: var(--marfim-dim);
  max-width: 56ch;
  margin: 0 0 3rem;
}
.muted { color: var(--marfim-faint); }

/* ---------- Layout ---------- */
.wrap { width: min(var(--maxw), 100%); margin-inline: auto; padding-inline: var(--gutter); }
.wrap--narrow { width: min(820px, 100%); }
.center { text-align: center; }

.section { padding-block: var(--section-pad); position: relative; }

/* âncoras não ficam sob o cabeçalho fixo */
:where(section[id], header[id]) { scroll-margin-top: 80px; }
.section--ink    { background: var(--ink); }
.section--green  { background: var(--green-bg); }
.section--marfim { background: var(--marfim); color: var(--ink); }
.section--marfim .section__lead { color: rgba(21,36,47,0.66); }

/* hairline divider between consecutive dark sections */
.section--ink + .section--ink { border-top: 1px solid var(--hairline); }

/* =========================================================
   O FIO — elemento gráfico
   ========================================================= */
.fio { color: var(--water); width: 220px; max-width: 60%; margin: 2rem 0; }
.fio svg { width: 100%; height: auto; overflow: visible; }
.fio--center { margin-inline: auto; }
.fio--vertical { transform: rotate(90deg); width: 140px; }

/* fio draw-in animation when revealed */
.fio svg path { stroke-dasharray: 320; stroke-dashoffset: 320; }
.reveal.is-visible .fio svg path,
.fio.is-visible svg path { animation: draw 1.6s cubic-bezier(.6,.05,.2,1) forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }

/* =========================================================
   HEADER
   ========================================================= */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.1rem var(--gutter);
  padding-left: max(var(--gutter), env(safe-area-inset-left));
  padding-right: max(var(--gutter), env(safe-area-inset-right));
  background: rgba(21, 36, 47, 0);
  transition: background .4s ease, padding .4s ease, box-shadow .4s ease;
}
.site-header.is-scrolled {
  background: rgba(21, 36, 47, 0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding-block: 0.8rem;
  box-shadow: 0 1px 0 var(--hairline);
}
.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand__seal { width: 38px; height: 38px; border-radius: 50%; }
.brand__word {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}
.nav { display: flex; align-items: center; gap: clamp(1rem, 2vw, 2.2rem); }
.nav a {
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  color: var(--marfim-dim);
  transition: color .25s ease;
  position: relative;
}
.nav a:not(.nav__cta)::after {
  content: ""; position: absolute; left: 0; bottom: -6px;
  width: 100%; height: 1px; background: var(--water);
  transform: scaleX(0); transform-origin: left; transition: transform .3s ease;
}
.nav a:hover { color: var(--marfim); }
.nav a:not(.nav__cta):hover::after { transform: scaleX(1); }
.nav__cta {
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  padding: 0.5rem 1.1rem;
  color: var(--marfim);
}
.nav__cta:hover { background: var(--water); border-color: var(--water); color: var(--ink); }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: 6px;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--marfim); transition: .3s; }

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8rem var(--gutter) 5rem;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 80% 10%, rgba(57,87,80,0.45) 0%, rgba(21,36,47,0) 55%),
    radial-gradient(90% 70% at 10% 100%, rgba(111,167,154,0.10) 0%, rgba(21,36,47,0) 60%),
    var(--ink);
}
.hero__symbol {
  position: absolute;
  right: clamp(-3rem, 2vw, 4rem);
  top: 50%;
  transform: translateY(-50%);
  width: clamp(280px, 38vw, 540px);
  color: var(--marfim);
  opacity: 0.06;
  pointer-events: none;
}
.hero__symbol svg { width: 100%; height: auto; }

.hero__inner { position: relative; width: min(var(--maxw), 100%); margin-inline: auto; }
.hero__title {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(2.8rem, 1.6rem + 6vw, 6rem);
  line-height: 1.02;
  letter-spacing: -0.015em;
  margin: 0 0 1.8rem;
}
.hero__lead {
  font-size: clamp(1.1rem, 1rem + 0.6vw, 1.4rem);
  font-weight: 300;
  color: var(--marfim-dim);
  max-width: 44ch;
  margin: 0;
}
.hero__lead em { color: var(--water); font-style: italic; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.6rem; }

.hero__scroll {
  position: absolute; left: 50%; bottom: 2rem; transform: translateX(-50%);
  width: 26px; height: 42px; border: 1px solid var(--hairline-strong); border-radius: 14px;
  display: grid; place-items: start center; padding-top: 8px;
}
.hero__scroll span {
  width: 3px; height: 8px; border-radius: 2px; background: var(--water);
  animation: scrolldot 1.8s ease-in-out infinite;
}
@keyframes scrolldot { 0%,100%{ transform: translateY(0); opacity:1 } 60%{ transform: translateY(12px); opacity:0 } }

/* =========================================================
   BOTÕES
   ========================================================= */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--sans); font-size: 0.92rem; font-weight: 500; letter-spacing: 0.01em;
  padding: 0.85rem 1.6rem; border-radius: 999px;
  cursor: pointer; transition: transform .25s ease, background .25s ease, color .25s ease, border-color .25s ease;
  border: 1px solid transparent;
}
.btn:hover { transform: translateY(-2px); }
.btn--solid { background: var(--water); color: var(--ink); }
.btn--solid:hover { background: var(--marfim); }
.btn--ghost { border-color: var(--hairline-strong); color: var(--marfim); }
.btn--ghost:hover { border-color: var(--water); color: var(--water); }
.section--marfim .btn--ghost { border-color: rgba(21,36,47,0.25); color: var(--ink); }

/* =========================================================
   MANIFESTO
   ========================================================= */
.manifesto .section__title { max-width: 22ch; }
.manifesto__body {
  display: grid; gap: 1.6rem;
  max-width: 62ch; margin-top: 2.5rem;
  font-size: clamp(1.05rem, 1rem + 0.4vw, 1.2rem);
  color: var(--marfim-dim);
}
.manifesto__body strong { color: var(--marfim); font-weight: 500; }
.manifesto__highlight {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.4rem, 1.1rem + 1.2vw, 2rem) !important;
  line-height: 1.3;
  color: var(--marfim) !important;
  border-left: 2px solid var(--water);
  padding-left: 1.5rem;
  margin-top: 1rem;
}

/* =========================================================
   CARDS (propósito / princípios)
   ========================================================= */
.cards { display: grid; gap: 1.5rem; margin-top: 1rem; }
.cards--3 { grid-template-columns: repeat(3, 1fr); }

.card { padding: 2rem 1.9rem; border-radius: 4px; }
.section--green .card { background: rgba(21,36,47,0.30); }
.card__label {
  font-family: var(--serif); font-style: italic; font-size: 1.5rem;
  color: var(--water); display: block; margin-bottom: 1rem;
}
.section--green .card__label { color: var(--marfim); }
.card p { margin: 0; color: var(--marfim-dim); }
.section--green .card p { color: rgba(239,233,221,0.82); }

.card--bordered {
  border: 1px solid var(--hairline);
  background: var(--ink-2);
  transition: border-color .3s ease, transform .3s ease;
  position: relative;
}
.card--bordered:hover { border-color: var(--water); transform: translateY(-3px); }
.card__index {
  font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.15em;
  color: var(--water); display: block; margin-bottom: 1rem;
}
.card--bordered h3 {
  font-family: var(--serif); font-weight: 500; font-size: 1.5rem;
  margin: 0 0 0.7rem; letter-spacing: -0.01em;
}
.principios__grid { margin-top: 2.5rem; }

/* =========================================================
   PARA QUEM — stages
   ========================================================= */
.stages { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 2.5rem; }
.stage {
  padding: 2rem 1.6rem 2rem 0;
  border-top: 1px solid var(--hairline);
}
.stage + .stage { padding-left: 1.6rem; border-left: 1px solid var(--hairline); }
.stage__num {
  font-family: var(--serif); font-size: 2.4rem; color: var(--water);
  display: block; line-height: 1; margin-bottom: 1rem;
}
.stage h3 {
  font-family: var(--serif); font-weight: 500; font-size: 1.35rem;
  margin: 0 0 0.6rem;
}
.stage p { margin: 0; color: var(--marfim-dim); font-size: 0.96rem; }

/* =========================================================
   PROMESSA — citação
   ========================================================= */
.promessa { padding-block: clamp(5rem, 11vw, 10rem); }
.promessa__quote {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(1.8rem, 1.2rem + 3vw, 3.4rem);
  line-height: 1.22; letter-spacing: -0.01em;
  margin: 1.5rem 0; color: var(--ink);
}
.promessa__quote em { color: var(--green-bg); font-style: italic; }
.promessa__cite {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.2em;
  text-transform: uppercase; color: rgba(21,36,47,0.5); margin: 0;
}

/* =========================================================
   MÉTODO SOAP
   ========================================================= */
.soap { list-style: none; padding: 0; margin: 2.5rem 0 0; display: grid; gap: 0; }
.soap__item {
  display: grid; grid-template-columns: 90px 1fr; gap: clamp(1rem, 3vw, 2.5rem);
  align-items: baseline;
  padding: 2rem 0;
  border-top: 1px solid rgba(239,233,221,0.16);
}
.soap__item:last-child { border-bottom: 1px solid rgba(239,233,221,0.16); }
.soap__letter {
  font-family: var(--serif); font-size: clamp(3rem, 2rem + 3vw, 4.5rem);
  line-height: 0.8; color: var(--marfim);
}
.soap__item h3 {
  font-family: var(--serif); font-weight: 500; font-size: clamp(1.3rem, 1rem + 1vw, 1.7rem);
  margin: 0 0 0.4rem;
}
.soap__item p { margin: 0; color: rgba(239,233,221,0.78); max-width: 60ch; }

/* =========================================================
   TRANSFORMAÇÃO A → B
   ========================================================= */
.ab {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center; margin-top: 2.5rem;
}
.ab__col { padding: 2rem; border-radius: 4px; }
.ab__col--a { background: rgba(21,36,47,0.05); border: 1px solid rgba(21,36,47,0.12); }
.ab__col--b { background: var(--green-bg); color: var(--marfim); }
.ab__tag {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.18em; text-transform: uppercase;
  display: block; margin-bottom: 1.4rem;
}
.ab__col--a .ab__tag { color: rgba(21,36,47,0.55); }
.ab__col--b .ab__tag { color: var(--water); }
.ab ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.9rem; }
.ab li { position: relative; padding-left: 1.5rem; line-height: 1.45; }
.ab li::before {
  content: ""; position: absolute; left: 0; top: 0.65em;
  width: 7px; height: 7px; border-radius: 50%;
}
.ab__col--a li { color: rgba(21,36,47,0.7); }
.ab__col--a li::before { background: rgba(21,36,47,0.3); }
.ab__col--b li::before { background: var(--water); }
.ab__arrow { display: grid; place-items: center; color: var(--green-bg); }
.ab__arrow .fio { margin: 0; width: 120px; }

/* =========================================================
   CONTATO — formulário
   ========================================================= */
.contato .section__title em { color: var(--water); font-style: italic; }
.form { margin-top: 1rem; display: grid; gap: 1.4rem; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
.field { display: grid; gap: 0.5rem; }
.field label {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--marfim-faint);
}
.field input, .field textarea {
  width: 100%;
  background: var(--ink-2);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  color: var(--marfim);
  font-family: var(--sans); font-size: 1rem; font-weight: 300;
  padding: 0.85rem 1rem;
  transition: border-color .25s ease, background .25s ease;
}
.field textarea { resize: vertical; min-height: 110px; }
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--water); background: rgba(111,167,154,0.06);
}
.field input:invalid:not(:placeholder-shown) { border-color: rgba(200,120,110,0.5); }
.form__footer { display: flex; flex-wrap: wrap; align-items: center; gap: 1.2rem 1.6rem; margin-top: 0.5rem; }
.form__note { margin: 0; font-size: 0.82rem; color: var(--marfim-faint); max-width: 34ch; }
.form__status { margin: 0; font-size: 0.92rem; min-height: 1.2em; }
.form__status.is-ok { color: var(--water); }
.form__status.is-err { color: #d98a7e; }

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer { background: var(--ink); border-top: 1px solid var(--hairline); padding-top: clamp(3rem, 6vw, 5rem); }
.site-footer__inner {
  display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 2.5rem;
  align-items: start; padding-bottom: 3rem;
}
.site-footer__brand { display: flex; align-items: center; gap: 0.9rem; }
.site-footer__brand .brand__seal { width: 52px; height: 52px; }
.site-footer__word { font-family: var(--serif); font-size: 1.5rem; margin: 0; font-weight: 500; }
.site-footer__tag { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--marfim-faint); margin: 0.3rem 0 0; }
.site-footer__nav { display: grid; gap: 0.7rem; }
.site-footer__nav a { color: var(--marfim-dim); font-size: 0.92rem; transition: color .25s; }
.site-footer__nav a:hover { color: var(--water); }
.site-footer__contact a { color: var(--marfim); border-bottom: 1px solid var(--hairline-strong); padding-bottom: 2px; transition: border-color .25s; }
.site-footer__contact a:hover { border-color: var(--water); }
.site-footer__contact .fio { margin-top: 1.5rem; width: 180px; }
.site-footer__copy {
  text-align: center; font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em;
  color: var(--marfim-faint); padding: 1.6rem var(--gutter); margin: 0;
  border-top: 1px solid var(--hairline);
}

/* =========================================================
   REVEAL — gravidade silenciosa
   ========================================================= */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 1s ease, transform 1s cubic-bezier(.2,.7,.2,1); }
.reveal.is-visible { opacity: 1; transform: none; }
/* stagger children naturally */
.cards .reveal:nth-child(2) { transition-delay: .08s; }
.cards .reveal:nth-child(3) { transition-delay: .16s; }
.cards .reveal:nth-child(4) { transition-delay: .08s; }
.cards .reveal:nth-child(5) { transition-delay: .16s; }
.cards .reveal:nth-child(6) { transition-delay: .24s; }

/* =========================================================
   RESPONSIVO
   ========================================================= */
@media (max-width: 900px) {
  .cards--3 { grid-template-columns: 1fr 1fr; }
  .stages { grid-template-columns: 1fr 1fr; }
  .stage, .stage + .stage { border-left: 0; padding-left: 0; }
  .stage + .stage { padding-left: 0; }
  .ab { grid-template-columns: 1fr; }
  .ab__arrow .fio { transform: rotate(90deg); margin: 0.5rem auto; }
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav { display: none; }
  .nav.is-open {
    display: flex; flex-direction: column; align-items: stretch; gap: 0.4rem;
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(21,36,47,0.98); backdrop-filter: blur(12px);
    padding: 0.8rem var(--gutter) 1.6rem; border-top: 1px solid var(--hairline);
  }
  /* alvos de toque maiores no menu mobile */
  .nav.is-open a { padding: 0.85rem 0; font-size: 1.05rem; border-bottom: 1px solid var(--hairline); }
  .nav.is-open a:last-child { border-bottom: 0; }
  .nav.is-open .nav__cta {
    margin-top: 0.6rem; text-align: center; border: 1px solid var(--water);
    border-radius: 999px; color: var(--water);
  }
  .nav.is-open a:not(.nav__cta)::after { display: none; }
  .nav-toggle { display: flex; }
  .nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.is-open span:nth-child(2) { opacity: 0; }
  .nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

@media (max-width: 600px) {
  :root { --section-pad: clamp(3.5rem, 13vw, 5rem); }
  .cards--3 { grid-template-columns: 1fr; }
  .stages { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .site-footer__inner { grid-template-columns: 1fr; text-align: left; }
  .site-footer__contact .fio { margin-inline: 0; }

  /* hero mais respirado e legível no celular */
  .hero { padding-top: 6.5rem; min-height: 92svh; }
  .hero__symbol { opacity: 0.045; right: -5rem; width: 300px; }
  .hero__lead { font-size: 1.08rem; }

  /* botões ocupam a largura — alvo de toque confortável */
  .hero__actions { flex-direction: column; align-items: stretch; gap: 0.8rem; }
  .btn { width: 100%; justify-content: center; padding-block: 1rem; font-size: 1rem; }

  /* SOAP: coluna da letra mais enxuta */
  .soap__item { grid-template-columns: 48px 1fr; gap: 1rem; padding: 1.5rem 0; }
  .manifesto__highlight { padding-left: 1.1rem; }
  .card { padding: 1.6rem 1.4rem; }
  .form__footer { flex-direction: column; align-items: stretch; }
  .form__footer .btn { width: 100%; }
  .form__note { text-align: center; max-width: none; }
}

/* evita zoom automático do iOS ao focar campos (mantém ≥16px) */
@media (max-width: 600px) {
  .field input, .field textarea { font-size: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .fio svg path { stroke-dashoffset: 0 !important; }
}