/* ==========================================================================
   Bomdev – Design System
   Identidade: engenharia precisa, minimalista, técnica. Sem frameworks.
   ========================================================================== */

@font-face {
  font-family: "Ubuntu";
  src: url("/static/fonts/Ubuntu-Light-Small.ttf") format("truetype");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Ubuntu";
  src: url("/static/fonts/Ubuntu-Regular-Small.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Ubuntu";
  src: url("/static/fonts/Ubuntu-Medium-Small.ttf") format("truetype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Ubuntu";
  src: url("/static/fonts/Ubuntu-Bold-Small.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  /* Brand surfaces */
  --color-ink: #0a0c10;
  --color-ink-soft: #1b1f26;
  --color-text: #171a1f;
  --color-muted: #5b6472;
  --color-faint: #8a91a0;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f6f8;
  --color-bg-dark: #0a0c10;
  --color-bg-dark-alt: #12151b;
  --color-border: #e3e5ea;
  --color-border-dark: #262a33;

  /* Accent: azul técnico, usado com parcimônia */
  --color-accent: #2048e0;
  --color-accent-strong: #122f9e;
  --color-accent-soft: #eef1fd;
  --color-accent-line: rgba(32, 72, 224, 0.28);

  /* Typography */
  --font: "Ubuntu", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --fs-display: clamp(2.6rem, 5vw + 1rem, 4.5rem);
  --fs-h1: clamp(2rem, 3vw + 1rem, 3rem);
  --fs-h2: clamp(1.5rem, 1.4vw + 1rem, 2.1rem);
  --fs-h3: 1.2rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-label: 0.75rem;
  --lh-tight: 1.15;
  --lh-snug: 1.35;
  --lh-normal: 1.65;

  /* Spacing scale (8pt-based) */
  --sp-1: .25rem;
  --sp-2: .5rem;
  --sp-3: .75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-7: 3rem;
  --sp-8: 4.5rem;
  --sp-9: 6rem;
  --sp-10: 8rem;

  --radius-sm: 4px;
  --radius-md: 6px;
  --max-width: 1180px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --dur: 180ms;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  color: var(--color-text);
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-weight: 400;
}
body.nav-open { overflow: hidden; }

img { max-width: 100%; display: block; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-strong); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--color-accent); outline-offset: 2px;
}

h1, h2, h3 { line-height: var(--lh-tight); font-weight: 700; letter-spacing: -.01em; margin: 0 0 var(--sp-4); }
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p { margin: 0 0 var(--sp-4); }

.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
.narrow { max-width: 760px; }
.muted { color: var(--color-muted); font-size: var(--fs-small); }
.lead { font-size: 1.15rem; color: var(--color-muted); max-width: 640px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: .6rem;
  font-size: var(--fs-label); font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--color-accent); margin: 0 0 var(--sp-3);
}
.eyebrow::before { content: ""; width: 1.5rem; height: 2px; background: var(--color-accent); }

.skip-link { position: absolute; left: -9999px; z-index: 100; }
.skip-link:focus { left: 1rem; top: 1rem; background: var(--color-ink); color: #fff; padding: .6rem 1.1rem; border-radius: var(--radius-sm); }

/* ---------- Buttons & links ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .8rem 1.5rem; border-radius: var(--radius-sm);
  font-weight: 600; font-size: .95rem; text-decoration: none; border: 1px solid transparent;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
  cursor: pointer;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--color-ink); color: #fff; }
.btn-primary:hover { background: var(--color-accent); color: #fff; }
.btn-secondary { border-color: var(--color-border); color: var(--color-text); background: transparent; }
.btn-secondary:hover { border-color: var(--color-ink); color: var(--color-ink); }
.btn-ghost { padding: 0; border: none; color: var(--color-text); font-weight: 600; }
.btn-ghost::after { content: "→"; margin-left: .4rem; display: inline-block; transition: transform var(--dur) var(--ease); }
.btn-ghost:hover { color: var(--color-accent); }
.btn-ghost:hover::after { transform: translateX(3px); }

.link-underline { position: relative; color: inherit; text-decoration: none; }
.link-underline::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -2px; height: 1px;
  background: currentColor; transition: right var(--dur) var(--ease);
}
.link-underline:hover::after { right: 0; }

.badge {
  display: inline-block; padding: .25rem .6rem; border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-sm); font-size: var(--fs-label); font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase; color: var(--color-muted);
}
.badge-accent { color: var(--color-accent); border-color: var(--color-accent-line); background: var(--color-accent-soft); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
/* The translucent/blur effect lives on a pseudo-element (not on .site-header
   itself) because `backdrop-filter` on an ancestor creates a new containing
   block for `position: fixed` descendants - it would otherwise trap the
   fixed-position mobile nav panel inside the header's own (small) box. */
.site-header::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: rgba(255, 255, 255, .92); backdrop-filter: saturate(140%) blur(8px);
}
.site-header.is-scrolled { border-bottom-color: var(--color-border); box-shadow: 0 1px 0 rgba(10, 12, 16, .02); }
.header-inner { display: flex; align-items: center; gap: var(--sp-6); min-height: 76px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; text-decoration: none; }
.brand-logo { display: block; height: 42px; width: auto; }

.site-nav { display: flex; align-items: center; gap: var(--sp-6); margin-left: auto; }
.nav-links, .lang-switch, .site-footer ul { list-style: none; margin: 0; padding: 0; }
.nav-links { display: flex; gap: var(--sp-6); }
.nav-links a {
  position: relative; color: var(--color-text); text-decoration: none; font-weight: 500; font-size: .95rem;
  padding: .3rem 0;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 2px; background: var(--color-accent);
  transition: right var(--dur) var(--ease);
}
.nav-links a:hover::after { right: 0; }
.nav-links a[aria-current="page"] { color: var(--color-ink); font-weight: 700; }
.nav-links a[aria-current="page"]::after { right: 0; background: var(--color-ink); }

.lang-switch { display: flex; gap: .15rem; padding-left: var(--sp-5); border-left: 1px solid var(--color-border); }
.lang-switch a {
  display: inline-block; padding: .25rem .55rem; border-radius: var(--radius-sm);
  font-size: var(--fs-label); font-weight: 700; letter-spacing: .04em; text-decoration: none; color: var(--color-faint);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.lang-switch a:hover { color: var(--color-text); }
.lang-switch a.active { background: var(--color-ink); color: #fff; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* Hamburger icon button */
.nav-toggle {
  display: none; margin-left: auto; align-items: center; gap: .6rem;
  background: none; border: none; padding: .4rem; cursor: pointer; color: var(--color-text);
}
.nav-toggle-box { position: relative; width: 22px; height: 16px; display: block; }
.nav-toggle-line {
  position: absolute; left: 0; width: 100%; height: 2px; background: var(--color-ink); border-radius: 1px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease), top var(--dur) var(--ease);
}
.nav-toggle-line:nth-child(1) { top: 0; }
.nav-toggle-line:nth-child(2) { top: 7px; }
.nav-toggle-line:nth-child(3) { top: 14px; }
.nav-toggle.is-active .nav-toggle-line:nth-child(1) { top: 7px; transform: rotate(45deg); }
.nav-toggle.is-active .nav-toggle-line:nth-child(2) { opacity: 0; }
.nav-toggle.is-active .nav-toggle-line:nth-child(3) { top: 7px; transform: rotate(-45deg); }

/* ---------- Main / sections ---------- */
.site-main { flex: 1; }
.section { padding: var(--sp-9) 0; }
.section-alt { background: var(--color-bg-alt); }
.section-dark { background: var(--color-bg-dark); color: #c9d1db; }
.section-dark h1, .section-dark h2, .section-dark h3 { color: #fff; }
.section-tight { padding: var(--sp-7) 0; }
.section-header { max-width: 640px; margin-bottom: var(--sp-7); }
.actions { display: flex; gap: var(--sp-3); flex-wrap: wrap; margin-top: var(--sp-6); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: var(--sp-9) 0 var(--sp-8);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: var(--sp-8); align-items: center; }
.hero-copy h1 { font-size: var(--fs-display); margin-bottom: var(--sp-5); max-width: 15ch; }
.hero-copy .lead { margin-bottom: 0; }
.hero-visual { position: relative; aspect-ratio: 1 / 1; max-width: 460px; margin-left: auto; }

.hero-diagram { width: 100%; height: 100%; display: block; }
.hero-diagram .diagram-line { stroke: var(--color-border-dark); stroke-width: 1; opacity: .35; }
.hero-diagram .diagram-line-accent { stroke: var(--color-accent); stroke-width: 1.2; opacity: .55; }
.hero-diagram .diagram-node { fill: var(--color-bg); stroke: var(--color-ink); stroke-width: 1.4; }
.hero-diagram .diagram-node-accent { fill: var(--color-accent); stroke: var(--color-accent); }
.hero-diagram .diagram-block { fill: none; stroke: var(--color-ink); stroke-width: 1.2; opacity: .18; }

@media (prefers-reduced-motion: no-preference) {
  .hero-diagram .diagram-node-accent { animation: pulse-node 3.6s var(--ease) infinite; }
  .hero-diagram .diagram-line-accent { animation: dash-flow 7s linear infinite; stroke-dasharray: 6 5; }
}
@keyframes pulse-node { 0%, 100% { opacity: 1; } 50% { opacity: .45; } }
@keyframes dash-flow { to { stroke-dashoffset: -110; } }

/* ---------- Editorial list (posicionamento) ---------- */
.editorial-list { display: flex; flex-direction: column; }
.editorial-item {
  display: grid; grid-template-columns: 5rem 1fr; gap: var(--sp-6);
  padding: var(--sp-7) 0; border-top: 1px solid var(--color-border);
}
.editorial-item:last-child { border-bottom: 1px solid var(--color-border); }
.editorial-number { font-size: 1.6rem; font-weight: 300; color: var(--color-faint); font-variant-numeric: tabular-nums; }
.editorial-body { max-width: 640px; }
.editorial-body h3 { font-size: 1.35rem; margin-bottom: var(--sp-2); }
.editorial-body p { color: var(--color-muted); margin-bottom: var(--sp-3); }

/* ---------- Tech principles grid ---------- */
.tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--color-border-dark); border: 1px solid var(--color-border-dark); }
.tech-item { background: var(--color-bg-dark); padding: var(--sp-6); }
.tech-item .tech-index { font-size: var(--fs-label); font-weight: 700; color: var(--color-accent); letter-spacing: .1em; }
.tech-item h3 { font-size: 1.05rem; margin: var(--sp-3) 0 var(--sp-2); }
.tech-item p { color: #9aa3b2; font-size: var(--fs-small); margin: 0; }

/* ---------- Product card ---------- */
.product-feature {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-8); align-items: center;
  border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--sp-7);
}
.product-visual { aspect-ratio: 4/3; border-radius: var(--radius-sm); background:
  repeating-linear-gradient(135deg, var(--color-bg-alt) 0 2px, transparent 2px 14px),
  var(--color-bg-alt);
  border: 1px solid var(--color-border); position: relative; overflow: hidden;
}
.product-visual::after {
  content: ""; position: absolute; inset: 18%; border: 1px dashed var(--color-accent-line); border-radius: var(--radius-sm);
}
.product-meta { display: flex; align-items: center; gap: var(--sp-3); margin-bottom: var(--sp-4); }

/* ---------- Cards (general) ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--sp-5); margin: var(--sp-6) 0; }
.card { border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--sp-6); background: var(--color-bg); transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease); }
.card:hover { border-color: var(--color-ink); transform: translateY(-2px); }
.card h2, .card h3 { margin-top: 0; }

/* ---------- Timeline (About) ---------- */
.timeline { display: flex; flex-direction: column; }
.timeline-item { display: grid; grid-template-columns: 4rem 1fr; gap: var(--sp-5); position: relative; padding-bottom: var(--sp-7); }
.timeline-item::before {
  content: ""; position: absolute; left: 1.7rem; top: 2.4rem; bottom: -1.2rem; width: 1px; background: var(--color-border);
}
.timeline-item:last-child::before { display: none; }
.timeline-number {
  width: 3.4rem; height: 3.4rem; border-radius: 50%; border: 1px solid var(--color-ink);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: .9rem; flex-shrink: 0;
}
.timeline-body h3 { margin-bottom: var(--sp-1); }
.timeline-body p { color: var(--color-muted); margin: 0; }

/* ---------- Approach grid (About) ---------- */
.approach-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--sp-6); }
.approach-item { border-top: 2px solid var(--color-ink); padding-top: var(--sp-3); }
.approach-item h3 { font-size: 1.05rem; }
.approach-item p { color: var(--color-muted); margin: 0; font-size: var(--fs-small); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: var(--sp-9); align-items: start; }
.contact-panel h1 { margin-bottom: var(--sp-4); }
.contact-info-list { list-style: none; margin: var(--sp-6) 0 0; padding: 0; display: flex; flex-direction: column; gap: var(--sp-4); }
.contact-info-list dt { font-size: var(--fs-label); text-transform: uppercase; letter-spacing: .06em; color: var(--color-faint); margin-bottom: .2rem; }
.contact-info-list dd { margin: 0; font-weight: 500; }

.form-field { margin-bottom: var(--sp-5); }
.form-field label { display: block; font-size: var(--fs-small); font-weight: 600; margin-bottom: var(--sp-2); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-5); }
.form-field input, .form-field textarea {
  width: 100%; font: inherit; font-size: .95rem; padding: .75rem .9rem; border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); background: var(--color-bg); color: var(--color-text);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.form-field textarea { resize: vertical; min-height: 140px; }
.form-field input:focus, .form-field textarea:focus { border-color: var(--color-accent); box-shadow: 0 0 0 3px var(--color-accent-soft); outline: none; }
.form-field.has-error input, .form-field.has-error textarea { border-color: #c92a2a; }
.form-field .field-error { display: none; color: #c92a2a; font-size: var(--fs-label); margin-top: .35rem; }
.form-field.has-error .field-error { display: block; }

.form-status { padding: var(--sp-4); border-radius: var(--radius-sm); font-size: var(--fs-small); margin-top: var(--sp-5); display: none; }
.form-status.is-visible { display: block; }
.form-status-success { background: #eafaf0; color: #146c3c; border: 1px solid #bfe8cf; }
.form-status-error { background: #fdecec; color: #a4231c; border: 1px solid #f3c6c2; }
.contact-form button[type="submit"] { position: relative; }
.contact-form.is-loading button[type="submit"] { opacity: .7; pointer-events: none; }

/* ---------- Misc content (legal, company data) ---------- */
.company-data { display: grid; grid-template-columns: max-content 1fr; gap: .5rem 1.5rem; }
.company-data dt { font-weight: 600; }
.company-data dd { margin: 0; }
address { font-style: normal; }
.legal section { margin-top: var(--sp-7); }
.legal h2 { font-size: 1.2rem; }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Footer ---------- */
.site-footer { background: var(--color-bg-dark); color: #a7afbd; font-size: .92rem; margin-top: var(--sp-9); }
.site-footer a { color: #e6e9ef; }
.site-footer a:hover { color: #fff; }
.site-footer h2 { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: #697082; margin-bottom: var(--sp-4); }
.footer-top { padding: var(--sp-8) 0 var(--sp-7); border-bottom: 1px solid var(--color-border-dark); }
.footer-brand { display: flex; align-items: center; margin-bottom: var(--sp-4); }
.footer-brand img { height: 34px; width: auto; filter: brightness(0) invert(1); }
.footer-tagline { max-width: 320px; color: #8d94a3; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--sp-6); padding: var(--sp-8) 0; }
.footer-grid li { margin-bottom: .5rem; }
.footer-bottom { border-top: 1px solid var(--color-border-dark); padding: var(--sp-5) 0; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--sp-3); color: #697082; font-size: var(--fs-label); }
.footer-lang { display: flex; gap: .25rem; }
.footer-lang a { padding: .2rem .5rem; border: 1px solid var(--color-border-dark); border-radius: var(--radius-sm); font-size: var(--fs-label); color: #8d94a3; }
.footer-lang a.active { background: #fff; color: var(--color-ink); border-color: #fff; }

/* ---------- Mobile ---------- */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 320px; margin: var(--sp-7) auto 0; }
  .product-feature { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .header-inner { min-height: 64px; }
  .brand-logo { height: 32px; }
  .site-nav {
    display: none; position: fixed; inset: 64px 0 0 0; width: 100%; margin-left: 0;
    background: var(--color-bg); padding: var(--sp-6) 1.5rem; overflow-y: auto; z-index: 40;
  }
  .site-nav.open { display: flex; flex-direction: column; align-items: stretch; }
  .nav-links { flex-direction: column; gap: var(--sp-2); }
  .nav-links a { display: block; padding: var(--sp-3) 0; font-size: 1.2rem; border-bottom: 1px solid var(--color-border); }
  .site-nav .lang-switch {
    border-left: none; padding-left: 0; margin-top: auto; padding-top: var(--sp-6);
    border-top: 1px solid var(--color-border);
  }
  .site-nav .lang-switch a { padding: .5rem 1rem; font-size: var(--fs-small); }
  .editorial-item { grid-template-columns: 1fr; gap: var(--sp-2); }
  .editorial-number { font-size: 1.1rem; }
  .tech-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .company-data { grid-template-columns: 1fr; }
}