/* ==========================================================================
   GTECQ Química — landing page
   Cores extraídas da logo (azul + verdes). Sem fontes ou recursos externos.
   ========================================================================== */

:root {
  --blue: #1f7ab8;
  --blue-600: #1b6aa3;
  --blue-50: #eaf4fb;
  --green: #4caf3f;
  --green-700: #2f7d32;
  --green-900: #2f5a2e;
  --green-50: #ecf7ea;

  --bg: #ffffff;
  --bg-alt: #f5f8fa;
  --surface: #ffffff;
  --text: #15232e;
  --muted: #5a6b78;
  --border: #e2e9ee;
  --shadow: 0 1px 2px rgb(16 40 60 / .05), 0 8px 24px rgb(16 40 60 / .07);
  --shadow-lg: 0 2px 4px rgb(16 40 60 / .06), 0 20px 48px rgb(16 40 60 / .12);

  --grad: linear-gradient(120deg, var(--blue) 0%, var(--green) 100%);
  --radius: 18px;
  --radius-sm: 10px;
  --container: 1160px;
  --header-h: 76px;

  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1820;
    --bg-alt: #111f29;
    --surface: #152632;
    --text: #e6eef3;
    --muted: #9fb0bc;
    --border: #23384a;
    --blue-50: #13293a;
    --green-50: #152a1c;
    --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 8px 24px rgb(0 0 0 / .25);
    --shadow-lg: 0 2px 4px rgb(0 0 0 / .3), 0 20px 48px rgb(0 0 0 / .4);
  }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.02em; text-wrap: balance; }
h1 { font-size: clamp(2.2rem, 5.2vw, 3.75rem); font-weight: 800; }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.6rem); font-weight: 800; }
h3 { font-size: 1.2rem; font-weight: 700; }
p { margin: 0 0 1em; }
address { font-style: normal; }

:focus-visible { outline: 3px solid var(--green); outline-offset: 3px; border-radius: 4px; }

.container { width: min(100% - 32px, var(--container)); margin-inline: auto; }

.skip-link {
  position: absolute; left: 16px; top: -100px; z-index: 100;
  background: var(--blue); color: #fff; padding: .6em 1em; border-radius: var(--radius-sm);
}
.skip-link:focus { top: 12px; }

.eyebrow {
  display: inline-block;
  font-size: .8rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--green-700);
  margin-bottom: .9em;
}
@media (prefers-color-scheme: dark) { .eyebrow { color: var(--green); } }

.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- Botões ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5em;
  padding: .85em 1.5em;
  font: inherit; font-weight: 700; font-size: 1rem;
  color: #fff; background: var(--grad); background-size: 140% 100%;
  border: 0; border-radius: 999px; cursor: pointer;
  box-shadow: 0 6px 18px rgb(31 122 184 / .28);
  transition: transform .2s, box-shadow .2s, background-position .4s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); background-position: 100% 0; box-shadow: 0 10px 26px rgb(31 122 184 / .35); }
.btn-sm { padding: .55em 1.15em; font-size: .95rem; }
.btn-ghost { background: transparent; color: var(--text); border: 2px solid var(--border); box-shadow: none; }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); box-shadow: none; }
.btn-light { background: #fff; color: var(--blue-600); box-shadow: none; }
.btn-light:hover { box-shadow: 0 8px 20px rgb(0 0 0 / .18); }
.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, box-shadow .3s;
}
.site-header.scrolled { border-color: var(--border); box-shadow: 0 4px 20px rgb(16 40 60 / .06); }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand img { height: 46px; width: auto; }

.nav { display: flex; align-items: center; gap: 30px; }
.nav a:not(.btn) { color: var(--text); font-weight: 600; font-size: .98rem; position: relative; }
.nav a:not(.btn)::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px;
  background: var(--grad); transform: scaleX(0); transition: transform .25s; transform-origin: left;
}
.nav a:not(.btn):hover, .nav a.active { text-decoration: none; }
.nav a:not(.btn):hover::after, .nav a.active::after { transform: scaleX(1); }

.lang-switch { display: flex; align-items: center; gap: 2px; padding: 3px; border: 1px solid var(--border); border-radius: 999px; font-size: .8rem; font-weight: 700; }
.lang-switch > * { padding: .3em .7em; border-radius: 999px; line-height: 1.2; }
.lang-switch span { background: var(--blue-50); color: var(--blue); }
.nav .lang-switch a { color: var(--muted); font-size: inherit; }
.nav .lang-switch a:hover { color: var(--text); text-decoration: none; }
.nav .lang-switch a::after { display: none; }

.nav-toggle { display: none; }

@media (max-width: 860px) {
  .nav-toggle {
    display: grid; gap: 5px; place-content: center;
    width: 44px; height: 44px; padding: 0;
    background: none; border: 0; cursor: pointer;
  }
  .nav-toggle span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .3s, opacity .3s; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px 16px 24px;
    background: var(--bg); border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg);
    transform: translateY(-12px); opacity: 0; visibility: hidden;
    transition: transform .25s, opacity .25s, visibility .25s;
  }
  .nav.open { transform: none; opacity: 1; visibility: visible; }
  .nav a:not(.btn) { padding: 14px 4px; border-bottom: 1px solid var(--border); }
  .nav a:not(.btn)::after { display: none; }
  .nav .btn { margin-top: 16px; }
  .nav .lang-switch { align-self: center; margin-top: 16px; }
  .nav .lang-switch a { padding: .3em .7em; border: 0; }
}

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: clamp(56px, 9vw, 120px) 0 clamp(64px, 9vw, 110px); }
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.bubble { position: absolute; border-radius: 50%; filter: blur(60px); opacity: .35; }
.b1 { width: 520px; height: 520px; background: var(--blue); top: -220px; right: -120px; }
.b2 { width: 420px; height: 420px; background: var(--green); bottom: -240px; left: -160px; opacity: .25; }
.b3 { width: 220px; height: 220px; background: var(--green); top: 30%; right: 30%; opacity: .15; }
.b4 { width: 180px; height: 180px; background: var(--blue); bottom: 10%; left: 40%; opacity: .12; }

.hero-inner { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 48px; }
.lead { font-size: clamp(1.08rem, 1.6vw, 1.25rem); color: var(--muted); max-width: 36em; margin-bottom: 2em; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-art svg { width: 100%; max-width: 440px; margin-inline: auto; overflow: visible; filter: drop-shadow(0 24px 40px rgb(31 122 184 / .25)); }
.ring-outer, .ring-inner { transform-origin: 200px 200px; }
.ring-outer { animation: wobble 14s ease-in-out infinite; }
.ring-inner { animation: wobble 10s ease-in-out infinite reverse; }
.float { animation: float 6s ease-in-out infinite; }
.f2 { animation-delay: -2s; animation-duration: 7s; }
.f3 { animation-delay: -4s; animation-duration: 5s; }

@keyframes wobble { 50% { transform: rotate(8deg) scale(1.02); } }
@keyframes float { 50% { transform: translateY(-14px); } }

@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; text-align: left; }
  .hero-art { order: -1; }
  .hero-art svg { max-width: 220px; margin-inline: 0; }
}

/* ---------- Seções ---------- */
.section { padding: clamp(72px, 10vw, 120px) 0; }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 680px; margin: 0 auto clamp(40px, 6vw, 64px); text-align: center; }
.section-head p:last-child { color: var(--muted); }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow);
}

.icon {
  flex: none; display: grid; place-items: center;
  width: 52px; height: 52px; border-radius: 14px;
  background: var(--blue-50); color: var(--blue);
}
.icon svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- Sobre ---------- */
.about { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(40px, 6vw, 80px); align-items: start; }
.about-text p { color: var(--muted); }
.about-text strong { color: var(--text); }
blockquote {
  margin: 28px 0 0; padding: 18px 24px;
  border-left: 4px solid var(--green); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--green-50);
  font-size: 1.15rem; font-weight: 600; font-style: italic;
}
.mvv { display: grid; gap: 18px; }
.mvv .card h3 { display: flex; align-items: center; gap: 10px; }
.mvv .card h3::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--grad); }
.mvv .card p { color: var(--muted); margin: 0; }
.values ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 14px 20px; }
.values li { color: var(--muted); font-size: .95rem; line-height: 1.5; }
.values b { display: block; color: var(--text); }

@media (max-width: 900px) { .about { grid-template-columns: 1fr; } }
@media (max-width: 480px) { .values ul { grid-template-columns: 1fr; } }

/* ---------- Áreas de atuação ---------- */
.areas { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.area {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow);
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.area:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: color-mix(in srgb, var(--blue) 35%, var(--border)); }
.area .icon { margin-bottom: 20px; }
.area:nth-child(even) .icon { background: var(--green-50); color: var(--green-700); }
@media (prefers-color-scheme: dark) { .area:nth-child(even) .icon { color: var(--green); } }
.area h3 { margin-bottom: .15em; }
.line-name { font-size: .85rem; font-weight: 700; color: var(--blue); margin-bottom: .9em; }
.area > p:not(.line-name) { color: var(--muted); font-size: .98rem; }
.chips { list-style: none; margin: auto 0 0; padding: 8px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.chips li { font-size: .8rem; font-weight: 600; padding: .35em .8em; border-radius: 999px; background: var(--bg-alt); border: 1px solid var(--border); }

.area-cta { background: var(--grad); color: #fff; border: 0; justify-content: center; }
.area-cta:hover { border: 0; }
.area-cta p { color: rgb(255 255 255 / .9) !important; }
.area-cta .btn { align-self: flex-start; margin-top: 8px; }

@media (max-width: 980px) { .areas { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .areas { grid-template-columns: 1fr; } }

/* ---------- Diferenciais ---------- */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px 36px; }
.feature .icon { margin-bottom: 18px; background: var(--grad); color: #fff; }
.feature p { color: var(--muted); margin: 0; }

@media (max-width: 900px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }

/* ---------- Contato ---------- */
.contact-section { background: linear-gradient(180deg, var(--bg-alt), var(--bg)); }
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 6vw, 72px); align-items: start; }
.contact-info > p { color: var(--muted); }
.contact-list { list-style: none; margin: 32px 0 0; padding: 0; display: grid; gap: 24px; }
.contact-list li { display: flex; gap: 16px; align-items: flex-start; }
.contact-list small { display: block; font-size: .78rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.contact-list a:not(.link-arrow) { color: var(--text); font-size: 1.15rem; font-weight: 700; }
.contact-list address { color: var(--text); }
.link-arrow { display: inline-block; margin-top: 6px; font-weight: 600; }
.link-arrow::after { content: " →"; }

.contact-form { padding: clamp(24px, 4vw, 36px); }
.form-note { color: var(--muted); font-size: .9rem; }
.field { display: grid; gap: 6px; margin-bottom: 16px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
label { font-size: .9rem; font-weight: 600; }
input, select, textarea {
  width: 100%; font: inherit; font-size: 1rem; color: var(--text);
  background: var(--bg); border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  padding: .75em .9em; transition: border-color .2s, box-shadow .2s;
}
textarea { resize: vertical; min-height: 120px; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 4px rgb(31 122 184 / .15); }
[aria-invalid="true"] { border-color: #d64545; }
.form-error { color: #d64545; font-size: .9rem; font-weight: 600; }

@media (max-width: 900px) { .contact { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .field-row { grid-template-columns: 1fr; gap: 0; } }

/* ---------- Footer ---------- */
.site-footer { background: #0b1a24; color: #b8c7d2; padding: 56px 0 32px; font-size: .95rem; }
.footer-inner { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 40px; }
.footer-brand img { height: 52px; width: auto; margin-bottom: 14px; }
.footer-nav { display: grid; gap: 8px; align-content: start; }
.footer-nav a { color: #e6eef3; }
.footer-legal p { margin-bottom: .8em; }

@media (max-width: 760px) { .footer-inner { grid-template-columns: 1fr; gap: 28px; } }

/* ---------- Animações de entrada ---------- */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.js .reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}