/* =========================================================
   ARKDIUM — Desenvolvimento & Business Intelligence
   Paleta oficial: vermelho #F50E0E / #A80808 sobre preto
   ========================================================= */

:root {
  --red:        #c81010;
  --red-deep:   #850606;
  --red-soft:   #e24a4a;
  --bg:         #060606;
  --bg-2:       #0c0c0e;
  --bg-card:    #111114;
  --line:       rgba(255, 255, 255, .08);
  --text:       #f4f4f5;
  --muted:      #9a9aa2;
  --radius:     16px;
  --maxw:       1140px;
  --ease:       cubic-bezier(.22, 1, .36, 1);
  --font-head:  "Space Grotesk", system-ui, sans-serif;
  --font-body:  "Inter", system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

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

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
}

/* ===== PRELOADER ===== */
#preloader {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg);
  display: grid; place-items: center;
  transition: opacity .6s var(--ease), visibility .6s;
}
#preloader.hidden { opacity: 0; visibility: hidden; }
.preloader-ring {
  width: 54px; height: 54px; border-radius: 50%;
  border: 3px solid rgba(200, 16, 16, .15);
  border-top-color: var(--red);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== NAVBAR ===== */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  transition: background .35s var(--ease), border-color .35s, padding .35s;
  border-bottom: 1px solid transparent;
}
#navbar.scrolled {
  background: rgba(8, 8, 9, .78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.brand { display: flex; align-items: center; gap: 13px; }
.brand-logo {
  width: 52px; height: 52px; object-fit: contain;
  filter: drop-shadow(0 4px 14px rgba(200, 16, 16, .45));
}
.brand-name {
  font-family: var(--font-head); font-weight: 700;
  letter-spacing: 3px; font-size: 19px;
}
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  font-size: 14.5px; font-weight: 500; color: var(--muted);
  position: relative; transition: color .25s;
}
.nav-links a:not(.nav-cta)::after {
  content: ""; position: absolute; left: 0; bottom: -6px;
  width: 0; height: 2px; background: var(--red);
  transition: width .3s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover:not(.nav-cta)::after { width: 100%; }
.nav-cta {
  padding: 9px 20px; border-radius: 999px;
  background: var(--red); color: #fff !important; font-weight: 600;
  box-shadow: 0 8px 24px -8px rgba(200, 16, 16, .6);
  transition: transform .25s var(--ease), box-shadow .25s;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 30px -8px rgba(200, 16, 16, .8); }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: 6px;
}
.nav-toggle span {
  width: 26px; height: 2px; background: var(--text);
  transition: transform .3s var(--ease), opacity .3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== HERO ===== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden;
  background: radial-gradient(120% 120% at 50% -10%, #16060a 0%, var(--bg) 55%);
}
#sphere { position: absolute; inset: 0; z-index: 1; pointer-events: none; }
#sphere canvas { display: block; }
.hero-glow {
  position: absolute; z-index: 0; top: -10%; left: 50%;
  width: 720px; height: 720px; transform: translateX(-50%);
  background: radial-gradient(circle, rgba(200, 16, 16, .22), transparent 60%);
  filter: blur(40px); pointer-events: none;
}
.hero-content { position: relative; z-index: 3; max-width: 820px; }

.eyebrow {
  display: inline-block; font-family: var(--font-head);
  font-size: 13px; letter-spacing: 3px; text-transform: uppercase;
  color: var(--red-soft); margin-bottom: 22px;
}
.hero-title {
  font-family: var(--font-head); font-weight: 700;
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 1.05; letter-spacing: -1px;
}
.grad {
  background: linear-gradient(120deg, var(--red-soft), var(--red-deep));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.rotator-wrap { display: inline-block; }
.rotator { color: var(--red); border-right: 3px solid var(--red); padding-right: 4px; }

.hero-sub {
  margin-top: 26px; font-size: clamp(1rem, 1.6vw, 1.18rem);
  color: var(--muted); max-width: 620px;
}
.hero-sub strong { color: var(--text); font-weight: 600; }

.hero-actions { display: flex; gap: 16px; margin-top: 38px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-weight: 600; font-size: 15px;
  padding: 14px 30px; border-radius: 999px; cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s, background .25s, border-color .25s;
  border: 1px solid transparent;
}
.btn-primary { background: var(--red); color: #fff; box-shadow: 0 12px 32px -10px rgba(200, 16, 16, .7); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 18px 40px -10px rgba(200, 16, 16, .9); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--red); color: var(--red-soft); transform: translateY(-3px); }
.btn-block { width: 100%; }

.hero-stats {
  list-style: none; display: flex; gap: 44px; margin-top: 54px; flex-wrap: wrap;
}
.hero-stats strong {
  display: block; font-family: var(--font-head); font-size: 2.1rem;
  color: var(--text); line-height: 1;
}
.hero-stats span { font-size: 13.5px; color: var(--muted); }

.scroll-cue {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 3;
  width: 26px; height: 42px; border: 2px solid var(--line); border-radius: 14px;
  display: grid; place-items: start center; padding-top: 8px;
}
.scroll-cue span {
  width: 4px; height: 8px; border-radius: 2px; background: var(--red);
  animation: cue 1.5s var(--ease) infinite;
}
@keyframes cue { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(12px); opacity: 0; } 100% { opacity: 0; } }

/* ===== SECTIONS ===== */
.section { padding: 110px 0; position: relative; }
.section-alt { background: var(--bg-2); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 60px; }
.section-tag {
  display: inline-block; font-family: var(--font-head);
  font-size: 12.5px; letter-spacing: 2.5px; text-transform: uppercase;
  color: var(--red-soft); margin-bottom: 14px;
  padding: 5px 14px; border: 1px solid rgba(200, 16, 16, .3);
  border-radius: 999px;
}
.section-title {
  font-family: var(--font-head); font-weight: 700;
  font-size: clamp(1.8rem, 3.6vw, 2.7rem); line-height: 1.15; letter-spacing: -.5px;
}
.section-desc { color: var(--muted); margin-top: 14px; }
.lead { font-size: 1.12rem; color: var(--text); margin-top: 20px; }
.muted { color: var(--muted); }
.lead strong { color: var(--red-soft); }

.grid-2 {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}

.about-points { margin-top: 28px; display: grid; gap: 12px; }
.about-points > div { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 15px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--red); box-shadow: 0 0 12px var(--red); flex-shrink: 0; }

/* code window */
.code-window {
  background: #0b0b0e; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: 0 30px 80px -30px rgba(0, 0, 0, .8);
}
.code-bar { display: flex; gap: 8px; padding: 14px 16px; border-bottom: 1px solid var(--line); background: #0e0e12; }
.code-bar span { width: 12px; height: 12px; border-radius: 50%; background: #2a2a30; }
.code-bar span:first-child { background: var(--red); }
.code-window pre { padding: 22px; overflow-x: auto; }
.code-window code {
  font-family: "JetBrains Mono", ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 13.5px; line-height: 1.8; color: #d7d7df; white-space: pre;
}
.c-key { color: var(--red-soft); } .c-str { color: #7fd1a8; } .c-com { color: #5b5b66; font-style: italic; }

/* cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 28px; position: relative; overflow: hidden;
  transition: transform .35s var(--ease), border-color .35s, box-shadow .35s;
}
.card::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(120% 120% at 0 0, rgba(200, 16, 16, .1), transparent 50%);
  opacity: 0; transition: opacity .35s;
}
.card:hover { transform: translateY(-6px); border-color: rgba(200, 16, 16, .4); box-shadow: 0 24px 50px -24px rgba(200, 16, 16, .35); }
.card:hover::before { opacity: 1; }
.card-ico {
  width: 52px; height: 52px; border-radius: 13px;
  display: grid; place-items: center; font-size: 22px; font-weight: 700;
  background: linear-gradient(135deg, rgba(200, 16, 16, .18), rgba(168, 8, 8, .1));
  border: 1px solid rgba(200, 16, 16, .3); color: var(--red-soft);
  margin-bottom: 20px; font-family: var(--font-head);
}
.card h3 { font-family: var(--font-head); font-size: 1.22rem; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15px; }

/* serviços — logo de marca d'água sob camada "insulfilm" */
#servicos { position: relative; overflow: hidden; }
#servicos::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: url("../images/logo.png") no-repeat;
  background-position: center top;
  background-size: min(620px, 80%);
  opacity: .12;
}
#servicos::after {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(120% 90% at 50% 50%, rgba(200, 16, 16, .08), transparent 55%),
    linear-gradient(180deg, rgba(10, 8, 9, .72), rgba(6, 6, 6, .9));
}
#servicos > .container { position: relative; z-index: 1; }

/* processo — fundo com motivo de dados (gráfico de tendência) */
#processo { position: relative; overflow: hidden; }
.proc-bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: .65;
  mask-image: linear-gradient(180deg, transparent, #000 25%, #000 80%, transparent);
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 25%, #000 80%, transparent);
}
.proc-bg svg { width: 100%; height: 100%; display: block; }
#processo > .container { position: relative; z-index: 1; }

/* stack */
.stack-grid { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.chip {
  font-family: var(--font-head); font-size: 15px; font-weight: 500;
  padding: 12px 24px; border-radius: 999px;
  background: var(--bg-card); border: 1px solid var(--line);
  transition: transform .25s var(--ease), border-color .25s, color .25s;
}
.chip:hover { transform: translateY(-3px); border-color: var(--red); color: var(--red-soft); }

/* steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; position: relative;
  transition: transform .35s var(--ease), border-color .35s;
}
.step:hover { transform: translateY(-5px); border-color: rgba(200, 16, 16, .35); }
.step-num {
  font-family: var(--font-head); font-size: 2.6rem; font-weight: 700;
  background: linear-gradient(120deg, var(--red-soft), var(--red-deep));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  display: block; margin-bottom: 12px; line-height: 1;
}
.step h3 { font-family: var(--font-head); font-size: 1.12rem; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 14.5px; }

/* contact */
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.contact-list { list-style: none; margin-top: 30px; display: grid; gap: 16px; }
.contact-list li { display: flex; align-items: center; gap: 14px; }
.contact-list a { color: var(--text); transition: color .25s; }
.contact-list a:hover { color: var(--red-soft); }
.ci {
  width: 42px; height: 42px; border-radius: 11px; flex-shrink: 0;
  display: grid; place-items: center; font-family: var(--font-head); font-weight: 700;
  background: linear-gradient(135deg, rgba(200, 16, 16, .16), rgba(168, 8, 8, .08));
  border: 1px solid rgba(200, 16, 16, .3); color: var(--red-soft);
}
.ci svg { width: 20px; height: 20px; fill: currentColor; }
.contact-form {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 34px;
}
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13.5px; color: var(--muted); margin-bottom: 8px; font-weight: 500; }
.field input, .field textarea {
  width: 100%; background: #0a0a0d; border: 1px solid var(--line);
  border-radius: 11px; padding: 13px 15px; color: var(--text);
  font-family: var(--font-body); font-size: 15px; resize: vertical;
  transition: border-color .25s, box-shadow .25s;
}
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(200, 16, 16, .15);
}
.form-note { margin-top: 14px; font-size: 14px; min-height: 20px; color: var(--red-soft); }

/* footer */
.footer { border-top: 1px solid var(--line); padding: 50px 0; background: var(--bg-2); }
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center; }
.footer .copy { font-size: 13.5px; color: var(--muted); }

/* WhatsApp flutuante */
.wa-float {
  position: fixed; bottom: 26px; right: 26px; z-index: 901;
  width: 56px; height: 56px; border-radius: 50%;
  display: grid; place-items: center;
  background: #25d366; color: #fff;
  box-shadow: 0 12px 28px -8px rgba(37, 211, 102, .6);
  transition: transform .25s var(--ease), box-shadow .25s;
  animation: waPulse 2.6s ease-out infinite;
}
.wa-float svg { width: 32px; height: 32px; fill: #fff; }
.wa-float:hover { transform: translateY(-3px) scale(1.05); box-shadow: 0 16px 34px -8px rgba(37, 211, 102, .8); }
@keyframes waPulse {
  0% { box-shadow: 0 12px 28px -8px rgba(37, 211, 102, .6), 0 0 0 0 rgba(37, 211, 102, .45); }
  70% { box-shadow: 0 12px 28px -8px rgba(37, 211, 102, .6), 0 0 0 16px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 12px 28px -8px rgba(37, 211, 102, .6), 0 0 0 0 rgba(37, 211, 102, 0); }
}

/* to top — empilhado acima do WhatsApp */
.to-top {
  position: fixed; bottom: 92px; right: 26px; z-index: 900;
  width: 46px; height: 46px; border-radius: 50%;
  display: grid; place-items: center; font-size: 18px;
  background: var(--red); color: #fff;
  box-shadow: 0 10px 26px -8px rgba(200, 16, 16, .7);
  opacity: 0; visibility: hidden; transform: translateY(14px);
  transition: opacity .3s, visibility .3s, transform .3s var(--ease);
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { transform: translateY(-3px); }

/* reveal animation */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .nav-links {
    position: fixed; top: 72px; right: 0;
    flex-direction: column; align-items: flex-start; gap: 4px;
    width: min(78vw, 320px); height: calc(100vh - 72px);
    background: rgba(8, 8, 9, .97); backdrop-filter: blur(16px);
    padding: 28px; border-left: 1px solid var(--line);
    transform: translateX(105%); transition: transform .4s var(--ease);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { width: 100%; padding: 12px 0; font-size: 17px; }
  .nav-cta { margin-top: 10px; }
  .nav-toggle { display: flex; }

  .grid-2, .contact-wrap { grid-template-columns: 1fr; gap: 40px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .section { padding: 80px 0; }
  .cards, .steps { grid-template-columns: 1fr; }
  .hero-stats { gap: 28px; }
  .hero-stats strong { font-size: 1.7rem; }
}

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