/* ============================================================
   ML TECH SOLUTIONS — Sistema de Design
   Paleta: Ink / Surface / Azure / Signal / Violet
   Tipografia: Space Grotesk (display) + IBM Plex Sans (corpo) + IBM Plex Mono (dados/labels)
   ============================================================ */

:root {
  /* Cor — base */
  --ink: #090D16;
  --ink-2: #0C111C;
  --surface: #111828;
  --surface-2: #161F33;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);

  /* Cor — acento */
  --azure: #2E6BE6;
  --azure-light: #6CA0FF;
  --azure-dim: #1B3F8C;
  --signal: #22D3EE;
  --violet: #7C6CF6;
  --success: #34D399;

  /* Texto */
  --text: #EDF1F7;
  --text-muted: #939CB3;
  --text-faint: #5C6478;

  /* Tipografia */
  --font-display: 'Space Grotesk', 'IBM Plex Sans', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* Forma */
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;

  /* Movimento */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--ink);
}

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

h1, h2, h3, h4, .font-display {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}

.font-mono { font-family: var(--font-mono); letter-spacing: 0.02em; }

::selection { background: var(--azure); color: #fff; }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--ink); }
::-webkit-scrollbar-thumb { background: var(--surface-2); border-radius: 8px; border: 2px solid var(--ink); }

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--azure-light);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Texturas de fundo ---------- */

.bg-mesh {
  position: relative;
  isolation: isolate;
}
.bg-mesh::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60% 50% at 85% -10%, rgba(46, 107, 230, 0.28), transparent 60%),
    radial-gradient(45% 40% at 10% 10%, rgba(124, 108, 246, 0.16), transparent 65%),
    radial-gradient(35% 35% at 50% 100%, rgba(34, 211, 238, 0.08), transparent 70%);
}

.bg-grid {
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, black 40%, transparent 90%);
}

.bg-noise {
  position: relative;
}
.bg-noise::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- Navegação ---------- */

.nav-blur {
  background: rgba(9, 13, 22, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
}

.nav-link {
  position: relative;
  color: var(--text-muted);
  transition: color 0.2s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--azure-light);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav-link:hover { color: var(--text); }
.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); }
.nav-link.active { color: var(--text); }

/* ---------- Botões ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 500;
  font-size: 0.95rem;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--azure), #4C86F0 55%, var(--signal));
  color: #06111F;
  font-weight: 600;
  box-shadow: 0 8px 24px -8px rgba(46, 107, 230, 0.55);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -8px rgba(46, 107, 230, 0.7); }
.btn-ghost {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.25); transform: translateY(-2px); }

/* ---------- Cartões ---------- */

.card {
  background: linear-gradient(180deg, var(--surface), var(--surface) 60%, var(--surface-2));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(108, 160, 255, 0.35);
  box-shadow: 0 20px 40px -20px rgba(0,0,0,0.6), 0 0 0 1px rgba(108,160,255,0.08) inset;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--azure-light);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 3px rgba(34,211,238,0.15);
}

.chip {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--text-muted);
  background: rgba(255,255,255,0.02);
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}
.chip:hover { border-color: var(--azure-light); color: var(--text); }

.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 3px rgba(52,211,153,0.18);
  animation: breathe 2.4s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

/* ---------- Elemento assinatura: Topologia viva ---------- */

.topology-line {
  stroke: url(#lineGradient);
  stroke-width: 1.4;
  fill: none;
  opacity: 0.5;
}
.topology-flow {
  stroke: var(--signal);
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-dasharray: 6 240;
  animation: flow 5s linear infinite;
  filter: drop-shadow(0 0 4px rgba(34,211,238,0.8));
}
.topology-flow.delay1 { animation-delay: -1.2s; }
.topology-flow.delay2 { animation-delay: -2.6s; }
.topology-flow.delay3 { animation-delay: -3.8s; }
.topology-flow.delay4 { animation-delay: -0.6s; }

@keyframes flow {
  to { stroke-dashoffset: -246; }
}

.topology-node {
  fill: var(--surface-2);
  stroke: var(--border-strong);
  stroke-width: 1.2;
}
.topology-node-core {
  fill: var(--azure);
  animation: pulse-node 3s ease-in-out infinite;
}
@keyframes pulse-node {
  0%, 100% { r: 5; opacity: 1; }
  50% { r: 6.2; opacity: 0.85; }
}
.topology-ring {
  fill: none;
  stroke: rgba(108,160,255,0.25);
  stroke-width: 1;
  animation: spin 40s linear infinite;
  transform-origin: center;
}
.topology-ring.reverse { animation-direction: reverse; stroke: rgba(34,211,238,0.18); }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Reveal ao scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}
.reveal-stagger > * { transition-delay: calc(var(--i, 0) * 90ms); }

/* ---------- Acordeão FAQ ---------- */

.accordion-item { border-bottom: 1px solid var(--border); }
.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  text-align: left;
  padding: 1.4rem 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--text);
}
.accordion-icon { flex-shrink: 0; transition: transform 0.35s var(--ease); color: var(--azure-light); }
.accordion-item.open .accordion-icon { transform: rotate(45deg); }
.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease);
}
.accordion-panel-inner { padding-bottom: 1.5rem; color: var(--text-muted); line-height: 1.7; }

/* ---------- Formulários ---------- */

.field label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.5rem;
}
.field input,
.field textarea,
.field select {
  width: 100%;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  color: var(--text);
  font-family: var(--font-body);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-faint); }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--azure-light);
  background: rgba(255,255,255,0.05);
}
.field-error { color: #F87171; font-size: 0.82rem; margin-top: 0.4rem; display: none; font-family: var(--font-mono); }
.field.invalid input, .field.invalid textarea { border-color: #F87171; }
.field.invalid .field-error { display: block; }

/* ---------- Rodapé ---------- */

.footer-link { color: var(--text-muted); transition: color 0.2s var(--ease); }
.footer-link:hover { color: var(--text); }

/* ---------- Utilitários ---------- */

.text-gradient {
  background: linear-gradient(90deg, var(--text) 0%, var(--azure-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.divider-fade {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}