/* =========================================================
   CudaSystems — sistema de diseño
   Paleta: slate profundo + señal cian, papel frío de fondo
   Tipografía: Space Grotesk (títulos) + Source Serif 4 (cuerpo)
   ========================================================= */

:root {
  --slate-950: #0E1620;
  --slate-900: #131F2B;
  --slate-800: #1B2A38;
  --slate-700: #2B3E4E;
  --signal: #3FBFAD;
  --signal-dim: #2C9284;
  --amber: #D99A3C;
  --paper: #EFF2F1;
  --paper-2: #E4E9E7;
  --ink: #101820;
  --ink-muted: #56636D;
  --line: #D2D9D6;
  --line-dark: #2B3E4E;

  --font-head: 'Space Grotesk', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Source Serif 4', Georgia, 'Times New Roman', serif;

  --maxw: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em 0;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); }
h3 { font-size: 1.3rem; }

p { margin: 0 0 1.1em 0; max-width: 62ch; }
a { color: inherit; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- Header ---------- */
header.site {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(239, 242, 241, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  max-width: var(--maxw);
  margin: 0 auto;
}

.brand {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand .dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--signal);
  display: inline-block;
}

.nav-links {
  display: flex;
  gap: 30px;
  list-style: none;
  margin: 0; padding: 0;
  font-family: var(--font-head);
  font-size: 0.95rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--ink-muted);
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--ink);
  border-color: var(--signal);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 10px;
  font-family: var(--font-head);
  cursor: pointer;
}

@media (max-width: 760px) {
  .nav-links {
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    padding: 20px 32px;
    gap: 16px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
}

/* ---------- Hero ---------- */
.hero {
  background: var(--slate-950);
  color: var(--paper);
  padding: 96px 0 84px;
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

@media (max-width: 860px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-diagram { order: -1; }
}

.hero h1 { color: #fff; }
.hero .lede {
  color: #C7D1D6;
  font-size: 1.18rem;
  max-width: 46ch;
}

.hero-meta {
  display: flex;
  gap: 28px;
  margin-top: 36px;
  flex-wrap: wrap;
  font-family: var(--font-head);
}
.hero-meta div { font-size: 0.9rem; color: #9FB0B7; }
.hero-meta strong { display: block; color: #fff; font-size: 1.5rem; font-weight: 700; }

.cta-row { display: flex; gap: 16px; margin-top: 32px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.98rem;
  padding: 13px 26px;
  border-radius: 4px;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--signal);
  color: #0B1116;
}
.btn-primary:hover { background: #56CFBE; }

.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: #3C4E5C;
}
.btn-ghost:hover { border-color: var(--signal); }

.hero-diagram svg { width: 100%; height: auto; display: block; }
.node { fill: var(--slate-800); stroke: #3C4E5C; }
.node-core { fill: var(--signal); stroke: none; }
.link {
  stroke: #3C4E5C;
  stroke-width: 1.4;
  fill: none;
}
.link-live {
  stroke: var(--signal);
  stroke-width: 1.6;
  fill: none;
  stroke-dasharray: 4 5;
  animation: dash 14s linear infinite;
}
@keyframes dash { to { stroke-dashoffset: -200; } }

/* ---------- Sections ---------- */
section { padding: 84px 0; }
section.alt { background: var(--paper-2); }
section.dark { background: var(--slate-950); color: var(--paper); }
section.dark p { color: #B9C4C9; }
section.dark h2 { color: #fff; }

.section-head { max-width: 60ch; margin-bottom: 48px; }
.section-head .kicker {
  font-family: var(--font-head);
  font-size: 0.85rem;
  color: var(--signal-dim);
  margin-bottom: 10px;
  font-weight: 600;
}
section.dark .section-head .kicker { color: var(--signal); }

/* ---------- Service cards ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
@media (max-width: 820px) { .services-grid { grid-template-columns: 1fr; } }

.service-card {
  background: var(--slate-950);
  padding: 34px 30px;
}
.service-card .num {
  font-family: var(--font-head);
  color: var(--signal);
  font-size: 0.85rem;
  margin-bottom: 18px;
}
.service-card h3 { color: #fff; }
.service-card p { color: #AEBBC1; font-size: 0.98rem; margin-bottom: 0; }

/* ---------- Process list ---------- */
.process {
  border-top: 1px solid var(--line);
}
.process-item {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}
.process-item .step {
  font-family: var(--font-head);
  color: var(--ink-muted);
  font-size: 0.95rem;
}
.process-item h3 { margin-bottom: 6px; }
.process-item p { margin-bottom: 0; color: var(--ink-muted); }

/* ---------- Two-col text ---------- */
.two-col {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
}
@media (max-width: 820px) { .two-col { grid-template-columns: 1fr; } }

.tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.tag {
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 6px 12px;
  font-family: var(--font-head);
  font-size: 0.82rem;
  color: var(--ink-muted);
}

/* ---------- Contact form ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
@media (max-width: 820px) { .contact-grid { grid-template-columns: 1fr; } }

form.contact-form { display: flex; flex-direction: column; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label {
  font-family: var(--font-head);
  font-size: 0.85rem;
  color: var(--ink-muted);
}
.field input, .field textarea, .field select {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
  color: var(--ink);
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: 2px solid var(--signal);
  outline-offset: 1px;
}
.field textarea { resize: vertical; min-height: 140px; }

.form-status {
  font-family: var(--font-head);
  font-size: 0.9rem;
  padding: 12px 14px;
  border-radius: 4px;
  display: none;
}
.form-status.show { display: block; }
.form-status.ok { background: #DCF3EE; color: #1E6E60; }
.form-status.err { background: #F6DCDC; color: #8A2A2A; }

.contact-info dl {
  margin: 28px 0 0;
}
.contact-info dt {
  font-family: var(--font-head);
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-top: 18px;
}
.contact-info dd { margin: 4px 0 0; font-size: 1.05rem; }

/* ---------- Blog ---------- */
.post-list { border-top: 1px solid var(--line); }
.post-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}
@media (max-width: 600px) { .post-item { grid-template-columns: 1fr; } }
.post-item time {
  font-family: var(--font-head);
  font-size: 0.85rem;
  color: var(--ink-muted);
}
.post-item h3 { margin-bottom: 8px; }
.post-item p { margin-bottom: 0; color: var(--ink-muted); }

.empty-state {
  border: 1px dashed var(--line);
  border-radius: 6px;
  padding: 40px;
  text-align: center;
  color: var(--ink-muted);
}

/* ---------- Footer ---------- */
footer.site {
  background: var(--slate-950);
  color: #8C9AA1;
  padding: 48px 0 32px;
  font-size: 0.92rem;
}
footer.site .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
footer.site a { color: #C7D1D6; text-decoration: none; }
footer.site a:hover { color: var(--signal); }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--signal);
  color: #0B1116;
  padding: 10px 16px;
  z-index: 100;
}
.skip-link:focus { left: 12px; top: 12px; }

*:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}