/* =========================================================
   Neurai — estilos base
   Paleta extraída del logo: azul profundo, azul medio, celeste.
   ========================================================= */

:root {
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F8FC;
  --color-ink: #0B1220;
  --color-ink-soft: #4B5768;
  --color-primary: #0047FA;
  --color-primary-mid: #1478FA;
  --color-accent: #32C8F0;
  --color-border: #E2E8F0;
  --color-border-strong: #C9D4E3;

  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;

  --max-width: 1120px;
  --radius: 10px;

  --transition: 180ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--color-ink);
}

h1 { font-size: clamp(2.1rem, 4vw, 3.1rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); }
h3 { font-size: 1.15rem; }

p {
  margin: 0 0 1em;
  color: var(--color-ink-soft);
  max-width: 62ch;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 16px;
  border-radius: 6px;
  z-index: 1000;
}
.skip-link:focus {
  left: 16px;
  top: 16px;
}

/* Foco visible accesible en toda la web */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---------- Botones ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 22px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: #0038c9;
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border-strong);
}
.btn-ghost:hover {
  border-color: var(--color-primary);
}

.btn-text {
  background: transparent;
  color: var(--color-ink);
  padding: 12px 8px;
}
.btn-text:hover {
  color: var(--color-primary);
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(150%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
}

.brand-mark {
  width: 32px;
  height: 32px;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--color-ink);
}

.main-nav ul {
  display: flex;
  gap: 28px;
}

.main-nav a {
  color: var(--color-ink);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
}
.main-nav a:hover {
  color: var(--color-primary);
}

.header-cta {
  padding: 10px 18px;
  font-size: 0.9rem;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
}

.mobile-nav {
  display: none;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}
.mobile-nav ul {
  padding: 12px 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.mobile-nav a {
  color: var(--color-ink);
  font-weight: 500;
}

.mobile-nav.is-open {
  display: block;
}

@media (max-width: 860px) {
  .main-nav,
  .header-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
}

/* ---------- Hero ---------- */

.hero {
  padding: 72px 0 88px;
  background: linear-gradient(180deg, #FFFFFF 0%, var(--color-bg-alt) 100%);
}

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

.hero-lead {
  font-size: 1.1rem;
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.hero-visual svg {
  width: 100%;
  height: auto;
}

.grid-lines line {
  stroke: var(--color-border);
  stroke-width: 1;
}

#flow-path {
  fill: none;
  stroke: url(#lineGrad);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 620;
  stroke-dashoffset: 620;
  animation: draw-path 1.6s ease-out forwards;
  animation-delay: 0.2s;
}

.node {
  fill: var(--color-primary-mid);
  opacity: 0;
  animation: pop-in 0.4s ease-out forwards;
}
.node:nth-of-type(2) { animation-delay: 0.55s; }
.node:nth-of-type(3) { animation-delay: 0.95s; }
.node-ring {
  fill: #fff;
  stroke: var(--color-accent);
  stroke-width: 5;
  animation-delay: 1.5s;
}
.node:first-of-type {
  fill: var(--color-accent);
  animation-delay: 0.15s;
}

@keyframes draw-path {
  to { stroke-dashoffset: 0; }
}
@keyframes pop-in {
  to { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  #flow-path {
    stroke-dashoffset: 0;
    animation: none;
  }
  .node {
    opacity: 1;
    animation: none;
  }
}

@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .hero-visual {
    order: -1;
    max-width: 360px;
    margin: 0 auto;
  }
}

/* ---------- Secciones genéricas ---------- */

.section {
  padding: 88px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-head {
  max-width: 640px;
  margin-bottom: 44px;
}

.section-head p {
  font-size: 1.05rem;
}

/* ---------- Servicios ---------- */

.service-list {
  display: flex;
  flex-direction: column;
}

.service-row {
  padding: 26px 0;
  border-top: 1px solid var(--color-border);
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 24px;
  transition: border-color var(--transition);
}
.service-list .service-row:last-child {
  border-bottom: 1px solid var(--color-border);
}

.service-row h3 {
  margin: 0;
}

.service-row p {
  margin: 0;
  max-width: 60ch;
}

.service-row:hover {
  border-top-color: var(--color-primary-mid);
}

@media (max-width: 700px) {
  .service-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}

/* ---------- Proceso ---------- */

.process-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.process-step {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 18px;
  border-top: 2px solid var(--color-accent);
}

.step-num {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-primary-mid);
  font-size: 0.95rem;
}

.process-step h3 {
  margin-top: 4px;
}

.process-step p {
  font-size: 0.95rem;
}

@media (max-width: 860px) {
  .process-list {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 560px) {
  .process-list {
    grid-template-columns: 1fr;
  }
}

/* ---------- Casos ---------- */

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color var(--transition);
}
.case-card:hover {
  border-color: var(--color-primary-mid);
}

.case-tag {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.case-card p:last-child {
  margin-bottom: 0;
}

@media (max-width: 860px) {
  .case-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Nosotros ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: start;
}

.about-values p {
  padding: 16px 0;
  border-top: 1px solid var(--color-border-strong);
  font-size: 0.95rem;
}
.about-values p:last-child {
  border-bottom: 1px solid var(--color-border-strong);
}
.about-values strong {
  color: var(--color-ink);
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-display);
  font-weight: 600;
}

@media (max-width: 860px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Contacto ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}

.contact-details {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.contact-details dt {
  font-size: 0.82rem;
  color: var(--color-ink-soft);
  font-weight: 500;
}
.contact-details dd {
  margin: 0;
  font-weight: 600;
}

.contact-form {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-field label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-ink);
}

.form-field input,
.form-field textarea {
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 11px 13px;
  border: 1px solid var(--color-border-strong);
  border-radius: 8px;
  background: #fff;
  color: var(--color-ink);
  resize: vertical;
}

.form-field input:invalid:not(:placeholder-shown),
.form-field textarea:invalid:not(:placeholder-shown) {
  border-color: #D64545;
}

/* Campo señuelo anti-spam, oculto visualmente pero accesible a bots automatizados */
.hp-field {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.form-submit {
  align-self: flex-start;
  margin-top: 6px;
}

.form-status {
  font-size: 0.9rem;
  margin: 0;
  min-height: 1.2em;
}
.form-status[data-state="error"] {
  color: #C22B2B;
}
.form-status[data-state="success"] {
  color: #14804A;
}

@media (max-width: 860px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
}

.footer-copy {
  margin: 0;
  font-size: 0.85rem;
}