/* ---------- Tokens ---------- */
:root {
  --bg: #0A0E14;
  --bg-alt: #0F1620;
  --text: #E8ECF1;
  --text-muted: #7C8A9E;
  --accent: #3DDBD9;
  --accent-2: #5B6EF5;
  --line: #1D2733;
  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", sans-serif;
  --wrap: 1120px;
}

/* Claro forzado manualmente vía selector (theme.js setea data-theme="light") */
:root[data-theme="light"] {
  --bg: #FFFFFF;
  --bg-alt: #F3F5F8;
  --text: #10151C;
  --text-muted: #57657A;
  --line: #DCE2EA;
}

/* Claro automático por preferencia del sistema, solo si no hay override manual a oscuro */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #FFFFFF;
    --bg-alt: #F3F5F8;
    --text: #10151C;
    --text-muted: #57657A;
    --line: #DCE2EA;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 28px;
}

a { color: inherit; }

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

h2 {
  font-size: clamp(1.6rem, 2.4vw, 2.2rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

p { color: var(--text-muted); margin: 0; }

/* ---------- Focus ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.92rem;
}

.nav a {
  text-decoration: none;
  color: var(--text-muted);
  transition: color 0.15s ease;
}

.nav a:hover { color: var(--text); }

.nav-cta {
  color: var(--bg) !important;
  background: var(--accent);
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 500;
}

.nav-cta:hover { color: var(--bg) !important; opacity: 0.9; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--font-body);
}

.btn-primary {
  background: var(--accent);
  color: #041012;
}

.btn-primary:hover { background: #57e3e1; }

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}

.btn-ghost:hover { border-color: var(--accent); }

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 88px;
  border-bottom: 1px solid var(--line);
}

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

.hero-copy h1 {
  font-size: clamp(2.1rem, 4.2vw, 3.4rem);
  letter-spacing: -0.02em;
}

.hero-lede {
  max-width: 56ch;
  margin-top: 24px;
  font-size: 1.05rem;
  color: var(--text-muted);
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 36px;
  flex-wrap: wrap;
}

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

/* ---------- Sections ---------- */
.section {
  padding: 84px 0;
  border-bottom: 1px solid var(--line);
}

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

.section-lede {
  max-width: 62ch;
  margin-top: 14px;
  font-size: 1.02rem;
}

/* ---------- Services / Projects grids ---------- */
.services, .projects {
  display: grid;
  gap: 1px;
  background: var(--line);
  margin-top: 44px;
  border: 1px solid var(--line);
}

.services { grid-template-columns: repeat(3, 1fr); }
.projects { grid-template-columns: repeat(2, 1fr); }

.service, .project {
  background: var(--bg);
  padding: 32px;
}

.section-alt .service, .section-alt .project { background: var(--bg-alt); }

.service p, .project p { font-size: 0.95rem; }

/* ---------- IA section ---------- */
.ia-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
}

.ia-points {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.ia-point {
  padding-left: 20px;
  border-left: 2px solid var(--accent-2);
}

.ia-point p { font-size: 0.95rem; margin-top: 6px; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 56px;
}

.contact-intro h2 { margin-bottom: 0; }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 480px;
}

.form-row { display: flex; flex-direction: column; gap: 8px; }

.form-row label {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.form-row input,
.form-row textarea {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 14px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  resize: vertical;
}

.section-alt .form-row input,
.section-alt .form-row textarea { background: var(--bg-alt); }

.form-row input:focus,
.form-row textarea:focus {
  border-color: var(--accent);
}

.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-status {
  font-size: 0.9rem;
  min-height: 1.2em;
}

.form-status[data-state="ok"] { color: var(--accent); }
.form-status[data-state="error"] { color: #f08a6c; }

/* ---------- Footer ---------- */
.site-footer {
  padding: 32px 0;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-graphic { order: -1; max-width: 260px; margin: 0 auto; }
  .services { grid-template-columns: 1fr; }
  .projects { grid-template-columns: 1fr; }
  .ia-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .nav { gap: 16px; font-size: 0.85rem; }
}

@media (max-width: 560px) {
  .nav a:not(.nav-cta) { display: none; }
  .hero { padding: 64px 0 56px; }
  .section { padding: 56px 0; }
}

/* ---------- Casos de éxito ---------- */
.case-breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 24px;
}

.case-breadcrumb:hover { color: var(--accent); }

.case-hero {
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--line);
}

.case-hero .eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.case-hero h1 { font-size: clamp(1.9rem, 3.4vw, 2.8rem); margin-bottom: 18px; }

.case-hero .case-lede {
  max-width: 760px;
  font-size: 1.05rem;
  color: var(--text-muted);
}

.case-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
  margin-top: 36px;
}

.case-stat {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 20px;
  background: var(--bg-alt);
}

.case-stat .num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
  margin-bottom: 4px;
}

.case-stat .label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.case-stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.case-stack-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px;
}

.case-stack-item h3 { margin-bottom: 6px; }

.case-stack-item .stack-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 10px;
}

.case-highlight {
  background: linear-gradient(180deg, var(--bg-alt), var(--bg));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 56px 0;
}

.case-highlight h2 { margin-bottom: 14px; }

.case-highlight .case-lede { max-width: 760px; margin-bottom: 32px; }

.case-highlight ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.case-highlight li {
  border-left: 2px solid var(--accent);
  padding-left: 16px;
}

.case-highlight li strong { display: block; color: var(--text); margin-bottom: 4px; }

.case-faq { margin-top: 8px; }

.case-faq-item {
  border-bottom: 1px solid var(--line);
  padding: 22px 0;
}

.case-faq-item:first-child { padding-top: 0; }
.case-faq-item:last-child { border-bottom: none; }

.case-faq-item h3 { font-size: 1.05rem; margin-bottom: 8px; }

.case-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.case-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px;
  text-decoration: none;
  display: block;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.case-card:hover { border-color: var(--accent); transform: translateY(-2px); }

.case-card .eyebrow {
  display: block;
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.case-card h3 { color: var(--text); margin-bottom: 10px; }

.case-card p { margin-bottom: 14px; }

.case-card .case-read-more {
  font-size: 0.9rem;
  color: var(--accent-2);
}

/* ---------- Selectores de tema e idioma ---------- */
.prefs-switcher {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: 8px;
}

.prefs-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.prefs-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  color: var(--text-muted);
  padding: 6px;
  cursor: pointer;
  transition: color 0.15s ease;
}

.prefs-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.prefs-btn svg {
  width: 15px;
  height: 15px;
  overflow: visible;
}

.prefs-btn svg,
.prefs-btn svg * {
  stroke: currentColor;
  fill: none;
}

.prefs-btn:hover { color: var(--text); }

.prefs-btn[aria-pressed="true"] { color: var(--accent); }

.lang-switcher {
  display: flex;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.lang-switcher a {
  display: inline-block;
  padding: 5px 9px;
  font-size: 0.78rem;
  text-decoration: none;
  color: var(--text-muted);
  transition: background 0.15s ease, color 0.15s ease;
}

.lang-switcher a + a { border-left: 1px solid var(--line); }

.lang-switcher a:hover { color: var(--text); }

.lang-switcher a[aria-current="true"] {
  background: var(--accent);
  color: var(--bg);
}

@media (max-width: 560px) {
  .prefs-switcher { gap: 6px; }
  .prefs-btn, .lang-switcher a { padding: 4px 7px; font-size: 0.72rem; }
}