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

:root {
  --bg:        #09090f;
  --bg-card:   #111118;
  --bg-card-h: #16161f;
  --border:    #1e1e2e;
  --text:      #e8e8f0;
  --muted:     #7c7c99;
  --accent:    #4f8ef7;
  --accent-glow: rgba(79, 142, 247, 0.15);
  --radius:    10px;
  --max-w:     1100px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
}

/* ── Layout ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Header ── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(9, 9, 15, 0.85);
  backdrop-filter: blur(12px);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
}

nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

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

.btn-nav {
  color: var(--accent) !important;
  border: 1px solid var(--accent);
  padding: 0.35rem 1rem;
  border-radius: var(--radius);
  transition: background 0.2s, color 0.2s !important;
}

.btn-nav:hover {
  background: var(--accent) !important;
  color: #fff !important;
}

/* ── Hero ── */
.hero {
  padding: 7rem 0 6rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(79, 142, 247, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  color: #fff;
}

.accent { color: var(--accent); }

.hero-sub {
  max-width: 580px;
  margin: 0 auto 2.5rem;
  color: var(--muted);
  font-size: 1.1rem;
}

/* ── Buttons ── */
.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.2s;
}

.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

/* ── Services ── */
.servicios {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  color: #fff;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: background 0.2s, border-color 0.2s;
}

.card:hover {
  background: var(--bg-card-h);
  border-color: var(--accent);
}

.card-icon {
  font-size: 1.4rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: #fff;
}

.card p {
  color: var(--muted);
  font-size: 0.93rem;
}

/* ── Contact ── */
.contacto {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
}

.contact-sub {
  color: var(--muted);
  text-align: center;
  margin-top: -2rem;
  margin-bottom: 2.5rem;
}

.form {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

label {
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.03em;
}

input, textarea {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 0.7rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  resize: vertical;
}

input::placeholder, textarea::placeholder { color: #40405a; }

input:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer p {
  color: var(--muted);
  font-size: 0.85rem;
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
  nav { gap: 1rem; }
  .hero { padding: 4rem 0; }
}