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

:root {
  --navy:      #0d1b2e;
  --navy-mid:  #122040;
  --navy-light:#1c3057;
  --blue:      #2f6fbd;
  --blue-light:#4a8fd4;
  --red:       #c94f2c;
  --red-light: #e06840;
  --text:      #e8edf3;
  --muted:     #8fa3bd;
  --border:    #1e3352;
  --code-bg:   #0b1622;
  --white:     #ffffff;
}

body {
  font-family: "Roboto", sans-serif;
  background: var(--white);
  color: #1a2a4a;
  line-height: 1.6;
}

h1, h2, h3, .section-title, .hero h1, .cta h2 {
  font-family: "Inter", sans-serif;
}

/* ── HERO ─────────────────────────────────────────────────── */
.hero {
  position: relative;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, #1a3a6e 0%, var(--navy) 70%);
  color: var(--text);
  text-align: center;
  padding: 4.5rem 1.5rem 3.5rem;
  overflow: hidden;
}

/* glow blob detrás del título */
.hero::before {
  content: '';
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(47, 111, 189, 0.35) 0%, transparent 70%);
  pointer-events: none;
  filter: blur(20px);
}

.hero-badge {
  position: relative;
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--muted);
  margin-bottom: 2rem;
}

.hero h1 {
  position: relative;
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--white);
  max-width: 760px;
  margin: 0 auto 1.25rem;
  /* texto con sutil luminosidad */
  text-shadow: 0 0 60px rgba(74, 143, 212, 0.4);
}

.hero p {
  position: relative;
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto 2rem;
}

.install-box {
  display: inline-block;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .75rem 1.5rem;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: .95rem;
  color: #7dd3fc;
  margin-bottom: 2.5rem;
  cursor: pointer;
  position: relative;
  transition: border-color .2s, box-shadow .2s;
}
.install-box:hover {
  border-color: var(--blue-light);
  box-shadow: 0 0 18px rgba(74, 143, 212, 0.25);
}
.install-box .copy-hint {
  position: absolute;
  top: -28px; left: 50%; transform: translateX(-50%);
  background: var(--blue);
  color: #fff;
  font-family: sans-serif;
  font-size: .72rem;
  padding: 2px 8px;
  border-radius: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s;
  white-space: nowrap;
}
.install-box.copied .copy-hint { opacity: 1; }

.hero-nav {
  position: relative;
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}
.hero-nav a {
  color: var(--blue-light);
  text-decoration: none;
  font-size: .95rem;
  transition: color .2s;
}
.hero-nav a:hover { color: var(--white); }

/* ── SECTIONS ─────────────────────────────────────────────── */
section { padding: 5rem 1.5rem; }
.container { max-width: 960px; margin: 0 auto; }

.section-label {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: .75rem;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 800;
  color: var(--blue);
  margin-bottom: .75rem;
}

.section-sub {
  color: #4a5568;
  max-width: 640px;
  margin-bottom: 2.5rem;
}

/* ── EL PROBLEMA ──────────────────────────────────────────── */
.problema { background: #f8fafc; }

.problems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1px;
  background: #dde3ec;
  border: 1px solid #dde3ec;
  border-radius: 8px;
  overflow: hidden;
}

.problem-card {
  background: #fff;
  padding: 1.5rem 1.25rem;
}

.problem-card h3 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--red);
  margin-bottom: .5rem;
}

.problem-card p {
  font-size: .82rem;
  color: #4a5568;
  line-height: 1.5;
}

/* ── COMO FUNCIONA ────────────────────────────────────────── */
.como { background: var(--white); }

/* ── PIPELINE ANIMADO ─────────────────────────────────────── */
.pipeline {
  display: flex;
  align-items: center;
  overflow-x: auto;
  background: var(--navy);
  border-radius: 8px;
  margin-bottom: 2rem;
  padding: 1rem 1.25rem;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
}

.pipe-step {
  display: flex;
  align-items: center;
  white-space: nowrap;
}

.pipe-label {
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: .78rem;
  padding: .45rem .85rem;
  border-radius: 5px;
  color: var(--muted);
  background: var(--navy-light);
  border: 1px solid transparent;
  transition: color .3s, border-color .3s, box-shadow .3s;
}

/* estado activo del pipeline — aplicado via JS */
.pipe-label.pipe-active {
  color: #fff;
  border-color: var(--blue-light);
  box-shadow: 0 0 14px rgba(74, 143, 212, 0.45);
}

.pipe-label.highlight {
  background: var(--blue);
  color: #fff;
  font-weight: 700;
}
.pipe-label.highlight.pipe-active {
  box-shadow: 0 0 20px rgba(47, 111, 189, 0.7);
  border-color: #7dd3fc;
}

.pipe-arrow {
  color: var(--border);
  padding: 0 .5rem;
  font-size: 1rem;
  transition: color .3s;
}
.pipe-arrow.pipe-arrow-active {
  color: var(--blue-light);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  border: 1px solid #dde3ec;
  border-radius: 8px;
  padding: 1.5rem;
}

.feature-card h3 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--blue);
  margin-bottom: .5rem;
}

.feature-card p {
  font-size: .83rem;
  color: #4a5568;
  line-height: 1.55;
}

/* ── CALL SITE ────────────────────────────────────────────── */
.callsite { background: #f8fafc; }

.code-block {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.code-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.code-tab {
  padding: .6rem 1.25rem;
  font-size: .78rem;
  color: var(--muted);
  cursor: pointer;
  border: none;
  background: none;
  white-space: nowrap;
  transition: color .2s, background .2s;
}
.code-tab.active {
  color: #7dd3fc;
  background: var(--navy-mid);
  border-bottom: 2px solid var(--blue-light);
}
.code-tab:hover:not(.active) { color: var(--text); }

/* ── CODE CON LINE NUMBERS ────────────────────────────────── */
.code-panels {
  display: flex;
  padding: 1.25rem 0;
}

/* gutter de números de línea */
.line-numbers {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding: 0 .75rem 0 1rem;
  min-width: 2.5rem;
  border-right: 1px solid var(--border);
  user-select: none;
  pointer-events: none;
}

.line-numbers span {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: .78rem;
  line-height: 1.7;
  color: #2e4a68;
}

.code-panel { display: none; flex: 1; padding: 0 1.25rem; }
.code-panel.active { display: block; }

pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: .82rem;
  line-height: 1.7;
  white-space: pre;
  overflow-x: auto;
  color: #c9d8e8;
}

.kw  { color: var(--muted); }
.cls { color: #f87171; font-weight: 700; }
.met { color: #f87171; }
.str { color: #86efac; }
.cmt { color: #4a6680; font-style: italic; }
.var { color: #c9d8e8; }
.num { color: #fbbf24; }

/* ── DISEÑO EN CAPAS ──────────────────────────────────────── */
.capas { background: var(--white); }

.layers-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #dde3ec;
  font-size: .9rem;
}

.layers-table thead {
  background: var(--navy);
  color: var(--muted);
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.layers-table th { padding: .75rem 1.25rem; text-align: left; }

.layers-table tbody tr:nth-child(odd)  { background: #fff; }
.layers-table tbody tr:nth-child(even) { background: #f0f5fb; }

.layers-table td { padding: 1rem 1.25rem; vertical-align: top; }

.layer-name {
  font-family: monospace;
  font-weight: 700;
  color: var(--blue);
  font-size: .9rem;
}

.layer-desc { color: #4a5568; font-size: .85rem; line-height: 1.5; }
.layer-scope { color: var(--muted); font-size: .82rem; }

/* ── CTA FINAL ────────────────────────────────────────────── */
.cta {
  background: var(--navy);
  color: var(--text);
  text-align: center;
  padding: 4rem 1.5rem;
}

.cta h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: .75rem;
}

.cta p {
  color: var(--muted);
  margin-bottom: 2rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: .65rem 1.5rem;
  border-radius: 6px;
  font-size: .9rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity .2s, transform .1s;
}
.btn:hover { opacity: .85; transform: translateY(-1px); }

.btn-primary { background: var(--blue); color: #fff; }
.btn-ghost   { border: 1px solid var(--border); color: var(--muted); }

/* ── FOOTER ───────────────────────────────────────────────── */
footer {
  background: var(--code-bg);
  color: var(--muted);
  text-align: center;
  padding: 1.5rem;
  font-size: .78rem;
}
footer a { color: var(--blue-light); text-decoration: none; }

/* ── RESPONSIVE ───────────────────────────────────────────── */
@media (max-width: 600px) {
  .hero-nav { gap: 1.25rem; }
  .layers-table thead { display: none; }
  .layers-table, .layers-table tbody, .layers-table tr, .layers-table td {
    display: block; width: 100%;
  }
  .layers-table td { padding: .75rem 1rem; }
  .line-numbers { display: none; }
}

/* ── LANG SWITCHER ────────────────────────────────────────── */
.lang-switcher {
  position: fixed;
  top: 1rem;
  right: 1.25rem;
  z-index: 999;
  display: flex;
  gap: .35rem;
  background: rgba(13,27,46,.75);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .3rem .4rem;
}
.lang-switcher a {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .06em;
  padding: .2rem .55rem;
  border-radius: 4px;
  text-decoration: none;
  color: var(--muted);
  transition: background .2s, color .2s;
}
.lang-switcher a.active {
  background: var(--blue);
  color: #fff;
}
.lang-switcher a:hover:not(.active) { color: var(--text); }

/* ── CONTACTO ─────────────────────────────────────────────── */
.contacto { background: #f8fafc; }

.contact-form {
  max-width: 640px;
}

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

@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
}

.form-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 1rem;
}

.form-group label {
  font-size: .8rem;
  font-weight: 600;
  color: #2d3748;
  margin-bottom: .4rem;
  letter-spacing: .03em;
}

.form-group input,
.form-group textarea {
  padding: .65rem .9rem;
  border: 1px solid #dde3ec;
  border-radius: 6px;
  font-family: "Roboto", sans-serif;
  font-size: .9rem;
  color: #1a2a4a;
  background: #fff;
  transition: border-color .2s, box-shadow .2s;
  outline: none;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--blue-light);
  box-shadow: 0 0 0 3px rgba(74,143,212,.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #a0aec0;
}

#submitBtn {
  margin-top: .5rem;
  padding: .75rem 2rem;
  cursor: pointer;
  border: none;
}

#submitBtn:disabled {
  opacity: .6;
  cursor: not-allowed;
  transform: none;
}

.form-status {
  margin-top: .75rem;
  font-size: .85rem;
  min-height: 1.2em;
}

.form-status.success { color: #38a169; }
.form-status.error   { color: #e53e3e; }