/* ─────────────────────────────────────────────────────────────────────────
   IngeTrazo — Landing
   Sistema visual de la familia Inge[X] (espejo de ingepresupuestos.com,
   estilo elementary.io): screenshot a un lado, texto al otro, mucho aire.
   Acento de producto: Blueberry (#3689E6). El naranja queda reservado a la
   sección puente con IngePresupuestos.
   ──────────────────────────────────────────────────────────────────────── */

:root {
  --accent:      #3689E6;   /* Blueberry — acento IngeTrazo */
  --accent-dk:   #0D52BF;
  --accent-soft: #EBF4FD;
  --orange:      #F37329;   /* IngePresupuestos (sección puente) */
  --orange-dk:   #C0621A;
  --orange-soft: #FEF5EB;
  --lime-soft:   #F2F9EC;   /* sección Terreno */
  --lime:        #68B723;
  --slate-900:   #1A2434;
  --slate-700:   #273445;
  --slate-500:   #485A6C;
  --slate-300:   #667885;
  --silver-100:  #F8F9FA;
  --silver-300:  #D4D4D4;
  --white:       #FFFFFF;
  --radius:      12px;
  --radius-sm:   6px;
  --shadow:      0 2px 8px rgba(0,0,0,0.06);
  --shadow-img:  0 12px 40px rgba(0,0,0,0.10), 0 2px 8px rgba(0,0,0,0.06);
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--slate-700);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dk); }
ul { list-style: none; }
code {
  font-family: 'Fira Code', Consolas, monospace;
  font-size: 0.88em;
  background: var(--silver-100);
  padding: 2px 6px;
  border-radius: 4px;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 32px;
}
.container-narrow { max-width: 720px; }

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font: 600 15px/1 'Inter', sans-serif;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent); color: var(--white); border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-dk); border-color: var(--accent-dk); color: var(--white);
  transform: translateY(-1px); box-shadow: var(--shadow);
}
.btn-ghost {
  background: transparent; color: var(--slate-700); border-color: var(--silver-300);
}
.btn-ghost:hover {
  background: var(--accent-soft); border-color: var(--accent); color: var(--accent-dk);
}
.btn-orange {
  background: var(--orange); color: var(--white); border-color: var(--orange);
}
.btn-orange:hover {
  background: var(--orange-dk); border-color: var(--orange-dk); color: var(--white);
  transform: translateY(-1px); box-shadow: var(--shadow);
}
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-lg { padding: 16px 36px; font-size: 16px; }

/* ============ Nav ============ */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(39,52,69,0.97);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between; height: 60px;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--white); font-weight: 700; font-size: 16px;
}
.nav-brand:hover { color: var(--white); }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { color: rgba(255,255,255,0.7); font-size: 14px; font-weight: 500; }
.nav-links a:not(.btn):hover { color: var(--white); }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px;
}
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--white); border-radius: 2px; }

@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 60px; left: 0; right: 0;
    background: var(--slate-700); padding: 20px 32px; gap: 14px;
  }
  .nav-links.open a { font-size: 16px; }
}

/* ============ Scroll reveal ============ */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ Hero ============ */
.hero {
  padding: 72px 0 0;
  text-align: center;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(54, 137, 230, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(104, 183, 35, 0.06) 0%, transparent 50%),
    var(--white);
  overflow: hidden;
}
.hero-center {
  max-width: 680px;
  margin: 0 auto 48px;
}
.hero-center h1 {
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.12;
  font-weight: 800;
  color: var(--slate-900);
  letter-spacing: -0.03em;
  margin-bottom: 18px;
  animation: hero-fade-up 0.8s ease both;
}
.hero-sub {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--slate-500);
  line-height: 1.55;
  margin-bottom: 28px;
  animation: hero-fade-up 0.8s 0.15s ease both;
}
.hero-ctas {
  display: flex; align-items: center; justify-content: center; gap: 20px; flex-wrap: wrap;
  animation: hero-fade-up 0.8s 0.3s ease both;
}

@keyframes hero-fade-up {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero-version { font-size: 13px; color: var(--slate-300); }
#latest-version { font-weight: 600; color: var(--slate-500); }

/* Hero screenshot */
.hero-screenshot-wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 32px;
}
.hero-img {
  border-radius: var(--radius);
  border: 1px solid var(--silver-300);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.18), 0 6px 16px rgba(0, 0, 0, 0.08);
  animation: hero-img-enter 1s 0.4s ease both;
}

@keyframes hero-img-enter {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ============================================================
   FEATURE SECTIONS — alternating text LEFT / screenshot RIGHT
   ============================================================ */
.feat {
  padding: 100px 0;
}
.feat-alt {
  background: var(--silver-100);
}

.feat-row {
  display: flex;
  align-items: center;
  gap: 56px;
}

.feat-row .feat-text {
  flex: 0 0 38%;
  min-width: 0;
}
.feat-row .feat-img {
  flex: 1 1 0%;
  min-width: 0;
}

.feat-reverse {
  flex-direction: row-reverse;
}

.feat-text h2 {
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.15;
  font-weight: 800;
  color: var(--slate-900);
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  position: relative;
  display: inline-block;
}
.feat-text h2::after {
  content: '';
  display: block;
  width: 0;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin-top: 12px;
  transition: width 0.6s ease;
}
.feat.visible .feat-text h2::after {
  width: 48px;
}
.feat-text p {
  font-size: 15.5px;
  color: var(--slate-500);
  line-height: 1.7;
  margin-bottom: 10px;
}
.feat-muted {
  font-size: 13.5px !important;
  color: var(--slate-300) !important;
}
.feat-list {
  margin-top: 14px;
}
.feat-list li {
  font-size: 14.5px;
  color: var(--slate-700);
  padding: 5px 0;
}
.feat-list li strong {
  color: var(--slate-900);
}

.feat-img {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-img);
  border: 1px solid var(--silver-300);
}

/* Imágenes ampliables + lightbox */
.zoomable {
  cursor: zoom-in;
}
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background: rgba(15, 23, 32, 0.92);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  cursor: zoom-out;
}
.lightbox.open {
  opacity: 1;
  visibility: visible;
}
.lightbox img {
  max-width: 95vw;
  max-height: 92vh;
  width: auto;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  cursor: default;
  transform: scale(0.97);
  transition: transform 0.2s ease;
}
.lightbox.open img {
  transform: scale(1);
}
.lightbox-close {
  position: absolute;
  top: 18px;
  right: 22px;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: var(--white);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}
.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* Sección BIM — azul Blueberry (la tesis del producto) */
.feat-bim {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dk) 100%);
}
.feat-bim .feat-text h2 {
  color: var(--white);
}
.feat-bim .feat-text p {
  color: rgba(255, 255, 255, 0.82);
}
.feat-bim .feat-list li {
  color: rgba(255, 255, 255, 0.88);
}
.feat-bim .feat-list li strong {
  color: var(--white);
}
.feat-bim .feat-muted-light {
  color: rgba(255, 255, 255, 0.55) !important;
  font-size: 13.5px !important;
}
.feat-bim .feat-img {
  border-color: rgba(255, 255, 255, 0.15);
}
.feat-bim .feat-text h2::after {
  background: rgba(255, 255, 255, 0.5);
}

/* Sección Terreno — verde Lime suave */
.feat-terra {
  background: var(--lime-soft);
}
.feat-terra .feat-text h2::after {
  background: var(--lime);
}

/* Sección puente IngePresupuestos — naranja de la casa hermana */
.bridge {
  padding: 90px 0;
  background: var(--orange-soft);
  text-align: center;
}
.bridge-icon {
  width: 56px; height: 56px; margin: 0 auto 18px;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.12));
}
.bridge h2 {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 800; color: var(--slate-900); letter-spacing: -0.02em;
  max-width: 640px; margin: 0 auto 16px;
}
.bridge p {
  font-size: 15.5px; color: var(--slate-500); line-height: 1.7;
  max-width: 620px; margin: 0 auto 12px;
}
.bridge .flow {
  display: inline-block; margin: 10px auto 22px;
  font-weight: 700; font-size: 15px; color: var(--orange-dk);
  background: var(--white); border: 1px solid var(--silver-300);
  border-radius: 999px; padding: 10px 22px; box-shadow: var(--shadow);
}

@media (max-width: 860px) {
  .feat { padding: 64px 0; }
  .feat-row {
    flex-direction: column !important;
    gap: 36px;
  }
  .feat-row .feat-text { flex: none; width: 100%; }
  .feat-row .feat-img  { flex: none; width: 100%; }
}

/* ============ Impact (dark centered statement) ============ */
.impact {
  padding: 100px 32px;
  background: var(--slate-900);
  text-align: center;
}
.impact h2 {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 800;
  color: var(--white);
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  max-width: 640px;
  margin-left: auto; margin-right: auto;
}
.impact p {
  font-size: clamp(15px, 1.6vw, 17px);
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  max-width: 580px;
  margin: 0 auto;
}

/* ============ Download ============ */
.download-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-dk));
  text-align: center; color: var(--white);
}
.download-section h2 {
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 800; color: var(--white); margin-bottom: 10px;
}
.download-sub { font-size: 16px; color: rgba(255,255,255,0.9); margin-bottom: 40px; }
.dl-row {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
}
.dl-group { text-align: center; }
.dl-group-label {
  display: inline-block; font-size: 14px; font-weight: 700; color: rgba(255,255,255,0.95);
  letter-spacing: 0.02em; margin-bottom: 12px;
}
.dl-group-cards { display: flex; gap: 10px; margin-bottom: 8px; justify-content: center; flex-wrap: wrap; align-items: flex-start; }
.dl-card {
  background: var(--white); color: var(--slate-700);
  border-radius: var(--radius); text-align: center;
  transition: all 0.2s; box-shadow: var(--shadow);
}
.dl-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-img); color: var(--slate-700); }
.dl-card svg { color: var(--slate-500); margin-bottom: 6px; }
.dl-card strong { display: block; font-size: 14px; color: var(--slate-900); margin-bottom: 1px; }
.dl-card span { font-size: 11px; color: var(--slate-300); }
.dl-card-compact { padding: 16px 28px; min-width: 130px; }
.dl-note { font-size: 13px; color: rgba(255,255,255,0.85); margin-top: 18px; }
.dl-group-alt { font-size: 12px; color: rgba(255,255,255,0.7); }
.dl-divider { height: 1px; width: 100%; max-width: 340px; background: rgba(255,255,255,0.18); margin: 22px auto 8px; }
@media (max-width: 760px) { .dl-divider { display: none; } .dl-row { gap: 24px; } }
.dl-note a { color: var(--white); text-decoration: underline; text-underline-offset: 3px; }

/* Bloque copiable de instalación desde código */
.dl-code {
  display: flex; align-items: center; gap: 8px;
  width: fit-content; max-width: min(100%, 680px); margin: 16px auto 6px;
  background: var(--slate-900);
  border: 1px solid rgba(255,255,255,.12); border-radius: 10px;
  padding: 9px 10px 9px 14px;
}
.dl-code code {
  color: #e2e8f0; font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 13px; white-space: pre; text-align: left;
  background: transparent; padding: 0; border-radius: 0;
  overflow-x: auto; max-width: 74vw;
}
.dl-code-copy {
  background: var(--accent); color: #fff; border: 0; border-radius: 7px;
  padding: 6px 12px; font-size: 13px; font-weight: 600; cursor: pointer;
  flex: none;
}
.dl-code-copy:hover { filter: brightness(1.1); }
.dl-code-copy.copied { background: #27AE60; }

/* ============ Generic section ============ */
.section { padding: 90px 0; }
.bg-light { background: var(--silver-100); }
.section-head {
  text-align: center; max-width: 580px; margin: 0 auto 52px;
}
.section-head h2 {
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 800; color: var(--slate-900); letter-spacing: -0.02em; margin-bottom: 12px;
}
.section-head p { font-size: 16px; color: var(--slate-500); }

/* ============ FAQ ============ */
.faq-list { display: grid; gap: 10px; }
.faq-item {
  background: var(--white); border: 1px solid var(--silver-300);
  border-radius: var(--radius-sm); transition: all 0.15s;
}
.faq-item[open] { border-color: var(--accent); box-shadow: var(--shadow); }
.faq-item summary {
  cursor: pointer; padding: 16px 48px 16px 20px;
  font-weight: 600; font-size: 15px; color: var(--slate-700);
  list-style: none; position: relative;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%);
  font-size: 22px; font-weight: 300; color: var(--accent);
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { padding: 0 20px 18px; color: var(--slate-500); font-size: 14.5px; line-height: 1.65; }
.faq-item p strong { color: var(--slate-700); }

/* ============ Footer ============ */
.footer {
  background: var(--slate-900); color: rgba(255,255,255,0.7);
  padding: 60px 0 32px; font-size: 14px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 44px;
}
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px 16px; }
}
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer-brand strong { color: var(--white); font-size: 16px; }
.footer-col p { color: var(--slate-300); line-height: 1.6; margin-bottom: 8px; }
.footer-col h4 {
  color: var(--white); font-size: 12px; font-weight: 700;
  margin-bottom: 12px; letter-spacing: 0.5px; text-transform: uppercase;
}
.footer-col li { padding: 3px 0; }
.footer-col li a { color: rgba(255,255,255,0.7); font-size: 13px; }
.footer-col li a:hover { color: var(--accent); }
.footer-copy { font-size: 12px; color: var(--slate-300); margin-top: 14px; }

@media print {
  .nav, .hero-ctas, .download-section, .footer { display: none; }
}