@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700;900&display=swap');

/* ==========================================================================
   VARIABLES GLOBALES
   ========================================================================== */
:root {
  --primary-dark:   #0f172a;
  --primary-mid:    #1e293b;
  --accent:         #2563eb;
  --accent-hover:   #1d4ed8;
  --accent-glow:    rgba(37,99,235,0.35);
  --bg-light:       #f0f4f8;
  --bg-white:       #ffffff;
  --text-main:      #1e293b;
  --text-muted:     #64748b;
  --border-color:   #e2e8f0;
  --radius:         10px;
  --transition:     all 0.35s cubic-bezier(0.4,0,0.2,1);
}

/* ==========================================================================
   RESET & TIPOGRAFÍA
   ========================================================================== */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-main);
  background-color: var(--bg-light);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ==========================================================================
   ANIMACIONES GLOBALES
   ========================================================================== */
@keyframes fadeInBody {
  from { opacity:0; }
  to   { opacity:1; }
}
body { animation: fadeInBody 0.6s ease-out; }

@keyframes slideUp {
  from { opacity:0; transform:translateY(40px); }
  to   { opacity:1; transform:translateY(0); }
}

@keyframes slideLeft {
  from { opacity:0; transform:translateX(40px); }
  to   { opacity:1; transform:translateX(0); }
}

@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  33%       { transform: translateY(-18px) rotate(2deg); }
  66%       { transform: translateY(-8px) rotate(-1deg); }
}

@keyframes pulse-ring {
  0%   { transform: scale(1);   opacity:0.6; }
  100% { transform: scale(1.6); opacity:0; }
}

@keyframes shimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

@keyframes borderGlow {
  0%,100% { box-shadow: 0 0 0 2px rgba(37,99,235,0.15); }
  50%      { box-shadow: 0 0 0 4px rgba(37,99,235,0.35); }
}

@keyframes badge-pulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(37,99,235,0.4); }
  70%      { box-shadow: 0 0 0 8px rgba(37,99,235,0); }
}

@keyframes countUp {
  from { transform: translateY(12px); opacity:0; }
  to   { transform: translateY(0);    opacity:1; }
}

@keyframes particleFloat {
  0%   { transform: translateY(0) translateX(0) scale(1);   opacity:0.6; }
  50%  { transform: translateY(-60px) translateX(20px) scale(1.1); opacity:0.3; }
  100% { transform: translateY(-120px) translateX(-10px) scale(0.8); opacity:0; }
}

/* Clases de animación activadas por IntersectionObserver */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.65s cubic-bezier(0.4,0,0.2,1),
              transform 0.65s cubic-bezier(0.4,0,0.2,1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal-left.visible { opacity:1; transform:translateX(0); }

/* Delays escalonados */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* ==========================================================================
   NAVEGACIÓN (Glassmorphism + scroll shrink via JS class)
   ========================================================================== */
nav {
  position: fixed;
  top: 0; width: 100%; z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 2.5rem;
  background: rgba(15,23,42,0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: padding 0.3s ease, background 0.3s ease;
}
nav.scrolled {
  padding: 0.5rem 2.5rem;
  background: rgba(15,23,42,0.97);
}

.nav-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-decoration: none;
  line-height: 1.1;
  transition: opacity 0.25s;
}
.nav-logo:hover { opacity: 0.85; }

.nav-logo-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.03em;
}
.nav-logo-name .accent { color: #60a5fa; }

.nav-logo-sub {
  font-size: 0.62rem;
  font-weight: 600;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.nav-links { display:flex; list-style:none; gap:2rem; }
.nav-links a {
  text-decoration:none; color:rgba(255,255,255,0.75);
  font-weight:500; font-size:0.9rem;
  transition: color 0.25s;
  position: relative;
}
.nav-links a::after {
  content:''; position:absolute; bottom:-4px; left:0;
  width:0; height:2px; background: #60a5fa;
  transition: width 0.3s ease;
}
.nav-links a:hover { color:#fff; }
.nav-links a:hover::after { width:100%; }

.nav-cta {
  text-decoration:none;
  background: var(--accent); color:#fff;
  padding:0.55rem 1.3rem; border-radius:var(--radius);
  font-weight:700; font-size:0.875rem;
  transition: var(--transition);
  animation: badge-pulse 2.5s infinite;
}
.nav-cta:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px var(--accent-glow);
  animation: none;
}

/* ==========================================================================
   HERO — Gradiente animado + partículas CSS
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 9rem 2rem 6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(
    -45deg,
    #020617, #0f172a, #1e3a5f, #0f172a, #0a1628, #1e3a5f
  );
  background-size: 400% 400%;
  animation: gradientShift 12s ease infinite;
  color: #fff;
}

/* Partículas flotantes via pseudo-elementos + divs generados por JS */
.hero::before {
  content:'';
  position:absolute; inset:0;
  background: radial-gradient(ellipse 75% 55% at 50% 45%, rgba(37,99,235,0.2) 0%, transparent 70%);
  pointer-events:none;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(96,165,250,0.5);
  pointer-events: none;
  animation: particleFloat linear infinite;
}

.hero-badge {
  display: inline-flex; align-items:center; gap:0.5rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  padding: 0.45rem 1.1rem; border-radius:50px;
  font-size: 0.82rem; font-weight:700;
  letter-spacing:1px; text-transform:uppercase;
  color: #93c5fd;
  margin-bottom: 1.75rem;
  animation: slideUp 0.8s ease 0.2s both;
}

.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 4rem);
  font-weight: 900; line-height:1.1;
  letter-spacing:-0.03em;
  margin-bottom: 1.5rem;
  animation: slideUp 0.8s ease 0.4s both;
}

.hero h1 .highlight {
  background: linear-gradient(90deg, #60a5fa 0%, #a78bfa 50%, #60a5fa 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s linear infinite;
}

.hero p {
  font-size: 1.15rem; color:#cbd5e1;
  max-width: 660px; margin: 0 auto 2.5rem;
  animation: slideUp 0.8s ease 0.6s both;
}

.hero-btns {
  display:flex; gap:1rem; justify-content:center; flex-wrap:wrap;
  animation: slideUp 0.8s ease 0.8s both;
}

/* ==========================================================================
   BOTONES
   ========================================================================== */
.btn-primary, .btn-secondary {
  display:inline-block; padding:0.9rem 2rem;
  border-radius:var(--radius); text-decoration:none;
  font-weight:700; font-size:0.95rem;
  transition: var(--transition); cursor:pointer; border:none;
}

.btn-primary {
  background: var(--accent); color:#fff;
  box-shadow: 0 4px 12px var(--accent-glow);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 28px var(--accent-glow);
}

.btn-secondary {
  background:transparent; color:#fff;
  border: 2px solid rgba(255,255,255,0.3);
}
.btn-secondary:hover {
  border-color:#fff;
  background: rgba(255,255,255,0.07);
  transform: translateY(-2px);
}

/* ==========================================================================
   STATS BAR
   ========================================================================== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  background:#fff;
  border-bottom: 1px solid var(--border-color);
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}

.stat { padding: 0.5rem; }

.stat-num {
  font-size: 2.4rem; font-weight:900;
  color: var(--accent);
  margin-bottom: 0.2rem;
  display: block;
  animation: countUp 0.6s ease both;
}

.stat-label {
  font-size: 0.78rem; font-weight:700;
  color: var(--text-muted);
  text-transform:uppercase; letter-spacing:0.08em;
}

/* ==========================================================================
   SECCIONES GENERALES
   ========================================================================== */
section { padding: 6rem 0; }

.section-tag {
  color: var(--accent); font-weight:700;
  text-transform:uppercase; letter-spacing:0.12em;
  font-size:0.8rem; margin-bottom:0.6rem; text-align:center;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  color: var(--primary-dark); font-weight:900;
  text-align:center; margin-bottom:1rem; letter-spacing:-0.02em;
}

.section-desc {
  text-align:center; color:var(--text-muted);
  max-width:580px; margin:0 auto 3rem;
  font-size:1.05rem;
}

/* ==========================================================================
   SERVICIOS
   ========================================================================== */
#servicios { background-color: var(--bg-light); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
}

.service-card {
  background: var(--bg-white);
  padding: 2.25rem;
  border-radius: 14px;
  border: 1px solid var(--border-color);
  border-top: 4px solid var(--accent);
  transition: var(--transition);
  position: relative; overflow:hidden;
}

/* Shimmer de fondo en hover */
.service-card::after {
  content:'';
  position:absolute; top:0; left:-100%; width:60%; height:100%;
  background: linear-gradient(90deg, transparent, rgba(37,99,235,0.05), transparent);
  transition: left 0.6s ease;
}
.service-card:hover::after { left:140%; }

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 40px rgba(37,99,235,0.12);
  border-top-color: #60a5fa;
}

.service-icon {
  font-size:2.5rem; margin-bottom:1.25rem;
  display:block;
  transition: transform 0.4s ease;
}
.service-card:hover .service-icon { transform: scale(1.15) rotate(-5deg); }

.service-card h3 {
  color: var(--primary-dark); font-size:1.15rem;
  font-weight:800; margin-bottom:0.75rem;
}
.service-card p { color:var(--text-muted); font-size:0.9rem; margin-bottom:1.25rem; line-height:1.75; }

.service-tag {
  display:inline-block;
  background:#dbeafe; color:#1d4ed8;
  padding:0.3rem 0.85rem; border-radius:999px;
  font-size:0.75rem; font-weight:700;
}

/* ==========================================================================
   AUTORIDAD / CREDENCIALES
   ========================================================================== */
#autoridad { background:#fff; }

.credentials-grid {
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap:1.75rem;
}

.credential-card {
  background: var(--bg-light);
  padding:2.25rem; border-radius:14px;
  border: 1px solid var(--border-color);
  border-top: 4px solid var(--primary-dark);
  transition: var(--transition);
  position:relative; overflow:hidden;
}
.credential-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 40px rgba(15,23,42,0.12);
}
.credential-icon { font-size:2.5rem; margin-bottom:1.25rem; display:block; }
.credential-card h4 { color:var(--primary-dark); font-size:1.05rem; font-weight:800; margin-bottom:0.6rem; }
.credential-card p  { color:var(--text-muted); font-size:0.875rem; line-height:1.75; }

/* ==========================================================================
   METODOLOGÍA
   ========================================================================== */
#metodologia { background: var(--bg-light); }

.steps {
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap:2rem;
}

.step {
  background:#fff; padding:1.75rem; border-radius:14px;
  border:1px solid var(--border-color);
  display:flex; gap:1.25rem; align-items:flex-start;
  transition: var(--transition);
  position:relative;
}
.step:hover {
  transform:translateY(-4px);
  box-shadow: 0 16px 32px rgba(0,0,0,0.07);
}

/* Línea conectora entre pasos */
.step:not(:last-child)::after {
  content:''; position:absolute;
  top:2.25rem; right:-1rem;
  width:1rem; height:2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  display:none;
}

.step-num {
  min-width:42px; height:42px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color:#fff; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-weight:900; font-size:1rem; flex-shrink:0;
  box-shadow: 0 4px 12px var(--accent-glow);
  position:relative;
}
/* Anillo pulsante en el número */
.step-num::before {
  content:'';
  position:absolute; inset:-4px;
  border-radius:50%;
  border: 2px solid var(--accent);
  animation: pulse-ring 2s ease-out infinite;
}

.step h4 { color:var(--primary-dark); font-weight:800; margin-bottom:0.4rem; font-size:0.95rem; }
.step p  { color:var(--text-muted); font-size:0.875rem; }

/* ==========================================================================
   CONTACTO
   ========================================================================== */
#contacto { background:#fff; border-top:1px solid var(--border-color); }

.contact-grid {
  display:grid; grid-template-columns:1fr 1fr;
  border-radius:16px; overflow:hidden;
  border:1px solid var(--border-color);
  box-shadow: 0 20px 60px rgba(0,0,0,0.07);
}

.contact-info {
  padding:3rem;
  background: linear-gradient(160deg, var(--primary-dark) 0%, #0f2952 100%);
  color:#fff; position:relative; overflow:hidden;
}
.contact-info::before {
  content:'';
  position:absolute; bottom:-60px; right:-60px;
  width:220px; height:220px; border-radius:50%;
  background: rgba(37,99,235,0.18);
}

.contact-info p { color:#cbd5e1; margin-bottom:2rem; line-height:1.8; }

.contact-detail {
  display:flex; align-items:center; gap:1rem;
  margin-bottom:1.2rem; color:#e2e8f0; font-size:0.95rem;
}
.contact-detail .icon {
  width:38px; height:38px; border-radius:8px;
  background:rgba(255,255,255,0.08);
  border:1px solid rgba(255,255,255,0.12);
  display:flex; align-items:center; justify-content:center; font-size:1rem;
}

.contact-form {
  padding:3rem; background:#fff;
  display:flex; flex-direction:column; gap:1rem;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width:100%; padding:0.9rem 1rem;
  border:1.5px solid var(--border-color);
  border-radius:var(--radius);
  font-family:inherit; font-size:0.95rem;
  color:var(--text-main); background:#fff;
  transition: border-color 0.25s, box-shadow 0.25s;
  outline:none;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--accent);
  animation: borderGlow 1.5s ease infinite;
}
.contact-form textarea { resize:vertical; min-height:120px; }

.contact-form .btn-primary { width:100%; text-align:center; margin-top:0.5rem; }

/* Botón secundario en panel oscuro */
.contact-info .btn-secondary {
  display:inline-block; margin-top:1.5rem;
  border-color: rgba(255,255,255,0.4); color:#fff;
}
.contact-info .btn-secondary:hover {
  border-color:#fff; background:rgba(255,255,255,0.08);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
footer {
  background:#020617; color:#94a3b8;
  padding:3.5rem 2rem 2rem;
  text-align:center;
  font-size:0.85rem;
}

.footer-top {
  display:flex; flex-wrap:wrap;
  justify-content:space-between; align-items:center;
  max-width:1200px; margin:0 auto 2rem;
  padding-bottom:2rem;
  border-bottom:1px solid rgba(255,255,255,0.06);
  gap:1.5rem;
}

.footer-logo { 
  display: flex; 
  flex-direction: column; 
  align-items: flex-start;
  line-height: 1.1;
}

.security-badges { display:flex; gap:0.75rem; flex-wrap:wrap; justify-content:center; }
.badge {
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.09);
  padding:0.35rem 0.85rem; border-radius:6px;
  font-size:0.75rem; color:#cbd5e1;
  transition: background 0.25s;
}
.badge:hover { background:rgba(37,99,235,0.2); border-color:rgba(37,99,235,0.4); }

/* ==========================================================================
   MEDIA QUERIES
   ========================================================================== */
@media (max-width:900px) {
  .contact-grid { grid-template-columns:1fr; }
}

@media (max-width:768px) {
  .nav-links { display:none; }
  .hero h1 { font-size:2.4rem; }
  .hero-btns { flex-direction:column; width:100%; }
  .hero-btns a { text-align:center; }
  .section-title { font-size:1.9rem; }
  .stats-bar { grid-template-columns:1fr 1fr; gap:1.5rem; }
  .footer-top { flex-direction:column; align-items:center; }
  /* Flip en mobile: se activa con click (via JS) */
  .flip-card-inner { touch-action: manipulation; }
}

/* ==========================================================================
   SLIDE CARDS — Imagen estática + panel que sube al hacer hover
   ========================================================================== */
.slide-card {
  position: relative;
  height: 400px;
  border-radius: 14px;
  overflow: hidden;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,0,0,0.12);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.slide-card:hover {
  box-shadow: 0 16px 40px rgba(37,99,235,0.2);
  transform: translateY(-4px);
}

/* Imagen de fondo */
.card-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform 0.6s ease;
}
.slide-card:hover .card-bg {
  transform: scale(1.05);
}

/* Etiqueta siempre visible en la parte inferior */
.card-front-label {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 1.5rem 1.75rem;
  background: linear-gradient(
    to top,
    rgba(5, 15, 40, 0.92) 0%,
    rgba(10, 20, 60, 0.6) 60%,
    transparent 100%
  );
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  transition: opacity 0.35s ease;
  z-index: 1;
}
.slide-card:hover .card-front-label {
  opacity: 0;
}

.card-front-label h3 {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 800;
  margin: 0;
  line-height: 1.3;
}

.service-icon-sm {
  font-size: 1.75rem;
  line-height: 1;
}

.más-info {
  font-size: 0.72rem;
  font-weight: 700;
  color: #93c5fd;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Panel de información que sube desde abajo */
.card-panel {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 100%;
  background: #fff;
  padding: 1.75rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.6rem;
  transform: translateY(100%);
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2;
  border-radius: 14px;
  overflow: hidden;
}
.slide-card:hover .card-panel {
  transform: translateY(0);
}

.card-panel h3 {
  color: var(--primary-dark);
  font-size: 1.1rem;
  font-weight: 800;
  margin: 0;
  line-height: 1.3;
}

.card-panel p {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.7;
  margin: 0;
  flex: 1;
}

/* CTA dentro del panel */
.btn-flip-cta {
  display: inline-block;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 0.25s;
  padding-top: 0.25rem;
  border-top: 1px solid var(--border-color);
}
.btn-flip-cta:hover {
  color: var(--accent-hover);
  letter-spacing: 0.02em;
}


.flip-card {
  perspective: 1200px;
  height: 360px;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.4, 0.2, 0.2, 1);
  will-change: transform;
}

/* La clase .flipped la agrega/quita JS en mouseenter/mouseleave */
.flip-card-inner.flipped {
  transform: rotateY(180deg);
}

/* Cara frontal — imagen fotorrealista */
.flip-card-front {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 14px;
  overflow: hidden;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

/* Overlay degradado sobre la imagen del frente */
.flip-front-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(5, 15, 40, 0.88) 0%,
    rgba(10, 20, 60, 0.55) 55%,
    rgba(15, 23, 42, 0.25) 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.75rem;
  gap: 0.5rem;
}

.flip-front-overlay h3 {
  color: #fff;
  font-size: 1.15rem;
  font-weight: 800;
  margin: 0;
  line-height: 1.3;
}

.service-icon-sm {
  font-size: 2rem;
  line-height: 1;
}

/* Cara trasera — texto explicativo */
.flip-card-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  transform: rotateY(180deg);
  border-radius: 14px;
  overflow: hidden;
}

/* service-card dentro del back */
.flip-card-back.service-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: center;
}

/* CTA en el reverso */
.btn-flip-cta {
  display: inline-block;
  margin-top: auto;
  padding-top: 1rem;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 0.25s, letter-spacing 0.25s;
}
.btn-flip-cta:hover {
  color: var(--accent-hover);
  letter-spacing: 0.02em;
}


.flip-back-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(5, 15, 40, 0.92) 0%,
    rgba(10, 20, 60, 0.75) 50%,
    rgba(15, 23, 42, 0.55) 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2rem;
  gap: 0.75rem;
}

.flip-back-overlay h3 {
  color: #fff;
  font-size: 1.25rem;
  font-weight: 800;
  margin: 0;
}

.flip-back-overlay p {
  color: #cbd5e1;
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 0;
}

.flip-back-overlay .btn-primary {
  align-self: flex-start;
  padding: 0.6rem 1.4rem;
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

/* Indicador de hover en cara frontal */
.flip-hint {
  margin-top: auto;
  padding-top: 1rem;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
  opacity: 0.7;
  transition: opacity 0.3s;
}
.flip-card:hover .flip-hint { opacity: 0; }

/* Ajustar service-card dentro del flip */
.flip-card-front.service-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}