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

:root {
  /* Color ramps */
  --primary-50: #e8f0ee;
  --primary-100: #c5d9d4;
  --primary-200: #9ab8af;
  --primary-300: #6e968a;
  --primary-400: #4a7a6c;
  --primary-500: #2f6354;
  --primary-600: #234f43;
  --primary-700: #1c4036;
  --primary-800: #163229;
  --primary-900: #0f241d;

  --accent-400: #d4a843;
  --accent-500: #c69536;
  --accent-600: #b0822a;

  --neutral-50: #f8f9f8;
  --neutral-100: #eef0ef;
  --neutral-200: #dde1de;
  --neutral-300: #c4cac5;
  --neutral-400: #9aa19b;
  --neutral-500: #71786f;
  --neutral-600: #565c54;
  --neutral-700: #3e433c;
  --neutral-800: #2a2e28;
  --neutral-900: #181b16;

  --success: #2d8659;
  --warning: #c69536;
  --error: #c0392b;

  --bg: #f7f8f6;
  --surface: #ffffff;
  --text: var(--neutral-800);
  --text-muted: var(--neutral-500);
  --border: var(--neutral-200);

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-serif: 'Source Serif 4', Georgia, serif;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(15,36,29,.06);
  --shadow: 0 4px 20px rgba(15,36,29,.08);
  --shadow-lg: 0 12px 40px rgba(15,36,29,.12);
  --transition: 250ms cubic-bezier(.4,0,.2,1);
  --container: 1200px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ===== TYPOGRAPHY ===== */
h1, h2, h3 { line-height: 1.2; font-weight: 700; letter-spacing: -0.02em; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.5rem); }
h3 { font-size: 1.15rem; }
p { font-size: 1rem; }

.section-eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--primary-500);
  margin-bottom: 12px;
}
.section-head { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.section-head h2 { color: var(--neutral-900); }
.section-desc { color: var(--text-muted); margin-top: 12px; font-size: 1.05rem; }

.accent { color: var(--accent-500); }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: .95rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary-600);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-700); transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-ghost {
  background: transparent;
  color: var(--primary-700);
  border: 1.5px solid var(--primary-300);
}
.btn-ghost:hover { background: var(--primary-50); border-color: var(--primary-500); }
.btn-full { width: 100%; }

/* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(247,248,246,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(255,255,255,.95);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  background: var(--primary-600);
  color: #fff;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.logo-text { font-size: 1.1rem; color: var(--neutral-900); }
.main-nav { display: flex; align-items: center; gap: 32px; }
.main-nav a {
  font-size: .9rem;
  font-weight: 500;
  color: var(--neutral-600);
  transition: color var(--transition);
  position: relative;
}
.main-nav a:hover { color: var(--primary-600); }
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--accent-500);
  transition: width var(--transition);
}
.main-nav a:hover::after { width: 100%; }
.nav-cta {
  background: var(--primary-600);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
}
.nav-cta:hover { background: var(--primary-700); }
.nav-cta::after { display: none; }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.menu-toggle span {
  width: 24px; height: 2px;
  background: var(--neutral-800);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(180deg, var(--primary-50) 0%, var(--bg) 100%);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -20%; right: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(47,99,84,.07) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content { max-width: 760px; position: relative; z-index: 1; }
.hero-eyebrow {
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--primary-500);
  margin-bottom: 16px;
}
.hero-title { color: var(--neutral-900); margin-bottom: 20px; }
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--neutral-600);
  max-width: 580px;
  margin-bottom: 32px;
  font-family: var(--font-serif);
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}
.stat { text-align: center; }
.stat-num {
  display: block;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--primary-600);
  letter-spacing: -0.02em;
}
.stat-label {
  font-size: .85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== NOSOTROS ===== */
.nosotros { padding: 80px 0; }
.nosotros-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 56px;
  align-items: start;
}
.nosotros-text p {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--neutral-700);
  margin-bottom: 20px;
}
.nosotros-text strong { color: var(--primary-600); }
.nosotros-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}
.nosotros-card h3 { color: var(--neutral-900); margin-bottom: 20px; }
.funciones-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--neutral-100);
  font-size: .95rem;
  color: var(--neutral-700);
}
.funciones-list li:last-child { border-bottom: none; }
.check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px; height: 22px;
  background: var(--primary-50);
  color: var(--primary-600);
  border-radius: 50%;
  font-size: .7rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===== SERVICIOS ===== */
.servicios { padding: 80px 0; background: var(--neutral-50); }
.servicios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.servicio-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
  cursor: default;
}
.servicio-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--primary-200);
}
.servicio-icono {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  background: var(--primary-50);
  color: var(--primary-600);
  border-radius: 12px;
  margin-bottom: 16px;
}
.servicio-card h3 { color: var(--neutral-900); margin-bottom: 8px; font-size: 1rem; }
.servicio-card p { font-size: .88rem; color: var(--text-muted); line-height: 1.55; }

/* ===== PORTAFOLIO ===== */
.portafolio { padding: 80px 0; }

/* Filtros */
.filtros {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 48px;
}
.filtro-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 100px;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--neutral-600);
  font-size: .85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.filtro-btn:hover { border-color: var(--primary-300); color: var(--primary-600); }
.filtro-btn.active {
  background: var(--primary-600);
  border-color: var(--primary-600);
  color: #fff;
}
.filtro-count {
  font-size: .72rem;
  font-weight: 600;
  background: rgba(0,0,0,.08);
  padding: 2px 8px;
  border-radius: 100px;
}
.filtro-btn.active .filtro-count { background: rgba(255,255,255,.2); }

/* Casos grid */
.casos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.caso-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  animation: fadeIn .4s ease both;
}
.caso-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-200);
}
.caso-card.hidden { display: none; }
.caso-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.caso-categoria {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--primary-600);
  background: var(--primary-50);
  padding: 4px 12px;
  border-radius: 100px;
}
.caso-anio {
  font-size: .82rem;
  font-weight: 600;
  color: var(--text-muted);
}
.caso-titulo {
  color: var(--neutral-900);
  font-size: 1.1rem;
  line-height: 1.35;
  margin-bottom: 8px;
}
.caso-cliente {
  font-size: .88rem;
  color: var(--accent-600);
  font-weight: 500;
  margin-bottom: 12px;
}
.caso-resumen {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.6;
  flex-grow: 1;
  margin-bottom: 16px;
}
.caso-metricas {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.metrica-chip {
  font-size: .78rem;
  font-weight: 500;
  color: var(--primary-700);
  background: var(--primary-50);
  padding: 5px 12px;
  border-radius: 6px;
}
.caso-ver {
  background: none;
  border: none;
  color: var(--primary-600);
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  padding: 0;
  transition: gap var(--transition);
}
.caso-ver:hover { color: var(--primary-800); }

.no-resultados {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.05rem;
  padding: 40px;
}

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

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,36,29,.5);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.modal-overlay.open { opacity: 1; pointer-events: auto; }
.modal {
  background: var(--surface);
  border-radius: var(--radius-lg);
  max-width: 720px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  transform: translateY(20px) scale(.97);
  transition: transform var(--transition);
  box-shadow: var(--shadow-lg);
}
.modal-overlay.open .modal { transform: translateY(0) scale(1); }
.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  width: 36px; height: 36px;
  border: none;
  background: var(--neutral-100);
  border-radius: 50%;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  color: var(--neutral-600);
  transition: var(--transition);
  z-index: 1;
}
.modal-close:hover { background: var(--neutral-200); color: var(--neutral-900); }
.modal-body { padding: 40px; }

.modal-categoria {
  display: inline-block;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--primary-600);
  background: var(--primary-50);
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.modal-titulo {
  font-size: 1.5rem;
  color: var(--neutral-900);
  margin-bottom: 8px;
  line-height: 1.3;
}
.modal-cliente {
  font-size: .95rem;
  color: var(--accent-600);
  font-weight: 500;
  margin-bottom: 28px;
}
.modal-seccion { margin-bottom: 24px; }
.modal-seccion h4 {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--primary-500);
  margin-bottom: 8px;
}
.modal-seccion p {
  font-size: .95rem;
  color: var(--neutral-700);
  line-height: 1.7;
}
.modal-metricas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}
.modal-metrica {
  background: var(--primary-50);
  border: 1px solid var(--primary-100);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  text-align: center;
  flex: 1;
  min-width: 140px;
}
.modal-metrica strong {
  display: block;
  font-size: 1.3rem;
  color: var(--primary-600);
  font-weight: 700;
}
.modal-metrica span {
  font-size: .8rem;
  color: var(--text-muted);
}

/* ===== CONTACTO ===== */
.contacto { padding: 80px 0; background: var(--primary-900); color: #fff; }
.contacto .section-eyebrow { color: var(--accent-400); }
.contacto h2 { color: #fff; margin-bottom: 16px; }
.contacto-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.contacto-info p { color: rgba(255,255,255,.75); margin-bottom: 32px; font-size: 1.05rem; line-height: 1.7; }
.contacto-lista li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.contacto-ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  background: rgba(255,255,255,.08);
  border-radius: 12px;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.contacto-label {
  display: block;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: rgba(255,255,255,.5);
  margin-bottom: 2px;
}
.contacto-lista a, .contacto-lista span:not(.contacto-ico) {
  color: #fff;
  font-size: 1rem;
  font-weight: 500;
  display: block;
}
.contacto-lista a:hover { color: var(--accent-400); }

.contacto-form {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-lg);
  padding: 36px;
  backdrop-filter: blur(8px);
}
.contacto-form h3 { color: #fff; margin-bottom: 24px; font-size: 1.3rem; }
.form-row { margin-bottom: 16px; }
.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255,255,255,.06);
  border: 1.5px solid rgba(255,255,255,.15);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: .92rem;
  font-family: var(--font-sans);
  transition: var(--transition);
}
.form-row input::placeholder,
.form-row textarea::placeholder { color: rgba(255,255,255,.4); }
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent-400);
  background: rgba(255,255,255,.1);
}
.form-row select option { color: var(--neutral-800); }
.form-row textarea { resize: vertical; }
.form-success {
  margin-top: 16px;
  padding: 14px;
  background: rgba(45,134,89,.2);
  border: 1px solid var(--success);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: .9rem;
  text-align: center;
}
.contacto-form .btn-primary { background: var(--accent-500); }
.contacto-form .btn-primary:hover { background: var(--accent-600); }

/* ===== FOOTER ===== */
.site-footer {
  background: var(--neutral-900);
  color: rgba(255,255,255,.6);
  padding: 48px 0;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand strong { color: #fff; font-size: 1.1rem; }
.footer-brand p { font-size: .85rem; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { font-size: .88rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--accent-400); }
.footer-copy p { font-size: .82rem; text-align: right; }
.footer-copy p + p { margin-top: 4px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .nosotros-grid { grid-template-columns: 1fr; gap: 32px; }
  .contacto-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 20px; }
}

@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: var(--surface);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateY(-120%);
    transition: transform var(--transition);
  }
  .main-nav.open { transform: translateY(0); }
  .menu-toggle { display: flex; }
  .menu-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .menu-toggle.open span:nth-child(2) { opacity: 0; }
  .menu-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(7px, -7px); }
}

@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .hero { padding: 120px 0 60px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .casos-grid { grid-template-columns: 1fr; }
  .modal-body { padding: 28px 20px; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-copy p { text-align: center; }
  .footer-links { justify-content: center; }
}