/* ===========================================================================
   COFSA  Design System
   Style: Minimalism + Trust & Authority
   Palette: Navy / Blue / Slate Grays / White / Black
   =========================================================================== */

:root {
  /* Color tokens */
  --primary: #1E3A5F;
  --primary-600: #15293F;
  --primary-700: #0F1F31;
  --accent: #2563EB;
  --accent-600: #1D4ED8;
  --whatsapp: #25D366;
  --whatsapp-600: #1FB957;

  --bg: #FFFFFF;
  --bg-alt: #F6F8FB;
  --bg-soft: #EEF2F8;
  --fg: #0F172A;
  --fg-muted: #475569;
  --fg-subtle: #64748B;
  --border: #E2E8F0;
  --border-strong: #CBD5E1;
  --card: #FFFFFF;
  --success: #059669;
  --danger: #DC2626;
  --ring: rgba(37, 99, 235, 0.35);

  /* Type scale */
  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-16: 1rem;
  --fs-18: 1.125rem;
  --fs-20: 1.25rem;
  --fs-24: 1.5rem;
  --fs-30: 1.875rem;
  --fs-36: 2.25rem;
  --fs-48: 3rem;
  --fs-60: 3.75rem;

  /* Spacing (4/8 system) */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sp-12: 48px;
  --sp-16: 64px;
  --sp-20: 80px;
  --sp-24: 96px;

  /* Radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;
  --r-2xl: 28px;
  --r-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 24px 48px -16px rgba(15, 23, 42, 0.18), 0 4px 12px rgba(15, 23, 42, 0.06);

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast: 150ms;
  --dur-base: 220ms;
  --dur-slow: 320ms;

  /* Layout */
  --container: 1200px;
  --header-h: 96px;
}

/* ===========================================================================
   Reset & base
   =========================================================================== */
*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: var(--fs-16);
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; margin: 0; }
h1, h2, h3, h4 { margin: 0; color: var(--fg); letter-spacing: -0.02em; font-weight: 700; line-height: 1.2; }
p  { margin: 0; }
input, select, textarea { font: inherit; color: inherit; }

:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--primary);
  color: #fff;
  padding: var(--sp-3) var(--sp-4);
  z-index: 1000;
  border-radius: 0 0 var(--r-md) 0;
}
.skip-link:focus { left: 0; }

/* ===========================================================================
   Layout helpers
   =========================================================================== */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: clamp(20px, 5vw, 32px);
}

.section { padding-block: clamp(56px, 9vw, 96px); }
.section-alt { background: var(--bg-alt); }

.section-head {
  max-width: 720px;
  margin: 0 auto var(--sp-12);
  text-align: center;
}
.section-head h2 {
  font-size: clamp(1.75rem, 3.4vw, 2.25rem);
  margin-top: var(--sp-3);
}
.section-sub {
  color: var(--fg-muted);
  margin-top: var(--sp-3);
  font-size: var(--fs-18);
}

/* ===========================================================================
   Typography utilities
   =========================================================================== */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-12);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
}
.eyebrow-dot {
  width: 6px; height: 6px; border-radius: var(--r-full);
  background: var(--accent);
}

.display {
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-block: var(--sp-4) var(--sp-5);
}
.display-accent { color: var(--accent); }

.lead {
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  color: var(--fg-muted);
  max-width: 56ch;
}

/* ===========================================================================
   Buttons
   =========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 14px 22px;
  border-radius: var(--r-full);
  font-weight: 600;
  font-size: var(--fs-16);
  border: 1px solid transparent;
  transition: background var(--dur-base) var(--ease),
              color var(--dur-base) var(--ease),
              transform var(--dur-fast) var(--ease),
              box-shadow var(--dur-base) var(--ease),
              border-color var(--dur-base) var(--ease);
  min-height: 44px;
  white-space: nowrap;
  touch-action: manipulation;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-600); }

.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border-strong);
}
.btn-ghost:hover { background: var(--bg-soft); border-color: var(--primary); }

.btn-whatsapp {
  background: var(--whatsapp);
  color: #fff;
}
.btn-whatsapp:hover { background: var(--whatsapp-600); }

.btn-sm { padding: 10px 16px; font-size: var(--fs-14); min-height: 38px; }
.btn-block { width: 100%; }

/* ===========================================================================
   Header
   =========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  color: var(--fg);
  min-width: 0;
}
.brand-logo {
  display: block;
  height: 76px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
}
.brand-fallback {
  display: none;
  align-items: center;
  gap: var(--sp-3);
  min-width: 0;
}
.brand-mark { flex: none; }
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  min-width: 0;
}
.brand-name {
  font-weight: 800;
  font-size: var(--fs-20);
  letter-spacing: 0.08em;
  color: var(--primary);
}
.brand-tag {
  font-size: var(--fs-12);
  color: var(--fg-subtle);
  letter-spacing: 0.02em;
  max-width: 26ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 480px) {
  .brand-logo { height: 56px; }
  .brand-tag { display: none; }
}

/* Footer logo */
.footer-logo {
  display: block;
  height: 96px;
  width: auto;
  max-width: 100%;
  background: #FFFFFF;
  padding: 8px 14px;
  border-radius: var(--r-md);
}

.primary-nav { display: flex; align-items: center; }
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  color: var(--fg);
}
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.nav-menu a {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: var(--r-md);
  font-weight: 500;
  font-size: var(--fs-14);
  color: var(--fg-muted);
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.nav-menu a:hover { color: var(--fg); background: var(--bg-soft); }
.nav-menu .nav-cta { color: #fff; }
.nav-menu .nav-cta:hover { color: #fff; }

/* ===========================================================================
   Hero
   =========================================================================== */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(56px, 9vw, 112px) clamp(40px, 7vw, 96px);
  background:
    radial-gradient(900px 480px at 88% -10%, rgba(37, 99, 235, 0.10), transparent 60%),
    radial-gradient(700px 420px at 0% 100%, rgba(30, 58, 95, 0.07), transparent 60%),
    var(--bg);
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.5), transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.5), transparent 70%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(40px, 6vw, 72px);
  align-items: center;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-8);
}

.hero-trust {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-4);
  margin-top: var(--sp-10);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--border);
}
.hero-trust li { display: flex; flex-direction: column; gap: 2px; }
.hero-trust strong {
  font-size: clamp(1.5rem, 3.2vw, 1.875rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--primary);
}
.hero-trust span {
  font-size: var(--fs-12);
  color: var(--fg-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Hero visual */
.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 320px;
}
.hero-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--sp-6);
  width: 100%;
  max-width: 380px;
}
.hero-card-main {
  position: relative;
  z-index: 2;
}
.hero-card-header {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--sp-4);
}
.hero-card-dot {
  width: 9px; height: 9px; border-radius: var(--r-full);
  background: var(--border-strong);
}
.hero-card-dot:first-child { background: #F87171; }
.hero-card-dot:nth-child(2) { background: #FBBF24; }
.hero-card-dot:nth-child(3) { background: #34D399; }
.hero-card-title {
  margin-left: auto;
  font-size: var(--fs-14);
  font-weight: 600;
  color: var(--fg-muted);
}
.hero-card-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: var(--sp-3);
  color: var(--fg-muted);
  font-size: var(--fs-14);
}
.hero-card-row strong {
  font-variant-numeric: tabular-nums;
  color: var(--fg);
  font-weight: 600;
}
.hero-card-row-total {
  border-top: 1px dashed var(--border);
  margin-top: var(--sp-2);
  padding-top: var(--sp-4);
  font-size: var(--fs-16);
}
.hero-card-row-total strong { font-size: var(--fs-18); color: var(--primary); }
.hero-card-status {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
  padding: 8px 12px;
  background: rgba(5, 150, 105, 0.1);
  color: var(--success);
  font-size: var(--fs-14);
  font-weight: 600;
  border-radius: var(--r-full);
}

.hero-card-mini {
  position: absolute;
  left: 50%;
  bottom: -8px;
  transform: translateX(calc(-50% - 140px));
  width: 200px;
  z-index: 1;
}
.hero-card-mini-label {
  font-size: var(--fs-12);
  color: var(--fg-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.hero-card-mini-value {
  font-size: var(--fs-30);
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  margin-top: var(--sp-1);
}
.hero-card-mini-value span { font-size: var(--fs-18); color: var(--fg-muted); margin-left: 2px; }
.hero-card-mini-bar {
  margin-top: var(--sp-3);
  height: 6px;
  background: var(--bg-soft);
  border-radius: var(--r-full);
  overflow: hidden;
}
.hero-card-mini-bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: var(--r-full);
}

/* ===========================================================================
   Grids: Services
   =========================================================================== */
.grid {
  display: grid;
  gap: var(--sp-5);
}
.services {
  grid-template-columns: 1fr;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: var(--sp-8);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-base) var(--ease),
              box-shadow var(--dur-base) var(--ease),
              border-color var(--dur-base) var(--ease);
}

.service { display: flex; flex-direction: column; gap: var(--sp-3); }
.service:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}
.service h3 { font-size: var(--fs-20); }
.service p { color: var(--fg-muted); font-size: var(--fs-16); }

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: var(--r-md);
  background: var(--bg-soft);
  color: var(--primary);
  margin-bottom: var(--sp-2);
}

/* ===========================================================================
   Two-column sections (Nosotros / Contacto)
   =========================================================================== */
.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: start;
}
.two-col h2 {
  font-size: clamp(1.75rem, 3.4vw, 2.25rem);
  margin-top: var(--sp-3);
}
.two-col-copy p, .contact-info > p { color: var(--fg-muted); margin-top: var(--sp-4); }

.features {
  display: grid;
  gap: var(--sp-5);
}
.features li {
  display: flex;
  gap: var(--sp-4);
  align-items: flex-start;
}
.features h3 { font-size: var(--fs-18); }
.features p { color: var(--fg-muted); margin-top: var(--sp-1); }
.feature-icon {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: var(--r-md);
  background: #fff;
  border: 1px solid var(--border);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* ===========================================================================
   Contact
   =========================================================================== */
.contact-list {
  display: grid;
  gap: var(--sp-4);
  margin-block: var(--sp-8) var(--sp-6);
}
.contact-list li {
  display: flex;
  gap: var(--sp-4);
  align-items: center;
}
.contact-icon {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: var(--r-md);
  background: var(--bg-soft);
  color: var(--primary);
}
.contact-label {
  display: block;
  font-size: var(--fs-12);
  color: var(--fg-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 2px;
}
.contact-list a { color: var(--fg); font-weight: 500; }
.contact-list a:hover { color: var(--accent); }

.contact-form {
  padding: clamp(24px, 4vw, 36px);
  display: grid;
  gap: var(--sp-4);
}
.form-row { display: grid; gap: var(--sp-2); }
.form-row label {
  font-size: var(--fs-14);
  font-weight: 600;
  color: var(--fg);
}
.req { color: var(--danger); }

.form-row input,
.form-row select,
.form-row textarea {
  background: #fff;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  padding: 12px 14px;
  font-size: var(--fs-16);
  min-height: 44px;
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.form-row textarea { min-height: 120px; resize: vertical; }
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--ring);
}
.form-row input[aria-invalid="true"],
.form-row textarea[aria-invalid="true"] {
  border-color: var(--danger);
}
.error {
  color: var(--danger);
  font-size: var(--fs-14);
  min-height: 1em;
}
.form-note {
  font-size: var(--fs-12);
  color: var(--fg-subtle);
  text-align: center;
}

/* ===========================================================================
   Footer
   =========================================================================== */
.site-footer {
  background: var(--primary);
  color: #CBD5E1;
  padding-block: var(--sp-10);
  margin-top: var(--sp-8);
}
.footer-inner {
  display: grid;
  gap: var(--sp-6);
  align-items: center;
  grid-template-columns: 1fr;
}
.footer-brand { display: flex; gap: var(--sp-3); align-items: center; }
.footer-brand strong {
  color: #fff;
  font-size: var(--fs-18);
  letter-spacing: 0.04em;
  display: block;
}
.footer-brand p { font-size: var(--fs-14); margin-top: 2px; }
.footer-links { display: flex; gap: var(--sp-5); flex-wrap: wrap; }
.footer-links a { font-size: var(--fs-14); color: #CBD5E1; }
.footer-links a:hover { color: #fff; }
.footer-copy { font-size: var(--fs-12); color: #94A3B8; }

/* ===========================================================================
   WhatsApp floating button
   =========================================================================== */
.whatsapp-fab {
  position: fixed;
  right: clamp(16px, 4vw, 24px);
  bottom: clamp(16px, 4vw, 24px);
  width: 56px; height: 56px;
  border-radius: var(--r-full);
  background: var(--whatsapp);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 12px 28px rgba(37, 211, 102, 0.4);
  z-index: 40;
  transition: transform var(--dur-base) var(--ease), background var(--dur-base) var(--ease);
}
.whatsapp-fab:hover { background: var(--whatsapp-600); transform: translateY(-2px); }

/* ===========================================================================
   Responsive
   =========================================================================== */

/* Mobile nav drawer */
@media (max-width: 880px) {
  .nav-menu {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--sp-1);
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: var(--sp-4) clamp(20px, 5vw, 32px) var(--sp-6);
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur-base) var(--ease), transform var(--dur-base) var(--ease), visibility 0s linear var(--dur-base);
  }
  .nav-menu.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity var(--dur-base) var(--ease), transform var(--dur-base) var(--ease);
  }
  .nav-menu a {
    padding: 12px 14px;
    font-size: var(--fs-16);
  }
  .nav-menu .nav-cta { margin-top: var(--sp-2); }
}

@media (min-width: 881px) {
  .nav-toggle { display: none; }
}

/* Tablet */
@media (min-width: 640px) {
  .services { grid-template-columns: repeat(2, 1fr); }
}

/* Desktop */
@media (min-width: 960px) {
  .hero-inner { grid-template-columns: 1.05fr 1fr; }
  .hero-visual { min-height: 460px; }
  .services { grid-template-columns: repeat(3, 1fr); }
  .two-col { grid-template-columns: 1fr 1fr; align-items: center; }
  .two-col-reverse > :first-child { order: 0; }
  .footer-inner {
    grid-template-columns: 1fr auto 1fr;
  }
  .footer-copy { text-align: right; }
}

/* ===========================================================================
   Motion preferences
   =========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}