/* ============================================================
   PLUG GROUP — DESIGN SYSTEM
   Versión: 1.0 | 2026
   Uso: Enlazar desde cualquier landing de servicios o página
        principal. Variables en :root para personalización por
        sección sin romper consistencia global.
   ============================================================ */

/* ------------------------------------------------------------
   1. TOKENS / VARIABLES
   ------------------------------------------------------------ */
:root {
  /* Colores primarios */
  --color-charcoal:   #323232;
  --color-navy:       #1B2A4A;
  --color-teal:       #0D4F4F;
  --color-graphite:   #4A4A4A;

  /* Neutros */
  --color-black:      #111111;
  --color-white:      #FFFFFF;
  --color-off-white:  #F4F4F2;
  --color-mid-gray:   #888888;
  --color-border:     rgba(255,255,255,0.1);

  /* Semánticos */
  --color-bg-dark:    var(--color-black);
  --color-bg-section: var(--color-charcoal);
  --color-bg-alt:     var(--color-navy);
  --color-accent:     var(--color-white);
  --color-text:       var(--color-white);
  --color-text-muted: var(--color-mid-gray);

  /* Tipografía */
  --font-heading: 'Gabarito', 'Montserrat', sans-serif;
  --font-body:    'Poppins', sans-serif;

  --fs-xs:   0.75rem;   /* 12px */
  --fs-sm:   0.875rem;  /* 14px */
  --fs-base: 1rem;      /* 16px */
  --fs-md:   1.125rem;  /* 18px */
  --fs-lg:   1.375rem;  /* 22px */
  --fs-xl:   1.75rem;   /* 28px */
  --fs-2xl:  2.25rem;   /* 36px */
  --fs-3xl:  3rem;      /* 48px */
  --fs-4xl:  3.75rem;   /* 60px */

  --fw-regular: 400;
  --fw-medium:  500;
  --fw-semibold:600;
  --fw-bold:    700;

  --lh-tight:  1.15;
  --lh-normal: 1.5;
  --lh-loose:  1.75;

  /* Espaciado */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --max-width:       1200px;
  --max-width-text:  720px;
  --gutter:          clamp(1.5rem, 5vw, 3rem);

  /* Bordes */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* Sombras */
  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-btn:  0 2px 12px rgba(13,79,79,0.4);

  /* Transiciones */
  --transition-fast:   150ms ease;
  --transition-normal: 280ms ease;
  --transition-slow:   450ms ease;

  /* Nav */
  --nav-height: 72px;
}

/* ------------------------------------------------------------
   2. RESET Y BASE
   ------------------------------------------------------------ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  line-height: var(--lh-normal);
  color: var(--color-text);
  background-color: var(--color-bg-dark);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, video, iframe {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

::selection {
  background-color: #262626;
  color: #ffffff;
}

/* ------------------------------------------------------------
   3. TIPOGRAFÍA
   ------------------------------------------------------------ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  color: var(--color-white);
}

h1 { font-size: clamp(var(--fs-2xl), 5vw, var(--fs-4xl)); }
h2 { font-size: clamp(var(--fs-xl),  4vw, var(--fs-3xl)); }
h3 { font-size: clamp(var(--fs-lg),  3vw, var(--fs-2xl)); }
h4 { font-size: var(--fs-lg); }

p {
  color: var(--color-text-muted);
  line-height: var(--lh-loose);
  max-width: 65ch;
}

.text-center { text-align: center; }
.text-center p { margin-inline: auto; }

.label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section-title {
  margin-bottom: var(--space-4);
}

.section-intro {
  font-size: var(--fs-md);
  margin-bottom: var(--space-12);
}

/* ------------------------------------------------------------
   4. LAYOUT — CONTENEDOR Y GRILLAS
   ------------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.section--dark  { background-color: var(--color-bg-dark); }
.section--mid   { background-color: var(--color-bg-section); }
.section--navy  { background-color: var(--color-bg-alt); }
.section--teal  { background-color: var(--color-teal); }

/* Grid genérico */
.grid {
  display: grid;
  gap: var(--space-8);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid--4,
  .grid--3,
  .grid--2 { grid-template-columns: 1fr; }
}

/* Flex utilitarios */
.flex          { display: flex; }
.flex-center   { display: flex; align-items: center; justify-content: center; }
.flex-between  { display: flex; align-items: center; justify-content: space-between; }
.flex-col      { flex-direction: column; }
.gap-4         { gap: var(--space-4); }
.gap-6         { gap: var(--space-6); }
.gap-8         { gap: var(--space-8); }

/* ------------------------------------------------------------
   5. COMPONENTES — BOTONES
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background-color: var(--color-teal);
  color: var(--color-white);
  box-shadow: var(--shadow-btn);
}
.btn--primary:hover { background-color: #0f5f5f; }

.btn--outline {
  background-color: transparent;
  color: var(--color-white);
  border: 1.5px solid var(--color-white);
}
.btn--outline:hover {
  background-color: rgba(255,255,255,0.08);
}

.btn--whatsapp {
  background-color: #25D366;
  color: var(--color-white);
}
.btn--whatsapp:hover { background-color: #1ebe5a; }

.btn--lg {
  padding: var(--space-4) var(--space-10);
  font-size: var(--fs-base);
}

/* Ícono SVG dentro de btn */
.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ------------------------------------------------------------
   6. COMPONENTES — NAVBAR
   ------------------------------------------------------------ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: rgba(17,17,17,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-normal);
}

.navbar__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__logo img {
  height: 65px;
  width: auto;
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.navbar__link {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}
.navbar__link:hover { color: var(--color-white); }

.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}
.navbar__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

@media (max-width: 768px) {
  .navbar__nav {
    position: fixed;
    inset: var(--nav-height) 0 0 0;
    flex-direction: column;
    justify-content: flex-start;
    padding-top: var(--space-8);
    gap: var(--space-6);
    background-color: #111111;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
  }
  .navbar__nav.is-open { transform: translateX(0); }
  .navbar__toggle { display: flex; }
  .navbar__link { font-size: var(--fs-md); }
}

/* ------------------------------------------------------------
   7. COMPONENTES — HERO
   ------------------------------------------------------------ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-height);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-color: var(--color-black);
  z-index: 0;
}

/* Placeholder de imagen de fondo */
.hero__bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
  z-index: 1;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(17,17,17,0.85) 0%,
    rgba(27,42,74,0.6) 60%,
    rgba(13,79,79,0.3) 100%
  );
  z-index: 2;
}

.hero__content {
  position: relative;
  z-index: 3;
  max-width: 780px;
}

.hero__label {
  margin-bottom: var(--space-4);
}

.hero__title {
  margin-bottom: var(--space-6);
}

.hero__subtitle {
  font-size: clamp(var(--fs-base), 2vw, var(--fs-lg));
  color: rgba(255,255,255,0.7);
  margin-bottom: var(--space-10);
  max-width: 56ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: bounceY 2s infinite;
}

@keyframes bounceY {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* ------------------------------------------------------------
   8. COMPONENTES — CARDS
   ------------------------------------------------------------ */
.card {
  background-color: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-8);
  transition: background-color var(--transition-normal),
              border-color var(--transition-normal),
              transform var(--transition-normal);
}

.card:hover {
  background-color: rgba(255,255,255,0.07);
  border-color: rgba(13,79,79,0.5);
  transform: translateY(-3px);
}

.card__icon {
  width: 48px;
  height: 48px;
  background-color: rgba(255,255,255,0.25);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
}

.card__icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-white);
  fill: none;
}

.card__title {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-3);
}

.card__text {
  font-size: var(--fs-sm);
  line-height: var(--lh-loose);
}

.card__list {
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.card__list li {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-4);
  position: relative;
}

.card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-teal);
}

/* ------------------------------------------------------------
   9. COMPONENTES — CLIENTES / LOGOS
   ------------------------------------------------------------ */
.logos-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  align-items: center;
  justify-content: center;
}

.logo-item {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.55;
  transition: opacity var(--transition-fast);
  filter: grayscale(100%) brightness(2);
}

.logo-item:hover { opacity: 1; }

.logo-item img {
  max-height: 44px;
  width: auto;
  object-fit: contain;
}

/* ------------------------------------------------------------
   10. COMPONENTES — VIDEO EMBED
   ------------------------------------------------------------ */
.video-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  background-color: #000;
}

.video-wrapper iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* ------------------------------------------------------------
   11. COMPONENTES — STATS / NÚMEROS
   ------------------------------------------------------------ */
.stat {
  text-align: center;
  padding: var(--space-6);
}

.stat__number {
  font-family: var(--font-heading);
  font-size: clamp(var(--fs-2xl), 4vw, var(--fs-4xl));
  font-weight: var(--fw-bold);
  color: var(--color-white);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat__number span {
  color: var(--color-white);
}

.stat__label {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ------------------------------------------------------------
   12. COMPONENTES — PROCESO / STEPS
   ------------------------------------------------------------ */
.steps {
  display: grid;
  gap: 0;
  position: relative;
}

.step {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: var(--space-6);
  padding-bottom: var(--space-10);
}

.step:last-child { padding-bottom: 0; }

.step__number {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}

.step__circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--color-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: var(--fw-bold);
  font-size: var(--fs-md);
  color: var(--color-teal);
  background-color: rgba(13,79,79,0.1);
  flex-shrink: 0;
}

.step__line {
  flex: 1;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-teal), transparent);
  margin-top: var(--space-2);
}

.step__body { padding-top: var(--space-2); }
.step__title { font-size: var(--fs-md); margin-bottom: var(--space-2); }
.step__text { font-size: var(--fs-sm); }

/* ------------------------------------------------------------
   13. COMPONENTES — CONTACT / CTA SECTION
   ------------------------------------------------------------ */
.cta-box {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-teal) 100%);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-12), 6vw, var(--space-20));
  text-align: center;
}

.cta-box h2 { margin-bottom: var(--space-4); }
.cta-box p  { margin-inline: auto; margin-bottom: var(--space-8); }

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}

/* Formulario de contacto */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-bottom: 1rem;
}

.form-label {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: rgba(255,255,255,0.8);
}

.form-input,
.form-select,
.form-textarea {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  color: var(--color-white);
  background-color: rgba(255,255,255,0.06);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  transition: border-color var(--transition-fast),
              background-color var(--transition-fast);
  width: 100%;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-teal);
  background-color: rgba(255,255,255,0.09);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: rgba(255,255,255,0.3);
}

.form-textarea { resize: vertical; min-height: 120px; }

.form-select option { background-color: var(--color-charcoal); }

/* ------------------------------------------------------------
   14. COMPONENTES — FOOTER
   ------------------------------------------------------------ */
.footer {
  background-color: var(--color-black);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-12) var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer__logo { height: 32px; width: auto; margin-bottom: var(--space-4); }

.footer__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-loose);
  margin-bottom: 10px;
}

.footer__heading {
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  font-weight: var(--fw-semibold);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__links a {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}
.footer__links a:hover { color: var(--color-white); }

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

@media (max-width: 900px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .footer__grid { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; text-align: center; }
}

/* ------------------------------------------------------------
   15. COMPONENTES — DIVIDER / SEPARADORES
   ------------------------------------------------------------ */
.divider {
  width: 48px;
  height: 3px;
  background-color: var(--color-teal);
  border-radius: 2px;
  margin-block: var(--space-4) var(--space-6);
}

.divider--center { margin-inline: auto; }

/* ------------------------------------------------------------
   16. UTILIDADES
   ------------------------------------------------------------ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

.mt-4  { margin-top: var(--space-4);  }
.mt-8  { margin-top: var(--space-8);  }
.mt-12 { margin-top: var(--space-12); }
.mb-4  { margin-bottom: var(--space-4);  }
.mb-8  { margin-bottom: var(--space-8);  }

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

/* Placeholder de imagen genérico */
.img-placeholder {
  background-color: rgba(255,255,255,0.05);
  border: 1px dashed rgba(255,255,255,0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  min-height: 240px;
}

/* Animación de entrada */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ------------------------------------------------------------
   16. ACCESIBILIDAD
   ------------------------------------------------------------ */
:focus-visible {
  outline: 2px solid var(--color-teal);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* -----------------------------------------------------------
   17. ALERT FORMULARY
  ------------------------------------------------------------ */
  .form-feedback { display: none; padding: var(--space-4); border-radius: var(--radius-md); font-size: var(--fs-sm); margin-top: var(--space-4); }
.form-feedback--ok { display: block; background: rgba(13,79,79,0.15); border: 1px solid rgba(13,79,79,0.4); color: #ffffff; }
.form-feedback--error { display: block; background: rgba(217,4,41,0.1); border: 1px solid rgba(217,4,41,0.3); color: #ff6b6b; }
.spin { animation: spin 1s linear infinite; }
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }