/* ========================================
   TechZentrix — Global Styles
   ======================================== */

/* --- CSS Variables --- */
:root {
  /* Colors */
  --color-bg-primary: #050508;
  --color-bg-secondary: #0a0a12;
  --color-bg-tertiary: #10101a;
  --color-bg-card: rgba(255, 255, 255, 0.03);
  --color-bg-card-hover: rgba(255, 255, 255, 0.06);
  --color-border: rgba(255, 255, 255, 0.06);
  --color-border-hover: rgba(255, 255, 255, 0.12);

  --color-text-primary: #f0f0f5;
  --color-text-secondary: #94a3b8;
  --color-text-tertiary: #64748b;

  --color-accent: #00d4ff;
  --color-accent-secondary: #7c3aed;
  --color-accent-glow: rgba(0, 212, 255, 0.15);

  --color-whatsapp: #25d366;
  --color-success: #10b981;
  --color-error: #ef4444;

  /* Gradient */
  --gradient-text: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
  --gradient-card: linear-gradient(135deg, rgba(0, 212, 255, 0.08) 0%, rgba(124, 58, 237, 0.08) 100%);
  --gradient-btn: linear-gradient(135deg, #00d4ff 0%, #0891b2 100%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --section-padding: 120px;
  --container-max: 1200px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* --- Reset --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

img {
  max-width: 100%;
  display: block;
}

ul, ol {
  list-style: none;
}

::selection {
  background: var(--color-accent);
  color: var(--color-bg-primary);
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Text Gradient --- */
.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}


/* ========================================
   BUTTONS
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 0.938rem;
  line-height: 1;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn--sm {
  padding: 10px 20px;
  font-size: 0.813rem;
  border-radius: 8px;
}

.btn--lg {
  padding: 18px 32px;
  font-size: 1rem;
}

.btn--primary {
  background: var(--gradient-btn);
  color: var(--color-bg-primary);
  font-weight: 700;
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.3);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn--outline {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-hover);
}

.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

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

.btn--whatsapp:hover {
  background: #1fb855;
  transform: translateY(-1px);
}

.btn--full {
  width: 100%;
}

.btn__icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn__icon--right {
  transition: transform var(--transition-fast);
}

.btn:hover .btn__icon--right {
  transform: translate(3px, -3px);
}


/* ========================================
   NAVBAR
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition-base);
}

.navbar--scrolled {
  background: rgba(5, 5, 8, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
}

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

.navbar__logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.logo-bracket {
  color: var(--color-accent);
  opacity: 0.6;
}

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

.navbar__menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.navbar__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.navbar__link:hover {
  color: var(--color-text-primary);
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.navbar__link:hover::after {
  width: 100%;
}

.navbar__link.active {
  color: var(--color-text-primary);
}

.navbar__link.active::after {
  width: 100%;
}

.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.navbar__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.navbar__toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar__toggle.active span:nth-child(2) {
  opacity: 0;
}

.navbar__toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}


/* ========================================
   HERO
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 50% at 50% 50%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 50% at 50% 50%, black 40%, transparent 100%);
}

.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
}

.hero__glow--1 {
  width: 600px;
  height: 600px;
  background: var(--color-accent);
  top: -200px;
  right: -100px;
  opacity: 0.08;
}

.hero__glow--2 {
  width: 500px;
  height: 500px;
  background: var(--color-accent-secondary);
  bottom: -200px;
  left: -100px;
  opacity: 0.06;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.813rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero__title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 640px;
}

.hero__ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.hero__stats {
  display: flex;
  align-items: center;
  gap: 32px;
  padding-top: 40px;
  border-top: 1px solid var(--color-border);
}

.hero__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero__stat-number {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
}

.hero__stat-label {
  font-size: 0.813rem;
  color: var(--color-text-tertiary);
  font-weight: 500;
}

.hero__stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}


/* ========================================
   SECTION COMMON
   ======================================== */
.section {
  padding: var(--section-padding) 0;
  position: relative;
}

.section__header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.section__title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.section__desc {
  font-size: 1.063rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}


/* ========================================
   PROBLEMAS
   ======================================== */
.problemas {
  background: var(--color-bg-secondary);
}

.problemas__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.problema-card {
  padding: 36px 32px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.problema-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-error), #f97316);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.problema-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
}

.problema-card:hover::before {
  opacity: 1;
}

.problema-card__icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(239, 68, 68, 0.08);
  border-radius: 14px;
  margin-bottom: 20px;
}

.problema-card__icon svg {
  width: 26px;
  height: 26px;
  color: var(--color-error);
}

.problema-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.problema-card__text {
  font-size: 0.938rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}


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

.servicios__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

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

.servicio-card {
  padding: 40px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.servicio-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-text);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.servicio-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
}

.servicio-card:hover::before {
  opacity: 1;
}

.servicio-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-card);
  border-radius: 14px;
  margin-bottom: 20px;
}

.servicio-card__icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-accent);
}

.servicio-card__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.688rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  background: rgba(0, 212, 255, 0.08);
  padding: 4px 12px;
  border-radius: 6px;
  margin-bottom: 16px;
}

.servicio-card__title {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.servicio-card__text {
  font-size: 0.938rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
}


/* ========================================
   DIFERENCIAL
   ======================================== */
.diferencial {
  background: var(--color-bg-secondary);
}

.diferencial__grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.diferencial__item {
  display: flex;
  gap: 32px;
  padding: 40px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  transition: all var(--transition-base);
}

.diferencial__item:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
  transform: translateX(8px);
}

.diferencial__number {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.3;
  flex-shrink: 0;
}

.diferencial__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.diferencial__text {
  font-size: 0.938rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
}


/* ========================================
   CONTACTO
   ======================================== */
.contacto {
  background: var(--color-bg-primary);
}

.contacto__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contacto__info .section__tag {
  text-align: left;
}

.contacto__info .section__title {
  text-align: left;
}

.contacto__desc {
  font-size: 1.063rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

.contacto__details {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contacto__detail {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.938rem;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.contacto__detail:hover {
  color: var(--color-accent);
}

.contacto__detail svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--color-accent);
}

/* Form */
.contacto__form-wrapper {
  padding: 40px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 20px;
}

.contacto__form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.813rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--font-primary);
  font-size: 0.938rem;
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 14px 16px;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-tertiary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.form-group select {
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

.form-group select option {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}


/* ========================================
   FOOTER
   ======================================== */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer__tagline {
  font-size: 0.813rem;
  color: var(--color-text-tertiary);
  margin-top: 8px;
}

.footer__links {
  display: flex;
  gap: 24px;
}

.footer__links a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--color-accent);
}

.footer__copy {
  width: 100%;
  text-align: center;
  padding-top: 24px;
  margin-top: 16px;
  border-top: 1px solid var(--color-border);
}

.footer__copy p {
  font-size: 0.813rem;
  color: var(--color-text-tertiary);
}

.footer__copy a {
  color: var(--color-accent);
}


/* ========================================
   WHATSAPP FLOAT
   ======================================== */
.whatsapp-float {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 999;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-whatsapp);
  border-radius: 50%;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  transition: all var(--transition-base);
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5);
}

.whatsapp-float svg {
  width: 28px;
  height: 28px;
  color: #fff;
}


/* ========================================
   ANIMATIONS
   ======================================== */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate="fade-down"] {
  transform: translateY(-30px);
}

[data-animate="fade-right"] {
  transform: translateX(-40px);
}

[data-animate="fade-left"] {
  transform: translateX(40px);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translate(0, 0);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}


/* ========================================
   RESPONSIVE
   ======================================== */

/* Tablet */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px;
  }

  .problemas__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .servicios__grid {
    grid-template-columns: 1fr;
  }

  .servicios__grid--3 {
    grid-template-columns: 1fr;
  }

  .contacto__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --section-padding: 64px;
  }

  .navbar__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: rgba(10, 10, 18, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 100px 32px 32px;
    gap: 24px;
    transition: right var(--transition-base);
    border-left: 1px solid var(--color-border);
  }

  .navbar__menu.active {
    right: 0;
  }

  .navbar__toggle {
    display: flex;
  }

  .hero {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .hero__title {
    font-size: clamp(2rem, 8vw, 2.75rem);
  }

  .hero__ctas {
    flex-direction: column;
  }

  .hero__ctas .btn {
    width: 100%;
    justify-content: center;
  }

  .hero__stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  .hero__stat-divider {
    width: 40px;
    height: 1px;
  }

  .servicio-card {
    padding: 28px;
  }

  .problema-card {
    padding: 28px 24px;
  }

  .diferencial__item {
    flex-direction: column;
    gap: 16px;
    padding: 28px;
  }

  .diferencial__number {
    font-size: 2rem;
  }

  .contacto__form-wrapper {
    padding: 24px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .footer__links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .whatsapp-float {
    bottom: 20px;
    right: 20px;
    width: 52px;
    height: 52px;
  }

  .whatsapp-float svg {
    width: 24px;
    height: 24px;
  }
}

/* Small mobile */
@media (max-width: 400px) {
  .container {
    padding: 0 16px;
  }

  .hero__title {
    font-size: 1.75rem;
  }

  .section__title {
    font-size: 1.5rem;
  }
}


/* ========================================
   ACCESSIBILITY
   ======================================== */

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  padding: 12px 24px;
  background: var(--color-accent);
  color: var(--color-bg-primary);
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: 0 0 8px 8px;
  z-index: 9999;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 0;
}

/* Focus-visible for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Reduced motion preference */
@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;
  }

  [data-animate] {
    opacity: 1;
    transform: none;
  }
}