/* ==========================================================================
   TechExpress - High-Agency Design System & Styles (Clean & Unified)
   ========================================================================== */

/* ==========================================================================
   1. Global Variables & Theme Palettes
   ========================================================================== */
:root {
  /* Default: Cyberpunk Cyan Theme */
  --bg-primary: #070913;
  --bg-secondary: #0d1122;
  --bg-tertiary: #131930;
  --bg-card: rgba(19, 25, 48, 0.75);
  --bg-card-hover: rgba(26, 35, 68, 0.9);
  --bg-glass: rgba(13, 17, 34, 0.65);
  
  --accent-primary: #00d4ff;
  --accent-secondary: #00ff88;
  --accent-gradient: linear-gradient(135deg, #00d4ff 0%, #00ff88 100%);
  --accent-glow: 0 0 25px rgba(0, 212, 255, 0.35);
  --accent-glow-subtle: 0 0 15px rgba(0, 212, 255, 0.15);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-hover: rgba(0, 212, 255, 0.35);
  --border-color: rgba(255, 255, 255, 0.08);
  
  --glass-shadow: 0 12px 36px 0 rgba(0, 0, 0, 0.45);
  --glass-inset-refract: inset 0 1px 0 rgba(255, 255, 255, 0.12);

  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Geist Mono', monospace;

  /* Spacing Scale */
  --sp-4: 4px;
  --sp-8: 8px;
  --sp-12: 12px;
  --sp-16: 16px;
  --sp-24: 24px;
  --sp-32: 32px;
  --sp-48: 48px;
  --sp-64: 64px;
  --sp-80: 80px;
  --sp-96: 96px;
}

/* Theme: Cyberpunk Cyan */
html[data-theme="cyberpunk"], html:not([data-theme]) {
  --bg-primary: #070913;
  --bg-secondary: #0d1122;
  --bg-tertiary: #131930;
  --bg-card: rgba(19, 25, 48, 0.75);
  --bg-card-hover: rgba(26, 35, 68, 0.9);
  --accent-primary: #00d4ff;
  --accent-secondary: #00ff88;
  --accent-gradient: linear-gradient(135deg, #00d4ff 0%, #00ff88 100%);
  --accent-glow: 0 0 25px rgba(0, 212, 255, 0.35);
  --border-glass-hover: rgba(0, 212, 255, 0.35);
}

/* Theme: Deep Violet (AI Mesh) */
html[data-theme="violet"] {
  --bg-primary: #0a0b16;
  --bg-secondary: #101226;
  --bg-tertiary: #181b3a;
  --bg-card: rgba(24, 27, 58, 0.75);
  --bg-card-hover: rgba(33, 37, 78, 0.9);
  --accent-primary: #a855f7;
  --accent-secondary: #3b82f6;
  --accent-gradient: linear-gradient(135deg, #a855f7 0%, #3b82f6 100%);
  --accent-glow: 0 0 25px rgba(168, 85, 247, 0.35);
  --border-glass-hover: rgba(168, 85, 247, 0.35);
}

/* Theme: Neon Emerald */
html[data-theme="emerald"] {
  --bg-primary: #05120e;
  --bg-secondary: #0a1f18;
  --bg-tertiary: #112e24;
  --bg-card: rgba(17, 46, 36, 0.75);
  --bg-card-hover: rgba(23, 62, 49, 0.9);
  --accent-primary: #10b981;
  --accent-secondary: #84cc16;
  --accent-gradient: linear-gradient(135deg, #10b981 0%, #84cc16 100%);
  --accent-glow: 0 0 25px rgba(16, 185, 129, 0.35);
  --border-glass-hover: rgba(16, 185, 129, 0.35);
}

/* Theme: Monochrome Silver */
html[data-theme="monochrome"] {
  --bg-primary: #050505;
  --bg-secondary: #111111;
  --bg-tertiary: #1a1a1a;
  --bg-card: rgba(26, 26, 26, 0.75);
  --bg-card-hover: rgba(38, 38, 38, 0.9);
  --accent-primary: #f1f5f9;
  --accent-secondary: #cbd5e1;
  --accent-gradient: linear-gradient(135deg, #ffffff 0%, #94a3b8 100%);
  --accent-glow: 0 0 25px rgba(255, 255, 255, 0.25);
  --border-glass-hover: rgba(255, 255, 255, 0.35);
}

/* Fonts */
html[data-font="jakarta"], html:not([data-font]) {
  --font-main: 'Plus Jakarta Sans', sans-serif;
}
html[data-font="inter"] {
  --font-main: 'Inter', sans-serif;
}
html[data-font="outfit"] {
  --font-main: 'Outfit', sans-serif;
}

/* ==========================================================================
   2. Reset & Global Base
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.15;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

ul {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

::selection {
  background: var(--accent-primary);
  color: #000;
}

.ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  background: 
    radial-gradient(circle at 15% 15%, rgba(0, 212, 255, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 85% 65%, rgba(0, 255, 136, 0.03) 0%, transparent 45%);
}

/* ==========================================================================
   3. Container & Utility Classes
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}

@media (min-width: 1024px) {
  .container {
    padding: 0 40px;
  }
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

.glass-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-primary);
  box-shadow: var(--glass-inset-refract);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-secondary);
  box-shadow: 0 0 10px var(--accent-secondary);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(0, 255, 136, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 255, 136, 0); }
}

/* ==========================================================================
   4. Buttons
   ========================================================================== */
.btn-primary {
  background: var(--accent-gradient);
  color: #000;
  padding: 13px 28px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: var(--accent-glow);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 35px rgba(0, 255, 136, 0.45);
  color: #000;
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  padding: 13px 28px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--glass-inset-refract);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-secondary:active {
  transform: scale(0.98);
}

/* ==========================================================================
   5. Header & Navigation
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: transparent;
  padding: var(--sp-16) 0;
  transition: background-color 0.3s ease, padding 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}

.header.scrolled {
  background-color: rgba(7, 9, 19, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  padding: var(--sp-12) 0;
}

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

.logo img {
  height: var(--logo-height, 46px) !important;
  max-height: 52px;
  width: auto;
  object-fit: contain;
  transition: transform 0.3s ease, filter 0.3s ease;
}

.logo:hover img {
  transform: scale(1.03);
  filter: drop-shadow(0 0 12px rgba(0, 212, 255, 0.4));
}

.nav-links {
  display: none;
  gap: var(--sp-24);
  align-items: center;
}

@media (min-width: 1024px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.3px;
  position: relative;
  padding: 6px 2px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-gradient);
  transition: width 0.25s ease;
  border-radius: 2px;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text-primary);
}

.nav-links a:hover::after, .nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  background: var(--accent-gradient);
  color: #000;
  padding: 9px 20px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: var(--accent-glow-subtle);
  display: none;
}

@media (min-width: 1024px) {
  .nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--accent-glow);
  color: #000;
}

.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--text-primary);
}

@media (min-width: 1024px) {
  .mobile-menu-btn {
    display: none;
  }
}

.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  height: 100dvh;
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 3000;
  transition: right 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 30px;
}

.mobile-nav.active {
  right: 0;
}

.mobile-nav-close {
  position: absolute;
  top: 24px;
  right: 24px;
  color: var(--text-primary);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-24);
  width: 100%;
}

.mobile-nav-links a {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.mobile-nav-links a:hover, .mobile-nav-links a.active {
  color: var(--accent-primary);
}

/* ==========================================================================
   6. Hero Section
   ========================================================================== */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  padding-bottom: 60px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-48);
  align-items: center;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 55% 45%;
    gap: var(--sp-64);
  }
}

.hero-title {
  font-size: clamp(2.2rem, 5.5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.1;
  margin-top: var(--sp-16);
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.6;
  max-width: 540px;
  margin-top: var(--sp-20);
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-16);
  margin-top: var(--sp-32);
}

.hero-stats {
  display: flex;
  gap: var(--sp-32);
  margin-top: var(--sp-48);
  flex-wrap: wrap;
  padding-top: var(--sp-24);
  border-top: 1px solid var(--border-glass);
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-top: 6px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-visual {
  position: relative;
}

.hero-image-wrapper {
  position: relative;
  border-radius: 20px;
  overflow: visible;
}

.hero-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 130%;
  height: 130%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.16) 0%, rgba(0, 255, 136, 0.06) 45%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
  pointer-events: none;
  animation: floatSlow 8s ease-in-out infinite;
}

.hero-img {
  position: relative;
  z-index: 1;
  border-radius: 20px;
  border: 1px solid var(--border-glass);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), var(--glass-inset-refract);
  width: 100%;
}

/* Floating Badges */
.floating-badge {
  position: absolute;
  z-index: 2;
  background: rgba(13, 17, 34, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5), var(--glass-inset-refract);
  border-radius: 12px;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  animation: floatBadge 5s ease-in-out infinite;
}

.floating-badge.badge-top {
  top: -15px;
  right: -10px;
}

.floating-badge.badge-bottom {
  bottom: -20px;
  left: -15px;
  animation-delay: 2.5s;
}

.badge-icon-box {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(0, 212, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
}

.badge-text-primary {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
}

.badge-text-sub {
  font-size: 0.72rem;
  color: var(--text-secondary);
}

@keyframes floatSlow {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(-50%, -50%) scale(1.08); }
}

@keyframes floatBadge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ==========================================================================
   7. Services Section
   ========================================================================== */
.services {
  padding: var(--sp-80) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--sp-48);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 800;
  margin-top: var(--sp-12);
  margin-bottom: var(--sp-12);
}

.section-subtitle {
  color: var(--text-secondary);
  max-width: 620px;
  font-size: 1.05rem;
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: var(--sp-32);
}

.filter-tab-btn {
  padding: 8px 18px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-tab-btn:hover, .filter-tab-btn.active {
  background: rgba(0, 212, 255, 0.12);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.2);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-24);
}

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

@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.service-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: 16px;
  padding: var(--sp-32);
  border: 1px solid var(--border-glass);
  box-shadow: var(--glass-shadow), var(--glass-inset-refract);
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.service-card:hover {
  border-color: var(--border-glass-hover);
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4), var(--glass-inset-refract);
}

.service-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(0, 212, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  margin-bottom: var(--sp-20);
  transition: all 0.3s ease;
}

.service-card:hover .service-icon {
  background: var(--accent-gradient);
  color: #000;
  box-shadow: var(--accent-glow);
}

.custom-service-icon {
  width: 30px;
  height: 30px;
  object-fit: contain;
}

.service-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--sp-8);
}

.service-description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* ==========================================================================
   8. Cotizador Interactivo Section
   ========================================================================== */
.estimator-section {
  padding: var(--sp-80) 0;
  position: relative;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
}

.estimator-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-32);
  align-items: start;
}

@media (min-width: 1024px) {
  .estimator-wrapper {
    grid-template-columns: 1.25fr 0.75fr;
    gap: var(--sp-40);
  }
}

.estimator-config-box {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: var(--sp-32);
  box-shadow: var(--glass-shadow), var(--glass-inset-refract);
}

.step-title {
  font-size: 0.92rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-primary);
  margin-bottom: var(--sp-16);
  display: flex;
  align-items: center;
  gap: 8px;
}

.category-selector-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: var(--sp-32);
}

@media (min-width: 640px) {
  .category-selector-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.category-option-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 14px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
}

.category-option-btn svg {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.category-option-btn span {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.category-option-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.2);
}

.category-option-btn.active {
  background: rgba(0, 212, 255, 0.1);
  border-color: var(--accent-primary);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
}

.category-option-btn.active svg {
  color: var(--accent-primary);
}

.category-option-btn.active span {
  color: var(--text-primary);
}

.dynamic-options-panel {
  display: flex;
  flex-direction: column;
  gap: var(--sp-24);
}

.option-group-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.option-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 14px;
}

.selectable-chip {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 14px 16px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 8px;
  min-width: 0;
  overflow: hidden;
  word-break: break-word;
  overflow-wrap: break-word;
  transition: all 0.2s ease;
}

.selectable-chip:hover {
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}

.selectable-chip.active {
  border-color: var(--accent-secondary);
  background: rgba(0, 255, 136, 0.08);
  box-shadow: 0 0 15px rgba(0, 255, 136, 0.2);
}

.chip-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
  word-break: break-word;
  overflow-wrap: break-word;
}

.chip-sub {
  font-size: 0.76rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.slider-control-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 16px;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.slider-val-badge {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-primary);
  background: rgba(0, 212, 255, 0.1);
  padding: 2px 10px;
  border-radius: 6px;
}

.range-input {
  width: 100%;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  outline: none;
  -webkit-appearance: none;
  accent-color: var(--accent-primary);
}

.estimator-summary-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: var(--sp-32);
  box-shadow: var(--glass-shadow), var(--glass-inset-refract);
  position: sticky;
  top: 100px;
}

.summary-header {
  padding-bottom: var(--sp-16);
  border-bottom: 1px solid var(--border-glass);
  margin-bottom: var(--sp-20);
}

.summary-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.summary-main-service {
  font-size: 1.35rem;
  font-weight: 800;
  margin-top: 4px;
}

.summary-breakdown {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: var(--sp-24);
}

.breakdown-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.summary-total-box {
  background: rgba(0, 212, 255, 0.06);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 14px;
  padding: 18px;
  text-align: center;
  margin-bottom: var(--sp-24);
}

.total-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.total-price {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin: 4px 0;
}

.total-timeframe {
  font-size: 0.8rem;
  color: var(--accent-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.summary-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-whatsapp-quote {
  background: #25d366;
  color: #000;
  padding: 13px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.btn-whatsapp-quote:hover {
  background: #20ba59;
  box-shadow: 0 0 20px rgba(37, 211, 102, 0.4);
  color: #000;
}

/* Floating WhatsApp Button */
.whatsapp-floating-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: #25d366;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 25px rgba(37, 211, 102, 0.45);
  z-index: 999;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease;
}

.whatsapp-floating-btn:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: 0 12px 32px rgba(37, 211, 102, 0.6);
  color: #fff;
}

.whatsapp-floating-btn:active {
  transform: scale(0.95);
}

/* ==========================================================================
   9. Ecosistema Tecnológico & Stack (Spacing & Layout Fixed)
   ========================================================================== */
.ecosystem-section {
  padding: var(--sp-80) 0;
  position: relative;
}

.stack-tabs-wrapper {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 10px;
  margin-bottom: 48px; /* Proper separation from cards */
  flex-wrap: wrap;
  position: relative;
  z-index: 5;
}

.stack-tab-btn {
  padding: 10px 22px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.25s ease;
}

.stack-tab-btn:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
}

.stack-tab-btn.active {
  background: rgba(0, 212, 255, 0.12);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

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

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

@media (min-width: 1024px) {
  .stack-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stack-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 24px 20px;
  box-shadow: var(--glass-shadow), var(--glass-inset-refract);
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.stack-card:hover {
  border-color: var(--border-glass-hover);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45), var(--glass-inset-refract);
}

.stack-icon-box {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(0, 212, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  flex-shrink: 0;
}

.stack-info {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.stack-info h4 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stack-info p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 4px;
  line-height: 1.45;
}

.stack-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid rgba(0, 255, 136, 0.2);
  color: var(--accent-secondary);
  margin-top: 10px;
}

/* ==========================================================================
   10. Why Us Section
   ========================================================================== */
.why-us {
  padding: var(--sp-80) 0;
  position: relative;
  background: var(--bg-secondary);
}

.why-us-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-24);
}

@media (min-width: 1024px) {
  .why-us-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.why-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 18px;
  padding: var(--sp-40) var(--sp-32);
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--glass-shadow), var(--glass-inset-refract);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.why-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-gradient);
}

.why-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glass-hover);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4), var(--glass-inset-refract);
}

.why-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: rgba(0, 255, 136, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-secondary);
  margin: 0 auto var(--sp-20);
}

.why-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--sp-12);
}

.why-description {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* ==========================================================================
   11. Contact Section (Pixel-Perfect Form & Contrast Fix)
   ========================================================================== */
.contact-section {
  padding: var(--sp-80) 0;
  position: relative;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-48);
  align-items: center;
}

@media (min-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-64);
  }
}

.contact-info h3 {
  font-size: clamp(1.75rem, 3.5vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--sp-16);
  line-height: 1.2;
}

.contact-info-text {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: var(--sp-32);
  line-height: 1.6;
}

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

.contact-detail-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-detail-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(0, 212, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  flex-shrink: 0;
}

.contact-detail-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 700;
  margin-bottom: 2px;
}

.contact-detail-value {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1rem;
}

/* Polished Contact Form Card */
.contact-form {
  background: var(--bg-card);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 36px 32px;
  box-shadow: var(--glass-shadow), var(--glass-inset-refract);
  display: flex;
  flex-direction: column;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: all 0.25s ease;
}

.form-input:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}

.form-input::placeholder {
  color: rgba(148, 163, 184, 0.5);
}

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

select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2224%22%20height%3D%2224%22%20viewBox%3D%220%200%2024%2024%22%20fill%3D%22none%22%20stroke%3D%22%2394a3b8%22%20stroke-width%3D%222%22%20stroke-linecap%3D%22round%22%20stroke-linejoin%3D%22round%22%3E%3Cpolyline%20points%3D%226%209%2012%2015%2018%209%22%3E%3C%2Fpolyline%3E%3C%2Fsvg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 16px;
  padding-right: 40px;
}

select.form-input option {
  background-color: #0d1122;
  color: #f8fafc;
}

.form-submit {
  width: 100%;
  padding: 14px 20px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.98rem;
  background: var(--accent-gradient);
  color: #000;
  box-shadow: var(--accent-glow);
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.form-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 255, 136, 0.45);
}

.form-submit:active {
  transform: scale(0.98);
}

.form-status {
  font-size: 0.85rem;
  margin-top: 12px;
  text-align: center;
}

/* ==========================================================================
   12. Footer
   ========================================================================== */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-glass);
  padding: var(--sp-64) 0 var(--sp-32);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-48);
  margin-bottom: var(--sp-48);
}

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

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: var(--sp-16);
  max-width: 320px;
  font-size: 0.92rem;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: var(--sp-20);
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.footer-social a:hover {
  background: var(--accent-gradient);
  color: #000;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--accent-glow-subtle);
}

.footer-column h4 {
  color: var(--text-primary);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--sp-20);
}

.footer-column ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-column ul li a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-column ul li a:hover {
  color: var(--accent-primary);
  padding-left: 4px;
}

.footer-bottom {
  padding-top: var(--sp-24);
  border-top: 1px solid var(--border-glass);
  display: flex;
  flex-direction: column;
  gap: var(--sp-16);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-bottom-links {
  display: flex;
  justify-content: center;
  gap: var(--sp-24);
}

.footer-bottom-links a:hover {
  color: var(--accent-primary);
}

/* ==========================================================================
   13. Reveal & Scroll Animations
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}