:root {
  --bg-base: #0a0a0f;
  --bg-surface: #12121a;
  --bg-elevated: #1a1a24;
  --bg-hover: #22222e;
  --bg-header: rgba(10, 10, 15, 0.92);
  --text-primary: #f5f5f7;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  --accent: #00ff88;
  --accent-2: #06b6d4;
  --accent-glow: rgba(0, 255, 136, 0.15);
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

[data-theme="light"] {
  --bg-base: #f5f5f7;
  --bg-surface: #ffffff;
  --bg-elevated: #fafafa;
  --bg-hover: #f0f0f3;
  --bg-header: rgba(255, 255, 255, 0.92);
  --text-primary: #0a0a0f;
  --text-secondary: #52525b;
  --text-muted: #a1a1aa;
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.15);
  --accent: #00b368;
  --accent-2: #0891b2;
  --accent-glow: rgba(0, 179, 104, 0.1);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

/* ===================================
   Reset & Base
   =================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

/* Fondo con patrón sutil */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: 
    radial-gradient(circle at 15% 20%, var(--accent-glow) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 40%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

/* ===================================
   Scrollbar
   =================================== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-surface);
}
::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-2);
}

/* ===================================
   Header
   =================================== */
header {
  background: var(--bg-header);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 1.25rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease, padding 0.3s ease, box-shadow 0.3s ease;
}

header.scrolled {
  padding: 0.75rem 1.5rem;
  box-shadow: var(--shadow);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
}

.logo {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  object-fit: contain;
}

.logo:hover {
  transform: rotate(360deg) scale(1.1);
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-title span {
  color: var(--accent);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  transition: var(--transition);
  font-family: inherit;
}

.back-link:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.15);
}

.back-icon {
  font-size: 1.1rem;
  transition: transform 0.3s ease;
}

.back-link:hover .back-icon {
  transform: translateX(-4px);
}

/* ===================================
   Main Container
   =================================== */
.main-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  flex: 1;
  width: 100%;
  position: relative;
  z-index: 1;
}

/* ===================================
   Hero Section
   =================================== */
.contact-hero {
  text-align: center;
  padding: 2rem 0 3rem;
  animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-badge {
  display: inline-block;
  padding: 0.25rem 1rem;
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: var(--font-display);
  margin-bottom: 1rem;
}

.contact-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.contact-hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===================================
   Contact Grid
   =================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 2rem;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

/* ===================================
   Contact Info Card
   =================================== */
.contact-info-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.contact-info-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}

.contact-info-card h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.info-description {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  flex: 1;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.75rem;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.contact-item:hover {
  background: var(--bg-hover);
}

.item-icon {
  font-size: 1.25rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  flex-shrink: 0;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.contact-item:hover .item-icon {
  border-color: var(--accent);
  box-shadow: 0 0 16px var(--accent-glow);
}

.item-content strong {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.125rem;
}

.item-content p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ===================================
   WhatsApp Button
   =================================== */
.whatsapp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.875rem 1.5rem;
  background: #25D366;
  color: #ffffff;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1rem;
  transition: var(--transition);
  margin-top: 1.5rem;
  border: none;
  cursor: pointer;
  font-family: inherit;
  width: 100%;
}

.whatsapp-btn:hover {
  background: #128C7E;
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(37, 211, 102, 0.3);
}

.whatsapp-icon {
  font-size: 1.25rem;
}

/* ===================================
   Contact Form Card
   =================================== */
.contact-form-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  transition: var(--transition);
}

.contact-form-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}

.contact-form-card h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.form-description {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 1.5rem;
}

/* ===================================
   Form Styles
   =================================== */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-group label {
  font-weight: 600;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.75rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  color: var(--text-primary);
  transition: var(--transition);
  font-family: inherit;
  outline: none;
  width: 100%;
}

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

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

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2371717a' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

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

/* ===================================
   Submit Button
   =================================== */
.submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.875rem 2rem;
  background: var(--accent);
  color: var(--bg-base);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  margin-top: 0.5rem;
  position: relative;
  overflow: hidden;
}

.submit-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-2);
  opacity: 0;
  transition: var(--transition);
}

.submit-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--accent-glow);
}

.submit-btn:hover::before {
  opacity: 1;
}

.submit-btn .btn-text {
  position: relative;
  z-index: 1;
}

.submit-btn .btn-loader {
  position: relative;
  z-index: 1;
}

.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none !important;
}

/* ===================================
   Form Messages
   =================================== */
.form-message {
  margin-top: 0.75rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  display: none;
}

.form-message.visible {
  display: block;
}

.form-message.success {
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid var(--accent);
  color: var(--accent);
}

.form-message.error {
  background: rgba(255, 59, 92, 0.1);
  border: 1px solid var(--status-live);
  color: var(--status-live);
}

/* ===================================
   Footer
   =================================== */
footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: auto;
  position: relative;
  z-index: 1;
}

footer strong {
  color: var(--accent);
  font-weight: 700;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
}

/* ===================================
   Responsive
   =================================== */
@media (max-width: 992px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

  .contact-hero h1 {
    font-size: 2rem;
  }
}

@media (max-width: 768px) {
  header {
    padding: 0.75rem 1rem;
  }

  .header-inner {
    flex-direction: column;
    gap: 0.75rem;
  }

  .header-brand {
    justify-content: center;
  }

  .header-controls {
    width: 100%;
    justify-content: center;
  }

  .main-container {
    padding: 1.5rem 1rem;
  }

  .contact-hero {
    padding: 1rem 0 2rem;
  }

  .contact-hero h1 {
    font-size: 1.5rem;
  }

  .contact-hero p {
    font-size: 1rem;
  }

  .contact-info-card,
  .contact-form-card {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .contact-info-card,
  .contact-form-card {
    padding: 1.25rem;
  }

  .contact-item {
    padding: 0.5rem;
  }

  .item-icon {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  .whatsapp-btn {
    font-size: 0.875rem;
    padding: 0.75rem 1rem;
  }

  .submit-btn {
    font-size: 0.875rem;
    padding: 0.75rem 1.5rem;
  }
}