/* ===================================
   MERCANET - CONTACTO
   Estilo moderno y consistente
   =================================== */

:root {
  --primary: #1e40af;
  --primary-dark: #1e3a8a;
  --primary-light: #3b82f6;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --success: #10b981;
  --danger: #ef4444;
  --whatsapp: #25D366;
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
}

a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
img { max-width: 100%; display: block; }

/* ===== HEADER ===== */
.header {
  position: sticky;
  top: 0;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  z-index: 1000;
  transition: box-shadow 0.2s;
}

.header.scrolled {
  box-shadow: var(--shadow);
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
}

.logo-text {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.nav-links a {
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-600);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.nav-links a:hover {
  background: rgba(30, 64, 175, 0.08);
  color: var(--primary);
}

.nav-links .sell-btn {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--white) !important;
}

.user-area {
  margin-left: 12px;
}

.login-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--primary);
  color: var(--white);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.875rem;
}

.user-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 6px;
  border-radius: var(--radius-full);
  transition: background 0.2s;
}

.user-btn:hover {
  background: var(--gray-100);
}

.avatar {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
}

.user-btn span {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--gray-700);
}

/* ===== MAIN ===== */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px 100px;
}

/* Contact Container */
.contact-container {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 60px;
}

/* Contact Info */
.contact-info {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius-xl);
  padding: 40px;
  color: var(--white);
}

.info-header {
  margin-bottom: 36px;
}

.info-header h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.info-header p {
  font-size: 1rem;
  opacity: 0.9;
}

.info-items {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 36px;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.info-icon {
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.info-content h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.info-content p,
.info-content a {
  font-size: 0.875rem;
  opacity: 0.9;
}

.whatsapp-link {
  color: #7fec9d;
  font-weight: 500;
}

.whatsapp-link:hover {
  text-decoration: underline;
}

.social-links h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.social-icons {
  display: flex;
  gap: 12px;
}

.social-icon {
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  transition: all 0.2s;
}

.social-icon:hover {
  background: var(--white);
  color: var(--primary);
  transform: translateY(-4px);
}

/* Contact Form Container */
.contact-form-container {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.form-header {
  margin-bottom: 28px;
}

.form-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.form-header p {
  font-size: 0.9375rem;
  color: var(--gray-500);
}

/* Success Message */
.success-message {
  text-align: center;
  padding: 40px 20px;
}

.success-icon {
  width: 80px;
  height: 80px;
  background: rgba(16, 185, 129, 0.1);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}

.success-icon i {
  font-size: 2.5rem;
  color: var(--success);
}

.success-message h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.success-message p {
  color: var(--gray-500);
  margin-bottom: 24px;
}

/* Alert */
.alert {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  font-size: 0.9375rem;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Form */
.contact-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: 8px;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-group label i {
  color: var(--primary);
  font-size: 0.8125rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--gray-50);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  color: var(--gray-800);
  transition: all 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--white);
  box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-400);
}

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

.char-count {
  font-size: 0.75rem;
  color: var(--gray-400);
  text-align: right;
  margin-top: 4px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
  box-shadow: 0 4px 12px rgba(30, 64, 175, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(30, 64, 175, 0.4);
}

.btn-submit {
  width: 100%;
  margin-top: 8px;
}

/* FAQ Section */
.faq-section {
  margin-top: 60px;
}

.section-header {
  margin-bottom: 24px;
}

.section-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-header h2 i {
  color: var(--primary);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.faq-item {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: all 0.2s;
}

.faq-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.faq-icon {
  width: 48px;
  height: 48px;
  background: rgba(30, 64, 175, 0.1);
  color: var(--primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.faq-item h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 8px;
}

.faq-item p {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.6;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--gray-900);
  color: var(--white);
  padding: 48px 24px 24px;
  margin-top: 48px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
}

.footer-logo {
  font-size: 1.25rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

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

.footer-brand p {
  color: var(--gray-400);
  font-size: 0.9375rem;
}

.footer-links h4 {
  margin-bottom: 16px;
  font-size: 1rem;
}

.footer-links a {
  display: block;
  color: var(--gray-400);
  margin-bottom: 10px;
  font-size: 0.9375rem;
  transition: color 0.2s;
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--gray-700);
  text-align: center;
  color: var(--gray-500);
  font-size: 0.875rem;
}

/* ===== BOTTOM NAV ===== */
.bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 65px;
  background: var(--white);
  border-top: 1px solid var(--gray-200);
  justify-content: space-around;
  align-items: center;
  z-index: 1000;
}

.bottom-nav a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 0.625rem;
  color: var(--gray-400);
  padding: 8px 12px;
}

.bottom-nav a i {
  font-size: 1.25rem;
}

.bottom-nav a.active {
  color: var(--primary);
}

.bottom-nav .sell {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--white) !important;
  border-radius: 50%;
  margin-top: -25px;
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
  justify-content: center;
}

.bottom-nav .sell span {
  display: none;
}

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  background: var(--gray-800);
  color: var(--white);
  border-radius: var(--radius-full);
  font-size: 0.9375rem;
  font-weight: 500;
  opacity: 0;
  transition: all 0.3s;
  z-index: 2000;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast i {
  color: var(--success);
}

.toast.toast-error i {
  color: var(--danger);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .contact-container {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .contact-info {
    padding: 32px;
  }

  .contact-form-container {
    padding: 32px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: 12px 16px;
  }

  .logo-text, .nav-links, .user-btn span {
    display: none;
  }

  .main {
    padding: 24px 16px 90px;
  }

  .contact-info {
    padding: 28px 20px;
  }

  .info-header h1 {
    font-size: 1.5rem;
  }

  .info-items {
    gap: 20px;
  }

  .info-icon {
    width: 42px;
    height: 42px;
    font-size: 1rem;
  }

  .contact-form-container {
    padding: 24px 20px;
  }

  .form-header h2 {
    font-size: 1.25rem;
  }

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

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

  .footer {
    display: none;
  }

  .bottom-nav {
    display: flex;
  }

  .toast {
    bottom: 80px;
    left: 16px;
    right: 16px;
    transform: translateX(0) translateY(20px);
  }

  .toast.show {
    transform: translateX(0) translateY(0);
  }
}

@media (max-width: 480px) {
  .social-icons {
    justify-content: center;
  }

  .success-message {
    padding: 30px 16px;
  }

  .success-icon {
    width: 64px;
    height: 64px;
  }

  .success-icon i {
    font-size: 2rem;
  }
}