:root {
  --primary: #1B5E20;
  /* Deep Forest Green */
  --primary-light: #4c8c4a;
  --secondary: #FFC107;
  /* Golden Rod */
  --secondary-hover: #ffca28;
  --text-dark: #212121;
  --text-light: #757575;
  --bg-light: #F9F9F9;
  --white: #ffffff;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
  --radius-md: 12px;
  --radius-lg: 24px;
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Poppins', sans-serif;
  --transition: all 0.3s ease;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background-color: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  color: var(--primary);
  margin-top: 0;
}

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

/* Navbar */
.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.logo-link {
  display: flex;
  align-items: center;
}

.logo-img {
  max-height: 60px;
  width: auto;
  object-fit: contain;
  transition: var(--transition);
}

.logo-link:hover .logo-img {
  transform: scale(1.05);
  /* Subtle zoom on hover */
}

.navbar ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
  align-items: center;
}

.navbar a {
  color: var(--text-dark);
  font-weight: 500;
  font-size: 0.95rem;
}

.navbar a:hover {
  color: var(--primary);
}

.navbar .btn-donar {
  background-color: var(--primary);
  color: var(--white);
  padding: 0.6rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
}

.navbar .btn-donar:hover {
  background-color: var(--primary-light);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(27, 94, 32, 0.2);
}

/* Hero Section */
.hero {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.4)), url('../assets/img/hero.png') center/cover no-repeat;
  color: var(--white);
  text-align: center;
  padding: 140px 20px 100px;
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.hero h1 {
  font-size: 3.5rem;
  color: var(--white);
  margin-bottom: 1rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
  font-size: 1.25rem;
  max-width: 600px;
  margin-bottom: 2rem;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.btn-cta {
  background-color: var(--secondary);
  color: var(--text-dark);
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 15px rgba(255, 193, 7, 0.4);
}

.btn-cta:hover {
  background-color: var(--secondary-hover);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(255, 193, 7, 0.6);
}

/* Sections */
.section {
  padding: 80px 5%;
}

.section h2 {
  text-align: center;
  font-size: 2.25rem;
  margin-bottom: 3rem;
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
}

.section h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background-color: var(--secondary);
  margin: 10px auto 0;
  border-radius: 2px;
}

/* Cards */
.card-container {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.card {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 2.5rem 2rem;
  text-align: center;
  flex: 1 1 300px;
  max-width: 350px;
  transition: var(--transition);
  border: 1px solid rgba(0, 0, 0, 0.03);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.card i {
  margin-bottom: 1.5rem;
  transition: var(--transition);
}

.card:hover i {
  transform: scale(1.1);
}

.card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* Stats */
.stats {
  display: flex;
  justify-content: center;
  gap: 4rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat .counter {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--secondary);
  display: block;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat p {
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.9rem;
}

/* Contact Form */
#contactForm {
  max-width: 600px;
  margin: 0 auto;
  background: var(--white);
  padding: 3rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
}

label {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
  font-size: 0.9rem;
}

input,
textarea {
  padding: 1rem;
  border: 2px solid #e0e0e0;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition);
  background-color: #fdfdfd;
}

input:focus,
textarea:focus {
  border-color: var(--primary);
  outline: none;
  background-color: var(--white);
}

button[type="submit"] {
  width: 100%;
  background-color: var(--primary);
  color: var(--white);
  padding: 1rem;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
}

button[type="submit"]:hover {
  background-color: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(27, 94, 32, 0.3);
}

footer {
  background-color: var(--text-dark);
  color: var(--white);
  text-align: center;
  padding: 2rem;
  font-size: 0.9rem;
}

/* Mobile Controls */
.mobile-controls {
  display: none;
  align-items: center;
  gap: 1rem;
}

.menu-toggle {
  background: none;
  border: none;
  font-size: 1.8rem;
  color: var(--primary);
  cursor: pointer;
  display: none;
  z-index: 1100;
  /* Above overlay */
  transition: transform 0.3s ease;
}

.menu-toggle:active {
  transform: scale(0.9);
}

.btn-donar-mobile {
  background-color: var(--secondary);
  color: var(--text-dark);
  padding: 0.6rem 1.2rem;
  border-radius: 50px;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.85rem;
  box-shadow: 0 4px 10px rgba(255, 193, 7, 0.3);
  transition: var(--transition);
}

.btn-donar-mobile:hover {
  background-color: var(--secondary-hover);
  transform: translateY(-2px);
}

.btn-whatsapp {
  background-color: #25D366;
  /* color oficial de WhatsApp */
  color: #fff;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  display: inline-block;
  transition: 0.3s;
}

.btn-whatsapp:hover {
  background-color: #128C7E;
}

.btn-email {
  background-color: #FFFF00;
  /* color oficial de WhatsApp */
  color: #000;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  display: inline-block;
  transition: 0.3s;
}

.btn-email:hover {
  background-color: #FFD700;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }

  .navbar {
    padding: 1rem 1.5rem;
    justify-content: space-between;
  }

  .logo-img {
    max-height: 45px;
  }

  /* Show Mobile Controls */
  .mobile-controls {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  /* Off-Canvas Menu Configuration */
  #mainNav {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

    /* Animation State: Hidden */
    opacity: 0;
    pointer-events: none;
    transform: translateY(-20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* Animation State: Active */
  #mainNav.active {
    opacity: 1;
    pointer-events: all;
    transform: translateY(0);
  }

  .navbar ul {
    flex-direction: column;
    gap: 2.5rem;
    text-align: center;
  }

  .navbar ul li a {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    position: relative;
    display: inline-block;
  }

  /* Elegant Underline Effect */
  .navbar ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 3px;
    bottom: -8px;
    left: 50%;
    background-color: var(--secondary);
    transition: all 0.3s ease;
    transform: translateX(-50%);
  }

  .navbar ul li a:hover::after {
    width: 100%;
  }

  /* Hide Desktop Donate Button */
  .navbar ul li .btn-donar {
    display: none;
  }

  .stats {
    gap: 2rem;
  }

  #contactForm {
    padding: 1.5rem;
  }
}