:root {
  --primary-color: #4F46E5;
  /* Indigo 600 */
  --secondary-color: #818CF8;
  --bg-color: #0F172A;
  /* Slate 900 */
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --card-bg: rgba(30, 41, 59, 0.7);
  /* Slate 800 with opacity */
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  background-image: linear-gradient(rgba(15, 23, 42, 0.75), rgba(15, 23, 42, 0.95)), url('../img/background-02.webp');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: var(--text-main);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.auth-btn {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border: none;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 30px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  transition: transform 0.3s, box-shadow 0.3s;
  text-decoration: none;
  font-size: 1.1rem;
}

.auth-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(79, 70, 229, 0.5);
  color: white;
}

.splash-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  animation: fadeIn 1s ease-out;
  position: relative;
  z-index: 1;
}

.glow-effect {
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.4) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: -1;
  filter: blur(40px);
}

.math-title {
  font-size: 5rem;
  font-weight: 800;
  letter-spacing: 4px;
  background: linear-gradient(to right, #60A5FA, #34D399);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 5px;
  text-transform: uppercase;
  text-shadow: 0 0 20px rgba(96, 165, 250, 0.2);
}

.subtitle {
  color: var(--text-muted);
  font-size: 1.3rem;
  margin-bottom: 50px;
  font-weight: 400;
}

.menu-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  padding: 40px 30px;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.menu-card:hover {
  transform: translateY(-10px);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.menu-card i {
  font-size: 3.5rem;
  margin-bottom: 20px;
  display: inline-block;
  transition: transform 0.3s;
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animation-fade {
  animation: fadeIn 0.8s ease-out;
}

.navbar {
  background: rgba(15, 23, 42, 0.8) !important;
  backdrop-filter: blur(15px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 15px;
  padding-bottom: 15px;
}


.mission .menu-card p {
  min-height: 50px;
  max-height: 50px;
  overflow: hidden;
}



@media (min-width: 576px) {

  .container,
  .container-sm {
    max-width: 97%;
  }
}