/* ==========================
   HEADER
========================== */
header {
    background: #ffffff;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
  }
  
  header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  header h1 {
    font-size: 22px;
    color: #111827;
  }

  nav {
    display: flex;
    align-items: center;
  }
  
  nav a {
    margin-left: 20px;
    font-weight: 500;
    color: var(--text-muted);
    transition: 0.3s;
  }
  
  nav a:hover {
    color: var(--primary);
  }
  
  /* ==========================
     HERO
  ========================== */
  .hero {
    padding: 100px 0;
    text-align: center;
    background: var(--secondary);
  }
  
  .hero h2 {
    font-size: 40px;
    margin-bottom: 20px;
  }
  
  .hero p {
    font-size: 18px;
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }
  
  /* ==========================
     FEATURES
  ========================== */
  .features {
    padding: 80px 0;
  }
  
  .feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
    margin-top: 40px;
  }
  
  .feature {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 10px;
    border: 1px solid var(--border);
    transition: 0.3s ease;
  }
  
  .feature:hover {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
  }
  
  /* ==========================
     WHY SECTION
  ========================== */
  .why {
    padding: 35px 0;
  }
  
  /* ==========================
     FOOTER
  ========================== */
  footer {
    background: #ffffff;
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid var(--border);
    font-size: 14px;
    color: var(--text-muted);
  }

 /* ==========================
     calculator
  ========================== */
  .calculator-box {
    width: 50%;
    background: #ffffff;
    padding: 20px;
    border-radius: 8px;
    margin-top: 40px;
    margin-bottom: 40px;
}

.calculator-box input {
    width: 100%;
    padding: 8px;
    margin-bottom: 12px;
}

.calculator-box button {
    padding: 10px;
    width: 100%;
    background: #0f172a;
    color: white;
    border: none;
    cursor: pointer;
}

.result {
    margin-top: 15px;
    background: #f1f5f9;
    padding: 10px;
    border-radius: 6px;
}

.menu-container {
  width: 100%;
  display: flex;
  justify-content: space-between;
  flex-direction: row;
}


/* ==========================
   MOBILE RESPONSIVE
========================== */
@media (max-width: 768px) {

    header .container {
      flex-direction: column;
      align-items: flex-start;
      gap: 10px;
    }
  
    nav {
      width: 100%;
      flex-wrap: wrap;
      gap: 16px;
    }
  
    nav a {
      font-size: 14px;
      margin-left: 0;
    }

    .calculator-box {
      width: 100% !important;
    }

    .menu-container {
      flex-direction: column;
    }
  
  }