/* ==== RESET DAN DASAR ==== */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Poppins', Arial, sans-serif;
  background: #f5f8fc;
  color: #333;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ==== CONTAINER UTAMA ==== */
.container {
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 0 20px;
}

/* ==== HEADER ==== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;
  background-color: #3498db;
  color: white;
  padding: 18px 0;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.header-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

header h2 {
  margin: 0;
  font-weight: 600;
  font-size: 24px;
}

header nav {
  display: flex;
  flex-wrap: wrap;
  margin-top: 10px;
}

header nav a {
  color: white;
  text-decoration: none;
  margin-left: 24px;
  font-weight: 500;
  font-size: 16px;
  transition: all 0.3s ease;
}

header nav a:hover,
header nav a.active {
  opacity: 0.9;
  text-decoration: underline;
}

/* ==== MAIN SECTION ==== */
main {
  flex-grow: 1;
  display: flex;
  justify-content: center;
  align-items: start;
  padding: 100px 20px 60px; /* Responsive padding */
  flex-direction: column;
}

/* ==== FORM PREDIKSI ==== */
.main-container {
  background: white;
  padding: 50px 40px;
  border-radius: 16px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.08);
  text-align: center;
  margin: 0 auto 40px;
  max-width: 600px;
  width: 100%;
}

h1 {
  margin-bottom: 25px;
  font-weight: 600;
  color: #2c3e50;
  font-size: 26px;
}

.form-prediksi input {
  width: 100%;
  padding: 14px 18px;
  font-size: 16px;
  border: 2px solid #ddd;
  border-radius: 8px;
  margin-bottom: 18px;
  transition: 0.3s;
}

.form-prediksi input:focus {
  border-color: #3498db;
  box-shadow: 0 0 6px rgba(52, 152, 219, 0.2);
  outline: none;
}

.form-prediksi button {
  width: 100%;
  padding: 14px;
  font-size: 16px;
  background-color: #3498db;
  border: none;
  border-radius: 8px;
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.form-prediksi button:hover {
  background-color: #2980b9;
}

.bandingkan-container {
  margin-top: 1rem;
  padding: 2rem;
  background-color: white;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
  margin-bottom: 30px;
}

.bandingkan-container h2 {
  margin-bottom: 1rem;
}

.bandingkan-container p {
  margin-bottom: 1.5rem;
  color: #555;
}

/* ==== KONTEN EDUKASI ==== */
.saham-container,
.lstm-container,
.kesimpulan-container {
  max-width: 900px;
  margin: 0 auto 30px;
  background-color: #ffffff;
  padding: 40px;
  border-radius: 14px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.3s ease;
}

.saham-container:hover,
.lstm-container:hover,
.kesimpulan-container:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
}

.saham-title,
.lstm-title,
.kesimpulan-title {
  text-align: center;
  font-size: 22px;
  margin-bottom: 18px;
  font-weight: 600;
  color: #2c3e50;
}

.saham-text,
.lstm-text,
.kesimpulan-text {
  font-size: 16px;
  line-height: 1.75;
  text-align: justify;
  color: #444;
}


.form-section {
  background: #ffffff;
  padding: 30px 25px;
  margin: 30px auto;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  max-width: 600px;
  text-align: center;
}

.form-section h2, .form-section h1 {
  color: #2c3e50;
  margin-bottom: 15px;
}

.form-section p {
  margin-bottom: 20px;
  font-size: 15px;
  color: #555;
}

.form-prediksi {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.form-prediksi input {
  padding: 10px 14px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 8px;
}

.form-prediksi button {
  background-color: #3498db;
  color: white;
  padding: 10px 16px;
  font-size: 15px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.form-prediksi button:hover {
  background-color: #2980b9;
}

/* ==== FOOTER ==== */
footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: #2c3e50;
  color: #ccc;
  padding: 16px 0;
  text-align: center;
  font-size: 14px;
  z-index: 999;
}

.footer-container p {
  margin: 0;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
  header h2 {
    font-size: 20px;
    margin-bottom: 10px;
  }

  header nav {
    flex-direction: column;
    align-items: flex-start;
    margin-left: 0;
  }

  header nav a {
    margin: 6px 0 0 0;
    font-size: 15px;
  }

  .main-container {
    padding: 30px 20px;
  }

  .saham-container,
  .lstm-container,
  .kesimpulan-container {
    padding: 25px 20px;
  }

  h1 {
    font-size: 22px;
  }

  .form-prediksi input,
  .form-prediksi button {
    font-size: 15px;
    padding: 12px;
  }

  .bandingkan-container {
    padding: 20px 16px;
  }

  footer {
    font-size: 13px;
    padding: 12px 0;
  }
}

@media (max-width: 480px) {
  header h2 {
    font-size: 18px;
  }

  header nav a {
    font-size: 14px;
  }

  .main-container,
  .bandingkan-container,
  .saham-container,
  .lstm-container,
  .kesimpulan-container {
    margin: 0 10px 20px;
  }

  h1 {
    font-size: 20px;
  }
}