:root {
  --primary-color: #6a11cb;
  --secondary-color: #2575fc;
  --background-color-light: #f4f7f6;
  --text-color-light: #333;
  --container-bg-light: #fff;
  --border-color-light: #e0e0e0;
  --button-text-color-light: #fff;

  --background-color-dark: #1a1a2e;
  --text-color-dark: #e0e0e0;
  --container-bg-dark: #16213e;
  --border-color-dark: #0f3460;
  --button-text-color-dark: #e0e0e0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--background-color-light);
  color: var(--text-color-light);
  margin: 0;
  transition: background-color 0.3s, color 0.3s;
}

body.dark-mode {
  background-color: var(--background-color-dark);
  color: var(--text-color-dark);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--container-bg-light);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

body.dark-mode .navbar {
  background-color: var(--container-bg-dark);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
  text-decoration: none;
}

.navbar-nav a {
  margin-left: 1.5rem;
  text-decoration: none;
  color: var(--text-color-light);
  font-weight: 500;
}

body.dark-mode .navbar-nav a {
  color: var(--text-color-dark);
}

.container {
  max-width: 960px;
  margin: 2rem auto;
  padding: 2rem;
  background-color: var(--container-bg-light);
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body.dark-mode .container {
  background-color: var(--container-bg-dark);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
}

h1 {
  text-align: center;
  color: var(--primary-color);
  margin-bottom: 2rem;
}

button {
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  color: var(--button-text-color-light);
  border: none;
  padding: 12px 24px;
  border-radius: 25px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.theme-switcher {
  position: relative;
}

.theme-switcher input {
  display: none;
}

.theme-switcher label {
  display: block;
  width: 50px;
  height: 25px;
  background-color: #ccc;
  border-radius: 25px;
  cursor: pointer;
  position: relative;
  transition: background-color 0.3s;
}

.theme-switcher label::after {
  content: '';
  width: 21px;
  height: 21px;
  background-color: white;
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform 0.3s;
}

.theme-switcher input:checked + label {
  background-color: var(--secondary-color);
}

.theme-switcher input:checked + label::after {
  transform: translateX(25px);
}

#numbers-container {
  display: flex;
  justify-content: center;
  margin: 2rem 0;
}

.number {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 8px;
  font-size: 1.5rem;
  font-weight: bold;
  color: white;
}

.number:nth-child(1) { background-color: #F44336; }
.number:nth-child(2) { background-color: #E91E63; }
.number:nth-child(3) { background-color: #9C27B0; }
.number:nth-child(4) { background-color: #673AB7; }
.number:nth-child(5) { background-color: #3F51B5; }
.number:nth-child(6) { background-color: #2196F3; }

#contact-form, #disqus_thread_section {
    margin-top: 2rem;
    padding: 2rem;
    border: 1px solid var(--border-color-light);
    border-radius: 8px;
}

body.dark-mode #contact-form, body.dark-mode #disqus_thread_section {
    border-color: var(--border-color-dark);
}

#image-upload {
    display: block;
    margin: 2rem auto;
}

#image-container {
    width: 100%;
    max-width: 500px;
    margin: 1rem auto 2rem;
    border: 2px dashed var(--border-color-light);
    border-radius: 8px;
    padding: 10px;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

body.dark-mode #image-container {
    border-color: var(--border-color-dark);
}

#image-preview {
    max-width: 100%;
    max-height: 400px;
    display: none;
    border-radius: 8px;
}

#predict-button {
    display: none;
    margin: 0 auto 1rem;
}

#label-container {
    margin-top: 1rem;
    font-size: 1.2em;
    text-align: center;
}

.footer {
  text-align: center;
  padding: 2rem 0;
  margin-top: 2rem;
  background-color: var(--container-bg-light);
  box-shadow: 0 -2px 4px rgba(0,0,0,0.1);
}

body.dark-mode .footer {
  background-color: var(--container-bg-dark);
  box-shadow: 0 -2px 4px rgba(0,0,0,0.5);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  cursor: pointer;
}

.hamburger div {
  width: 25px;
  height: 3px;
  background-color: var(--text-color-light);
  margin: 5px 0;
  transition: 0.4s;
}

body.dark-mode .hamburger div {
    background-color: var(--text-color-dark);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.mobile-nav a {
    padding: 1rem;
    text-align: center;
    width: 100%;
}

/* Responsive Design */
@media (max-width: 768px) {
  .navbar-nav {
    display: none;
  }

  .hamburger {
    display: block;
    position: absolute;
    top: 1rem;
    right: 1rem;
  }

  .navbar.active .navbar-nav {
    display: flex;
    flex-direction: column;
    width: 100%;
    align-items: center;
    margin-top: 4rem;
  }

  .navbar.active .navbar-nav a {
    margin: 1rem 0;
  }
  
  .navbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .theme-switcher {
    position: absolute;
    top: 1.2rem;
    right: 4rem;
  }

  .container {
    margin: 1rem;
    padding: 1rem;
  }

  #numbers-container {
    flex-wrap: wrap;
  }

  .number {
    width: 50px;
    height: 50px;
    font-size: 1.2rem;
    margin: 5px;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.8rem;
  }

  .number {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  button {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
}