:root {
  --bg-color-light: #f5f5f5;
  --text-color-light: #333333;
  --accent-color-light: #6200ea;
  --card-bg-light: #ffffff;
  --hover-light: #f0f0f0;

  --bg-color-dark: #121212;
  --text-color-dark: #ffffff;
  --accent-color-dark: #bb86fc;
  --card-bg-dark: #1e1e1e;
  --hover-dark: #2c2c2c;

  --stripe-height: 60px;
  --transition-speed: 0.3s;
  --border-radius: 10px;
}

body {
  font-family: "Roboto", Arial, sans-serif;
  background-color: var(--bg-color-light);
  color: var(--text-color-light);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

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

.top-stripe {
  height: var(--stripe-height);
  background-color: var(--accent-color-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

body.dark-mode .top-stripe {
  background-color: var(--accent-color-dark);
}

.back-link {
  background-color: transparent;
  border: 2px solid var(--bg-color-light);
  color: var(--bg-color-light);
  font-size: 24px;
  cursor: pointer;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: all var(--transition-speed);
}

.back-link:hover {
  background-color: var(--bg-color-light);
  color: var(--accent-color-light);
}

body.dark-mode .back-link {
  border-color: var(--bg-color-dark);
  color: var(--bg-color-dark);
}

body.dark-mode .back-link:hover {
  background-color: var(--bg-color-dark);
  color: var(--accent-color-dark);
}

.theme-switch {
  position: relative;
  width: 50px;
  height: 25px;
  border-radius: 15px;
  background-color: var(--bg-color-light);
  cursor: pointer;
  transition: background-color var(--transition-speed);
}

.switch-handle {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 21px;
  height: 21px;
  background-color: var(--accent-color-light);
  border-radius: 50%;
  transition: transform var(--transition-speed);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

body.dark-mode .switch-handle {
  transform: translateX(25px);
  background-color: var(--accent-color-dark);
}

.container {
  max-width: 800px;
  margin: 40px auto;
  padding: 20px;
  flex: 1;
}

.projects {
  display: grid;
  gap: 20px;
}

.project {
  background-color: var(--card-bg-light);
  padding: 20px;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

body.dark-mode .project {
  background-color: var(--card-bg-dark);
}

.project:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.project h2 {
  margin-top: 0;
  color: var(--accent-color-light);
}

body.dark-mode .project h2 {
  color: var(--accent-color-dark);
}

.description {
  margin-top: 10px;
  font-size: 0.9rem;
  opacity: 0.8;
}

footer {
  background-color: var(--accent-color-light);
  color: white;
  text-align: center;
  padding: 15px 0;
  transition: background-color var(--transition-speed);
}

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

@media screen and (max-width: 600px) {
  .container {
    padding: 10px;
  }

  .project {
    padding: 15px;
  }
}