/* General Styles */
body {
  font-family: 'Arial', sans-serif;
  margin: 0;
  padding: 0;
  color: #fff;
  background-color: #000;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Header Styles */
header {
  background: #1a1a1a;
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 10;
}

header .logo {
  font-size: 1.5rem;
  color: #fff;
}

header .menu-toggle {
  display: none;
  font-size: 1.5rem;
  background: none;
  color: #fff;
  border: none;
  cursor: pointer;
}

header .nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

header .nav-links li a {
  text-decoration: none;
  color: #fff;
  font-weight: bold;
  position: relative;
}

header .nav-links li a:hover::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background: #fff;
  animation: slide-in 0.3s ease forwards;
}

header .cta-button {
  background: #fff;
  color: #000;
  padding: 0.5rem 1rem;
  border-radius: 25px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
}

header .cta-button:hover {
  background: #000;
  color: #fff;
  border: 2px solid #fff;
}

@keyframes slide-in {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

/* Hero Section */
#hero {
  text-align: center;
  padding: 2rem;
  background: #000;
  animation: fade-in 1s ease;
}

#hero h1 {
  font-size: 2.5rem;
  color: #fff;
}

#hero p {
  margin: 1rem 0;
  font-size: 1.2rem;
  color: #ccc;
}

#hero .cta-button {
  margin-top: 1rem;
  font-size: 1rem;
}

/* Features Section */
#features {
  background: #1a1a1a;
  padding: 2rem;
  text-align: center;
}

.feature-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.feature-card {
  background: #000;
  color: #fff;
  border: 1px solid #333;
  border-radius: 10px;
  padding: 1rem;
  width: 250px;
  text-align: center;
  box-shadow: 0 4px 8px rgba(255, 255, 255, 0.1);
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-10px);
  background: #1a1a1a;
}

/* Tools Section */
.tool {
  background: #1a1a1a;
  border: 1px solid #333;
  padding: 1rem;
  margin: 1rem 0;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(255, 255, 255, 0.1);
  animation: slide-up 1s ease;
}

.tool h3 {
  margin-bottom: 1rem;
  color: #fff;
}

.tool input,
.tool textarea,
.tool button {
  width: 100%;
  padding: 0.5rem;
  margin-bottom: 1rem;
  border: 1px solid #333;
  border-radius: 5px;
  background: #000;
  color: #fff;
}

.tool button {
  background: #fff;
  color: #000;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease;
}

.tool button:hover {
  background: #000;
  color: #fff;
  border: 1px solid #fff;
}

/* Animations */
@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slide-up {
  from {
    transform: translateY(50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Productivity Graph */
#graph canvas {
  display: block;
  margin: 0 auto;
}

/* Footer */
footer {
  background: #1a1a1a;
  color: #fff;
  text-align: center;
  padding: 1rem;
  position: relative;
  z-index: 5;
}

/* Responsive Design */
@media (max-width: 768px) {
  header .menu-toggle {
    display: block;
  }

  header .nav-links {
    display: none;
    flex-direction: column;
    gap: 1rem;
    position: absolute;
    top: 60px;
    right: 1rem;
    background: #1a1a1a;
    padding: 1rem;
    border-radius: 10px;
  }

  header .nav-links.active {
    display: flex;
  }

  .feature-cards {
    flex-direction: column;
  }

  #hero h1 {
    font-size: 2rem;
  }
}

/* Contact Section */
#contact {
  background: #000;
  padding: 2rem;
  text-align: center;
}

#contact h2 {
  margin-bottom: 1rem;
}

#contact-form {
  max-width: 600px;
  margin: 0 auto;
  text-align: left;
}

#contact-form label {
  color: #fff;
  display: block;
  margin-top: 1rem;
}

#contact-form input,
#contact-form textarea {
  width: 100%;
  padding: 0.5rem;
  margin-top: 0.5rem;
  background: #1a1a1a;
  border: 1px solid #444;
  border-radius: 5px;
  color: #fff;
}

#contact-form button {
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  background: #fff;
  color: #000;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.3s ease;
}

#contact-form button:hover {
  background: #000;
  color: #fff;
  border: 1px solid #fff;
}

/* Adjust sizes for specific buttons */
#add-todo,
#start-timer,
#reset-timer,
#save-note,
#add-goal {
  width: 120px;
  height: 40px;
  font-size: 1rem;
  border-radius: 10px;
  padding: 0.5rem;
}

/* Modify Explore Tools Button */
.cta-button {
  padding: 1rem 2rem;
  font-size: 1.2rem;
  background: linear-gradient(90deg, #007BFF, #00FFAA);
  color: #fff;
  border: none;
  border-radius: 25px;
  transition: transform 0.3s ease;
}

.cta-button:hover {
  transform: scale(1.1);
}

/* Reduce empty spaces for PC screens */
@media (min-width: 1024px) {
  #hero {
    padding: 1rem;
  }

  #features {
    padding: 1rem;
  }

  .tool {
    margin: 0.5rem 0;
  }

  #timer-history {
    margin-top: 1rem;
    background: #1a1a1a;
    padding: 0.5rem;
    border-radius: 5px;
    border: 1px solid #333;
    box-shadow: 0 2px 4px rgba(255, 255, 255, 0.1);
  }

  #timer-history h4 {
    margin: 0;
    font-size: 1rem;
    color: #fff;
  }

  #timer-history ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
  }

  #timer-history ul li {
    color: #ccc;
    font-size: 0.9rem;
  }
}