/* Reset & Base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea, #764ba2);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  transition: background 0.3s ease;
  color: #333;
}

/* Container */
.container {
  background-color: #ffffff;
  padding: 30px;
  max-width: 650px;
  width: 100%;
  border-radius: 15px;
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
  animation: fadeIn 0.5s ease;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

/* Top bar with title and toggle */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

h1 {
  font-weight: 700;
  font-size: 28px;
}

/* Dark Mode Toggle Button */
#dark-mode-toggle {
  font-size: 22px;
  cursor: pointer;
  background: none;
  border: none;
  transition: transform 0.2s ease;
  user-select: none;
  color: #764ba2;
}

#dark-mode-toggle:hover {
  transform: rotate(20deg);
}

/* Text Area */
textarea {
  width: 100%;
  height: 200px;
  padding: 15px;
  font-size: 16px;
  border-radius: 10px;
  border: 1.5px solid #ccc;
  resize: vertical;
  transition: border 0.3s;
  font-family: inherit;
  color: #333;
  background-color: #fff;
}

textarea:focus {
  outline: none;
  border-color: #764ba2;
}

/* Buttons container */
.buttons {
  display: flex;
  gap: 15px;
}

.buttons button {
  flex: 1;
  padding: 12px 20px;
  border-radius: 8px;
  border: none;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  color: white;
  background: linear-gradient(45deg, #764ba2, #667eea);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
  transition: background 0.3s ease, box-shadow 0.3s ease;
  user-select: none;
}

.buttons button:hover {
  background: linear-gradient(45deg, #5a3e9e, #5468d6);
  box-shadow: 0 8px 20px rgba(84, 104, 214, 0.6);
}

/* Stats */
.stats {
  display: flex;
  justify-content: space-around;
  padding-top: 15px;
  border-top: 1px solid #ddd;
  gap: 15px;
  flex-wrap: wrap;
}

.stat {
  flex: 1 1 120px;
  text-align: center;
  background: #f0f0f7;
  padding: 12px 15px;
  border-radius: 12px;
  box-shadow: inset 0 0 5px #ddd;
  transition: background 0.3s ease;
}

.label {
  display: block;
  font-size: 14px;
  color: #555;
  margin-bottom: 5px;
  font-weight: 600;
}

.value {
  font-size: 24px;
  font-weight: bold;
  color: #764ba2;
}

/* Animation */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Dark Mode Styles */
body.dark-mode {
  background: #121212;
  color: #ddd;
}

body.dark-mode .container {
  background-color: #1e1e1e;
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.8);
}

body.dark-mode textarea {
  background-color: #2a2a2a;
  color: #eee;
  border-color: #555;
}

body.dark-mode textarea:focus {
  border-color: #bb86fc;
}

body.dark-mode .buttons button {
  background: linear-gradient(45deg, #bb86fc, #3700b3);
  box-shadow: 0 5px 15px rgba(187, 134, 252, 0.6);
  color: white;
}

body.dark-mode .buttons button:hover {
  background: linear-gradient(45deg, #9a68e8, #32007f);
  box-shadow: 0 8px 20px rgba(154, 104, 232, 0.8);
}

body.dark-mode .stat {
  background: #2c2c2c;
  box-shadow: inset 0 0 5px #444;
}

body.dark-mode .value {
  color: #bb86fc;
}

body.dark-mode #dark-mode-toggle {
  color: #bb86fc;
}