/* === Variables === */
:root {
  --color-bg-light: #f2f2f2;
  --color-text-light: #111;
  --color-bg-dark: #1a1a1a;
  --color-text-dark: #f5f5f5;
  --color-primary: #4a90e2;
  --color-accent: #f39c12;
  --color-btn-bg: #4a90e2;
  --color-btn-text: #fff;
  --transition-speed: 0.3s;
}

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

body {
  font-family: Arial, sans-serif;
  background-color: var(--color-bg-light);
  color: var(--color-text-light);
  transition: background-color var(--transition-speed),
    color var(--transition-speed);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

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

/* === Header === */
header {
  width: 100%;
  padding: 1rem;
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
}

/* Buttons */
button {
  padding: 0.5rem 1rem;
  border: none;
  background-color: var(--color-btn-bg);
  color: var(--color-btn-text);
  cursor: pointer;
  border-radius: 5px;
  transition: background-color var(--transition-speed);
}
button:hover {
  background-color: var(--color-accent);
}

/* === Main Section === */
main {
  width: 90%;
  max-width: 600px;
  margin-top: 2rem;
  text-align: center;
}

h1 {
  margin-bottom: 1rem;
}

#messageBoard {
  margin-bottom: 1rem;
  padding: 0.5rem;
  border-radius: 5px;
  transition: opacity 0.5s ease;
}

#messageBoard.success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

#messageBoard.error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

/* === Forms === */
form {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

input {
  padding: 0.5rem;
  border-radius: 5px;
  border: 1px solid #ccc;
  transition: border-color var(--transition-speed);
}
input:focus {
  border-color: var(--color-primary);
  outline: none;
}

/* === Feed / Posts === */
.post {
  background-color: #e0e0e0;
  padding: 0.8rem;
  margin-bottom: 0.5rem;
  border-radius: 5px;
  text-align: left;
  transition: background-color var(--transition-speed);
}

body.dark-mode .post {
  background-color: #333;
}

.post small {
  display: block;
  font-size: 0.7rem;
  margin-top: 0.3rem;
  color: #777;
}

body.dark-mode .post small {
  color: #bbb;
}

#charCount {
  display: block;
  text-align: right;
  font-size: 0.8rem;
  color: gray;
  margin-bottom: 0.3rem;
  transition: color 0.3s ease;
}

#charCount.warning {
  color: orange;
}

#charCount.error {
  color: red;
}

/* === Dark/Light Theme Toggle === */
#themeToggle {
  margin-left: auto;
  padding: 0.3rem 0.6rem;
  font-size: 0.9rem;
}