:root {
  --primary-color: #1877F2;
  --primary-hover: #166FE5;
  --secondary-color: #E4E6EB;
  --secondary-hover: #D8DADF;
  --success-color: #42B72A;
  --success-hover: #36A420;
  --danger-color: #F02849;
  --warning-color: #F2A116;
  
  --bg-main: #F0F2F5;
  --bg-card: #FFFFFF;
  --text-main: #050505;
  --text-secondary: #65676B;
  --border-color: #CED0D4;
  --border-radius: 8px;
  --box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  --font-family: 'Segoe UI', Helvetica, Arial, sans-serif;
  --transition-speed: 0.2s;
}

[data-theme="dark"] {
  --primary-color: #2D88FF;
  --primary-hover: #1877F2;
  --secondary-color: #3A3B3C;
  --secondary-hover: #4E4F50;
  --bg-main: #18191A;
  --bg-card: #242526;
  --text-main: #E4E6EB;
  --text-secondary: #B0B3B8;
  --border-color: #3E4042;
  --box-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-main);
  margin: 0;
  padding: 0;
  transition: background-color var(--transition-speed) ease;
}

* {
  box-sizing: border-box;
}

a {
  text-decoration: none;
  color: var(--primary-color);
}

a:hover {
  text-decoration: underline;
}

/* Auth Pages */
.auth-container {
  display: flex;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-box {
  background: var(--bg-card);
  padding: 30px;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.auth-logo {
  color: var(--primary-color);
  font-size: 3rem;
  font-weight: bold;
  margin-bottom: 10px;
}

.auth-subtitle {
  color: var(--text-main);
  font-size: 1.2rem;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 15px;
  text-align: left;
}

.form-control {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-main);
  color: var(--text-main);
  font-size: 1rem;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(24, 119, 242, 0.2);
}

.btn {
  display: inline-block;
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1.1rem;
  font-weight: bold;
  cursor: pointer;
  transition: background-color var(--transition-speed);
}

.btn-primary {
  background-color: var(--primary-color);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  text-decoration: none;
}

.btn-success {
  background-color: var(--success-color);
  color: #fff;
}

.btn-success:hover {
  background-color: var(--success-hover);
  text-decoration: none;
}

.auth-divider {
  border-bottom: 1px solid var(--border-color);
  margin: 20px 0;
}

.alert {
  padding: 10px;
  border-radius: var(--border-radius);
  margin-bottom: 15px;
  text-align: left;
}

.alert-danger {
  background-color: rgba(240, 40, 73, 0.1);
  color: var(--danger-color);
  border: 1px solid var(--danger-color);
}

.alert-success {
  background-color: rgba(66, 183, 42, 0.1);
  color: var(--success-color);
  border: 1px solid var(--success-color);
}