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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #121212 0%, #1E1E1E 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 400px;
}

.login-box {
    background: #1E1E1E;
    border: 1px solid #333;
    border-radius: 8px;
    padding: 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.logo-section {
    text-align: center;
    margin-bottom: 30px;
}

.logo-icon {
    font-size: 48px;
    margin-bottom: 10px;
}

.logo-section h1 {
    color: #fff;
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 5px;
    letter-spacing: 1px;
}

.subtitle {
    color: #888;
    font-size: 14px;
    font-weight: 300;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    color: #ccc;
    font-size: 14px;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px;
    background: #121212;
    border: 1px solid #333;
    border-radius: 4px;
    color: #fff;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #007ACC;
}

.btn-login {
    width: 100%;
    padding: 12px;
    background: #007ACC;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-login:hover {
    background: #005a9e;
}

.error-message {
    background: #ff4444;
    color: #fff;
    padding: 12px;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 14px;
    text-align: center;
}